Results
Title

Facet‐Dependent Oxidative Strong Metal‐Support Interactions of Palladium–TiO<sub>2</sub> Determined by In Situ Transmission Electron Microscopy.

Authors

Tang, Min; Li, Songda; Chen, Shiyuan; Ou, Yang; Hiroaki, Matsumoto; Yuan, Wentao; Zhu, Beien; Yang, Hangsheng; Gao, Yi; Zhang, Ze; Wang, Yong

Abstract

The strong metal‐support interaction (SMSI) is widely used in supported metal catalysts and extensive studies have been performed to understand it. Although considerable progress has been achieved, the surface structure of the support, as an important influencing factor, is usually ignored. We report a facet‐dependent SMSI of Pd‐TiO2 in oxygen by using in situ atmospheric pressure TEM. Pd NPs supported on TiO2 (101) and (100) surfaces showed encapsulation. In contrast, no such cover layer was observed in Pd‐TiO2 (001) catalyst under the same conditions. This facet‐dependent SMSI, which originates from the variable surface structure of the support, was demonstrated in a probe reaction of methane combustion catalyzed by Pd‐TiO2. Our discovery of the oxidative facet‐dependent SMSI gives direct evidence of the important role of the support surface structure in SMSI and provides a new way to tune the interaction between metal NPs and the support as well as catalytic activity.

Subjects

TRANSMISSION electron microscopy; SURFACE structure; METAL catalysts; ATMOSPHERIC pressure; CATALYTIC activity; STEAM reforming

Publication

Angewandte Chemie, 2021, Vol 133, Issue 41, p22513

ISSN

0044-8249

Publication type

Academic Journal

DOI

10.1002/ange.202106805