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首页> 外文期刊>Catalysis science & technology >Metal-organic framework derived carbon supported Cu-In nanoparticles for highly selective CO2 electroreduction to CO
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Metal-organic framework derived carbon supported Cu-In nanoparticles for highly selective CO2 electroreduction to CO

机译：有机框架中碳的支持铜纳米粒子为高度选择性的二氧化碳电解还原到公司

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摘要

Cu-based materials are promising electrocatalysts for the CO2 reduction reaction (CO2RR). However, they still suffer from intense hydrogen evolution, as well as low selectivity and efficiency for the CO2RR. In this work, Cu-In bimetallic catalysts for the CO2RR were prepared by the pyrolysis of Cu-In metal-organic framework (MOF) materials. Cu90In10/C with a Cu/In molar ratio of 9/1 exhibited a high CO selectivity of up to 85% at -0.75 V versus the reversible hydrogen electrode, compared with 3.1% on Cu/C and 10.8% on In/C. On the Cu90In10/C catalyst, In was found to be locally distributed on the surface of Cu nanoparticles, forming Cu4In, changing the geometric and electronic structures of the Cu surface. These modifications were supposed to have modulated the adsorption properties of the catalyst for *H, CO2 and the intermediates during the CO2RR, therefore the electrochemical conversion of CO2 to CO was enhanced and hydrogen evolution was mitigated. The enlarged electrochemically active surface area and the accelerated charge transfer and reaction kinetics of this Cu-In bimetallic catalyst also contributed much to its excellent CO2RR performance. This work not only highlights the superior CO2 electroreduction performance of bimetals over monometals, but also provides a new method to develop bimetallic catalysts.
机译：铜材料是有前途的electrocatalysts二氧化碳还原反应(CO2RR)。他们仍然遭受强烈的氢进化,以及选择性和较低CO2RR效率。双金属催化剂CO2RR做好准备的话铜在高温分解的有机框架(MOF)材料。9/1的比例表现出高CO的选择性85%在-0.75 V和可逆的氢电极,相比之下,3.1%在铜/ C在/ C和10.8%。被发现在本地分布式的铜纳米粒子的表面,形成Cu4In,变化的几何和电子结构铜的表面。应该调整吸附催化剂的属性* H,二氧化碳和在CO2RR中间体,因此电化学二氧化碳转换成有限公司增强和氢进化是减轻。扩大了电化学表面面积和电荷转移和加速反应动力学的铜双金属也贡献了很多优秀的催化剂CO2RR性能。上级二氧化碳电解还原性能在单金属双金属,但也提供了一个新的方法开发双金属催化剂。

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