电场
异质结
氢
工作(物理)
动力学
化学
活动站点
材料科学
化学工程
光电子学
物理
催化作用
热力学
有机化学
量子力学
工程类
生物化学
作者
Ding Chen,Ruihu Lu,Ruohan Yu,Yuhang Dai,Hongyu Zhao,Dulan Wu,Pengyan Wang,Jiawei Zhu,Zonghua Pu,Lei Chen,Jun Yu,Shichun Mu
标识
DOI:10.1002/anie.202208642
摘要
Theoretical calculations unveil that the formation of Os-OsSe2 heterostructures with neutralized work function (WF) perfectly balances the electronic state between strong (Os) and weak (OsSe2 ) adsorbents and bidirectionally optimizes the hydrogen evolution reaction (HER) activity of Os sites, significantly reducing thermodynamic energy barrier and accelerating kinetics process. Then, heterostructural Os-OsSe2 is constructed for the first time by a molten salt method and confirmed by in-depth structural characterization. Impressively, due to highly active sites endowed by the charge balance effect, Os-OsSe2 exhibits ultra-low overpotentials for HER in both acidic (26 mV @ 10 mA cm-2 ) and alkaline (23 mV @ 10 mA cm-2 ) media, surpassing commercial Pt catalysts. Moreover, the solar-to-hydrogen device assembled with Os-OsSe2 further highlights its potential application prospects. Profoundly, this special heterostructure provides a new model for rational selection of heterocomponents.
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