Confined Ultrathin Pd‐Ce Nanowires with Outstanding Moisture and SO2 Tolerance in Methane Combustion |
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| Authors: | Dr. Honggen Peng Cheng Rao Prof. Ning Zhang Xiang Wang Wenming Liu Wenting Mao Lu Han Prof. Pengfei Zhang Prof. Sheng Dai |
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| Affiliation: | 1. Institute of Applied Chemistry, College of Chemistry, Nanchang University, Nanchang, P. R. China;2. Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA;3. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China;4. Department of Chemistry, University of Tennessee, Knoxville, TN, USA |
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| Abstract: | An efficient strategy (enhanced metal oxide interaction and core–shell confinement to inhibit the sintering of noble metal) is presented confined ultrathin Pd‐CeOx nanowire (2.4 nm) catalysts for methane combustion, which enable CH4 total oxidation at a low temperature of 350 °C, much lower than that of a commercial Pd/Al2O3 catalyst (425 °C). Importantly, unexpected stability was observed even under harsh conditions (800 °C, water vapor, and SO2), owing to the confinement and shielding effect of the porous silica shell together with the promotion of CeO2. Pd‐CeOx solid solution nanowires (Pd‐Ce NW) as cores and porous silica as shells (Pd‐CeNW@SiO2) were rationally prepared by a facile and direct self‐assembly strategy for the first time. This strategy is expected to inspire more active and stable catalysts for use under severe conditions (vehicle emissions control, reforming, and water–gas shift reaction). |
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| Keywords: | cerium core– shell materials methane oxidation palladium solid solutions |
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