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A platinum/platinum dichloride composite material with cubic crystal structure and its nonlinear synthesis method and application
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A kind of platinum dichloride, cubic crystal technology, applied in the field of composite materials and their preparation, to achieve huge application potential and application value, the effect of excellent hydrogen production performance
Active Publication Date: 2020-11-17
WENZHOU UNIV
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Therefore, based on the defects of the above synthetic methods, the use of self-organization and self-regulation of the chemical reaction system to obtain the self-regulation of the reaction rate or the concentration of functional molecules (such as nonlinear oscillation) has not been studied and applied. Obviously, this novel kinetic The development of regulatory means provides unprecedented opportunities and challenges for the realization of controllable preparation of new structures and high-performance noble metal nanocatalysts, and this is the basis and motivation for the completion of the present invention
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Embodiment 1
[0054] S1: Put p-nitrophenol, sodium bromate and sulfuric acid in a single water bath electrolytic cell, react at 25.0°C and atmospheric pressure, and monitor its chemical oscillation curve with the open circuit potential-time in the CHI electrochemical workstation, in which p-nitrophenol The concentration ratio of phenol, sodium bromate and sulfuric acid is 1:3:100.
[0055] S2: At the top of the first cycle of the chemical oscillation curve, add 0.0025 g of platinum dichloride ultrasonically dispersed with 5 mL of deionized water at one time, and react for 2.0 hours to obtain a reaction solution;
[0056] S3: Centrifuge the reaction solution at a centrifugal speed of 18000 rpm for 5 minutes, wash the obtained precipitate with deionized water, acetone, and absolute ethanol successively for 2-3 times, and then add absolute ethanol for storage to obtain the cubic Crystal structure platinum / platinum dichloride catalytic composite material, which is named as M1.
Embodiment 2-4
[0057] Embodiment 2-4: the investigation of dichloride add-on amount in the step S2
[0058] Except that the platinum dichloride consumption in step S2 is respectively replaced by (a) 0.0015g, (c) 0.0035g, (d) 0.0045g, other operations are all the same, thereby carried out embodiment 2-4 successively, They are named C2-C4 respectively.
Embodiment 5-7
[0059] Embodiment 5-7: the investigation of reaction time in step S2
[0060] Except that after adding platinum dichloride in step S2, the reaction time is replaced by (a) 0.5h, (c) 3.0h, (d) 10.0h respectively, other operations are all the same, thereby repeat operation embodiment 1, thereby Embodiments 5-7 were carried out sequentially, and the obtained composite materials were named C5-C7 in sequence.
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Abstract
The invention relates to a platinum / platinum dichloride composite material having a cubic crystal structure, and a nonlinear synthesis method and an application thereof. The method comprises the following steps: S1, reacting p-nitrophenol, sodium bromate and sulfuric acid at room temperature, and recording the chemical oscillation reaction by using an open circuit-time curve; and S2, adding a platinum dichloride raw material to the system at one time in the reaction process, taking out a reaction solution obtained after the reaction finished, centrifuging the reaction solution, and cleaning the obtained reaction product to obtain the platinum / platinum dichloride catalysis composite material having the cubic crystal structure. The preparation method innovatively combines nonlinear chemicaloscillation with the preparation of noble metals to obtain the platinum / platinum dichloride catalysis composite material having the cubic crystal structure, with an excellent hydrogen production performance, and the platinum / platinum dichloride catalysis composite material having the cubic crystal structure can be used in the field of water electrolysis for water production, and has a good application prospect and a good industrialization potential.
Description
technical field [0001] The invention provides a composite material and its preparation method and application, more specifically, it provides a platinum / platinum dichloride composite material with a cubic crystal structure that can be used for hydrogen production by electrolysis of water, and its nonlinear synthesis method and application. It belongs to the field of inorganic functional materials. Background technique [0002] With more and more environmental problems and non-renewable fossil fuels, it is urgent to develop new technologies to replace energy conversion and storage devices such as solar cells, lithium-ion batteries, supercapacitors and fuel cells to solve the energy crisis. Recently, researchers have pinned their hopes on the development of high-performance fuel cells, in which catalyst performance is an important factor controlling the improvement of fuel cell performance. Platinum group metals have naturally attracted widespread attention as the most effici...
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