Journal
ACS CATALYSIS
Volume 7, Issue 9, Pages 6385-6391Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.7b02145
Keywords
water splitting; amorphous materials; calcium-doped lanthanum cobaltite; oxygen evolution reaction; photochemical thin-film deposition; solar fuels; electrocatalysis
Categories
Funding
- Canadian Research Chairs
- NSERC of Canada
- MITACS
- University of Calgary
- Canadian Foundation for Innovation
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The influence of calcium doping on the electrocatalytic activity of amorphous lanthanum cobaltite a-La1-yCayCoOx with respect to the oxygen evolution reaction in 0.1 M KOH is investigated. The introduction of calcium slightly decreases the activity and does not hamper the short-term stability very much. a-La0.7Ca0.3CoOx demonstrates the highest activity among the calcium-containing materials, which is ascribed to the higher concentration of Co3+ and lower film resistance as determined from ex situ X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy.
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