Journal
ADVANCED ENERGY MATERIALS
Volume 9, Issue 28, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201901503
Keywords
electrocatalysts; electronic effects; metal boride; nanosheets; water oxidation
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Funding
- National Research Foundation (NRF), Prime Minister's Office, Singapore under its Campus for Research Excellence and Technological Enterprise (CREATE) program
- academic research fund AcRF tier 1 Ministry of Education, Singapore [M4011784 RG16/17, M4012076 RG118/18]
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The metal-metalloid materials have received a massive interest as oxygen-evolving catalysts due to their ability for charge transfer between different elements and modified electronic structures lowering the kinetic energy barriers of the electrochemical processes. Herein, a facile and systematic preparation of metal borides by chemical reduction is reported, with morphologies ranging from nanoparticles to nanosheets which is driven by a careful selection of metal salts solution. The iron doping in cobalt boride nanosheets is found to be an effective approach to further tune the water oxidation activity. The as-prepared catalyst exhibited superior oxygen evolution performance in 1.0 m KOH as the optimized ternary CoFe boride needs an overpotential of 265 mV to achieve a current density of 10 mA cm(-2) at a mass loading of 0.3 mg cm(-2).
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