Amorphous Carbon Interconnected Ultrafine CoMnP with Enhanced Co Electron Delocalization Yields Pt-Like Activity for Alkaline Water Electrolysis

Xu Yanchao; Wei Shuting; Gan LinfengZhang LeiWang FengWu QiongCui XiaoqiangZheng Weitao

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Amorphous Carbon Interconnected Ultrafine CoMnP with Enhanced Co Electron Delocalization Yields Pt-Like Activity for Alkaline Water Electrolysis

机译：Amorphous Carbon Interconnected Ultrafine CoMnP with Enhanced Co Electron Delocalization Yields Pt-Like Activity for Alkaline Water Electrolysis

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Constructing earth-abundant water splitting electrocatalysts performing platinum-like activity is promising for the hydrogen economy but still a challenging task. Herein, the ultrafine CoMnP nanocrystals confined in amorphous carbon nanosheets are designed and implemented by a topological transformation strategy from layer double hydroxide/carbon interconnected structures in one single nanosheet. The unique interconnected structure favors the exposure of active sites and enables stronger electronic coupling effect between the two phases. Experimental results and density functional theory simulations reveal that the surrounding amorphous carbon and Mn dopants synergistically enable better electron delocalization capacity of Co sites, potentially providing enhanced conductivity and optimal reaction energetics during hydrogen evolution. The as-prepared catalyst exhibits hydrogen evolution reaction performances superior to that of Pt/C under alkaline media with an overpotential of 114 mV at 100 mA cm(-2). This work highlights the rational fabrication of transition metal-based electrocatalysts via spatially confined growth for efficient water electrolysis.

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来源
《Advanced functional materials》 |2022年第21期|2112623.1-2112623.9|共9页
作者
Xu Yanchao; Wei Shuting; Gan LinfengZhang LeiWang FengWu QiongCui XiaoqiangZheng Weitao;
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作者单位

Jilin Univ, Sch Mat Sci & Engn, State Key Lab Automot Simulat & Control, Key Lab Automobile Mat MOE, Changchun 130012, Peoples R China;

Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Jilin, Peoples R China;

Jilin Univ, Coll Chem, Changchun 130012, Jilin, Peoples R China;

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正文语种英语
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electronic modulation; hydrogen evolution; interconnected structures; spatially confined synthetic strategy; transition-metal phosphide;

Amorphous Carbon Interconnected Ultrafine CoMnP with Enhanced Co Electron Delocalization Yields Pt-Like Activity for Alkaline Water Electrolysis

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