1. Institute of Fuel Cells, Shanghai Jiao Tong University, Shanghai 200240, China 2. School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China 3. Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Lyngby, Denmark
The platinum nanowires have been verified to be a promising catalyst to promote the performance of proton exchange membrane fuel cells. In this paper, accurately controlled growth of nanowires in a carbon matrix is achieved for reducing Pt loading. The effects of formic acid concentration and reaction temperature on the morphology and size of the Pt nanowires, as well as their electrochemical performances in a single cell, are investigated. The results showed that the increase in the formic acid concentration results in a volcano trend with the length of Pt nanowires. With increasing reduction temperature, the diameter of Pt nanowires increases while Pt particles evolve from one-dimensional to zero-dimensional up to 40 °C. A mechanism of the Pt nanowires growth is proposed. The optimized Pt nanowires electrode exhibits a power density (based on electrochemical active surface area) 79% higher than conventional Pt/C one. The control strategy obtained contributes to the design and control of novel nanostructures in nano-synthesis and catalyst applications.
. [J]. Frontiers of Chemical Science and Engineering, 2022, 16(3): 364-375.
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