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Effects of Preformed Pt Nanoparticles on Structure of Platinum Nanowire Cathode for Proton Exchange Membrane Fuel Cells |
Author Name | Affiliation | E-mail | WANG Hao-Jie | School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China | | WANG Rui-Qing | Institute of Fuel Cells, Shanghai Jiao Tong University, Shanghai 200240, China | | LI Bing | School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China | bingli@ecust.edu.cn | SUI Sheng | Institute of Fuel Cells, Shanghai Jiao Tong University, Shanghai 200240, China | ssui@sjtu.edu.cn |
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Abstract: Pt nanowires (Pt NWs) have been demonstrated to have a higher specific activity of oxygen reduction reaction (ORR) than that of commercial Pt/C due to their unique structural characteristics. In this work, a cathode with a uniform distribution of Pt NWs was obtained by introducing preformed Pt nanoparticles (NPs) into the carbon matrix to induce Pt NW growth. The structure and performance of the as-prepared cathode were investigated by altering Pt NP loadings (0-0.015 mg·cm-2) and Pt NP sources (Pt/C with different Pt contents). The cathode surface was characterized by scanning electron microscopy (SEM), and the morphology and crystal structure of Pt NW were analyzed by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Polarization and cyclic voltammetry curves were obtained in single cells. The best single-cell performance, as well as the largest electrochemical surface area (ECSA) value was achieved by the cathode with preformed Pt NP loading of 0.005 mg·cm-2 originating from 40% Pt/C. Finally, a possible mechanism for the influence of preformed Pt NPs in the Pt NW distribution was proposed. |
Keywords: Pt nanowire cathode structure preformed Pt nanoparticle induced growth proton exchange membrane fuel cell |
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WANG Hao-Jie,WANG Rui-Qing,LI Bing,SUI Sheng.Effects of Preformed Pt Nanoparticles on Structure of Platinum Nanowire Cathode for Proton Exchange Membrane Fuel Cells[J].Chinese Journal of Inorganic Chemistry,2022,38(5):787-799. |
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