摘要
Pt基异质结构具有与单一相材料不同的物理和化学性质.本研究巧妙地设计了一种非金属g C3N4和Pt的异质结构,并将其负载在三维石墨烯网状结构上作为甲醇氧化的催化剂.由于Pt和g C3N4之间的协同作用,结合三维多孔石墨烯作为导电载体,为活性位点接触燃料分子提供了最大限度的可能,使得到的催化剂表现出异常优越的性能,包括高的催化活性、不同寻常的抗CO中毒能力,以及良好的稳定性.这些性能优于商业化的碳负载Pt催化剂以及三维石墨烯负载Pt催化剂.
Pt heterostructures can have distinctly different physical and chemical properties to their single-phase components. Herein,a smart approach was developed for the large-scale production of graphitic C3N4–Pt(gC 3N4–Pt) heterostructures on three-dimensional(3D) graphene sheet networks for highly efficient methanol oxidation. Because the gC 3N4–Pt heterostructures on the conductive 3D graphene network support provide the methanol molecules good accessibility to the active sites,the obtained catalyst exhibits excellent electrocatalytic performance,including high catalytic activity,unusual CO tolerance,and good stability,and is superior to commercial Pt/C and Pt/graphene catalysts for methanol oxidation.
基金
supported by the Ministry of Science and Technology of China (2011CB013000)
the National Natural Science Foundation of China (21325415,21174019 and 51161120361)
Beijing Natural Science Foundation(2152028)
the Fok Ying Tong Education Foundation (131043)
the 111 Project (807012)
