Catalyst for preparing dihydroxyacetone by selectively oxidizing glycerol and preparation method thereof
By growing bismuth oxychloride nanosheets in situ on the zirconium oxide surface to form a BiOCl@ZrO2 composite support and anchor platinum nanoparticles, the problem of easy aggregation of platinum nanoparticles was solved, and efficient catalysis for the selective oxidation of glycerol to dihydroxyacetone was achieved, improving the stability and selectivity of the catalyst.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INNER MONGOLIA UNIVERSITY
- Filing Date
- 2026-02-03
- Publication Date
- 2026-06-09
AI Technical Summary
In existing glycerol oxidation catalysts, platinum nanoparticles tend to agglomerate, resulting in low selectivity for dihydroxyacetone. Furthermore, existing Bi promoters lack structural stability and surface chemistry, making it difficult to achieve precise control over Pt active sites.
By growing bismuth oxychloride nanosheets in situ on the surface of zirconium oxide to form a BiOCl@ZrO2 composite support, and anchoring platinum nanoparticles at its interface, a platinum-bismuth oxychloride-zirconia interface anchoring structural unit was constructed, achieving stable fixation of Pt and regulation of its electronic structure.
It significantly inhibited Pt aggregation, improved the structural stability of the catalyst and the selectivity of glycerol to dihydroxyacetone, and achieved efficient and selective oxidation under mild conditions, thereby improving the production efficiency of dihydroxyacetone.
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Figure CN122164448A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of glycerol oxidation catalyst technology, and relates to a catalyst for the selective oxidation of glycerol to prepare dihydroxyacetone and its preparation method. Specifically, it is a pinned platinum / bismuth oxychloride@zirconia catalyst for the selective oxidation of glycerol to prepare dihydroxyacetone, wherein bismuth oxychloride and zirconium oxide constitute a heterojunction composite support, and finally form a platinum-bismuth oxychloride-zirconia interface anchoring structural unit. Background Technology
[0002] With the increasing demand for high-value utilization of biomass resources, the selective oxidation of polyols, represented by glycerol, has attracted growing attention. Glycerol is an important byproduct of the biodiesel industry, and its catalytic oxidation can convert it into high-value-added chemicals such as dihydroxyacetone, glyceraldehyde, and glyceric acid, which is considered an important technological pathway for achieving the refined utilization of biomass. Among these, dihydroxyacetone has wide applications in the pharmaceutical, cosmetic, and fine chemical industries and has high economic value. Therefore, developing a catalytic system that can efficiently and selectively convert glycerol into dihydroxyacetone under mild conditions is of significant practical importance.
[0003] In existing glycerol oxidation catalytic systems, platinum (Pt) is widely used due to its strong dehydrogenation activation ability for alcohols. However, single Pt catalysts typically preferentially activate primary hydroxyl groups in the glycerol oxidation reaction, leading to the conversion of glycerol mainly into products such as glyceric acid, resulting in low selectivity for dihydroxyacetone. To improve this issue, researchers often introduce bismuth (Bi) as a promoter to regulate the adsorption behavior of different hydroxyl groups on the Pt surface, thereby increasing the formation of dihydroxyacetone. In current technologies, Bi is usually constructed by combining it with Pt in the form of Bi₂O₃ or its derivatives. Although this can suppress the over-activation of primary hydroxyl groups by Pt to some extent, its structural stability, surface chemistry, and interaction with Pt are still insufficient, making it difficult to achieve precise control over the active sites of Pt. Furthermore, Pt nanoparticles in the system are prone to aggregation, leading to decreased activity and further affecting the selectivity of dihydroxyacetone.
[0004] Therefore, how to achieve stable anchoring of Pt nanoparticles and effectively inhibit their aggregation is a key problem that needs to be solved by existing technologies. Summary of the Invention
[0005] To address the aforementioned technical problems, the main objective of this invention is to provide a method for preparing a catalyst for the selective oxidation of glycerol to dihydroxyacetone. By anchoring Pt nanoparticles at the interface of the BiOCl-ZrO2 heterojunction, not only can Pt aggregation be effectively suppressed, but the directional adsorption capacity and electron transfer effect of BiOCl for hydroxyl groups can also be fully utilized, thereby constructing a glycerol selective oxidation system with excellent catalytic performance.
[0006] To achieve the above objectives, in a first aspect, the present invention provides a method for preparing a catalyst for the selective oxidation of glycerol to dihydroxyacetone, comprising the following steps:
[0007] S1. Preparation of zirconium oxide support ZrO2;
[0008] S2. Disperse the zirconium oxide support ZrO2 and bismuth chloride in ethanol at a mass ratio of (15~20):(1~1.5), and then carry out a hydrothermal reaction at 90~160℃ in a closed reactor to allow bismuth oxychloride to grow in situ on the ZrO2 surface, thus obtaining the BiOCl@ZrO2 composite support.
[0009] S3. The BiOCl@ZrO2 composite support was dispersed in ethanol, and chloroplatinic acid solution was added. After being ultrasonically and stirred to mix evenly, sodium borohydride was added to carry out a reduction reaction to form a platinum-bismuth oxychloride-zirconia interface anchoring structural unit at the BiOCl-ZrO2 heterojunction interface. Finally, the mixture was washed and dried to obtain a catalyst for the selective oxidation of glycerol to prepare dihydroxyacetone.
[0010] As a further preferred embodiment of the present invention, the step of preparing the zirconia support ZrO2 includes: dissolving zirconium oxynitrate ZrO(NO3)2·H2O in deionized water, adding sodium carbonate solution to adjust the pH to alkaline, aging at 40-60°C for 2-6 hours, followed by cooling, washing, drying, and then air calcination to obtain the zirconia support ZrO2. It should be noted that the zirconia support ZrO2 in this invention can also be prepared using conventional solid-phase, liquid-phase, or gas-phase methods, which will not be exemplified here.
[0011] As a further preferred technical solution of the present invention, the pH value is adjusted to 12 or above, such as typical but non-limiting pH values like pH=12, 12.5, 13 or 13.5.
[0012] As a further preferred embodiment of the present invention, the conditions for the air calcination treatment are as follows: heating to 300-500°C at a heating rate of 2-10°C / min, and calcining for 4-12 hours. The calcination temperature can be a typical but not limiting value such as 300°C, 400°C, or 500°C.
[0013] As a further preferred technical solution of the present invention, the concentration of the chloroplatinic acid solution is 0.001~0.05wt%, specifically typical but non-limiting concentration values such as 0.005wt%, 0.01wt%, 0.02wt%, and 0.03wt%.
[0014] As a further preferred embodiment of the present invention, the loading of platinum nanoparticles in the catalyst is 2.5~5wt%, specifically, typical but non-limiting loading values such as 2.5wt%, 3wt%, 3.5wt%, 4wt%, 4.5wt%, and 5wt%.
[0015] According to a second aspect of the present invention, the present invention also provides a catalyst for the selective oxidation of glycerol to prepare dihydroxyacetone, which is prepared by the above-described preparation method. The catalyst is composed of platinum metal nanoparticles and a bismuth oxychloride-zirconia composite support, wherein bismuth oxychloride is grown in situ on the surface of zirconia to form a heterojunction interface, and the platinum metal nanoparticles are fixed to the heterojunction interface by simultaneously anchoring with bismuth oxychloride and zirconia, forming a platinum-bismuth oxychloride-zirconia interface anchoring structural unit.
[0016] According to a third aspect of the present invention, the present invention also provides an application of a catalyst for the selective oxidation of glycerol to dihydroxyacetone under neutral conditions.
[0017] This invention employs the above-mentioned technical solution, constructing a bismuth oxychloride nanosheet heterojunction interface in situ on the zirconium oxide surface. This allows platinum nanoparticles to be simultaneously anchored at the bismuth oxychloride and zirconium oxide interface during reduction, thereby forming a stable platinum-bismuth oxychloride-zirconia interface anchoring structural unit. This interface structure provides spatial confinement and interfacial electronic regulation to the platinum active sites, significantly optimizing the adsorption and dehydrogenation pathways of glycerol molecules on the platinum surface, thus promoting the highly selective oxidation of glycerol to dihydroxyacetone under neutral conditions. Compared with existing technologies, this invention, employing the above-mentioned technical solution, achieves the following beneficial effects:
[0018] (1) By fixing Pt nanoparticles at the interface of BiOCl and ZrO2 heterojunction, the present invention achieves precise control of Pt spatial configuration, so that Pt can form stable interfacial interaction with BiOCl and ZrO2 at the same time, thereby significantly inhibiting the migration and aggregation of Pt in the reaction process and improving the structural stability of the catalyst.
[0019] (2) The present invention can generate electron redistribution at the interface through the heterogeneous interface formed by BiOCl and ZrO2. The Pt nanoparticles anchored at the interface have a synergistic electronic coupling effect with the two carriers, thereby regulating the electronic structure of Pt, optimizing its adsorption and activation behavior of glycerol molecules, and making Pt more conducive to promoting the directional oxidation reaction pathway of secondary hydroxyl groups.
[0020] (3) The present invention effectively suppresses the overactivation of the product and side reactions such as CC bond breaking through the synergistic effect of interface electronic regulation and spatial pinning, thereby significantly improving the selectivity of glycerol to dihydroxyacetone conversion.
[0021] (4) The present invention has the characteristics of simple preparation process, environmental friendliness and novel structure. The constructed interface pinned Pt / BiOCl@ZrO2 catalyst can achieve efficient and selective oxidation of glycerol under mild conditions, providing a feasible and practical technical path for the green preparation of high value-added chemicals such as dihydroxyacetone, which is of great significance for the high-value utilization of biomass resources. Attached Figure Description
[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0023] Figure 1 The image shows a scanning electron microscope (SEM) image of the Pt / BiOCl@ZrO2 catalyst prepared in Example 1, where a and b represent different magnifications.
[0024] Figure 2 Scanning electron microscope (SEM) image of the Pt / BiOCl catalyst prepared for Comparative Example 3.
[0025] Figure 3 Scanning electron microscope (SEM) image of the Pt / ZrO2 catalyst prepared for Comparative Example 2.
[0026] Figure 4 The X-ray diffraction (XRD) analysis results are shown for the Pt / BiOCl@ZrO2 catalyst prepared in Example 1.
[0027] Figure 5 For 60℃, 0.1 mol·L -1 The results of comparing the glycerol conversion rates of the Pt / BiOCl@ZrO2 catalyst prepared in Example 1 with those of Pt / ZrO2 and Pt / BiOCl in Comparative Examples 1 and 2 under glycerol reaction conditions.
[0028] Figure 6 For 60℃, 0.1 mol·L -1 Results of glycerol conversion of the BiOCl@ZrO2 catalyst prepared in Example 1 under glycerol reaction conditions.
[0029] Figure 7 For 60℃, 0.1 mol·L -1 The selectivity of each reaction product of the Pt / BiOCl@ZrO2 catalyst prepared in Example 1 was compared with that of Pt / ZrO2 and Pt / BiOCl in Comparative Examples 1 and 2 under the conditions of glycerol and a reaction time of 10 h.
[0030] Figure 8 At 60℃ and a glycerol concentration of 0.1 mol·L⁻¹ -1Under the condition of a reaction time of 10 h, the changes in glycerol conversion rate and dihydroxyacetone selectivity of the Pt / BiOCl@ZrO2 catalyst prepared in Example 1 during 10 consecutive recycling cycles were investigated.
[0031] Figure 9 The image shows a scanning electron microscope (SEM) image of the Pt / BiOCl@ZrO2 catalyst prepared in Example 1 after 10 consecutive recovery reactions.
[0032] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0033] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0034] Unless otherwise defined, the technical terms used in the following embodiments have the same meanings as commonly understood by those skilled in the art to which this invention pertains. Unless otherwise specified, the experimental reagents used in the following embodiments are conventional biochemical reagents; and the experimental methods described are conventional methods.
[0035] Example 1
[0036] The method for preparing the catalyst for the selective oxidation of glycerol to dihydroxyacetone provided in this embodiment is as follows:
[0037] Step 1, Preparation of ZrO2:
[0038] Weigh 2.21 g of ZrO(NO3)2·H2O into a single-necked round-bottom flask, add 60 mL of deionized water, adjust the pH to 13 with 0.8 M Na2CO3 solution, and age the reaction solution in a 40℃ oil bath for 4 hours. Cool to room temperature, wash 4 times with deionized water and 1 time with ethanol. Dry in a 60℃ forced-air drying oven for 6 hours. Place the dried sample in a muffle furnace and calcine at 400℃ (heating rate 2-10 ℃ / min) for 8 hours to obtain the support ZrO2.
[0039] Step 2, Preparation of BiOCl@ZrO2:
[0040] The ZrO2 material prepared in step 1 was dispersed in ethanol at a mass ratio of 15:1 to BiCl3 to form a dispersion. An appropriate proportion of BiCl3 was added to the dispersion, and the mixture was treated with ultrasound for 40 min to obtain a uniformly dispersed precursor solution. The dispersion was then transferred to a polytetrafluoroethylene-lined reactor and subjected to a hydrothermal reaction at 160 °C for 5 h. After the reaction, the mixture was allowed to cool naturally to room temperature, washed with deionized water, and dried to obtain the BiOCl@ZrO2 composite material.
[0041] Step 3, Preparation of Pt / BiOCl@ZrO2:
[0042] Weigh 0.015 g of the BiOCl@ZrO2 material from step 2 and place it in a round-bottom flask. Add 90 ml of ethanol to disperse it. Pipette 2.10 mL of 0.01 wt% H2PtCl6 solution into the reaction solution. Mix thoroughly under ultrasonic conditions and continue magnetic stirring for 2 hours. Weigh 2 g of NaBH4 powder and quickly add it to the reaction solution. Place the precipitate obtained by centrifugation and washing in a 60°C oven and dry overnight to obtain the Pt / BiOCl@ZrO2 catalyst for the selective oxidation of glycerol to dihydroxyacetone, with a Pt loading of 5 wt%.
[0043] Comparative Example 1
[0044] As a control experiment for Example 1, the difference from Example 1 is that the catalyst was prepared by supporting Pt on a ZrO2 support, i.e., BiOCl in the BiOCl@ZrO2 composite support was omitted. The specific steps are as follows:
[0045] The ZrO2 support was prepared according to step 1 of Example 1. 0.012 mmol of ZrO2 material was weighed and placed in a round-bottom flask, and 90 mL of ethanol was added for dispersion. 2.10 mL of 0.01 wt% H2PtCl6 solution was pipetted into the reaction solution, and after thorough mixing under ultrasonic conditions, magnetic stirring was continued for 2 hours. 2 g of NaBH4 powder was weighed and quickly added to the reaction solution. The precipitate obtained by centrifugation and washing was dried overnight in a 60°C oven to obtain the Pt / ZrO2 catalyst.
[0046] Comparative Example 2
[0047] As a control experiment for Example 1, the difference from Example 1 is that the catalyst was prepared using BiOCl-supported Pt, i.e., the ZrO2 in the BiOCl@ZrO2 composite support was omitted. The specific steps are as follows:
[0048] Step 1, Preparation of BiOCl:
[0049] 2 mmol of bismuth nitrate pentahydrate was weighed and added to 80 mL of ethylene glycol. The solution was sonicated for 30 min to ensure complete dissolution and form a homogeneous solution. Then, 2 mmol of potassium chloride was added to the solution, and the reaction was continued for 1 h under magnetic stirring to ensure thorough mixing and reaction of the bismuth and chloride sources. The resulting reaction system was transferred to a stainless steel-lined high-pressure reactor and reacted at 80 °C for 5 h. After the reaction, the mixture was allowed to cool naturally to room temperature. The resulting solid product was collected and washed four times alternately by centrifugation with deionized water and anhydrous ethanol to remove residual ions and solvent. The washed precipitate was then dried in a 60 °C oven to obtain the target product, BiOCl.
[0050] Step 2, Preparation of Pt / BiOCl:
[0051] Weigh 0.012 mmol of the BiOCl material from step 1 into a round-bottom flask and disperse it in 90 mL of ethanol. Use a pipette to add 2.10 mL of 0.01 wt% H₂PtCl₆ solution to the reaction mixture, mix thoroughly under ultrasonic conditions, and then continue magnetic stirring for 2 hours. Weigh 2 g of NaBH₄ powder and quickly add it to the reaction mixture. Place the precipitate obtained by centrifugation and washing in a 60°C oven and dry overnight to obtain the Pt / BiOCl catalyst.
[0052] See Figure 1 As shown in the scanning electron microscope (SEM) images, the Pt / BiOCl@ZrO2 catalyst prepared in Example 1 exhibits an overall nanoparticle aggregate morphology. BiOCl grows in situ in a plate-like structure and is uniformly distributed on the surface of the ZrO2 support, while Pt nanoparticles are mainly enriched in the interface region formed by the BiOCl nanosheets and ZrO2 particles. This tight heterogeneous interface constructed by the plate-like BiOCl and ZrO2 particles provides a favorable structural basis for the anchoring and stable dispersion of Pt species. Overall, the material exhibits a loose, multi-level assembly structure and a rich porous system, which facilitates rapid mass transfer of reactants and sufficient exposure of active sites, thereby promoting the catalytic reaction.
[0053] Figure 2 Here is a scanning electron microscope (SEM) image of Pt / BiOCl from Comparative Example 2. Figure 3 This is a scanning electron microscope (SEM) image of Pt / ZrO2 in Comparative Example 1.
[0054] from Figures 1 to 3The SEM images show that Pt / BiOCl mainly exhibits a typical lamellar or layered stacked structure, with unevenly dispersed particles visible on the surface, which can be attributed to the loaded Pt species, but their exposure and anchoring positions are relatively limited. Pt / BiOCl@ZrO2 exhibits a distinctly different hierarchical composite morphology. The BiOCl lamellar structure is clearly discernible, with its edges and inter-lamellae regions modified by fine ZrO2 nanoparticles, forming a tightly contacted heterogeneous interface structure. High-magnification images show Pt nanoparticles distributed at the interface between BiOCl and ZrO2, indicating that Pt is mainly anchored to the interface defects formed by the two supports. This "interface anchoring" structure helps suppress Pt aggregation and enhances metal-support interactions, thereby improving Pt stability and utilization efficiency. The Pt / ZrO2 sample mainly consists of granular ZrO2 aggregates, with Pt dispersed on the ZrO2 surface. However, due to the lack of heterogeneous interface regulation, its spatial distribution is more random, and a certain degree of aggregation tendency can be observed at high magnification. In summary, the construction of the BiOCl@ZrO2 heterostructure in Pt / BiOCl@ZrO2 significantly alters the anchoring mechanism of Pt, making Pt preferentially stable at the angle between the two phase supports. This unique structural feature provides an important structural basis for its excellent catalytic performance.
[0055] Depend on Figure 4 The X-ray diffraction pattern confirms the successful synthesis of Pt / BiOCl@ZrO2 material.
[0056] The catalysts of Example 1 and Comparative Examples 1 and 2 were used for the selective oxidation of glycerol to prepare dihydroxyacetone for comparative testing. The specific method was as follows: all glycerol oxidation tests were carried out under neutral conditions. 15 mL of 100 mM glycerol was dissolved in water and 39 mg of catalyst was added. The solution was transferred to a 25 mL three-necked flask and placed in an oil bath at 60 °C. After the set temperature was reached, oxygen was introduced (flow rate of 150 mL / min), and 0.4 mL samples were taken at regular intervals. After the reaction was completed, the catalyst was separated by centrifugation.
[0057] (1) Under the same reaction conditions as described above, the glycerol oxidation performance of catalysts Pt / BiOCl@ZrO2 (Example 1), BiOCl@ZrO2 (Example 1), Pt / ZrO2 (Comparative Example 1), and Pt / BiOCl (Comparative Example 2) was compared, and the results are as follows: Figure 5 and Figure 6 As shown in the figure, the Pt / BiOCl@ZrO2 catalyst exhibits the best performance in terms of both glycerol conversion and dihydroxyacetone selectivity. Specifically, the conversion rate of Pt / BiOCl@ZrO2 reaches 82.1%, significantly higher than that of the two comparative samples (…). Figure 3Regarding the selectivity for dihydroxyacetone, Pt / BiOCl@ZrO2 achieved 53.5%, while Pt / ZrO2 and Pt / BiOCl only achieved 7.7% and 49%, respectively. Figure 4 This indicates that while Pt exhibits high glycerol conversion capacity when ZrO2 is used as the support alone, the selectivity for dihydroxyacetone is extremely low due to the lack of effective control over the reaction pathway. While the Pt / BiOCl catalyst can improve DHA selectivity to some extent, its overall conversion rate is significantly low due to the tendency of Pt to aggregate and insufficient utilization of active sites. In contrast, Pt / BiOCl@ZrO2 anchors Pt nanoparticles at the BiOCl-ZrO2 composite interface in a "riveting" manner, ensuring not only high Pt dispersion and activity but also leveraging the regulatory effect of BiOCl on the electronic structure and adsorption behavior of Pt to preferentially dehydrogenate the secondary hydroxyl group of glycerol to dihydroxyacetone. This achieves a synergistic improvement in both high conversion rate and high DHA selectivity, demonstrating significant interfacial synergistic effects and structural advantages.
[0058] (2) Under the same reaction conditions described above, the catalytic stability of catalysts Pt / BiOCl@ZrO2 (Example 1), Pt / ZrO2 (Comparative Example 1), and Pt / BiOCl (Comparative Example 2) in the glycerol oxidation process was compared. Experimental results showed that after 10 consecutive reactions under the same conditions, the glycerol conversion and dihydroxyacetone selectivity of Pt / BiOCl@ZrO2 remained almost unchanged, demonstrating excellent cycle stability (Figure 8). Furthermore, SEM characterization of the catalyst after the reaction showed that its unique "angle-anchored" structure did not change significantly after the reaction (…). Figure 9 The ab in the figure correspond to different scales, indicating that the catalyst maintained good structural integrity during the reaction. This stability stems from the Pt-bismuth oxychloride-zirconia interface anchoring structure constructed in this invention. This structure effectively inhibits the migration and aggregation of Pt nanoparticles under reaction conditions and enhances the interaction between the metal and the support, thereby significantly improving the stability and utilization efficiency of Pt. Therefore, the catalyst of this invention also exhibits a significant advantage in terms of stability.
[0059] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and various changes or modifications can be made to these embodiments without departing from the principles and essence of the present invention. The scope of protection of the present invention is defined only by the appended claims.
Claims
1. A method for preparing a catalyst for the selective oxidation of glycerol to dihydroxyacetone, characterized in that, Includes the following steps: S1. Preparation of zirconium oxide support ZrO2; S2. Disperse zirconia support ZrO2 and bismuth chloride in ethanol at a mass ratio of (15~20):(1~1.5), and then carry out a hydrothermal reaction at 90~160℃ in a closed reactor to allow bismuth oxychloride to grow in situ on the surface of zirconia support ZrO2, thereby obtaining BiOCl@ZrO2 composite support. S3. The BiOCl@ZrO2 composite support was dispersed in ethanol, and chloroplatinic acid solution was added. After being ultrasonically and stirred to mix evenly, sodium borohydride was added to carry out a reduction reaction to form a platinum-bismuth oxychloride-zirconia interface anchoring structural unit at the BiOCl-ZrO2 heterojunction interface. Finally, the mixture was washed and dried to obtain a catalyst for the selective oxidation of glycerol to prepare dihydroxyacetone.
2. The method for preparing the catalyst for the selective oxidation of glycerol to dihydroxyacetone according to claim 1, characterized in that, The steps for preparing the zirconium oxide support ZrO2 include: Zirconium oxynitrate was dissolved in deionized water, and sodium carbonate solution was added to adjust the pH to alkaline. The mixture was aged at 40-60°C for 2-6 hours, then cooled, washed, dried, and calcined in air to obtain zirconium oxide support ZrO2.
3. The method for preparing the catalyst for the selective oxidation of glycerol to dihydroxyacetone according to claim 2, characterized in that, The pH value is adjusted to above 12.
4. The method for preparing the catalyst for the selective oxidation of glycerol to dihydroxyacetone according to claim 2, characterized in that, The conditions for the air roasting treatment are as follows: heating to 300-500°C at a heating rate of 2-10°C / min, and the air roasting treatment time is 4-12 h.
5. The method for preparing the catalyst for the selective oxidation of glycerol to dihydroxyacetone according to claim 1, characterized in that, The concentration of the chloroplatinic acid solution is 0.001~0.05 wt%.
6. The method for preparing the catalyst for the selective oxidation of glycerol to dihydroxyacetone according to claim 1, characterized in that, The catalyst has a platinum nanoparticle loading of 2.5~5wt%.
7. A catalyst for the selective oxidation of glycerol to prepare dihydroxyacetone, characterized in that, It is prepared by the preparation method according to any one of claims 1-6.
8. The application of the catalyst for the selective oxidation of glycerol to dihydroxyacetone according to claim 7 in the selective oxidation of glycerol to dihydroxyacetone under neutral conditions.