Oxidation of methanol not only eliminates contamination due to typical volatile organic compounds (VOCs), but also provides clean energy. Here, we report Ag/white graphene foam to act as a catalyst for the oxidation reaction of methanol with both high conversion efficiency and high stability. The T50 and T95 of the Ag/white graphene foam catalyst are as low as 50 °C and 110 °C, almost half that of Ag/γ-Al2O3 catalysts. Furthermore, when the temperature was fixed at 100 °C, the 93% conversion efficiency of the Ag/white graphene foam was maintained with a fluctuation of less than 2% over 50 hours, while the conversion efficiency of Ag/γ-Al2O3 degraded sharply from 46% to 30%. Such outstanding catalytic performance of the Ag/white graphene foam is mainly attributed to the unique microstructure, especially the multi-level pores and few-layer atomically thin walls, which has been well confirmed by the SEM and TEM observations.
