Oxygen vacancy mediated bismuth stannate ultra-small nanoparticle towards photocatalytic CO2-to-CO conversion
Oxygen vacancy mediated bismuth stannate ultra-small nanoparticle towards photocatalytic CO2-to-CO conversion
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氧空位介导的锡酸铋超小纳米粒子用于光催化CO2-CO转化
DOI:
10.1016/j.apcatb.2020.119156
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发表时间:
2020-11
期刊:
影响因子:
--
通讯作者:
Liu Zheng
中科院分区:
文献类型:
--
作者:
Guo Shasha;Di Jun;Chen Chao;Zhu Chao;Duan Meilin;Lian Cheng;Ji Mengxia;Zhou Weiqiang;Xu Manzhang;Song Pin;Long Ran;Cao Xun;Gu Kaizhi;Xia Jiexiang;Liu Honglai;Zhao Yanli;Song Li;Xiong Yujie;Li Shuzhou;Liu Zheng
Photocatalytic CO2reduction suffers from the weakness of high energy barrier, low efficiency and poor selectivity. Exploring effective strategy to enhance the adsorption and activation behavior of CO2molecules is an alternative approach to boost CO2photoreduction performance. In this work, abundant oxygen vacancies (VO) are introduced onto Bi2Sn2O7nanoparticles (NPs) by decreasing their size down to about 4 nm. The VOmediated NPs exhibit a tremendous 8.1 times enhanced performance than the bulk counterpart towards CO2-to−CO conversion in pure water. This is attributed to fast charge diffusion and abundant Vo for effective CO2adsorption and activation in the ultra-small nanoparticles. The VOmediated Bi2Sn2O7NPs have electron back donation nature and optimized electronic structure for effectively activating CO2, which were demonstrated by density functional theory calculations. During the reduction process, the Vo can effeciently stabilize the COOH* intermediates, and also lower the energy barrier of CO desorption determining step.
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通讯作者:
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