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Heterogeneous Catalysis01:22

Heterogeneous Catalysis

141
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...
141

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2D Co-Mo-Hydroxide-Based Multifunctional Material for the Development of H2-Based Clean Energy Technologies.

Daniel Muñoz-Gil1, Celia Castillo-Blas2, Dawid Krystian Feler1

  • 1Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Madrid, 28040, Spain.

Advanced Materials (Deerfield Beach, Fla.)
|October 24, 2025
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Summary
This summary is machine-generated.

This study introduces a novel cobalt layered double hydroxide (LDH) material with interleaved molybdate anions. This dual-function material enhances hydrogen production electrocatalysis and offers magnetocaloric cooling near the liquid hydrogen range.

Keywords:
2D transition metal oxidesdouble layers hydroxidesmagnetocaloric effectoxygen evolution reaction (OER)pair distribution function (PDF)

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Clean Energy

Background:

  • Layered double hydroxides (LDHs) are versatile 2D materials for energy applications.
  • Developing efficient electrocatalysts and sustainable refrigerants is crucial for clean energy.

Purpose of the Study:

  • To create a multifunctional material combining electrochemical and magnetocaloric properties.
  • To investigate anion substitution in cobalt LDH for enhanced performance.

Main Methods:

  • Synthesized interstratified cobalt LDH nanosheets with (poly)oxomolybdate anions.
  • Characterized the material's structure, electrochemical activity, and magnetocaloric properties.

Main Results:

  • Achieved intercalation of molybdate species up to a Co:Mo ratio of 1:0.4.
  • Observed enhanced oxygen evolution reaction kinetics for H2 production due to expanded interlayer spacing and modified cobalt oxidation states.
  • Demonstrated strengthened superexchange interactions, tuning magnetocaloric properties to the 20-30 K range.

Conclusions:

  • The developed cobalt LDH material exhibits dual functionality for electrocatalysis and magnetocaloric cooling.
  • This material presents a sustainable alternative for hydrogen production and cryogenic refrigeration.