过电位
塔菲尔方程
表面改性
二硫化钼
杂原子
催化作用
钴
电化学
反应性(心理学)
电催化剂
化学
惰性
无机化学
氧化还原
材料科学
组合化学
电极
物理化学
有机化学
冶金
替代医学
病理
医学
戒指(化学)
作者
Gamze Yilmaz,Tong Yang,Yonghua Du,Xiaojiang Yu,Yuan Ping Feng,Lei Shen,Ghim Wei Ho
标识
DOI:10.1002/advs.201900140
摘要
The design of MoS2-based electrocatalysts with exceptional reactivity and robustness remains a challenge due to thermodynamic instability of active phases and catalytic passiveness of basal planes. This study details a viable in situ reconstruction of zinc-nitrogen coordinated cobalt-molybdenum disulfide from structure directing metal-organic framework (MOF) to constitute specific heteroatomic coordination and surface ligand functionalization. Comprehensive experimental spectroscopic studies and first-principle calculations reveal that the rationally designed electron-rich centers warrant efficient charge injection to the inert MoS2 basal planes and augment the electronic structure of the inactive sites. The zinc-nitrogen coordinated cobalt-molybdenum disulfide shows exceptional catalytic activity and stability toward the hydrogen evolution reaction with a low overpotential of 72.6 mV at -10 mA cm-2 and a small Tafel slope of 37.6 mV dec-1. The present study opens up a new opportunity to stimulate catalytic activity of the in-plane MoS2 basal domains for enhanced electrochemistry and redox reactivity through a "molecular reassembly-to-heteroatomic coordination and surface ligand functionalization" based on highly adaptable MOF template.
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