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Experimental study demonstrates enhanced oxygen evolution using porous yolk-shell cobalt-cerium oxide nanospheres in alkaline electrolyte, suggesting an effective route for durable water-splitting...
Exploration of efficient, inexpensive, and stable electrocatalysts for the oxygen evolution reaction (OER) is of great significance for the energy crisis and environmental problems. Transition metal oxides (TMOs) are promising electrocatalysts for boosting OER. Herein, porous yolk@shell heterojunction nanospheres (denoted Co 3 O 4 @CeO 2 /Co 3 O 4 ) were designed by interfaces and vacancies engineering as electrocatalysts for OER. Owing to the large specific surface area of the porous yolk@shell structure, high oxygen vacancy content, and good stability provided by CeO 2, rapid charge transfer of Ce 3+ /Ce 4+, and interaction of CeO 2 /Co 3 O 4 heterojunctions, Co 3 O 4 @CeO 2 /Co 3 O 4 nanospheres exhibit relatively excellent oxygen evolution performance (318 mV@10 mA cm –2 ) and long-term stability for 45 h in a 1.0 M KOH solution. This work provides a facile way to fabricate a kind of porous yolk@shell heterojunction nanomaterials for improving the OER performance of TMOs electrocatalysis.
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Liu et al. (2024) studied this question.
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