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Related Concept Videos

Catalysis02:50

Catalysis

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The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
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Heterogeneous Catalysis01:22

Heterogeneous Catalysis

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Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
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Cation-Site Disordered Cu3PdN Nanoparticles for Hydrogen Evolution Electrocatalysis.

Sani Y Harouna-Mayer1,2, Jagadesh Kopula Kesavan1,2, Francesco Caddeo1

  • 1Institute for Nanostructure and Solid-State Physics, Center for Hybrid Nanostructures (CHyN), University of Hamburg, 22761, Hamburg, Germany.

Small (Weinheim an Der Bergstrasse, Germany)
|June 20, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a one-pot synthesis for 3 nm copper-palladium nitride (Cu3PdN) nanoparticles. These novel nanoparticles show potential for optoelectronics and catalysis, with unique structural properties and efficient hydrogen evolution activity.

Keywords:
anti‐perovskite structurecation disorderdouble‐edge EXAFS refinementhydrogen evolution reactionin situ X‐ray absorption and scattering studiesternary metal nitrides

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Inorganic Chemistry

Background:

  • Transition metal nitrides (TMNs) are promising for optoelectronics and energy applications.
  • Their full potential is limited by a lack of mechanistic understanding in synthesis.
  • Copper-palladium nitride (Cu3PdN) is an underexplored TMN material.

Purpose of the Study:

  • To develop a rapid, one-pot synthesis for phase-pure Cu3PdN nanoparticles.
  • To elucidate the mechanistic pathways of Cu3PdN formation and nanocrystal growth.
  • To investigate the structural properties and catalytic activity of the synthesized Cu3PdN nanoparticles.

Main Methods:

  • One-pot synthesis using copper methoxide and palladium acetylacetonate in benzylamine.
  • In situ X-ray absorption spectroscopy (XAS) to study complex conversion and structure.
  • In situ total X-ray scattering (TXS) to reveal nucleation and growth mechanisms.
  • Extended X-ray absorption fine structure (EXAFS) double-edge refinement for detailed structural analysis.
  • Electrocatalytic testing for hydrogen evolution reaction (HER).

Main Results:

  • Successfully synthesized 3 nm phase-pure Cu3PdN nanoparticles in 5 minutes at 140 °C.
  • Mechanistic insights into nucleation and growth provided by in situ XAS and TXS.
  • Discovered novel short-range cation-site disorder in the anti-perovskite structure of Cu3PdN.
  • Achieved a low overpotential of 212 ± 11 mV for hydrogen evolution reaction at 10 mA cm⁻².

Conclusions:

  • A facile and rapid one-pot synthesis for Cu3PdN nanoparticles has been established.
  • The study provides crucial mechanistic understanding of TMN formation.
  • The unique structural disorder and promising HER activity highlight Cu3PdN as a material of significant interest for energy applications.