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首页> 外文期刊>Catalysis science & technology >Efficient and stable low-temperature CO oxidation over Pt/In-SnO2 composite triggered by abundant oxygen vacancies and adsorption sites
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Efficient and stable low-temperature CO oxidation over Pt/In-SnO2 composite triggered by abundant oxygen vacancies and adsorption sites

机译：高效和稳定的低温氧化在Pt / In-SnO2复合引发的丰富氧空位和吸附的网站

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摘要

It is of great significance to design highly active and stable catalysts for CO oxidation. Herein, a Pt/In-SnO2 catalyst was firstly fabricated via a facile hydrothermal reaction coupled with photoreduction strategy, achieving 1 vol% of CO totally oxidized at just 145 degrees C, over 200 degrees C lower than that of Pt/SnO2. Moreover, Pt/In-SnO2 demonstrates superior catalytic stability and recyclability under both dry and humid conditions. Incorporation of In cations results in marked structure distortion of SnO2, promoting the formation of oxygen vacancies and enhancing the concentration and mobility of reactive oxygen species. Abundant Pt sites over Pt/In-SnO2 further accelerate CO adsorption and activation. Density functional theory results prove that the energy barrier of CO oxidation reduces from 0.85 to 0.75 eV after In doping and the produced CO2 can desorb spontaneously from the catalyst surface, which accelerates the CO oxidation process. This work provides new ideas for designing robust catalysts for low-temperature CO elimination.
机译：它是设计高度具有重要意义积极和稳定的催化剂对CO氧化。在此,首先Pt / In-SnO2催化剂通过一个简单热液反应捏造加上光致还原作用的策略,达到1卷%的公司完全氧化在145度C,在200摄氏度低于Pt / SnO2。此外,Pt / In-SnO2演示了优越催化稳定性和再循环能力干燥和潮湿的条件。阳离子导致结构变形SnO2,促进氧气空位的形成的浓度和迁移率和增强活性氧物种。Pt / In-SnO2进一步加速CO吸附和激活。证明CO氧化的能量势垒减少了在掺杂后从0.85到0.75 eV自发产生的二氧化碳可以使解除吸附催化剂表面,加速有限公司氧化过程。设计健壮的催化剂低温消除。

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