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Title: Water Oxidation Catalysis via Size-Selected Iridium Clusters

Abstract

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 (Ir-2, Ir-4, or Ir-8) 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.

Authors:
 [1]; ORCiD logo [2];  [3];  [4];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [5]; ORCiD logo [1]
  1. Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, United States
  2. Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, United States
  3. Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, United States; College of Materials Science and Engineering, Jilin University, Changchun, Jilin 130012, China
  4. Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, United States
  5. Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, United States; Institute for Molecular Engineering, The University of Chicago, 5640 S Ellis Avenue, Chicago, IL60637, United States
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1440760
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Physical Chemistry. C; Journal Volume: 122; Journal Issue: 18
Country of Publication:
United States
Language:
English

Citation Formats

Halder, Avik, Liu, Cong, Liu, Zhun, Emery, Jonathan D., Pellin, Michael J., Curtiss, Larry A., Zapol, Peter, Vajda, Stefan, and Martinson, Alex B. F. Water Oxidation Catalysis via Size-Selected Iridium Clusters. United States: N. p., 2018. Web. doi:10.1021/acs.jpcc.8b01318.
Halder, Avik, Liu, Cong, Liu, Zhun, Emery, Jonathan D., Pellin, Michael J., Curtiss, Larry A., Zapol, Peter, Vajda, Stefan, & Martinson, Alex B. F. Water Oxidation Catalysis via Size-Selected Iridium Clusters. United States. doi:10.1021/acs.jpcc.8b01318.
Halder, Avik, Liu, Cong, Liu, Zhun, Emery, Jonathan D., Pellin, Michael J., Curtiss, Larry A., Zapol, Peter, Vajda, Stefan, and Martinson, Alex B. F. Fri . "Water Oxidation Catalysis via Size-Selected Iridium Clusters". United States. doi:10.1021/acs.jpcc.8b01318.
@article{osti_1440760,
title = {Water Oxidation Catalysis via Size-Selected Iridium Clusters},
author = {Halder, Avik and Liu, Cong and Liu, Zhun and Emery, Jonathan D. and Pellin, Michael J. and Curtiss, Larry A. and Zapol, Peter and Vajda, Stefan and Martinson, Alex B. F.},
abstractNote = {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 (Ir-2, Ir-4, or Ir-8) 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.},
doi = {10.1021/acs.jpcc.8b01318},
journal = {Journal of Physical Chemistry. C},
number = 18,
volume = 122,
place = {United States},
year = {Fri Apr 20 00:00:00 EDT 2018},
month = {Fri Apr 20 00:00:00 EDT 2018}
}