| Title: | Tuning the local electronic structure of SrTiO(3) catalysts to boost plasma-catalytic interfacial synergy |
| Author(s): | Wu K; Xiong J; Sun Y; Wu J; Fu M; Ye D; |
| Address: | "School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China. School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, PR China. School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou 510006, PR China. School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou 510006, PR China. Electronic address: cedqye@scut.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2021.128172 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Boosting plasma-catalyst synergy to enhance volatile organic compounds (VOCs) decomposition remains a challenge. Herein, rich oxygen vacancies (V(O)) were engineered into the SrTiO(3) catalysts through a facile nitrogen incorporation strategy for the plasma-catalytic decomposition of toluene and ethyl acetate. 100% toluene conversion with 81% CO(2) selectivity at a competitive energy efficiency was achieved under ambient conditions. The characterization results and theoretical calculations evidenced that the partial substitution of oxygen by nitrogen triggered the electronic reconstruction and local disorder, thus modulating the electronic properties and coordination structures contributed to the formation of V(O)-Ti(3+) pairs. Quasi in-situ EPR, operando OES, and operando DRIFTS originally demonstrated that the V(O)-Ti(3+) pairs as active sites promoted the plasma-catalytic synergy instead of isolated V(O). Importantly, the V(O)-Ti(3+) pairs with favorable electron transfer characteristics energetically preferred to capture and utilize vibrationally excited oxygen species. And the lattice oxygen supplied by the V(O)-Ti(3+) pairs were more vigorously activated by the plasma to participate in the surface/interface reaction. This work advances our understanding of the real active sites in plasma-catalytic interfacial synergy and thus paving the way for the rational design of efficiently heterogeneous catalysts" |
| Keywords: | Local electronic structure Operando characterization Plasma catalysis Synergy Voc; |
| Notes: | "PubMed-not-MEDLINEWu, Kang Xiong, Juxia Sun, Yuhai Wu, Junliang Fu, Mingli Ye, Daiqi eng Netherlands 2022/01/11 J Hazard Mater. 2022 Apr 15; 428:128172. doi: 10.1016/j.jhazmat.2021.128172. Epub 2021 Dec 29" |
