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B, P-co-doped PdCu nanothorn assemblies for enhanced oxygen reduction electrolysis.

Hongjing Wang1, Hongyong Chen1, Shuli Yin1

  • 1State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China.

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Summary

Nonmetal doping enhances electrocatalytic performance for the oxygen reduction reaction (ORR). Boron and phosphorus co-doped palladium-copper nanothorn assemblies (PdCuBP NTAs) show improved activity and stability.

Keywords:
dual-element dopingelectronic effectfuel cellnanothorn assemblyoxygen reduction reaction

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Nonmetal doping is a key strategy to enhance the electrocatalytic activity of noble metal catalysts.
  • The oxygen reduction reaction (ORR) is crucial for energy conversion devices, demanding efficient and stable catalysts.

Purpose of the Study:

  • To develop a facile method for fabricating nonmetal-doped noble metal nanocrystals.
  • To investigate the effect of co-doping boron (B) and phosphorus (P) on the ORR performance of palladium-copper (PdCu) nanocrystals.

Main Methods:

  • Fabrication of palladium-copper boron phosphorus nanothorn assemblies (PdCuBP NTAs) via co-doping.
  • Utilized sodium borohydride (NaBH4) as the boron source and sodium hypophosphite (NaH2PO2) as the phosphorus source.
  • Characterization of the nanothorn assemblies' structure and composition.

Main Results:

  • The synthesized PdCuBP NTAs possess a unique metal-nonmetal structure and multi-branched morphology.
  • Optimized oxygen adsorption energy and suppressed catalyst degradation mechanisms like migration and agglomeration.
  • Achieved efficient electrocatalytic activity and excellent long-term stability for the oxygen reduction reaction (ORR).

Conclusions:

  • Co-doping nonmetal elements into metal nanocrystals offers a viable strategy to improve electrocatalytic ORR performance.
  • The developed PdCuBP NTAs demonstrate superior activity and stability, paving the way for advanced catalyst design.
  • Controllable composition and structure are critical for enhancing catalyst efficiency in electrochemical applications.