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Wang, Ning; Xu, Aoni; Ou, Pengfei; Hung, Sung-Fu; Ozden, Adnan; Lu, Ying-Rui; Abed, Jehad; Wang, Ziyun; Yan, Yu; Sun, Meng-Jia; Xia, Yujian; Han, Mei; Han, Jingrui; Yao, Kaili; Wu, Feng-Yi; Chen, Pei-Hsuan; Vomiero, Alberto; Seifitokaldani, Ali; Sun, Xuhui; Sinton, David; Liu, Yongchang; Sargent, Edward H; Liang, Hongyan
Nature communications, 10/2021, Letnik: 12, Številka: 1Journal Article
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/cm 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/cm . We couple the catalyst with CO reduction in an alkaline membrane electrode assembly electrolyser, reporting stable C H electrosynthesis at current density 200 mA/cm for over 80 h.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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