Enhanced photocatalytic CO2 reduction with defective TiO2 nanotubes modified by single-atom binary metal components

被引：43
作者：
Pan, Honghui [1 ]
Wang, Xiaoguang [1 ]
Xiong, Zhiwei [1 ]
Sun, Minghui [1 ]
Murugananthan, Muthu [2 ]
Zhang, Yanrong [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Environm Sci Res Inst, Wuhan 430074, Peoples R China
[2] PSG Coll Technol, Dept Chem, Coimbatore 641004, Tamil Nadu, India
来源：
ENVIRONMENTAL RESEARCH | 2021年 / 198卷 / 198期
基金：
中国国家自然科学基金; 对外科技合作项目（国际科技项目）;
关键词：
Single atoms binary component; Metal support interactions; Self-doped Tio2 nanotubes; Photocatalytic CO2 reduction; CATALYSTS; NANOPARTICLES; COPPER; WATER;
D O I：
10.1016/j.envres.2021.111176
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A binary component catalyst consists of single atoms (SAs- Pt and Au) anchored on self-doped TiO2 nanotubes (TNTs), was developed for photocatalytic CO2 reduction. The defects introduced TNTs substrate was stabilized with atomic Pt and Au via strong metal support interactions (MSI), due to which, the covalent interactions facilitated an effective transfer of photo-generated electrons from the defective sites to the SAs, and in turn an enhanced separation of electron-hole pairs and charge-carrier transmission. The Pt-Au/R-TNTs with 0.33 wt% of SA metals, exhibited a maximum of 149 times higher photocatalytic performance than unmodified R-TNT and a total apparent quantum yield (AQY) of 17.9%, in which the yield of CH4 and C2H6 reached to 360.0 and 28.8 mu mol g-1 h-1, respectively. The metals loading shifted the oxidation path of H2O from center dot OH generation into O2 evolution, that inhibited the self-oxidization of the photocatalyst.
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页数：8
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