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Title: Confined Ultrathin Pd‐Ce Nanowires with Outstanding Moisture and SO 2 Tolerance in Methane Combustion

Journal Article · · Angewandte Chemie
 [1];  [2];  [2];  [2];  [2];  [3]; ORCiD logo [3];  [4]; ORCiD logo [5]
  1. Institute of Applied Chemistry College of Chemistry Nanchang University Nanchang 330031 P. R. China, Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37830 USA
  2. Institute of Applied Chemistry College of Chemistry Nanchang University Nanchang 330031 P. R. China
  3. School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China
  4. School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China, Department of Chemistry University of Tennessee Knoxville TN 37996 USA
  5. Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37830 USA, Department of Chemistry University of Tennessee Knoxville TN 37996 USA

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).

Sponsoring Organization:
USDOE
OSTI ID:
1460458
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Vol. 130 Journal Issue: 29; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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