| Title: | Coupled Palladium-Tungsten Bimetallic Nanosheets/TiO(2) Hybrids with Enhanced Catalytic Activity and Stability for the Oxidative Removal of Benzene |
| Author(s): | Liang Y; Liu Y; Deng J; Zhang K; Hou Z; Zhao X; Zhang X; Zhang K; Wei R; Dai H; |
| Address: | "Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering , Beijing University of Technology , Beijing 100124 , P. R. China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Since the conventional Pd-based catalysts often suffer severe deactivation by water, development of a catalyst with good activity and moisture-resistance ability is of importance in effectively controlling emissions of volatile organic compounds (VOCs). Herein, we report the efficient synthesis of ultrathin palladium-tungsten bimetallic nanosheets with exceptionally high dispersion of tungsten species. The supported catalyst (TiO(2)/PdW) shows good performance for benzene oxidation, and 90% conversion is achieved at a temperature of 200 degrees C and a space velocity of 40?ª+000 mL g(-1) h(-1). The TiO(2)/PdW catalyst also exhibits better water-tolerant ability than the traditional Pd/TiO(2) catalyst. The high catalytic efficiency can be explained by the facile redox cycle of the active Pd(2+)/Pd(0) couple in the close-contact PdO (x)-WO (x)-TiO(2) arrangement. We propose that the reason for good tolerance to water is that the lattice oxygen of the TiO(2)/PdW catalyst can effectively replenish the oxygen in active PdO (x) sites consumed by benzene oxidation. A four-step benzene transformation mechanism promoted by the catalyst is proposed. The present work provides a useful idea for the rational design of efficient bimetallic catalysts for the removal of VOCs under the high humidity conditions" |
| Keywords: | Benzene Catalysis Oxidation-Reduction Oxidative Stress *Palladium *Tungsten; |
| Notes: | "MedlineLiang, Yijing Liu, Yuxi Deng, Jiguang Zhang, Kunfeng Hou, Zhiquan Zhao, Xingtian Zhang, Xing Zhang, Kaiyue Wei, Rujian Dai, Hongxing eng Research Support, Non-U.S. Gov't 2019/05/01 Environ Sci Technol. 2019 May 21; 53(10):5926-5935. doi: 10.1021/acs.est.9b00370. Epub 2019 May 9" |
