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This content will become publicly available on April 23, 2019

Title: Pt-modified TaC as an efficient electrocatalyst for ethanol oxidation in acid and alkaline electrolytes

Ethanol is an ideal fuel in low-temperature fuel cells. The ethanol oxidation reaction (EOR) on platinum-modified tantalum carbide (TaC) has been investigated using both model thin films and powder catalysts. The results demonstrate that the 1.5 wt% Pt-modified TaC catalyst shows enhanced EOR activity compared to Pt. In-situ infrared reflection absorption spectroscopy (IRRAS) study reveals that the Pt surface is less poisoned by EOR intermediates and a higher CO2 selectivity (7~9%) is achieved on the 1.5 wt% Pt/TaC catalyst, compared to the 40 wt% Pt/C. Density functional theory (DFT) calculations reveal that the binding energies of EOR intermediates on the Pt/TaC(111) surface are weaker than on Pt(111), suggesting an enhanced poison-tolerance from the adsorption of these intermediates. The combined experimental and theoretical investigations indicate that Pt/TaC is a promising electrocatalyst for EOR.
Authors:
 [1] ;  [2] ;  [3] ; ORCiD logo [4]
  1. Xi'an Jiaotong Univ., Xi'an (China); Columbia Univ., New York, NY (United States)
  2. Columbia Univ., New York, NY (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Columbia Univ., New York, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Report Number(s):
BNL-207919-2018-JAAM
Journal ID: ISSN 0926-3373
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Applied Catalysis. B, Environmental
Additional Journal Information:
Journal Volume: 234; Journal Issue: C; Journal ID: ISSN 0926-3373
Publisher:
Elsevier
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; Ethanol oxidation reaction (EOR); Platinum-modified tantalum carbide (TaC); In-situ infrared reflection absorption spectroscopy (IRRAS); Density functional theory (DFT)
OSTI Identifier:
1462484