A kind of preparation method of ni/fe/cr based composite material of high efficiency catalyst for oxygen evolution reaction
A technology of catalyst and mixed solution, which is applied in the field of preparation of Ni/Fe/Cr-based composite materials, can solve the problems of high price, scarce reserves, low energy efficiency, etc., and achieve cheap raw materials, simple and efficient preparation methods, and good catalytic performance Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0040] The Ni:Fe mass ratio in the iron-nickel foam used in the preparation method according to the present invention can be in the range of 10:90 to 50:50, more preferably 20:80 to 40:60, most preferably 30: 70. When the Ni:Fe mass ratio is less than 10:90, that is, the Ni content is very small, or when the Ni:Fe mass ratio is greater than 50:50, that is, the Ni content ratio is large, and the catalytic performance of the product is not good. The possible reason is that when the Ni content is very small, it may be difficult to form the active ingredient Ni 3 S 2 and NiCr 2 o 4 , chromium may be more based on Cr 2 S 3 The form exists, and does not form a good recombination with Fe atoms, resulting in insignificant performance improvement. If the proportion of Ni content is large, it may cause more chromium to be Cr 2 o 3 The existence of the form, also leads to the compound effect is not significant, and then leads to the performance improvement is not obvious.
[004...
Embodiment 1
[0044] 1) Foamed iron-nickel (1cm×1.5cm, Ni:Fe mass ratio is 30:70) was cleaned with a mixed solution of absolute ethanol and acetone with a volume ratio of 1:1, and ultrasonic cleaning in 1M HCl for 15 minutes, and then washed with Rinse several times with deionized water;
[0045] 2) Dissolve 0.05 mmol of chromium nitrate nonahydrate and 0.05 mmol of thiourea in 15 mL of deionized water, and magnetically stir for 10 minutes to obtain a clear solution;
[0046] 3) Then, the iron-nickel foam cleaned in step 1) was immersed in the clarified solution obtained in step 2), and transferred to a 20 mL stainless steel autoclave lined with PTFE, and reacted at 160 °C for 3 h. After it was naturally cooled to room temperature, the obtained foamed iron-nickel composite material was taken out, washed gently with deionized water several times, and dried in a vacuum oven at 60°C for 2 hours.
[0047] figure 1 The XPS diagram of the Ni / Fe / Cr-based composite material prepared for this exam...
Embodiment 2
[0050] The catalyst material was prepared in the same manner as in Example 1 except that 0.025 mmol of chromium nitrate nonahydrate and 0.5 mmol of thiourea were used as reactants.
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More