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Title: Controlling Reaction Selectivity through the Surface Termination of Perovskite Catalysts

Journal Article · · Angewandte Chemie (International Edition)

Abstract Although perovskites have been widely used in catalysis, tuning of their surface termination to control reaction selectivity has not been well established. In this study, we employed multiple surface‐sensitive techniques to characterize the surface termination (one aspect of surface reconstruction) of SrTiO 3 (STO) after thermal pretreatment (Sr enrichment) and chemical etching (Ti enrichment). We show, by using the conversion of 2‐propanol as a probe reaction, that the surface termination of STO can be controlled to greatly tune catalytic acid/base properties and consequently the reaction selectivity over a wide range, which is not possible with single‐metal oxides, either SrO or TiO 2 . Density functional theory (DFT) calculations explain well the selectivity tuning and reaction mechanism on STO with different surface termination. Similar catalytic tunability was also observed on BaZrO 3 , thus highlighting the generality of the findings of this study.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1399923
Alternate ID(s):
OSTI ID: 1378301
Journal Information:
Angewandte Chemie (International Edition), Vol. 56, Issue 33; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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Cited By (5)

The Facet Structure and Photochemical Reactivity of Arbitrarily Oriented Strontium Titanate Surfaces journal July 2019
Impact of Surface Composition of SrTiO 3 Catalysts for Oxidative Coupling of Methane journal April 2019
Insights into Crystal Facets of Perovskite SrSnO 3 as High‐Performance Photocatalysts toward Environmental Remediation journal August 2018
Enhancement of the SrTiO 3 Surface Reactivity by Exposure to Electric Fields journal May 2019
Perovskite-Derived Pt–Ni/Zn(Ni)TiO3/SiO2 Catalyst for Propane Dehydrogenation to Propene journal June 2019

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