Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ag-induced Phase Transition of Bi2O3 Nanofibers for Enhanced Energy Conversion Efficiency towards Formate in CO2 Electroreduction
Bi-based electrocatalysts have been widely investigated in the CO2 reduction reaction (CO2RR) for the formation of formate. However, it remains a challenge to achieve high Faradaic efficiency (FE) and industrial current densities at low overpotentials for obtaining both high formate productivity and energy efficiency (EE). Herein, we report an Ag−Bi2O3 hybrid nanofiber (Ag−Bi2O3) for highly efficient electrochemical reduction of CO2 to formate. Ag−Bi2O3 exhibits a formate FE of >90% for current densities from −10 to −250 mA ⋅ cm−2 and attains a yield rate of 11.7 mmol ⋅ s−1 ⋅ m−2 at −250 mA ⋅ cm−2. Moreover, Ag−Bi2O3 increased the EE (52.7%) by nearly 10% compared to a Bi2O3 only counterpart. Structural characterization and in-situ Raman results suggest that the presence of Ag induced the conversion of Bi2O3 from a monoclinic phase (α-Bi2O3) to a metastable tetragonal phase (β-Bi2O3) and accelerated the formation of active metallic Bi at low overpotentials (at > −0.3 V), which together contributes to the highly efficient formate formation. ; The authors acknowledge the financial contribution of the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (CasCat [833408]) and the Deutsche Forschungsgemeinschaft (DFG) in the framework of the research unit FOR 2397e2 (276655237). X. Wang and J Zhang are grateful to the CSC for PhD scholarships. Open Access funding enabled and organized by Projekt DEAL.
Ag-induced Phase Transition of Bi2O3 Nanofibers for Enhanced Energy Conversion Efficiency towards Formate in CO2 Electroreduction
Bi-based electrocatalysts have been widely investigated in the CO2 reduction reaction (CO2RR) for the formation of formate. However, it remains a challenge to achieve high Faradaic efficiency (FE) and industrial current densities at low overpotentials for obtaining both high formate productivity and energy efficiency (EE). Herein, we report an Ag−Bi2O3 hybrid nanofiber (Ag−Bi2O3) for highly efficient electrochemical reduction of CO2 to formate. Ag−Bi2O3 exhibits a formate FE of >90% for current densities from −10 to −250 mA ⋅ cm−2 and attains a yield rate of 11.7 mmol ⋅ s−1 ⋅ m−2 at −250 mA ⋅ cm−2. Moreover, Ag−Bi2O3 increased the EE (52.7%) by nearly 10% compared to a Bi2O3 only counterpart. Structural characterization and in-situ Raman results suggest that the presence of Ag induced the conversion of Bi2O3 from a monoclinic phase (α-Bi2O3) to a metastable tetragonal phase (β-Bi2O3) and accelerated the formation of active metallic Bi at low overpotentials (at > −0.3 V), which together contributes to the highly efficient formate formation. ; The authors acknowledge the financial contribution of the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (CasCat [833408]) and the Deutsche Forschungsgemeinschaft (DFG) in the framework of the research unit FOR 2397e2 (276655237). X. Wang and J Zhang are grateful to the CSC for PhD scholarships. Open Access funding enabled and organized by Projekt DEAL.
Ag-induced Phase Transition of Bi2O3 Nanofibers for Enhanced Energy Conversion Efficiency towards Formate in CO2 Electroreduction
Wang, Xin (Autor:in) / He, Wenhui (Autor:in) / Shi, Jialin (Autor:in) / Junqueira, João R. C. (Autor:in) / Zhang, Jian (Autor:in) / Dieckhöfer, Stefan (Autor:in) / Seisel, Sabine (Autor:in) / Das, Debanjan (Autor:in) / Schuhmann, Wolfgang (Autor:in)
29.11.2022
oai:zenodo.org:7664280
Chem Asian J. e202201165
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
690
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