Gas diffusion electrode carried with double-shell core-shell catalyst and preparation and application thereof
A gas diffusion electrode, core-shell catalyst technology, applied in battery electrodes, circuits, electrical components, etc., to achieve the effect of enhanced stability, stable performance, and easy mass production
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Embodiment 1
[0040] Example 1: Preparation of a gas diffusion electrode loaded with a Pt / Au / PdCo / C double-shell core-shell catalyst.
[0041] (1) Preparation of gas diffusion layer:
[0042] First, set the size to 2×2cm 2 Carbon paper (Toray TGP-060H) is weighed and completely immersed in 2wt.% PTFE emulsion for 30 seconds, then taken out, then dried with a hair dryer and weighed again, and the percentage of PTFE that has been leached is calculated accordingly content. Repeat the above impregnation and drying process until the PTFE load in the carbon paper is 10wt.%, then place the hydrophobized carbon paper in a muffle furnace, heat-treat at 340°C for 0.5h, take it out after cooling down to room temperature, and obtain a support Floor.
[0043] Weigh 12mg XC-72 carbon powder, then add 20ml of ethanol, ultrasonically oscillate, and stir with a glass rod, disperse evenly and add 5wt.% Solution (DuPont, EW=1100) 24mg, make the slurry The content of the dry resin is 10wt.%. After sti...
Embodiment 12
[0060] Example 12: Preparation of gas diffusion electrode loaded with Pt / Au / PdNi / C double-shell core-shell catalyst.
[0061] (1) Preparation of gas diffusion layer: same as Example 1;
[0062] (2) Preparation of catalyst core:
[0063] a. Add 23mg Pd(NO 3 ) 2 , while adding 14.9mgNi(COOH) 2 (Pd / Ni atomic ratio is 1:1), stir to make it evenly mixed, then add 25mg BP2000 carbon powder to the mixed solution and ultrasonically disperse until the mixed solution is uniform;
[0064] b. Add 50mL of 0.010M sodium citrate aqueous solution dropwise to the mixture obtained in the above step (1)a, then slowly add 50mL of 0.1M NaBH4 solution dropwise under rapid stirring, let it stand for 30min and filter to obtain solid matter, then use deionized The obtained solid matter is washed with water, and the obtained matter after washing is placed in an 80° C. vacuum oven and dried for 5 h to obtain a PdNi / C catalyst;
[0065] c. put the PdNi / C obtained in step (1) b at 200°C, 10vol%H 2 A...
Embodiment 13
[0071] Example 13: Preparation of gas diffusion electrode loaded with Pt / Au / PdCu / C double-shell core-shell catalyst.
[0072] (1) Preparation of gas diffusion layer: same as Example 1;
[0073] (2) Preparation of catalyst core:
[0074] a. Add 115mg Pd(NO 3 ) 2 , while adding 16mgCuSO 4 (Pd / Cu atomic ratio is 5:1), stir to make it evenly mixed, then add 540mg acetylene black carbon powder to the mixed solution and ultrasonically disperse until the mixed solution is uniform;
[0075] b. Add 10mL of 0.050M sodium citrate aqueous solution dropwise to the mixture obtained in the above step (1)a, then slowly add 50mL of 0.1M NaBH4 solution dropwise under rapid stirring, let stand for 30min and filter to obtain solid matter, then use deionized Water is washed with gained solid matter, and the gained matter after washing is placed in 80 ℃ of vacuum ovens and dried 20h, obtains PdCu / C catalyst;
[0076] c. put the PdCu / C obtained in step (1) b at 600°C, 1vol%H 2 Alloyed PdCu / C c...
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