纳米片
电催化剂
材料科学
氢氧化物
电化学
氧化还原
电极
基质(水族馆)
锡
化学工程
纳米技术
无机化学
化学
物理化学
工程类
冶金
地质学
海洋学
作者
Jin X,Taehun Lee,Wilson Tamakloe,S. B. Patil,Aloysius Soon,Yong‐Mook Kang,Seong Ju Hwang
标识
DOI:10.1002/advs.202103368
摘要
Abstract A defect engineering of inorganic solids garners great deal of research activities because of its high efficacy to optimize diverse energy‐related functionalities of nanostructured materials. In this study, a novel in situ defect engineering route to maximize electrocatalytic redox activity of inorganic nanosheet is developed by using holey nanostructured substrate with strong interfacial electronic coupling. Density functional theory calculations and in situ spectroscopic analyses confirm that efficient interfacial charge transfer takes place between holey TiN and Ni−Fe‐layered double hydroxide (LDH), leading to the feedback formation of nitrogen vacancies and a maximization of cation redox activity. The holey TiN−LDH nanohybrid is found to exhibit a superior functionality as an oxygen electrocatalyst and electrode for Li−O 2 batteries compared to its non‐holey homologues. The great impact of hybridization‐driven vacancy introduction on the electrochemical performance originates from an efficient electrochemical activation of both Fe and Ni ions during electrocatalytic process, a reinforcement of interfacial electronic coupling, an increase in electrochemical active sites, and an improvement in electrocatalysis/charge‐transfer kinetics.
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