O-coordinated W-Mo dual-atom catalyst for pH-universal electrocatalytic hydrogen evolution

Yang Yang, Yang Yang, Yumin Qian, Haijing Li, Zhenhua Zhang, Yuewen Mu, David Do, Bo Zhou, Jing Dong, Wenjun Yan, Yong Qin, Li Fang, Renfei Feng, Jigang Zhou, Peng Zhang, Juncai Dong, Guihua Yu, Yuanyue Liu, Xianming Zhang*, Xianming Zhang*Xiujun Fan*, Xiujun Fan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

259 Citations (Scopus)

Abstract

Single-atom catalysts (SACs) maximize the utility efficiency of metal atoms and offer great potential for hydrogen evolution reaction (HER). Bimetal atom catalysts are an appealing strategy in virtue of the synergistic interaction of neighboring metal atoms, which can further improve the intrinsic HER activity beyond SACs. However, the rational design of these systems remains conceptually challenging and requires in-depth research both experimentally and theoretically. Here, we develop a dual-atom catalyst (DAC) consisting of O-coordinated W-Mo heterodimer embedded in N-doped graphene (W1Mo1-NG), which is synthesized by controllable self-assembly and nitridation processes. In W1Mo1-NG, the O-bridged W-Mo atoms are anchored in NG vacancies through oxygen atoms with W-O-Mo-O-C configuration, resulting in stable and finely distribution. The W1Mo1-NG DAC enables Pt-like activity and ultrahigh stability for HER in pH-universal electrolyte. The electron delocalization of W-O-Mo-O-C configuration provides optimal adsorption strength of H and boosts the HER kinetics, thereby notably promoting the intrinsic activity.

Original languageEnglish
Article numberEABA6586
JournalScience advances
Volume6
Issue number23
DOIs
Publication statusPublished - Jun 2020
Externally publishedYes

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