Graphene-supported metal/metal oxide nanohybrids: synthesis and applications in heterogeneous catalysis

Graphene, a two dimensional (2D) material bearing a single layer of an sp(2) carbon atom network densely packed in a honeycomb structure, has attracted worldwide attention since its first experimental isolation in 2004. The unique properties of graphene, such as its large surface area, 2D structure, high adsorption capacity, excellent electrical and thermal conductivity, high mechanical strength, and easiness of modification, make it an ideal catalyst support. Therefore, research studies in this field are boosting and progress has been witnessed in the past few years. This review concentrates on recent advances in the synthesis and catalytic applications of graphene-supported metal/metal oxide nanohybrids and is woven around reactions including petrochemical, fine chemical, energy and environment-relevant reactions, with special emphasis on the contribution of graphene to the catalytic performance. Finally, a brief summary and an outlook on some of the scientific challenges and opportunities in this field are given.