Journal
ACS CATALYSIS
Volume 3, Issue 8, Pages 1850-1854Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs4003595
Keywords
electrocatalysis; reticulated vitreous carbon; nanoITO; high surface area; polypyridyl ruthenium complex; water oxidation
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Funding
- Center for Catalytic Hydrocarbon Functionalization, an Energy Frontier Research Center (EFRC)
- U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES) [DE-SC0001298]
- UNC EFRC: Center for Solar Fuels, an Energy Frontier Research Center
- U.S. DOE-BES [DE-SC0001011]
- Research Triangle Solar Fuels Institute (RTSFI)
- U.S. Department of Energy (DOE) [DE-SC0001298] Funding Source: U.S. Department of Energy (DOE)
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A procedure is described for preparing and derivatizing novel, high surface area electrodes consisting of thin layers of nanostructured ITO (Sn(IV)-doped indium tin oxide, nanoITO) on reticulated vitreous carbon (RVC) to give RVClnanoITO. The resulting hybrid electrodes are highly stabilized oxidatively. They were surface-derivatized by phosphonate binding of the electrocatalyst, [Ru(Mebimpy)(4,4'-((HO)(2)OPCH2)(2)bpy)(OH2)](2+) (Mebimpy = 2,6-bis(1-methylbenzimidazol-2-yl)pyridine; bpy = 2,2'-bipyridine) (1-PO3H2) to give RVClnanoITO-Ru-II-OH22+. The redox properties of the catalyst are retained on the electrode surface. Electrocatalytic oxidation of benzyl alcohol to benzaldehyde occurs with a 75% Faradaic efficiency compared to 57% on nanoITO. Electrocatalytic water oxidation at 1.4 V vs SCE on derivatized RVClnanoITO electrode with an internal surface area of 19.5 cm(2) produced 7.3 mu moles of O-2 in 70% Faradaic yield in 50 min.
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