ChemCatChem 2018-01-26

Mesoporous Perovskite Nanotube-Array Enhanced Metallic-State Platinum Dispersion for Low Temperature Propane Oxidation

Sibo Wang, Shoucheng Du, Wenxiang Tang, Son Hoang, Xingxu Lu, Wen Xiao, Bo Zhang, Junfei Weng, Evan Schneer, Yanbing Guo, Jun Ding, Zhaoliang Zhang, Pu-Xian Gao

Index: 10.1002/cctc.201702048

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Abstract

Plagued by low surface area and limited oxidation activity at low temperature, perovskite-type LaMnO3 based catalysts also suffer from poor hydrothermal stability. In this communication, mesoporous nanotube arrays of LaMnO3-Pt were successfully derived from core/shell nanorod arrays with significantly increased surface area through diluted acid etching. Surface Mn4+ population is boosted to compensate La cation deficiency and enhance low temperature reducibility of nanotube arrays, enabling surface dispersion of abundant metallic-state Pt nanoparticles. As a result, significantly enhanced catalytic propane oxidation was achieved in such a new class of perovskite/Pt nanotube array integrated structured catalysts.