In situ growth of N-doped carbon coated CoNi alloy with graphene decoration for enhanced HER performance
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摘要
Non-noble metal-based catalysts,especially stable ones,have gained increasing attentions in the field of electronically catalytic hydrogen evolution reaction(HER).In this work,an N-doped carbon confined Co–Ni alloy with reduced graphene oxide(rGO) decoration(CoNi@N-C/rGO) was fabricated for HER.The prepared catalyst exhibited excellent HER activity in an acidic electrolyte(Tafel slope of ～133.7 m V).The results showed that the enhanced HER performance of the nanostructures is attributed to the chemical and electronic synergic effect between the confined Co–Ni alloy and r GO.Stability tests,realized via longterm potential cycles and extended electrolysis,provided the confirmation of the exceptional durability of the catalyst,which originated from the confining effect of the N-doped carbon shell.This versatile method provides a strategy for designing stable non-precious metal electrocatalysts confined by carboncoating.
Non-noble metal-based catalysts,especially stable ones,have gained increasing attentions in the field of electronically catalytic hydrogen evolution reaction(HER).In this work,an N-doped carbon confined Co–Ni alloy with reduced graphene oxide(rGO) decoration(CoNi@N-C/rGO) was fabricated for HER.The prepared catalyst exhibited excellent HER activity in an acidic electrolyte(Tafel slope of ～133.7 m V).The results showed that the enhanced HER performance of the nanostructures is attributed to the chemical and electronic synergic effect between the confined Co–Ni alloy and r GO.Stability tests,realized via longterm potential cycles and extended electrolysis,provided the confirmation of the exceptional durability of the catalyst,which originated from the confining effect of the N-doped carbon shell.This versatile method provides a strategy for designing stable non-precious metal electrocatalysts confined by carboncoating.
Non-noble metal-based catalysts,especially stable ones,have gained increasing attentions in the field of electronically catalytic hydrogen evolution reaction(HER).In this work,an N-doped carbon confined Co–Ni alloy with reduced graphene oxide(rGO) decoration(CoNi@N-C/rGO) was fabricated for HER.The prepared catalyst exhibited excellent HER activity in an acidic electrolyte(Tafel slope of ～133.7 m V).The results showed that the enhanced HER performance of the nanostructures is attributed to the chemical and electronic synergic effect between the confined Co–Ni alloy and r GO.Stability tests,realized via longterm potential cycles and extended electrolysis,provided the confirmation of the exceptional durability of the catalyst,which originated from the confining effect of the N-doped carbon shell.This versatile method provides a strategy for designing stable non-precious metal electrocatalysts confined by carboncoating.
引文
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