Issue 41, 2021

Trimetallic PtNiCo branched nanocages as efficient and durable bifunctional electrocatalysts towards oxygen reduction and methanol oxidation reactions

Abstract

Engineering the composition and structure of Pt-based alloy electrocatalysts has exhibited great promise for enhancing activity and durability in the oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR). However, it remains a great challenge to completely achieve this goal because of sluggish kinetics and surface CO poisoning. Herein, we successfully constructed trimetallic PtNiCo branched nanocages via a simple etching treatment. The trimetallic PtNiCo nanocages exhibited outstanding activity and durability in both acidic ORR and MOR. Strikingly, the mass activity of the catalyst in ORR and MOR reached 1.03 A mgPt−1 and 2.82 A mgPt−1, with 13.8- and 5.6-times enhancement of specific activity compared to Pt/C. Detailed investigations reveal that the most optimized electronic structure for the d-band center (a 0.17 eV downshift compared to pure Pt) by the alloying effect of Co and Ni contributed to the enhanced performances and great CO-tolerance of such unique Pt-based catalysts, which provide a new perspective for designing high-performance electrocatalysts for commercial fuel cells.

Graphical abstract: Trimetallic PtNiCo branched nanocages as efficient and durable bifunctional electrocatalysts towards oxygen reduction and methanol oxidation reactions

Supplementary files

Article information

Article type
Communication
Submitted
01 sep. 2021
Accepted
04 okt. 2021
First published
06 okt. 2021

J. Mater. Chem. A, 2021,9, 23444-23450

Trimetallic PtNiCo branched nanocages as efficient and durable bifunctional electrocatalysts towards oxygen reduction and methanol oxidation reactions

H. Ma, Z. Zheng, H. Zhao, C. Shen, H. Chen, H. Li, Z. Cao, Q. Kuang, H. Lin and Z. Xie, J. Mater. Chem. A, 2021, 9, 23444 DOI: 10.1039/D1TA07488A

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