Partial sulfuration-induced defect and interface tailoring on bismuth oxide for promoting electrocatalytic CO2 reduction
| Autor: | Xuxiao Yang, Mingtao Li, Peilin Deng, Shuang Zhao, Yaming Ma, Hu Wu, Chunhui Xiao, Shujiang Ding, Bao Yu Xia, Dan Li, Dongyu Liu |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Oxide chemistry.chemical_element 02 engineering and technology General Chemistry Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences Redox 0104 chemical sciences Bismuth chemistry.chemical_compound Adsorption chemistry Chemical engineering General Materials Science Formate 0210 nano-technology Faraday efficiency |
| Zdroj: | Journal of Materials Chemistry A. 8:2472-2480 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c9ta11363k |
| Popis: | Defect and interface engineering is a powerful strategy to tune the electronic structure and adsorption behavior of electrocatalysts, boosting the performance of the electrocatalytic CO2 reduction reaction (eCO2RR). Herein, we construct a hybrid electrocatalyst, Bi2S3–Bi2O3@rGO, with a large amount of defects (oxygen vacancies etc.) and a specific interface between bismuth sulfide (Bi2S3) and bismuth oxide (Bi2O3) by a partial precipitation conversion method. Both experimental results and theoretical calculations reveal that the Bi2S3–Bi2O3 interface drastically lowers the formation energy of HCOO*, in favor of the production of formate (HCOOH) over CO, promoting the conversion of CO2 to HCOOH. The as-prepared electrocatalyst shows excellent electrocatalytic activity to generate HCOOH with a high faradaic efficiency of over 90% and a low overpotential of 700 mV, as well as excellent durability for more than 24 h. |
| Databáze: | OpenAIRE |
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