Facile synthesis of high-performance indium nanocrystals for selective CO_2-to-formate electroreduction

Xiao Liangping; Liu Xiao; Zhou Renwu; Zhang Tianqi; Zhou Rusen; Ouyang Bo; Kan Erjun; Cullen Patrick J.; Ostrikov Kostya (Ken); Tu Xin

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Facile synthesis of high-performance indium nanocrystals for selective CO_2-to-formate electroreduction

机译：适合高性能铟纳米晶体选择性CO_2 - 甲酸 - 甲酸电镀膜的合成

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Selective electrocatalytic reduction of CO2 to formate has received increasing interest for CO2 conversion and utilization. Yet, the CO2 reduction process still faces major challenges, partly due to the lack of cost-effective, highly active, selective and stable electrocatalysts. Here, we report a mesoporous indium (mp-In) electrocatalyst composed of nanobelts synthesized via a simple solution-based approach for selective CO2 reduction to formate. The mp-In nanocrystals provide enlarged surface areas, abundant surface active sites and edge/low-coordinated sites. Such advantages afford the mp-In with an outstanding electrocatalytic performance for the CO2-to-formate conversion. A high formate selectivity, with a Faradaic efficiency (FE) of 90% was achieved over a potential of 0.95 V to 1.1 V (vs VRHE). The mp-In catalyst showed excellent durability, reflected by the stable formate selectivity and current density over a 24 h reaction period. Density functional theory (DFT) calculations reveal that the stabilization of the intermediate OCHO* on the In-plane surfaces is energetically feasible, further elucidating the origin of its enhanced CO2-to-formate activity and selectivity. This work may offer valuable insights for the facile fabrication of porous hierarchical nanostructures for electrocatalytic and selective reduction of CO2.

机译：选择性电催化还原二氧化碳甲酸甲酸酯对二氧化碳转化和利用率的影响增加了兴趣。然而，二氧化碳还原过程仍然面临重大挑战，部分原因是由于缺乏成本效益，高度活跃，选择性和稳定的电催化剂。在这里，我们报告了由通过简单的基于溶液的方法合成的纳米螺纹组成的介孔铟（MP-IN）电催化剂，用于选择性CO 2还原以形成。 MP-纳米晶体提供放大的表面积，丰富的表面活性部位和边缘/低协调位点。这种优点是MP-in含有突出的电催化性能，用于CO2-甲酸酯转化。在0.95V至1.1V（VS VRHE）的潜力上实现了高甲酸效率（Fe）> 90％的比例选择性。 MP-催化剂显示出优异的耐久性，通过稳定的甲酸盐选择性和电流密度在24小时内反射而反射。密度函数理论（DFT）计算表明，在平面内表面上中间OCho *的稳定能力是能量的可行性，进一步阐明其增强的CO 2至甲酸酯活性和选择性的来源。这项工作可以为电催化和选择性减少CO 2的多孔分层纳米结构的便利制作提供有价值的见解。

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来源
《Energy Conversion & Management》 |2021年第3期|113847.1-113847.10|共10页
作者
Xiao Liangping; Liu Xiao; Zhou Renwu; Zhang Tianqi; Zhou Rusen; Ouyang Bo; Kan Erjun; Cullen Patrick J.; Ostrikov Kostya (Ken); Tu Xin;
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作者单位

Xiamen Univ Dept Chem State Key Lab Phys Chem Solid Surfaces Coll Chem & Chem Engn Xiamen 361005 Peoples R China;

Xiamen Univ Dept Chem State Key Lab Phys Chem Solid Surfaces Coll Chem & Chem Engn Xiamen 361005 Peoples R China;

Univ Sydney Sch Chem & Bimol Engn Sydney NSW 2008 Australia;

Univ Sydney Sch Chem & Bimol Engn Sydney NSW 2008 Australia;

Xiamen Univ Dept Chem State Key Lab Phys Chem Solid Surfaces Coll Chem & Chem Engn Xiamen 361005 Peoples R China|Univ Sydney Sch Chem & Bimol Engn Sydney NSW 2008 Australia|Queensland Univ Technol Ctr Mat Sci Sch Chem & Phys Brisbane Qld 4000 Australia;

Nanjing Univ Sci & Technol Dept Appl Phys Nanjing Peoples R China|Nanjing Univ Sci & Technol Inst Energy & Microstruct Nanjing Peoples R China;

Nanjing Univ Sci & Technol Dept Appl Phys Nanjing Peoples R China|Nanjing Univ Sci & Technol Inst Energy & Microstruct Nanjing Peoples R China;

Univ Sydney Sch Chem & Bimol Engn Sydney NSW 2008 Australia;

Queensland Univ Technol Ctr Mat Sci Sch Chem & Phys Brisbane Qld 4000 Australia;

Univ Liverpool Dept Elect Engn & Elect Liverpool L69 3GJ Merseyside England;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
CO2 reduction; Electrocatalysis; Mesoporous indium catalysts; Formate; CO2 conversion;

机译：二氧化碳减少;电殖分析;中孔铟催化剂;甲酸;CO2转化;

Facile synthesis of high-performance indium nanocrystals for selective CO_2-to-formate electroreduction

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