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

Abstract Plagued by low surface area and limited oxidation activity at low temperature, perovskite‐type LaMnO 3 based catalysts also suffer from poor hydrothermal stability. In this communication, mesoporous nanotube arrays of LaMnO 3 ‐Pt were successfully derived from core/shell nanorod arrays with significantly increased surface area through diluted acid etching. Surface Mn 4+ 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.