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论文类型：期刊论文

发表时间：2015-04-01

发表刊物：CHEMCATCHEM

收录刊物：SCIE、EI、Scopus

卷号：7

期号：7

页面范围：1070-1077

ISSN号：1867-3880

关键字：dehydrogenation; dispersant and precursor; doping; hybrid nanocomposites; oxygen reduction reaction

摘要：Owing to their unique structural features and surface properties, graphene and nanodiamond have attracted tremendous attention in diverse fields. However, restacking of graphene and reagglomeration of dispersed nanodiamond inevitably depress their catalytic properties. Herein, inspired by the historic discovery of pillared clay, we successfully realized the simultaneous inhibition of their restacking by fabricating a N-doped mesoporous graphene/nanodiamond (N-RGO/ND) nanocomposite by a facile wet-chemical approach. The electrocatalytic oxygen reduction reaction (ORR) and the thermocatalytic oxidant-free and steam-free direct dehydrogenation (DDH) of ethylbenzene were used to examine its catalytic properties. The nanocomposite showed synergistically improved catalytic DDH and electrocatalytic ORR activity relative to that of the individual components, which can be ascribed to synergy between graphene and nanodiamond and to the large surface area, well-ordered mesoporous structure, small crystalline size, and rich defect and CO surface features. Moreover, the developed synthetic strategy in this work can be extended to diverse N-doped nanocomposites from dispersion-required carbon precursors.