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MoS2-rGO hybrid architecture as durable support for cathode catalyst in proton exchange membrane fuel cells

Chinese Journal of Catalysis 2019年第8期40卷 1160-1167页

作者： Muhammad Tuoqeer Anwar Xiaohui Yan Muhammad Rehman Asghar Naveed Husnain Shuiyun Shen Liuxuan Luo Xiaojing Cheng Guanghua Wei Junliang Zhang Institute of Fuel Cells School of Mechanical EngineeringMOE Key Laboratory of Power and Machinery EngineeringShanghai Jiao Tong UniversityShanghai 200240China COMSATS University Islamabad (Sahiwal Campus) Off G.T. Rd.SahiwalPunjab 57000Pakistan Institute of Thermal Energy Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China SJTU-ParisTech Elite Institute of Technology Shanghai Jiao Tong UniversityShanghai 200240China

Carbon black is utilized as a conventional electrocatalyst support material for proton exchange membrane fuel cells. However, this support is prone to corrosion under oxidative and harsh environments, thus limiting the durability of the fuel cells. Meanwhile, carbon corrosion would also weaken the linkage between Pt and the support material, which causes Pt agglomeration, and consequently, deterioration of the cell performance. To overcome the drawbacks of a Pt/C electrocatalyst, a hybrid support material comprising molybdenum disulfide and reduced graphene oxide is proposed and synthesized in this study to exploit the graphitic nature of graphene and the availability of the exposed edges of MoS2. TEM results show the uniform dispersion of Pt nanoparticles over the MoS2-rGO surface. Electrochemical measurements indicate higher ECSA retention and better ORR activity after 10000 potential cycles for Pt/MoS2-rGO as compared to Pt/C, demonstrating the improved durability for this hybrid support material.

关键词： Fuel cell hybrid catalyst support Carbon corrosion supported catalyst Pt-based electrocatalyst

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