首页|In situ embedded bismuth nanoparticles among highly porous carbon fibers for efficient carbon dioxide reduction

In situ embedded bismuth nanoparticles among highly porous carbon fibers for efficient carbon dioxide reduction

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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.

Porous carbon nanofiberN-dopingElectron delocalizationCarbon dioxide reduction

Wei-Jian Guo、Ao Zhou、Wen-Wen Cai、Jin-Tao Zhang

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Key Laboratory for Colloid and Interface Chemistry,Ministry of Education,School of Chemistry and Chemical Engineering,Shandong University,Ji'nan 250100,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceTaishan Scholars Program of Shandong Province

2217510822379086ZR2020JQ09ZR2022ZD27tstp20221105

2024

10.1007/s12598-024-02803-9

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(9)
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