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

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-activ

SUBMITTER: Huang X 

PROVIDER: S-EPMC11469237 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature