Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 133, Issue 38, Pages 14872-14875Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja205569j
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Funding
- Department of Energy (DOE) Office of Science
- DOE [DE-AC05-06OR23100]
- Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, DOE [SE-FG02-03ER15453]
- National Science Foundation [CHE-061-1588, CHE-1057723]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1057723] Funding Source: National Science Foundation
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The question of what is the true catalyst? when beginning with the cobalt polyoxometalate (POM) [Co-4(H2O)(2)(PW9O34)(2)](10-) in electrochemical water oxidation catalysis is examined in pH 8.0 sodium phosphate buffer at a glassy carbon electrode. Is [Co-4(H2O)(2)(PW9O34)(2)](10-) a true water oxidation catalyst (WOC), or just a precatalyst? Electrochemical, kinetic, UV-vis, SEM, EDX, and other data provide four main lines of compelling evidence that, under the conditions used herein, the dominant WOC is actually heterogeneous CoOx and not homogeneous [Co-4(H2O)(2)(PW9O34)(2)](10-).
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