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Non-Metallic Phosphorus Corrole as Efficient Electrocatalyst in Hydrogen Evolution Reaction.

Gang Yang1, Jing-He Cen1, Jian Lan1

  • 1Department of Chemistry, Guangdong Provincial Key Laboratory of Fuel Cell Technology & School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R. China.

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Summary

A novel phosphorus(V) corrole complex, [(TPFC)PV (OH)2 ], effectively catalyzes the hydrogen evolution reaction (HER). This sustainable electrocatalyst shows high activity using both organic and aqueous proton sources, offering a promising alternative for clean energy applications.

Keywords:
electrocatalysishomogeneous catalysishydrogen evolutionmolecular catalystphosphorus

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Area of Science:

  • Inorganic Chemistry
  • Electrocatalysis
  • Sustainable Energy

Background:

  • Developing economical and sustainable electrocatalysts is crucial for energy applications.
  • Non-precious metal complexes offer a viable alternative to expensive noble metal catalysts.
  • The hydrogen evolution reaction (HER) is a key process for producing clean hydrogen fuel.

Purpose of the Study:

  • To investigate the potential of a phosphorus(V) corrole complex, [(TPFC)PV (OH)2 ], as an electrocatalyst for HER.
  • To explore the catalytic mechanism and performance of the complex with different proton sources.
  • To assess the economic viability and sustainability of using such complexes in energy-related fields.

Main Methods:

  • Synthesis and characterization of the phosphorus(V) corrole complex [(TPFC)PV (OH)2 ].
  • Electrochemical studies including cyclic voltammetry and chronoamperometry to evaluate HER activity.
  • Determination of reaction pathways (ECEC) and catalytic intermediates.
  • Quantification of turnover frequency (TOF) under various conditions (DMF/TFA and acetonitrile/water).

Main Results:

  • The complex [(TPFC)PV (OH)2 ] demonstrated significant electrocatalytic activity for HER.
  • The HER mechanism was identified as ECEC, with a proposed [PV ]-H intermediate.
  • High TOF values of 31.75 s-1 (in DMF/TFA) and 18.40 mol·molcat-1·h-1 (in acetonitrile/water) were achieved at 900 mV overpotential.
  • The catalyst maintained excellent performance even with water as the proton source.

Conclusions:

  • The phosphorus(V) corrole complex is a highly effective and sustainable electrocatalyst for HER.
  • The catalyst's ability to operate with water as a proton source enhances its practical applicability.
  • This research presents a promising, economical alternative to precious metal catalysts for hydrogen production.