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 SintonYongchang Liu*, Edward H. Sargent, Hongyan Liang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

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.

Original languageEnglish
Article number6089
JournalNature Communications
Volume12
Issue number1
DOIs
StatePublished - Dec 2021

Fingerprint

Dive into the research topics of 'Boride-derived oxygen-evolution catalysts'. Together they form a unique fingerprint.

Cite this