Phase Coexistence and Structural Dynamics of Redox Metal Catalysts Revealed by Operando TEM.

Advanced Materials
Xing HuangMarc-Georg Willinger

Abstract

Metal catalysts play an important role in industrial redox reactions. Although extensively studied, the state of these catalysts under operating conditions is largely unknown, and assignments of active sites remain speculative. Herein, an operando transmission electron microscopy study is presented, which interrelates the structural dynamics of redox metal catalysts to their activity. Using hydrogen oxidation on copper as an elementary redox reaction, it is revealed how the interaction between metal and the surrounding gas phase induces complex structural transformations and drives the system from a thermodynamic equilibrium toward a state controlled by the chemical dynamics. Direct imaging combined with the simultaneous detection of catalytic activity provides unparalleled structure-activity insights that identify distinct mechanisms for water formation and reveal the means by which the system self-adjusts to changes of the gas-phase chemical potential. Density functional theory calculations show that surface phase transitions are driven by chemical dynamics even when the system is far from a thermodynamic phase boundary. In a bottom-up approach, the dynamic behavior observed here for an elementary reaction is finally extended...Continue Reading

References

Oct 15, 1990·Physical Review Letters·R Feidenhans'lR L Johnson
Jan 10, 2008·Journal of the American Chemical Society·Amit A GokhaleManos Mavrikakis
Feb 23, 2012·Physical Chemistry Chemical Physics : PCCP·Tulio C R RochaRobert Schlögl
Jul 28, 2012·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Lawrence F AllardJohn Damiano
Feb 2, 2013·Physical Review Letters·Guangwen ZhouJudith C Yang
May 3, 2013·Accounts of Chemical Research·Thomas W HansenAbhaya K Datye
May 13, 2014·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Benjamin K Miller, Peter A Crozier
Mar 15, 2012·The Journal of Physical Chemistry Letters·A HellmanH Grönbeck
Mar 10, 2016·Journal of the American Chemical Society·Matteo RoiazErik Vesselli
Mar 10, 2016·Chemical Reviews·Franklin Feng Tao, Peter A Crozier
Dec 13, 2016·Journal of the American Chemical Society·Alec P LaGrowEdward D Boyes
Jul 29, 2017·Journal of the American Chemical Society·Mark T GreinerRobert Schlögl
Aug 22, 2017·Nature Communications·Lianfeng ZouGuangwen Zhou
Sep 10, 2017·Nature Communications·Zhenhua ZhangWeixin Huang
May 24, 2019·Chemical Reviews·Stephanie NitopiIb Chorkendorff
Jan 18, 2020·Nature Communications·Xianhu SunGuangwen Zhou
Jul 18, 2020·Nature Communications·Jing CaoMarc Willinger

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Citations

Sep 28, 2021·The Journal of Physical Chemistry Letters·Xianhu SunGuangwen Zhou

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