Related Experiment Video
Updated: Jun 12, 2026

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
Published on: October 3, 2018
Decoupling electron transfer defines a quantitative kinetic framework for oxygen evolution catalysis
Haoyin Zhong1, Junchen Yu1, Qi Zhang1
1Department of Materials Science and Engineering, National University of Singapore, Singapore, Singapore.
This study introduces a new method to measure oxygen evolution reaction kinetics, identifying key steps and catalyst roles. This accelerates the design of efficient electrocatalysts for energy conversion technologies.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Conversion Technologies
Background:
- Oxygen evolution reaction (OER) is crucial for energy technologies but limited by slow kinetics.
- Current catalyst design is empirical, lacking insight into elementary reaction steps.
Purpose of the Study:
- To develop a method for quantitatively determining the kinetics of elementary steps in OER.
- To establish a step-resolved kinetic framework for rational electrocatalyst design.
Main Methods:
- Utilized open-circuit voltage-pulse voltammetry to measure the rate of *OOH formation.
- Employed pulse voltammetry to quantify *OH deprotonation kinetics.
- Coupled these methods to create a unified kinetic framework.
Main Results:
- Quantified the *OOH formation rate, a rate-determining step in OER.
- Demonstrated that Fe primarily enhances *OOH formation, while Mn promotes *OH deprotonation.
- Developed a NiFeMn catalyst that improves both steps, enhancing OER performance.
Conclusions:
- The developed methodology allows for quantitative measurement of elementary reaction kinetics.
- Provides insights into how dopants selectively influence OER steps.
- Accelerates the discovery of high-performance electrocatalysts for energy conversion.
More Related Videos
09:00Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1
Published on: April 16, 2018
12:08Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry
Published on: March 18, 2012
Related Concept Videos
Redox Equilibria: Overview
Thermal and Photochemical Electrocyclic Reactions: Overview
Phase I Oxidative Reactions: Overview
Electron Transport Chains
The ETC is comprised of...
Processes at Electrodes
Reaction Mechanisms: Rate-limiting Step Approximation