Citation: Jinjing Huang, Chen Ding, Yongqiang Yang, Gang Liu, Wen-Bin Cai. An alternate aqueous phase synthesis of the Pt₃Co/C catalyst towards efficient oxygen reduction reaction[J]. Chinese Journal of Catalysis, ;2019, 40(12): 1895-1903. doi: S1872-2067(19)63338-3 shu

An alternate aqueous phase synthesis of the Pt₃Co/C catalyst towards efficient oxygen reduction reaction

a Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200433, China;
b Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China;
c School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China

Received Date: 2 January 2019
Revised Date: 28 February 2019

Fund Project: This work was supported by the National Basic Research Program of China (973 Program, 2015CB932303), the National Natural Science Foundation of China (NSFC) (21733004 and 21473039), and the International Cooperation Program of Shanghai Science and Technology Committee (STCSM) (17520711200).

Carbon supported Pt-Co alloys are among the most promising electrocatalysts towards oxygen reduction reaction (ORR) for the application in low temperature fuel cells and beyond, thus their facile and green synthesis is highly demanded. Herein we initially report an alternate aqueous phase one-pot synthesis of such catalysts (containing nominally ca. 20 wt.% Pt) based on dimethylamine borane (DMAB) reduction. The as-obtained electrocatalyst (denoted as Pt₃Co/C-DMAB) is compared with the ones obtained by NaBH₄ and N₂H₄·H₂O reduction (denoted as Pt₃Co/C-NaBH₄ and Pt₃Co/C-N₂H₄·H₂O, respectively) as well as a commercial Pt/C, in terms of the structure and electrocatalytic property. It turns out that Pt₃Co/C-DMAB exhibits the highest ORR performance among all the tested samples in an O₂-saturated 0.1 mol/L HClO₄, with the mass activity (specific activity) ca. 4 (6) times as large as that for Pt/C. After 10000 cycles of the accelerated degradation test, the half-wave potential for ORR on Pt₃Co/C-DMAB decreases only by 4 mV, in contrast to 24 mV for that on Pt/C. Pt₃Co/C-NaBH₄ or Pt₃Co/C-N₂H₄·H₂O shows a specific activity comparable to that for Pt₃Co/C-DMAB, but a mass activity similar to that for Pt/C. ICP-AES, TEM, XRD and XPS characterizations indicate that Pt₃Co nanoparticles are well-dispersed and alloyed with a mean particle size of ca. 3.4 ±0.4 nm, contributing to the prominent electrocatalytic performance of Pt₃Co/C-DMAB. This simple aqueous synthetic route may provide an alternate opportunity for developing efficient practical electrocatalysts for ORR.
- ORR electrocatalyst,
- Pt-Co alloy,
- Aqueous phase synthesis,
- Dimethylamine borane,
- Structure and property
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An alternate aqueous phase synthesis of the Pt₃Co/C catalyst towards efficient oxygen reduction reaction