Abstract
Electrocatalysis provides an optimal approach for the conversion of carbon dioxide(CO2)into high-value chemicals,thereby presenting a promising avenue toward achieve carbon neutrality.However,addressing the selec-tivity and stability challenges of metal catalysts in elec-trolytic reduction remains a daunting task.In this study,the electrospinning method is employed to fabricate porous carbon nanofibers loaded with bismuth nanoparticles with the help of in situ pyrolysis.The porous carbon nanofibers as conductive support would facilitate the dispersion of bismuth active sites while inhibiting their aggregation and promoting the mass transfer,thus enhancing their electro-catalytic activity and stability.Additionally,nitrogen doping induces electron delocalization in bismuth atoms through metal-support interactions,thus enabling efficient adsorption of intermediates for improving selectivity based on the theoretical calculation.Consequently,Bi@PCNF-500 exhibits the exceptional selectivity and stability across a wide range of potential windows.Notably,its faradaic efficiency(FE)of formate reaches 92.7％in H-cell and 94.9％in flow cell,respectively,with good electrocatalytic stability.The in situ characterization and theoretical cal-culations elucidate the plausible reaction mechanism to obtain basic rules for designing efficient electrocatalyst.
基金项目
National Natural Science Foundation of China(22175108)
National Natural Science Foundation of China(22379086)
Natural Science Foundation of Shandong Province(ZR2020JQ09)
Natural Science Foundation of Shandong Province(ZR2022ZD27)
Taishan Scholars Program of Shandong Province(tstp20221105)
NETL
NSTL
万方数据