整改
催化作用
化学
工作职能
酞菁
部分
金属
Atom(片上系统)
纳米技术
结晶学
材料科学
立体化学
物理
电压
有机化学
量子力学
嵌入式系统
计算机科学
作者
Zechao Zhuang,Lixue Xia,Jiazhao Huang,Peng Zhu,Yong Li,Chenliang Ye,Minggang Xia,Ruohan Yu,Zhiquan Lang,Jiexin Zhu,Lirong Zheng,Yu Wang,Tianyou Zhai,Yan Zhao,Shiqiang Wei,Jun Li,Dingsheng Wang,Yadong Li
标识
DOI:10.1002/anie.202212335
摘要
Fine-tuning single-atom catalysts (SACs) to surpass their activity limit remains challenging at their atomic scale. Herein, we exploit p-type semiconducting character of SACs having a metal center coordinated to nitrogen donors (MeNx ) and rectify their local charge density by an n-type semiconductor support. With iron phthalocyanine (FePc) as a model SAC, introducing an n-type gallium monosulfide that features a low work function generates a space-charged region across the junction interface, and causes distortion of the FeN4 moiety and spin-state transition in the FeII center. This catalyst shows an over two-fold higher specific oxygen-reduction activity than that of pristine FePc. We further employ three other n-type metal chalcogenides of varying work function as supports, and discover a linear correlation between the activities of the supported FeN4 and the rectification degrees, which clearly indicates that SACs can be continuously tuned by this rectification strategy.
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