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In-Situ HP-stm and Operando ec-stm Studies of Heterogeneous Catalysis at Interfaces

Chinese Journal of Structural Chemistry 2022年第10期41卷 29-44页

作者： Lei Xie Chaoqin Huang Zhaofeng Liang Hongbing Wang Zheng Jiang Fei Song Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201000China University of Chinese Academy of Sciences Bejing 101000China

Heterogeneous catalysis taking place at solid interfaces plays a crucial role not only in industrial chemical production, energy conversion but also in fundamental research. The dynamic evolution of surface morphology and composition requires full understanding especially under realistic reaction conditions. To this end, conventional scanning tunneling microscopy(stm) has been integrated with high pressure cell and electrochemical cell, forming high pressure(HP) stm and electrochemical(ec) stm for the in-situ/operando characterization at solid-gas and solid-liquid interfaces with atomic resolution, respectively. In this review, we attempt to give a brief introduction to the development and working principle of these two techniques and subsequently summarize several representative progresses in recent days. The dynamic changes in active sites, surface reconstruction, absorbates alteration and products formation are directly characterized in a combination with other surface sensitive technologies. The correlation between surface structures and catalytic performance as well as the underlying mechanism can thus be unraveled, which provides insights into the rational design and optimization of catalysts.

关键词： HP-stm ec-stm heterogeneous catalysis in-situ operando interfaces

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Application of Scanning Tunneling Microscopy in Electrocatalysis and Electrochemistry

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Electrochemical Energy Reviews 2021年第2期4卷 249-268页

作者： Haifeng Feng Xun Xu Yi Du Shi Xue Dou Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongWollongongNSW 2500Australia BUAA‑UOW Joint Research Centre Beihang UniversityHaidian DistrictBeijing 100191China

Scanning tunneling microscopy(stm)has gained increasing attention in the field of electrocatalysis due to its ability to reveal electrocatalyst surface structures down to the atomic level in either ultra-high-vacuum(UHV)or harsh electrochemical *** detailed knowledge of surface structures,surface electronic structures,surface active sites as well as the interaction between surface adsorbates and electrocatalysts is highly beneficial in the study of electrocatalytic mechanisms and for the rational design of *** on this,this review will discuss the application of stm in the characterization of electrocatalyst surfaces and the investigation of electrochemical interfaces between electrocatalyst surfaces and *** on different operating conditions,UHV-stm and stm in electrochemical environments(ec-stm)are discussed *** review will also present emerging techniques including high-speed ec-stm,scanning noise microscopy and tip-enhanced Raman spectroscopy.

关键词： Electrochemist Electrocatalyst stm ec-stm

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