|
|||||
|
|
Co-Dissolved Isostructural Polyoxovanadates to Construct Single-Atom-Site Catalysts for Efficient CO2 Photoreduction |
|
| Authors: | Yu-Jie Wang Dr. Gui-Lin Zhuang Dr. Jiang-Wei Zhang Prof. Fang Luo Xin Cheng Fu-Li Sun Dr. Shan-Shan Fu Prof. Tong-Bu Lu Prof. Zhi-Ming Zhang |
| Affiliation: | 1. Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Northeast Normal University, Jilin, 130024 China Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin, 300384 China These authors contributed equally to this work.;2. Institute of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032 China These authors contributed equally to this work.;3. College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021 P. R. China These authors contributed equally to this work.;4. Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Northeast Normal University, Jilin, 130024 China These authors contributed equally to this work.;5. Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin, 300384 China;6. Institute of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032 China;7. Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Northeast Normal University, Jilin, 130024 China |
| Abstract: | We explored a co-dissolved strategy to embed mono-dispersed Pt center into V2O5 support via dissolving [PtV9O28]7− into [V10O28]6− aqueous solution. The uniform dispersion of [PtV9O28]7− in [V10O28]6− solution allows [PtV9O28]7− to be surrounded by [V10O28]6− clusters via a freeze-drying process. The V centers in both [PtV9O28]7− and [V10O28]6− were converted into V2O5 via a calcination process to stabilize Pt center. These double separations can effectively prevent the Pt center agglomeration during the high-temperature conversion process, and achieve 100 % utilization of Pt in [PtV9O28]7−. The resulting Pt-V2O5 single-atom-site catalysts exhibit a CH4 yield of 247.6 μmol g−1 h−1, 25 times higher than that of Pt nanoparticle on the V2O5 support, which was accompanied by the lactic acid photooxidation to form pyruvic acid. Systematical investigations on this unambiguous structure demonstrate an important role of Pt−O atomic pair synergy for highly efficient CO2 photoreduction. |
| Keywords: | CO2 Photoreduction Polyoxometalate Polyoxovanadate Single-Atom-Site Catalyst |