Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 119, Issue 34, Pages 19573-19583Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.5b02685
Keywords
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Funding
- Canada Foundation for Innovation
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Saskatchewan
- Government of Saskatchewan
- Western Economic Diversificatibn Canada
- National Research Council Canada
- Canadian Institutes of Health Research
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A promising NiFe(OH) catalyst for oxygen evolution reaction (OER) has been successfully fabricated and studied in detail using in situ X-ray absorption near-edge structure (XANES) spectroscopy. The chemical nature of elements (Ni, Fe) in electrocatalysts has been elucidated from Fe and Ni K- and L-edge XANES. The increase of oxidation states of Ni from Ni(III) to Ni(3.6) together with a highly covalent Fe(IV)-O bond under OER process is observed. Charge transfer between Ni and Fe through a Ni-O-Fe bond is proposed, accounting for the high catalytic activities of NiFe(OH)(x).
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