Boride-derived oxygen-evolution catalysts.
Boride-derived oxygen-evolution catalysts.
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硼化物衍生的析氧催化剂
DOI:
10.1038/s41467-021-26307-7
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发表时间:
2021-10-19
影响因子:
16.6
通讯作者:
Liang H
中科院分区:
文献类型:
--
作者:
Wang N;Xu A;Ou P;Hung SF;Ozden A;Lu YR;Abed J;Wang Z;Yan Y;Sun MJ;Xia Y;Han M;Han J;Yao K;Wu FY;Chen PH;Vomiero A;Seifitokaldani A;Sun X;Sinton D;Liu Y;Sargent EH;Liang H
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/cm2in 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 C2H4electrosynthesis at current density 200 mA/cm2for over 80 h.
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影响因子:
3.7
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通讯作者:
Furthmuller, J
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Exner, Kai S.
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通讯作者:
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通讯作者:
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