Loading…

Oxygen vacancy-induced efficient hydrogen spillover in Ni17W3/WO3−x/MoO3−x for a superior pH-universal hydrogen evolution reaction

Searching for a stable and efficient electrocatalyst for the hydrogen evolution reaction is still challenging, especially under a wider pH operation condition. In this study, a multicomponent Ni17W3/MoO3−x/WO3−x catalyst was designed and synthesized, in which the unique hierarchical structure of ent...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2024-05, Vol.12 (19), p.11563-11570
Main Authors: Sun, Yiqing, Bao, Yiwei, Yin, Di, Bu, Xiuming, Zhang, Yuxuan, Kaihang Yue, Xiaoshuang Qi, Cai, Ziyan, Li, Yongqiang, Hu, Xiulan, Ho, Johnny C, Wang, Xianying
Format: Article
Language:English
Subjects:
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Searching for a stable and efficient electrocatalyst for the hydrogen evolution reaction is still challenging, especially under a wider pH operation condition. In this study, a multicomponent Ni17W3/MoO3−x/WO3−x catalyst was designed and synthesized, in which the unique hierarchical structure of entangled nanorods confined in a polyhedral framework ensures the maximum utilization of active sites. Significantly, electrochemical performance can be regulated by adjusting the oxygen vacancy concentration of the metal support. Combined with various characterization techniques, we discovered that abundant oxygen vacancies in the MoO3−x/WO3−x support not only significantly enhanced the hydrogen insertion/extraction kinetics in the metal oxide but also increased the hydration capacity, resulting in an efficient hydrogen adsorption/transfer/desorption kinetics on the Ni17W3/MoO3−x/WO3−x surface and interface. As a result, the fabricated electrocatalyst exhibits an ultralow overpotential of 16, 42, and 14 mV at 10 mA cm−2 in alkaline, neutral, and acid electrolytes, respectively. Our work proves the important role of metal oxide supports in the hydrogen spillover process.
ISSN:2050-7488
2050-7496
DOI:10.1039/d4ta00729h