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

Abstract

Although well known in the material science field, surface reconstruction of perovskites has not been implemented in heterogeneous catalysis. In this work, we employ multiple surface sensitive techniques to characterize the surface reconstruction of SrTiO3 (STO) after thermal pretreatment (Sr-enrichment) and chemical etching (Ti-enrichment). We show, using the conversion of 2-propanol as a probe reaction, that the surface reconstruction of STO can be controlled to greatly tune catalytic acid/base properties and consequently the reaction selectivities in a wide range, which are inaccessible using single metal oxides, either SrO or TiO2. Density functional theory (DFT) calculations well explain the selectivity tuning and reaction mechanism on differently reconstructed surfaces of STO. Similar catalytic tunability is also observed on BaZrO3, highlighting the generality of the finding from this work.

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [4];  [2];  [3]; ORCiD logo [1]
  1. Chemical Sciences Division and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge TN 37831 USA
  2. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge TN 37831 USA
  3. Department of Chemistry, University of California, Riverside CA 92521 USA
  4. Department of Chemical Engineering, Tennessee Technological University, Cookeville TN 38505 USA
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1400188
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 56; Journal Issue: 33
Country of Publication:
United States
Language:
English

Citation Formats

Polo-Garzon, Felipe, Yang, Shi-Ze, Fung, Victor, Foo, Guo Shiou, Bickel, Elizabeth E., Chisholm, Matthew F., Jiang, De-en, and Wu, Zili. Controlling Reaction Selectivity through the Surface Termination of Perovskite Catalysts. United States: N. p., 2017. Web. doi:10.1002/anie.201704656.
Polo-Garzon, Felipe, Yang, Shi-Ze, Fung, Victor, Foo, Guo Shiou, Bickel, Elizabeth E., Chisholm, Matthew F., Jiang, De-en, & Wu, Zili. Controlling Reaction Selectivity through the Surface Termination of Perovskite Catalysts. United States. doi:10.1002/anie.201704656.
Polo-Garzon, Felipe, Yang, Shi-Ze, Fung, Victor, Foo, Guo Shiou, Bickel, Elizabeth E., Chisholm, Matthew F., Jiang, De-en, and Wu, Zili. Wed . "Controlling Reaction Selectivity through the Surface Termination of Perovskite Catalysts". United States. doi:10.1002/anie.201704656.
@article{osti_1400188,
title = {Controlling Reaction Selectivity through the Surface Termination of Perovskite Catalysts},
author = {Polo-Garzon, Felipe and Yang, Shi-Ze and Fung, Victor and Foo, Guo Shiou and Bickel, Elizabeth E. and Chisholm, Matthew F. and Jiang, De-en and Wu, Zili},
abstractNote = {Although well known in the material science field, surface reconstruction of perovskites has not been implemented in heterogeneous catalysis. In this work, we employ multiple surface sensitive techniques to characterize the surface reconstruction of SrTiO3 (STO) after thermal pretreatment (Sr-enrichment) and chemical etching (Ti-enrichment). We show, using the conversion of 2-propanol as a probe reaction, that the surface reconstruction of STO can be controlled to greatly tune catalytic acid/base properties and consequently the reaction selectivities in a wide range, which are inaccessible using single metal oxides, either SrO or TiO2. Density functional theory (DFT) calculations well explain the selectivity tuning and reaction mechanism on differently reconstructed surfaces of STO. Similar catalytic tunability is also observed on BaZrO3, highlighting the generality of the finding from this work.},
doi = {10.1002/anie.201704656},
journal = {Angewandte Chemie (International Edition)},
number = 33,
volume = 56,
place = {United States},
year = {Wed Jul 19 00:00:00 EDT 2017},
month = {Wed Jul 19 00:00:00 EDT 2017}
}