Surface generation of a cobalt-derived water oxidation electrocatalyst developed in a neutral HCO3 -/CO2 system
KAUST DepartmentKAUST Catalysis Center (KCC)
Physical Sciences and Engineering (PSE) Division
Chemical Science Program
Catalysis for Energy Conversion (CatEC)
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AbstractNeutral HCO3 -/CO2 is a new electrolyte system for in situ generation of robust and efficient Co-derived (Co-Ci) water oxidation electrocatalysts. The Co-Ci/indium tin oxide system shows a remarkable 2.0 mA cm-2 oxygen evolution current density that is sustained for several hours. 7.5 nmol of electroactive species per cm2 generates about 109 μmol of O2 at a rate of 0.51 per mol of catalyst per second.
SponsorsK.S.J. acknowledges research funding from the Higher Education Commission (HEC), Government of Pakistan and Leiden University/BioSolar Cells for the research support and facilities. The authors are thankful to Dr. Marcel Hesselberth for the SEM analyzes and Mr. Verhoeven Tiny is gratefully acknowledged for the XPS experiments. The help of Dr. Shahid Rasool and Angel Garcia (KCC, KAUST) in performing online GC measurements for O<INF>2</INF> characterization, and Dr. Naeem-Ur-Rehman Minhas (Characterization Lab, KAUST) for EDX analyzes is greatly acknowledged.
JournalAdvanced Energy Materials