Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Catalysis

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.

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Inherently Conducting Polymeric Materials from Conjugated Polyisoprene-Based Rubbers.

ACS applied materials & interfaces·2026

Same author

Transforming disorder in the design of advanced high-entropy oxide electrocatalysts for zinc-air batteries.

Nature communications·2026

Same author

Approaching the Sabatier optimum <i>via</i> a triple-defect synergistic strategy for enhanced oxygen evolution reaction.

Materials horizons·2025

Same author

Thousand-hour salt precipitation-free CO<sub>2</sub>-to-ethylene electrosynthesis at high current densities.

Nature communications·2025

Same author

Copper-stabilized bismuth subcarbonate electrocatalysts for durable large-scale formate production at kilowatt power.

Nature communications·2025

Same author

Recent Developments in Solid-State Electrolytes for Advanced Energy Storage Devices.

ACS nano·2025

Search research articles

Related Experiment Video

Updated: Jun 4, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

An efficient hydrogen evolution catalyst constructed using Pt-modified Ni₃S₂/MoS₂ with optimized kinetics across the

Maoyuan Li¹, Zhongrui Yu², Zulin Sun¹

¹School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China. binliu@shu.edu.cn.

|December 24, 2024

Summary

Platinum modification enhances Ni3S2/MoS2 heterostructures for efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalysis across all pH levels. This boosts electrocatalyst performance for energy conversion technologies.

More Related Videos

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

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

Published on: July 18, 2017

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Published on: June 21, 2017

Related Experiment Videos

Last Updated: Jun 4, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

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

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

Published on: July 18, 2017

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Published on: June 21, 2017

Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

Electrocatalyst materials are vital for hydrogen evolution reaction (HER) efficiency in energy conversion.
Ni3S2/MoS2 heterostructures show promise as bifunctional catalysts but are limited by hydrogen intermediate chemisorption energies.
Catalyst performance is pH-dependent, hindering broad applicability.

Purpose of the Study:

To enhance the bifunctional catalytic activity of Ni3S2/MoS2 heterostructures for HER and OER.
To overcome the limitations of high chemisorption energies in varying pH environments.
To investigate the role of trace platinum (Pt) modification in improving electrocatalytic performance.

Main Methods:

Synthesis of Pt-modified Ni3S2/MoS2 heterostructures.
Electrochemical characterization of HER and OER activities across a wide pH range.
Theoretical simulations to analyze electronic structure and catalytic mechanisms.

Main Results:

Pt-modified Ni3S2/MoS2 achieved low overpotentials for HER: 64 mV (acidic) and 83 mV (alkaline) at 100 mA cm-2.
Enhanced electrocatalytic activity for both HER and OER was observed in acidic, neutral, and alkaline media.
Theoretical simulations confirmed optimized electronic configurations and augmented electron transfer upon Pt modification.

Conclusions:

Trace Pt modification significantly improves the HER and OER performance of Ni3S2/MoS2 heterostructures.
The Pt-modified catalyst exhibits excellent pH-universal bifunctional catalytic activity.
This work paves the way for practical applications of advanced electrocatalysts in energy conversion.