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Title: Water Oxidation Catalysis via Size-Selected Iridium Clusters

Journal Article · · Journal of Physical Chemistry. C

Here, the detailed mechanism and efficacy of four electron electrochemical water oxidation depend critically upon the detailed atomic structure of each catalytic site, which are numerous and diverse in most metal oxides anodes. In order to limit the diversity of sites, arrays of discrete iridium clusters with identical metal atom number (Ir2, Ir4, or Ir8) were deposited in submonolayer coverage on conductive oxide supports, and the electrochemical properties and activity of each was evaluated. Exceptional electroactivity for the oxygen evolving reaction (OER) was observed for all cluster samples in acidic electrolyte. Reproducible cluster-size-dependent trends in redox behavior were also resolved. First-principles computational models of the individual discrete-size clusters allow correlation of catalytic-site structure and multiplicity with redox behavior.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Light Energy Activated Redox Processes (LEAP); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1440760
Journal Information:
Journal of Physical Chemistry. C, Vol. 122, Issue 18; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Cited By (2)

Oxygen‐Deficient Ti 0.9 Nb 0.1 O 2‐x as an Efficient Anodic Catalyst Support for PEM Water Electrolyzer journal April 2019
Inorganic Photochemistry and Solar Energy Harvesting: Current Developments and Challenges to Solar Fuel Production journal January 2019