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

Honggen Peng; Cheng Rao; Ning Zhang; Xiang Wang; Wenming Liu; Wenting Mao; Lu Han; Pengfei Zhang; Sheng Dai

doi:10.1002/anie.201803393

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

Honggen Peng, Cheng Rao, Ning Zhang, Xiang Wang, Wenming Liu, Wenting Mao, Lu Han, Pengfei Zhang, Sheng Dai

Chemical Sciences Division

Research output: Contribution to journal › Article › peer-review

149 Scopus citations

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 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-CeO_x 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).

Original language	English
Pages (from-to)	8953-8957
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	57
Issue number	29
DOIs	https://doi.org/10.1002/anie.201803393
State	Published - Jul 16 2018

Funding

HP, CR, NZ, XW, WL, WM, and LH were supported by the National Key R&D Program of China (2016YFC0205900), the National Natural Science Foundation of China (21503106, 21567016, and 21773106), the Natural Science Foundation of Jiangxi Province (20171BCB23016 and 20171BAB203024), and the Foundation of State Key Laboratory of Coal Clean Utilization and Ecological Chemical Engineering (Grant No. 2016-15). PZ and SD were supported by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy. HP, CR, NZ, XW, WL, WM, and LH were supported by the National Key R&D Program of China (2016YFC0205900), the National Natural Science Foundation of China (21503106, 21567016, and 21773106), the Natural Science Foundation of Jiangxi Province (20171BCB23016 and 20171BAB203024), and the Foundation of State Key Laboratory of Coal Clean Utilization and Ecological Chemical Engineering (Grant No. 2016-15). PZ and SD were supported by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy. The authors gratefully acknowledge Dr. Yuan Wang from the University of New South Wales and Duanjian Tao from the Jiangxi Normal University for their constructive suggestions during revision of this manuscript.

Keywords

cerium
core–shell materials
methane oxidation
palladium
solid solutions

Access to Document

10.1002/anie.201803393

Cite this

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title = "Confined Ultrathin Pd-Ce Nanowires with Outstanding Moisture and SO2 Tolerance in Methane Combustion",

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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author = "Honggen Peng and Cheng Rao and Ning Zhang and Xiang Wang and Wenming Liu and Wenting Mao and Lu Han and Pengfei Zhang and Sheng Dai",

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AU - Wang, Xiang

AU - Liu, Wenming

AU - Mao, Wenting

AU - Han, Lu

AU - Zhang, Pengfei

AU - Dai, Sheng

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