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Title: Highly active Pt/MoC and Pt/TiC catalysts for the low-temperature water-gas shift reaction: Effects of the carbide metal/carbon ratio on the catalyst performance

Abstract

We present that Pt/MoC and Pt/TiC(001) are excellent catalysts for the low-temperature water-gas shift (WGS, CO + H 2O → H 2 + CO 2) reaction. They exhibit high-activity, stability and selectivity. The highest catalytic activities are seen for small coverages of Pt on the carbide substrates. Synergistic effects at the metal-carbide interface produce an enhancement in chemical activity with respect to pure Pt, MoC and TiC. A clear correlation is found between the ability of the Pt/MoC and Pt/TiC(001) surfaces to partially dissociate water and their catalytic activity for the WGS reaction. Finally, an overall comparison of the results for Pt/MoC and Pt/Mo 2C(001) indicates that the metal/carbon ratio in the carbide support can have a strong influence in the stability and selectivity of WGS catalysts and is a parameter that must be taken into consideration when designing these systems.

Authors:
 [1];  [2];  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Department
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Department; Central University of Venezuela (Venezuela). Faculty of Science
  3. Central University of Venezuela (Venezuela). Faculty of Science
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1376160
Alternate Identifier(s):
OSTI ID: 1414786
Report Number(s):
BNL-114117-2017-JA
Journal ID: ISSN 0920-5861; R&D Project: CO040; KC0302010
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Catalysis Today
Additional Journal Information:
Journal Volume: 289; Journal ID: ISSN 0920-5861
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Water; Water-gas shift; Hydrogen production; Platinum; Molybdenum carbide; Titanium carbide

Citation Formats

Rodriguez, José A., Ramírez, Pedro J., and Gutierrez, Ramón A. Highly active Pt/MoC and Pt/TiC catalysts for the low-temperature water-gas shift reaction: Effects of the carbide metal/carbon ratio on the catalyst performance. United States: N. p., 2016. Web. doi:10.1016/j.cattod.2016.09.020.
Rodriguez, José A., Ramírez, Pedro J., & Gutierrez, Ramón A. Highly active Pt/MoC and Pt/TiC catalysts for the low-temperature water-gas shift reaction: Effects of the carbide metal/carbon ratio on the catalyst performance. United States. doi:10.1016/j.cattod.2016.09.020.
Rodriguez, José A., Ramírez, Pedro J., and Gutierrez, Ramón A. Tue . "Highly active Pt/MoC and Pt/TiC catalysts for the low-temperature water-gas shift reaction: Effects of the carbide metal/carbon ratio on the catalyst performance". United States. doi:10.1016/j.cattod.2016.09.020. https://www.osti.gov/servlets/purl/1376160.
@article{osti_1376160,
title = {Highly active Pt/MoC and Pt/TiC catalysts for the low-temperature water-gas shift reaction: Effects of the carbide metal/carbon ratio on the catalyst performance},
author = {Rodriguez, José A. and Ramírez, Pedro J. and Gutierrez, Ramón A.},
abstractNote = {We present that Pt/MoC and Pt/TiC(001) are excellent catalysts for the low-temperature water-gas shift (WGS, CO + H2O → H2 + CO2) reaction. They exhibit high-activity, stability and selectivity. The highest catalytic activities are seen for small coverages of Pt on the carbide substrates. Synergistic effects at the metal-carbide interface produce an enhancement in chemical activity with respect to pure Pt, MoC and TiC. A clear correlation is found between the ability of the Pt/MoC and Pt/TiC(001) surfaces to partially dissociate water and their catalytic activity for the WGS reaction. Finally, an overall comparison of the results for Pt/MoC and Pt/Mo2C(001) indicates that the metal/carbon ratio in the carbide support can have a strong influence in the stability and selectivity of WGS catalysts and is a parameter that must be taken into consideration when designing these systems.},
doi = {10.1016/j.cattod.2016.09.020},
journal = {Catalysis Today},
number = ,
volume = 289,
place = {United States},
year = {Tue Sep 20 00:00:00 EDT 2016},
month = {Tue Sep 20 00:00:00 EDT 2016}
}

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