Boride-derived oxygen-evolution catalysts

Ning Wang, Aoni Xu, Pengfei Ou, Sung-Fu Hung, Adnan Ozden, Ying-Rui Lu, Jehad Abed, Ziyun Wang, Yu Yan, Meng-Jia Sun, Yujian Xia, Mei Han, Jingrui Han, Kaili Yao, Feng-Yi Wu, Pei-Hsuan Chen, Alberto Vomiero, Ali Seifitokaldani, Xuhui Sun, David Sinton, Yongchang Liu (), Edward H. Sargent () and Hongyan Liang ()
Additional contact information
Ning Wang: Tianjin University
Aoni Xu: University of Toronto
Pengfei Ou: University of Toronto
Sung-Fu Hung: National Chiao Tung University
Adnan Ozden: University of Toronto
Ying-Rui Lu: National Synchrotron Radiation Research Center
Jehad Abed: University of Toronto
Ziyun Wang: University of Toronto
Yu Yan: University of Toronto
Meng-Jia Sun: University of Toronto
Yujian Xia: Soochow University
Mei Han: Tianjin University
Jingrui Han: Tianjin University
Kaili Yao: Tianjin University
Feng-Yi Wu: National Chiao Tung University
Pei-Hsuan Chen: National Chiao Tung University
Alberto Vomiero: Luleå University of Technology
Ali Seifitokaldani: McGill University
Xuhui Sun: Soochow University
David Sinton: National Chiao Tung University
Yongchang Liu: Tianjin University
Edward H. Sargent: University of Toronto
Hongyan Liang: Tianjin University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Metal borides/borates have been considered promising as oxygen evolution reaction catalysts; however, to date, there is a dearth of evidence of long-term stability at practical current densities. Here we report a phase composition modulation approach to fabricate effective borides/borates-based catalysts. We find that metal borides in-situ formed metal borates are responsible for their high activity. This knowledge prompts us to synthesize NiFe-Boride, and to use it as a templating precursor to form an active NiFe-Borate catalyst. This boride-derived oxide catalyzes oxygen evolution with an overpotential of 167 mV at 10 mA/cm2 in 1 M KOH electrolyte and requires a record-low overpotential of 460 mV to maintain water splitting performance for over 400 h at current density of 1 A/cm2. We couple the catalyst with CO reduction in an alkaline membrane electrode assembly electrolyser, reporting stable C2H4 electrosynthesis at current density 200 mA/cm2 for over 80 h.

Date: 2021
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DOI: 10.1038/s41467-021-26307-7

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