Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 18, Pages 9707-9713Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta01012h
Keywords
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Funding
- National Natural Science Foundation of China [21207108]
- Sichuan Youth Science and Technology Foundation [2013JQ0012]
- Research Foundation of CWNU [12B018, 14E016]
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Well-defined cobalt oxalate (CoC2O4 center dot 2H(2)O) microstructures with controllable morphologies have been successfully synthesized by a simple solvothermal process. The resulting CoC2O4 center dot 2H(2)O microrods (MRs) and micropolyhedrons (MPs) can be easily controlled by rationally tuning the composition of solvents. It is experimentally demonstrated that CoC2O4 center dot 2H(2)O microstructures as nonprecious metal based electrocatalysts exhibit remarkable activity for catalyzing OER in alkaline medium. Such performance is found to be closely dependent on the morphology of CoC2O4 center dot 2H(2)O microstructures. The MRs with higher aspect ratio and more active Co sites manifest a small OER onset potential, large anodic current and long-term durability, which are superior to the MPs, derived Co3O4 MRs, and previously reported cobalt oxalate electrocatalysts, and even compare favorably with most previously reported Co-based OER electrocatalysts.
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