Controlling Reaction Selectivity through the Surface Termination of Perovskite Catalysts
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of California, Riverside, CA (United States)
- Tennessee Technological Univ., Cookeville, TN (United States)
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
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