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Promoting the Phosphidation Process using an Oxygen Vacancy Precursor for Efficient Hydrogen Evolution Reaction.

Xiaoxiao Li1,2, Jingbo Xing1,2, Junwei Chen1,2

  • 1College of Rare Earth, Jiangxi University of Science and Technology, Ganzhou, 341000, P. R. China.

Chemistry, an Asian Journal
|September 10, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method to improve transition metal phosphides (TMPs) catalysts by utilizing crystal defects. The new approach enhances phosphidation for superior hydrogen evolution activity.

Keywords:
CatalystFePHydrogen evolution reactionOxygen vacancyPhosphidation

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Area of Science:

  • Materials Science
  • Catalysis
  • Electrochemistry

Background:

  • Traditional synthesis of transition metal phosphides (TMPs) often results in incomplete phosphidation.
  • Crystal defects offer a potential strategy to enhance phosphidation degrees.

Purpose of the Study:

  • To develop an innovative method for preparing highly phosphidated transition metal phosphides.
  • To investigate the role of oxygen vacancies in enhancing phosphidation and catalytic activity.

Main Methods:

  • Fabrication of oxygen-vacancy iron oxide/iron foam (Ov-Fe2O3/IF) via vacuum heating.
  • Phosphation of Ov-Fe2O3/IF to form FeP/IF.
  • Evaluation of the hydrogen evolution activity of the synthesized FeP/IF catalyst.

Main Results:

  • Oxygen vacancies were successfully introduced into iron oxide/iron foam.
  • Complete phosphidation of oxygen-vacancy iron oxide was achieved, yielding FeP/IF.
  • The resulting FeP/IF catalyst exhibited exceptional hydrogen evolution activity.

Conclusions:

  • The use of oxygen vacancies is an effective strategy to enhance phosphidation in TMPs.
  • This method provides a feasible route for synthesizing high-performance catalysts.
  • The developed FeP/IF catalyst shows great potential for hydrogen evolution reactions.