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This content will become publicly available on January 25, 2019

Title: Oxygen Reduction Reaction on Ag(111) in Alkaline Solution: A Combined Density Functional Theory and Kinetic Monte Carlo Study

We reported a detailed mechanistic study of the oxygen reduction reaction (ORR) on the model Ag(111) surface in alkaline solution by using density functional theory (DFT) and Kinetic Monte Carlo (KMC) simulations, in which multiple pathways involving either 2 e - or 4 e - mechanisms were included. The theoretical modelling presented here is able to reproduce the experimentally measured polarization curves in both low and high potential regions. An electrochemical 4 e - network including both a chemisorbed water (*H 2O)-mediated 4 e - associative pathway and the conventional associative pathway was identified to dominate the ORR mechanism. On the basis of the mechanistic understanding derived from these calculations, the ways to promote the ORR on Ag(111) were provided, including facilitating *OH removal, **O 2 reduction by *H 2O, and suppressing **O 2 desorption. Finally, the origin of the different ORR behaviors of Ag(111) and Pt(111) was also discussed in detail.
Authors:
 [1] ;  [2] ; ORCiD logo [3]
  1. State Univ. of New York (SUNY), Stony Brook, NY (United States). Chemistry Dept.
  2. State Univ. of New York (SUNY), Stony Brook, NY (United States). Chemistry Dept.; Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Division
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Division
Publication Date:
Report Number(s):
BNL-114833-2017-JAAM
Journal ID: ISSN 1867-3880
Grant/Contract Number:
SC0012704; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
ChemCatChem
Additional Journal Information:
Journal Volume: 10; Journal Issue: 3; Journal ID: ISSN 1867-3880
Publisher:
ChemPubSoc Europe
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1424995
Alternate Identifier(s):
OSTI ID: 1418069