4.6 Article

High Oxygen Reduction Activity of Pt-Ni Alloy Catalyst for Proton Exchange Membrane Fuel Cells

Journal

CATALYSTS
Volume 12, Issue 3, Pages -

Publisher

MDPI
DOI: 10.3390/catal12030250

Keywords

PEMFCs; electrocatalyst; Pt-Ni alloy; high metal loading; oxygen reduction reaction

Funding

  1. Fundamental Research Funds for the Central Universities [020414380168]
  2. 2021 Nantong Municipal Basic Science Research Project [JC2021109]

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A PtNi/C alloy nano-catalyst with metal loading more than 50 wt.% and core-shell like structure was successfully prepared by ethylene glycol reduction, high temperature annealing, and acid pickling. The electrochemical test results showed that the catalyst had excellent electrochemical activity, and after 30K cycles of accelerated durability test, it still maintained high activity.
In order to fill the research gap of high metal loading of high performance PtNi alloy catalysts, a PtNi/C alloy nano-catalyst with metal loading more than 50 wt.% and core-shell like structure was prepared by ethylene glycol reduction, high temperature annealing, and acid pickling. The electrochemical test results showed that the prepared PtNi alloy catalyst had excellent electrochemical activity: the electrochemical surface area (ECSA) was 63.8 m(2)center dot g(Pt)(-1), and the mass activity (MA) was 0.574 A center dot mg(Pt)(-1), which is 2.73 times greater than those of the Pt/C JM (Johnson Matthey) catalyst. The durability of the PtNi/C catalyst was further investigated. After 30 K cycles of accelerated durability test, the ECSA and MA of the PtNi/C alloy catalyst decreased by 10.2% and 31.2%, respectively. The PtNi/C alloy catalyst prepared in this study has excellent catalytic activity and overcomes the problem of insufficient durability of traditional alloy catalysts and has the potential for large-scale commercial application.

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