Ni-based electrocatalyst for water oxidation developed In-situ in a HCO3 -/CO2 system at near-neutral pH
KAUST DepartmentKAUST Catalysis Center (KCC)
Physical Sciences and Engineering (PSE) Division
Chemical Science Program
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AbstractElectrochemically generated NiOx nanoworms from a neutral bicarbonate system split water into dioxygen and protons with tremendous efficiency and stability. The NiOx electrocatalyst follows a pH-potential dependence, revealing a PCET (proton coupled electron transfer) mechanism of one electron and one proton oxidation. It does not require proton abstracting phosphate or borate buffers for electrogeneration and catalysis, and shows promising activity for anodic oxidation of water in phosphate, borate, and carbonate buffers. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
SponsorsK.S.J. acknowledges research funding from the Higher Education Commission (HEC), Government of Pakistan and Leiden University for the research support and facilities. The research work was also supported in part by the BioSolar Cells program (project numbers C1.6 and C1.9) of the Ministry of Economy, Agriculture, and Innovation of The Netherlands. The authors are also thankful to Dr. Marcel Hesselberth for the SEM analyses and Mr. Verhoeven Tiny is greatly acknowledged for the XPS experiments.
JournalAdvanced Energy Materials