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Angewandte Chemie v.130 no.29, 2018년, pp.9091 - 9095  

Confined Ultrathin Pd‐Ce Nanowires with Outstanding Moisture and SO2 Tolerance in Methane Combustion

Peng, Honggen (Institute of Applied Chemistry, College of Chemistry, Nanchang University, Nanchang, 330031, P. R. China ) ; Rao, Cheng (Institute of Applied Chemistry, College of Chemistry, Nanchang University, Nanchang, 330031, P. R. China ) ; Zhang, Ning (Institute of Applied Chemistry, College of Chemistry, Nanchang University, Nanchang, 330031, P. R. China ) ; Wang, Xiang (Institute of Applied Chemistry, College of Chemistry, Nanchang University, Nanchang, 330031, P. R. China ) ; Liu, Wenming (Institute of Applied Chemistry, College of Chemistry, Nanchang University, Nanchang, 330031, P. R. China ) ; Mao, Wenting (School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China ) ; Han, Lu (School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China ) ; Zhang, Pengfei ; Dai, Sheng ;
  • 초록  

    Abstract An efficient strategy (enhanced metal oxide interaction and core–shell confinement to inhibit the sintering of noble metal) is presented confined ultrathin Pd‐CeO x nanowire (2.4 nm) catalysts for methane combustion, which enable CH 4 total oxidation at a low temperature of 350 °C, much lower than that of a commercial Pd/Al 2 O 3 catalyst (425 °C). Importantly, unexpected stability was observed even under harsh conditions (800 °C, water vapor, and SO 2 ), owing to the confinement and shielding effect of the porous silica shell together with the promotion of CeO 2 . Pd‐CeO x solid solution nanowires (Pd‐Ce NW) as cores and porous silica as shells (Pd‐CeNW@SiO 2 ) 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).


  • 주제어

    Cer .   Feste Lösungen .   Kern-Schale-Materialien .   Methanoxidation .   Palladium.  

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