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Title: Carbothermal synthesis of titanium oxycarbide as electrocatalyst support with high oxygen evolution reaction activity

Abstract

Carbothermal reduction of semiconducting TiO2 into highly conductive titanium oxycarbide (TiOxCy) was investigated. The thermally produced uniform carbon layer on TiO2 (Degussa P25) protects the TiO2 nanoparticles from sintering and, at the same time, supplies the carbon source for doping TiO2 with carbon. At low temperatures (e. g., 700 degrees C), carbon only substitutes part of the oxide and distorts the TiO2 lattice to form TiO2-xCx with only substitutional carbon. When the carbon-doped TiO2 is annealed at a higher temperature (1100 degrees C), x-ray diffraction and x-ray photoelectron spectroscopy results showed that TiOxCy, a solid solution of TiO and TiC, was formed, which displays different diffraction peaks and binding energies. It was shown that TiOxCy has much better oxygen revolution reaction activity than TiO2 or TiO2-xCx. Further studies showed that the TiOxCy obtained can be used as a support for metal electrocatalyst, leading to a bifunctional catalyst effective for both oxygen reduction and evolution reactions.

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1211511
DOE Contract Number:  
DE-AR0000066
Resource Type:
Journal Article
Journal Name:
Journal of Materials Research
Additional Journal Information:
Journal Volume: 28; Journal Issue: 3; Journal ID: ISSN 0884-2914
Country of Publication:
United States
Language:
English

Citation Formats

Huang, K, Li, YF, and Xing, YC. Carbothermal synthesis of titanium oxycarbide as electrocatalyst support with high oxygen evolution reaction activity. United States: N. p., 2012. Web. doi:10.1557/jmr.2012.353.
Huang, K, Li, YF, & Xing, YC. Carbothermal synthesis of titanium oxycarbide as electrocatalyst support with high oxygen evolution reaction activity. United States. doi:10.1557/jmr.2012.353.
Huang, K, Li, YF, and Xing, YC. Fri . "Carbothermal synthesis of titanium oxycarbide as electrocatalyst support with high oxygen evolution reaction activity". United States. doi:10.1557/jmr.2012.353.
@article{osti_1211511,
title = {Carbothermal synthesis of titanium oxycarbide as electrocatalyst support with high oxygen evolution reaction activity},
author = {Huang, K and Li, YF and Xing, YC},
abstractNote = {Carbothermal reduction of semiconducting TiO2 into highly conductive titanium oxycarbide (TiOxCy) was investigated. The thermally produced uniform carbon layer on TiO2 (Degussa P25) protects the TiO2 nanoparticles from sintering and, at the same time, supplies the carbon source for doping TiO2 with carbon. At low temperatures (e. g., 700 degrees C), carbon only substitutes part of the oxide and distorts the TiO2 lattice to form TiO2-xCx with only substitutional carbon. When the carbon-doped TiO2 is annealed at a higher temperature (1100 degrees C), x-ray diffraction and x-ray photoelectron spectroscopy results showed that TiOxCy, a solid solution of TiO and TiC, was formed, which displays different diffraction peaks and binding energies. It was shown that TiOxCy has much better oxygen revolution reaction activity than TiO2 or TiO2-xCx. Further studies showed that the TiOxCy obtained can be used as a support for metal electrocatalyst, leading to a bifunctional catalyst effective for both oxygen reduction and evolution reactions.},
doi = {10.1557/jmr.2012.353},
journal = {Journal of Materials Research},
issn = {0884-2914},
number = 3,
volume = 28,
place = {United States},
year = {2012},
month = {11}
}