GSTDTAP  > 地球科学
DOI10.1038/nature22355
Direct instrumental identification of catalytically active surface sites
Pfisterer, Jonas H. K.1; Liang, Yunchang1,2,3; Schneider, Oliver2; Bandarenka, Aliaksandr S.1,3,4
2017-09-07
发表期刊NATURE
ISSN0028-0836
EISSN1476-4687
出版年2017
卷号549期号:7670页码:74-+
文章类型Article
语种英语
国家Germany
英文摘要

The activity of heterogeneous catalysts-which are involved in some 80 per cent of processes in the chemical and energy industries-is determined by the electronic structure of specific surface sites that offer optimal binding of reaction intermediates. Directly identifying and monitoring these sites during a reaction should therefore provide insight that might aid the targeted development of heterogeneous catalysts and electrocatalysts (those that participate in electrochemical reactions) for practical applications. The invention of the scanning tunnelling microscope (STM)(1,2) and the electrochemical STM3,4 promised to deliver such imaging capabilities, and both have indeed contributed greatly to our atomistic understanding of heterogeneous catalysis(5-8). But although the STM has been used to probe and initiate surface reactions(9,10), and has even enabled local measurements of reactivity in some systems(11-13), it is not generally thought to be suited to the direct identification of catalytically active surface sites under reaction conditions. Here we demonstrate, however, that common STMs can readily map the catalytic activity of surfaces with high spatial resolution: we show that by monitoring relative changes in the tunnelling current noise, active sites can be distinguished in an almost quantitative fashion according to their ability to catalyse the hydrogen-evolution reaction or the oxygen-reduction reaction. These data allow us to evaluate directly the importance and relative contribution to overall catalyst activity of different defects and sites at the boundaries between two materials. With its ability to deliver such information and its ready applicability to different systems, we anticipate that our method will aid the rational design of heterogeneous catalysts.


领域地球科学 ; 气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000409388700035
WOS关键词OXYGEN REDUCTION REACTION ; SCANNING-TUNNELING-MICROSCOPY ; HYDROGEN EVOLUTION REACTION ; SINGLE-CRYSTAL ELECTRODES ; HIGH-INDEX PLANES ; PLATINUM ; REACTIVITY ; ELECTROCATALYSIS ; DEPOSITION ; CATALYSIS
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/202742
专题地球科学
资源环境科学
气候变化
作者单位1.Tech Univ Munich, Phys Energy Convers & Storage, Phys Dept, James Franck Str 1, D-85748 Garching, Germany;
2.Tech Univ Munich, Inst Informat 6, Schleissheimerstr 90a, D-85748 Garching, Germany;
3.NIM, Schellingstr 4, D-80799 Munich, Germany;
4.TUM, Catalysis Res Ctr, Ernst Otto Fischer Str 1, D-85748 Garching, Germany
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GB/T 7714
Pfisterer, Jonas H. K.,Liang, Yunchang,Schneider, Oliver,et al. Direct instrumental identification of catalytically active surface sites[J]. NATURE,2017,549(7670):74-+.
APA Pfisterer, Jonas H. K.,Liang, Yunchang,Schneider, Oliver,&Bandarenka, Aliaksandr S..(2017).Direct instrumental identification of catalytically active surface sites.NATURE,549(7670),74-+.
MLA Pfisterer, Jonas H. K.,et al."Direct instrumental identification of catalytically active surface sites".NATURE 549.7670(2017):74-+.
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