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Halide-guided carbon-affinity active sites in BimOnBrp-derived Bi2O2CO3 for efficient electrocatalytic CO2 reduction to formate
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2024-08-19 , DOI: 10.1039/d4cy00904e Dengye Yang 1 , Qing Mao 1 , Yuting Feng 1 , Wei Zhou 1
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2024-08-19 , DOI: 10.1039/d4cy00904e Dengye Yang 1 , Qing Mao 1 , Yuting Feng 1 , Wei Zhou 1
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Bismuth oxyhalides (BimOnXp, where X represents Cl, Br, and I) present a promising family of template catalysts for in situ Bi2O2CO3 synthesis to achieve the highly efficient CO2 electrochemical reduction reaction (CO2RR) toward formate. However, the specific mechanism behind BimOnXps' structural reconstruction and their subsequent effects on CO2RR performance remain unresolved inquiries. In this study, a comprehensive investigation into how halogens (Cl, Br, and I) influence BimOnXp CO2RR performance was conducted. It is suggested that Br is capable of introducing a bismuth-rich phase (Bi24O31Br10) in BiOBr, which promotes the formation of external Bi–O structural characteristics and leads to exceptional CO2RR performance, with a faradaic efficiency (FEHCOO−) of 90.67% and a formate partial current density (JHCOO−) of 52.31 mA cm−2, surpassing those of BiOCl and BiOI. Kinetic simulations suggest that the alternative Bi–O structure will promote the combination of the Bi–O structure and carbon-based intermediates, leading to the improved kinetics of the rate-determining step, and ultimately resulting in better CO2RR performance.
中文翻译:
BimOnBrp 衍生的 Bi2O2CO3 中卤化物引导的碳亲和活性位点可有效电催化 CO2 还原为甲酸盐
卤氧化铋(Bi m O n X p ,其中 X 代表 Cl、Br 和 I)是一类很有前途的模板催化剂,用于原位合成Bi 2 O 2 CO 3 ,以实现高效的 CO 2电化学还原反应(CO 2 RR) 朝向甲酸盐。然而,B m O n X p s结构重构背后的具体机制及其对CO 2 RR性能的后续影响仍然悬而未决。在本研究中,对卤素(Cl、Br 和 I)如何影响 Bi m O n X p CO 2 RR 性能进行了全面研究。 研究表明,Br能够在BiOBr中引入富铋相(Bi 24 O 31 Br 10 ),从而促进外部Bi-O结构特征的形成,并导致优异的CO 2 RR性能,并具有法拉第效率( FE HCOO - )为90.67%,甲酸盐部分电流密度( J HCOO - )为52.31 mA cm -2 ,超过了BiOCl和BiOI。动力学模拟表明,替代的Bi-O结构将促进Bi-O结构与碳基中间体的结合,从而改善速率决定步骤的动力学,并最终获得更好的CO 2 RR性能。
更新日期:2024-08-19
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
BimOnBrp 衍生的 Bi2O2CO3 中卤化物引导的碳亲和活性位点可有效电催化 CO2 还原为甲酸盐
卤氧化铋(Bi m O n X p ,其中 X 代表 Cl、Br 和 I)是一类很有前途的模板催化剂,用于原位合成Bi 2 O 2 CO 3 ,以实现高效的 CO 2电化学还原反应(CO 2 RR) 朝向甲酸盐。然而,B m O n X p s结构重构背后的具体机制及其对CO 2 RR性能的后续影响仍然悬而未决。在本研究中,对卤素(Cl、Br 和 I)如何影响 Bi m O n X p CO 2 RR 性能进行了全面研究。 研究表明,Br能够在BiOBr中引入富铋相(Bi 24 O 31 Br 10 ),从而促进外部Bi-O结构特征的形成,并导致优异的CO 2 RR性能,并具有法拉第效率( FE HCOO - )为90.67%,甲酸盐部分电流密度( J HCOO - )为52.31 mA cm -2 ,超过了BiOCl和BiOI。动力学模拟表明,替代的Bi-O结构将促进Bi-O结构与碳基中间体的结合,从而改善速率决定步骤的动力学,并最终获得更好的CO 2 RR性能。