Related Experiment Video
Updated: Aug 19, 2025
Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Three-Dimensional Au(NiMo)/Ti Catalysts for Efficient Hydrogen Evolution Reaction.
Sukomol Barua1, Aldona Balčiūnaitė1, Jūrate Vaičiūnienė1
1Department of Catalysis, Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, Lithuania.
This study developed gold-decorated nickel-molybdenum (NiMo) catalysts on titanium for efficient hydrogen evolution reaction (HER) in alkaline solutions. The best catalyst achieved a low overpotential, demonstrating enhanced performance with increasing temperature.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Hydrogen evolution reaction (HER) is crucial for clean energy production.
- Developing efficient and cost-effective electrocatalysts is essential for alkaline HER.
- Nickel-molybdenum (NiMo) alloys show promise as HER electrocatalysts.
Purpose of the Study:
- To synthesize and characterize electrodeposited NiMo catalysts decorated with gold (Au) crystallites.
- To evaluate the catalytic performance of Au(NiMo)/Ti catalysts for HER in an alkaline medium.
- To investigate the effect of temperature on the HER activity of these catalysts.
Main Methods:
- Electrodeposition of NiMo catalysts on Ti substrates with varying metal loadings.
- Decoration of NiMo catalysts with Au crystallites using the galvanic displacement method.
- Electrochemical evaluation of HER performance in an alkaline electrolyte at different temperatures.
Main Results:
- The Au(NiMo)/Ti-3 catalyst, with 5.2 µg cm-2 Au loading, exhibited the lowest overpotential (252 mV at 10 mA·cm-2) for HER.
- HER current densities increased with temperature from 25 °C to 75 °C.
- Both NiMo/Ti and Au(NiMo)/Ti catalysts showed enhanced performance at higher temperatures.
Conclusions:
- Gold decoration significantly enhances the HER activity of NiMo catalysts in alkaline media.
- The optimized Au(NiMo)/Ti catalyst demonstrates superior performance for efficient hydrogen production.
- Temperature plays a positive role in improving the catalytic activity for HER.
More Related Videos
12:08Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
Published on: June 24, 2022
06:32A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
Related Concept Videos
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
02:50Catalysis
02:13Reduction of Alkenes: 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...
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.