Mesoporous Pt@Pt-skin Pt3Ni core-shell framework nanowire electrocatalyst for efficient oxygen reduction

Hui Jin, Zhewei Xu, Zhi-Yi Hu, Zhiwen Yin, Zhao Wang, Zhao Deng, Ping Wei, Shihao Feng, Shunhong Dong, Jinfeng Liu, Sicheng Luo, Zhaodong Qiu, Liang Zhou, Liqiang Mai, Bao-Lian Su, Dongyuan Zhao and Yong Liu ()
Additional contact information
Hui Jin: Wuhan University of Technology
Zhewei Xu: Wuhan University of Technology
Zhi-Yi Hu: Wuhan University of Technology
Zhiwen Yin: Wuhan University of Technology
Zhao Wang: Wuhan University of Technology
Zhao Deng: Wuhan University of Technology
Ping Wei: Wuhan University of Technology
Shihao Feng: Wuhan University of Technology
Shunhong Dong: Wuhan University of Technology
Jinfeng Liu: Wuhan University of Technology
Sicheng Luo: Wuhan University of Technology
Zhaodong Qiu: Wuhan University of Technology
Liang Zhou: Wuhan University of Technology
Liqiang Mai: Wuhan University of Technology
Bao-Lian Su: Wuhan University of Technology
Dongyuan Zhao: Fudan University
Yong Liu: Wuhan University of Technology

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract The design of Pt-based nanoarchitectures with controllable compositions and morphologies is necessary to enhance their electrocatalytic activity. Herein, we report a rational design and synthesis of anisotropic mesoporous Pt@Pt-skin Pt3Ni core-shell framework nanowires for high-efficient electrocatalysis. The catalyst has a uniform core-shell structure with an ultrathin atomic-jagged Pt nanowire core and a mesoporous Pt-skin Pt3Ni framework shell, possessing high electrocatalytic activity, stability and Pt utilisation efficiency. For the oxygen reduction reaction, the anisotropic mesoporous Pt@Pt-skin Pt3Ni core-shell framework nanowires demonstrated exceptional mass and specific activities of 6.69 A/mgpt and 8.42 mA/cm2 (at 0.9 V versus reversible hydrogen electrode), and the catalyst exhibited high stability with negligible activity decay after 50,000 cycles. The mesoporous Pt@Pt-skin Pt3Ni core-shell framework nanowire configuration combines the advantages of three-dimensional open mesopore molecular accessibility and compressive Pt-skin surface strains, which results in more catalytically active sites and weakened chemisorption of oxygenated species, thus boosting its catalytic activity and stability towards electrocatalysis.

Date: 2023
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DOI: 10.1038/s41467-023-37268-4

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