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首页> 外文期刊>Advanced energy materials >Self-Templated Synthesis of CoFeP @ C Cage-In-Cage Superlattices for Enhanced Electrocatalytic Water Splitting
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Self-Templated Synthesis of CoFeP @ C Cage-In-Cage Superlattices for Enhanced Electrocatalytic Water Splitting

机译：Self-Templated Synthesis of CoFeP @ C Cage-In-Cage Superlattices for Enhanced Electrocatalytic Water Splitting

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Designing highly-efficient, cost-effective, and stable electrocatalysts for watersplitting is of great significance for implementing renewable energy technologies.Herein, a self-templated strategy is employed to fabricate 2D porouselectrocatalysts of heterometallic phosphides featuring a cage-in-cage superlatticearchitecture. The as-made heterometallic phosphide electrocatalysts,comprising a layer of close-packed CoFeP nanocages intimately embedded inan interconnected carbon-cage framework, are converted from carbon-coatedCoFeO nanocrystal superlattices by one-step phosphidation. Benefiting fromthe unique hierarchical porous structure and the ability of modulating theCo/Fe molar ratio, such 2D CoFeP @ C cage-in-cage superlattices showremarkable activity and stability for both oxygen evolution reaction (OER) andhydrogen evolution reaction (HER) in alkaline media. Moreover, water electrolyzersconstructed using CoFeP @ C superlattices as both cathode and anoderequire a low cell voltage of 1.55 V to achieve a current density of 10 mA cm~(?2),outperforming most nonprecious metal-based electrocatalysts reported previously.The superior electrocatalytic performance of CoFeP @ C superlatticesis revealed by density functional theory calculations. These findings providenew opportunities for developing efficient and stable bifunctional electrocatalystsfor water splitting.

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