RT Journal Article
SR Electronic
T1 O-coordinated W-Mo dual-atom catalyst for pH-universal electrocatalytic hydrogen evolution
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP eaba6586
DO 10.1126/sciadv.aba6586
VO 6
IS 23
A1 Yang, Yang
A1 Qian, Yumin
A1 Li, Haijing
A1 Zhang, Zhenhua
A1 Mu, Yuewen
A1 Do, David
A1 Zhou, Bo
A1 Dong, Jing
A1 Yan, Wenjun
A1 Qin, Yong
A1 Fang, Li
A1 Feng, Renfei
A1 Zhou, Jigang
A1 Zhang, Peng
A1 Dong, Juncai
A1 Yu, Guihua
A1 Liu, Yuanyue
A1 Zhang, Xianming
A1 Fan, Xiujun
YR 2020
UL http://advances.sciencemag.org/content/6/23/eaba6586.abstract
AB 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.