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Related Concept Videos

Catalysis02:50

Catalysis

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.
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

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...
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the surface of...

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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
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Surface reconstruction-driven WCuNiMo alloy for efficient ammonia oxidation and hydrogen evolution.

Fozia Sultana1, Jichao Shi2, Renkun Li1

  • 1State Key Laboratory of Bio-based Fiber Materials, School of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China. lirenhong@zstu.edu.cn.

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|May 18, 2026
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Summary

A novel WCuNiMo alloy catalyst efficiently produces hydrogen via ammonia oxidation and evolution reactions. Post-treatment atmosphere critically influences its nanostructure and electrocatalytic performance for renewable energy applications.

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Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Renewable Energy

Background:

  • Global shift to renewable energy requires efficient electrocatalysts for sustainable hydrogen production.
  • Ammonia oxidation reaction (AOR) and hydrogen evolution reaction (HER) are key processes for green hydrogen generation.

Purpose of the Study:

  • To synthesize and characterize a multimetallic WCuNiMo catalyst for bifunctional AOR and HER.
  • To investigate the effect of post-treatment atmosphere on catalyst structure and performance.
  • To evaluate the catalyst's efficiency in an alkaline electrolyzer for hydrogen production and ammonia remediation.

Main Methods:

  • Hydrothermal-calcination synthesis of WCuNiMo catalyst.
  • Post-treatment under reductive (H2/Ar) and oxidative (air) atmospheres.
  • Electrochemical characterization (cyclic voltammetry, linear sweep voltammetry, electrochemical impedance spectroscopy).
  • In situ Fourier-transform infrared (FTIR) spectroscopy.
  • Assembly and testing of a model alkaline electrolyzer.

Main Results:

  • WCuNiMo alloy exhibits nanostructured architecture, enhanced conductivity, and active sites.
  • Catalyst shows superior bifunctional activity for AOR (1.37 V at 100 mA cm-2) and HER (186 mV at 10 mA cm-2).
  • Electrolyzer with WCuNiMo catalyst achieves 1.67 V at 100 mA cm-2, high H2 evolution rate, and 64% ammonia removal over 24 hours.

Conclusions:

  • Calcination atmosphere significantly impacts catalyst structure and electrocatalytic functionality.
  • The WCuNiMo alloy is a promising catalyst for efficient hydrogen production and ammonia wastewater treatment.
  • Synergistic electronic interactions and structural features drive the catalyst's high performance.