International Journal of Hydrogen Energy, Vol.45, No.7, 4875-4886, 2020
Pt-based catalyst decorated by bimetallic FeNi2P with outstanding CO tolerance and catalytic activity for methanol electrooxidation
Subjected to CO poisoning and weak catalytic performance, there are still large barriers to the effective use of direct methanol fuel cells. Therefore, bimetallic FeNi2P/C hybrid is synthesized by a facile hydrothermal method and low temperature phosphorization process. Subsequently, the as-synthesized FeNi2P/C is employed as catalytic support to load Pt nanoparticles. Due to the existence of phosphorus and the difunctional effects of Fe and Ni, electrochemical results demonstrate that the prepared Pt-FeNi2P/C compound exhibits an outstanding catalytic activity of 1125 mA.mg(-1) Pt during methanol oxidation in acid solution, tower over that of Pt-FeP4/C (721 mA.mg(pt)(-1)), Pt-Ni2P/C (588 mA.mg(pt)(-1)) and Pt/C-JM (284 mA.mg(pt)(-1)), separately. Significantly, bimetallic Pt-FeNi2P/C hybrid shows the optimal anti poisoning tolerance, which onset potential is negatively shifted 0.2 eV in comparison of Pt/C-JM. Hence, Pt-based catalyst decorated by bimetallic phosphides with excellent anti poisoning tolerance would be a superb material to flourish the catalytic field. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.