Coupled Palladium–Tungsten Bimetallic Nanosheets/TiO2 Hybrids with Enhanced Catalytic Activity and Stability for the Oxidative Removal of Benzene

• DOI: 10.1021/acs.est.9b00370
• Publication Date: 2019-04-30T11:24:44Z
• Authors: Yijing Liang; Yuxi Liu; Jiguang Deng; Kunfeng Zhang; Zhiquan Hou; Xingtian Zhao; Xing Zhang; Kaiyue Zhang; Rujian Wei; Hongxing Dai
• Keywords: Bimetallic strip; Space velocity

Since the conventional Pd-based catalysts often suffer severe deactivation by water, development of a catalyst with good activity and moisture-resistance ability is importance in effectively controlling emissions volatile organic compounds (VOCs). Herein, we report efficient synthesis ultrathin palladium-tungsten bimetallic nanosheets exceptionally high dispersion tungsten species. The supported (TiO2/PdW) shows performance for benzene oxidation, 90% conversion achieved at temperature 200 °C space velocity 40 000 mL g-1 h-1. TiO2/PdW also exhibits better water-tolerant than traditional Pd/TiO2 catalyst. catalytic efficiency can be explained facile redox cycle active Pd2+/Pd0 couple close-contact PdO x-WO x-TiO2 arrangement. We propose that reason tolerance to water lattice oxygen replenish x sites consumed oxidation. A four-step transformation mechanism promoted proposed. present work provides useful idea rational design removal VOCs under humidity conditions.