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Title: Reversible oxidation and reduction of gold-supported iron oxide islands at room temperature

Abstract

Monolayer iron oxides grown on metal substrates have widely been used as model systems in heterogeneous catalysis. By means of ambient-pressure scanning tunneling microscopy (AP-STM), we studied the in situ oxidation and reduction of FeO(111) grown on Au(111) by oxygen (O2) and carbon monoxide (CO), respectively. Oxygen dislocation lines present on FeO islands are highly active for O2 dissociation. X-ray photoelectron spectroscopy measurements distinctly reveal the reversible oxidation and reduction of FeO islands after sequential exposure to O2 and CO. Here, our AP-STM results show that excess O atoms can be further incorporated on dislocation lines and react with CO, whereas the CO is not strong enough to reduce the FeO supported on Au(111) that is essential to retain the activity of oxygen dislocation lines.

Authors:
 [1];  [2];  [1];  [3];  [1]; ORCiD logo [4]; ORCiD logo [1]
  1. Nanjing Univ. of Science and Technology, Xiaolingwei (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); State Univ. of New York, Binghamton, NY (United States)
  3. Xi’an Jiaotong Univ. (China)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Integrated Mesoscale Architectures for Sustainable Catalysis (IMASC); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation of Jiangsu Province
OSTI Identifier:
1614693
Alternate Identifier(s):
OSTI ID: 1600585
Report Number(s):
BNL-213814-2020-JAAM
Journal ID: ISSN 0021-9606; TRN: US2104965
Grant/Contract Number:  
SC0012704; SC0012573; BK20181297
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 152; Journal Issue: 7; Journal ID: ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; carbon monoxide; catalyst; scanning tunneling microscopy; catalysis; density functional theory; temperature programmed desorption; X-ray photoelectron spectroscopy; oxidation; surface science

Citation Formats

Jiang, Yixuan, Zhu, Yaguang, Zhou, Dechun, Jiang, Zhao, Si, Nan, Stacchiola, Dario, and Niu, Tianchao. Reversible oxidation and reduction of gold-supported iron oxide islands at room temperature. United States: N. p., 2020. Web. doi:10.1063/1.5136279.
Jiang, Yixuan, Zhu, Yaguang, Zhou, Dechun, Jiang, Zhao, Si, Nan, Stacchiola, Dario, & Niu, Tianchao. Reversible oxidation and reduction of gold-supported iron oxide islands at room temperature. United States. https://doi.org/10.1063/1.5136279
Jiang, Yixuan, Zhu, Yaguang, Zhou, Dechun, Jiang, Zhao, Si, Nan, Stacchiola, Dario, and Niu, Tianchao. Wed . "Reversible oxidation and reduction of gold-supported iron oxide islands at room temperature". United States. https://doi.org/10.1063/1.5136279. https://www.osti.gov/servlets/purl/1614693.
@article{osti_1614693,
title = {Reversible oxidation and reduction of gold-supported iron oxide islands at room temperature},
author = {Jiang, Yixuan and Zhu, Yaguang and Zhou, Dechun and Jiang, Zhao and Si, Nan and Stacchiola, Dario and Niu, Tianchao},
abstractNote = {Monolayer iron oxides grown on metal substrates have widely been used as model systems in heterogeneous catalysis. By means of ambient-pressure scanning tunneling microscopy (AP-STM), we studied the in situ oxidation and reduction of FeO(111) grown on Au(111) by oxygen (O2) and carbon monoxide (CO), respectively. Oxygen dislocation lines present on FeO islands are highly active for O2 dissociation. X-ray photoelectron spectroscopy measurements distinctly reveal the reversible oxidation and reduction of FeO islands after sequential exposure to O2 and CO. Here, our AP-STM results show that excess O atoms can be further incorporated on dislocation lines and react with CO, whereas the CO is not strong enough to reduce the FeO supported on Au(111) that is essential to retain the activity of oxygen dislocation lines.},
doi = {10.1063/1.5136279},
journal = {Journal of Chemical Physics},
number = 7,
volume = 152,
place = {United States},
year = {Wed Feb 19 00:00:00 EST 2020},
month = {Wed Feb 19 00:00:00 EST 2020}
}

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