“…Besides, the specific surface area using the BET equation is found to be 133.56 m 2 g -1 , the total pore volume, the average adsorption pore size being 0.11 cm 3 g -1 and 3.3 nm, respectively. The BET surface area is much higher than that of carbon-based nanomaterials, such as doped graphene nanosheets and hydrogenated carbon nanospheres [46,47]. The large surface area and mesoporous network can improve the transport of educts and products formed on the surface of catalysts, thereby increasing the performance of the catalysts and lowering the total cost of fuel cell systems [26,28].…”