首页|Controllable synthesis and phase-dependent electrocatalytic oxygen evolution performance of CoNiFe sulfide nanocubes
Controllable synthesis and phase-dependent electrocatalytic oxygen evolution performance of CoNiFe sulfide nanocubes
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NSTL
Elsevier
? 2022 Elsevier B.V.The electrochemical oxygen evolution reaction (OER) highly depends on the phase structure of catalysts. Herein, the CoNiFe-based sulfides are fabricated by a surface decoration on NiFe Prussian blue analogue, followed by an evaporating sulfurization process. The as-formed metal sulfides have a nanocubic morphology and show a phase-dependent OER activity in alkaline electrolyte. The optimized catalyst possesses a remarkable activity and durability towards OER, featured by a low overpotential of 288 mV at 10 mA cm?2 and a small Tafel slope of 72 mV dec?1. The outstanding OER performance originates from the hierarchically porous architecture and interfacial coupling between CoS2 and (Ni,Fe)S2 phases. Our finding provides a promising strategy to develop advanced low-cost electrocatalysts with intriguing phase structure by producing the heterojunctions via post treatments on PBA such as surface modification and evaporation sulfidization.
ElectrocatalystMetal sulfideOxygen evolutionPrussian blue analogue
Cheng H.、Zhou H.、Zhuang Y.、Chen B.、Chen J.、Yuan A.
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School of Materials Science and Engineering Jiangsu University of Science and Technology
School of Environmental and Chemical Engineering Jiangsu University of Science and Technology
NSTL
Elsevier
