Related Experiment Video
Updated: Jan 11, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Promoted O2 Activation at a CoIII Center for Significantly Improved Electrocatalytic Oxygen Reduction Reaction
Xialiang Li1, Xiaotong Jin1, Yuchen Cao2
1Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
Abstract:
Electrocatalytic oxygen reduction reaction (ORR) near its thermodynamic equilibrium potential is vital for efficient energy conversion. However, low-valent metal ions generated at high cathodic potentials are typically required to achieve effective O2 activation. Herein we report O2 activation promoted by a Sc3+-hung CoIII corrole, which realizes markedly boosted ORR electrocatalysis. CoIII corrole 1 with an appended crown ether substituent was synthesized. By grabbing a Sc3+ ion, the ORR overpotential with Sc3+-hung 1 decreased by 1.0 V in acetonitrile and 170 mV in 0.5 M H2SO4 solutions. Importantly, Sc3+-hung 1 achieved an ORR half-wave potential of 0.78 V vs RHE in 0.5 M H2SO4 solutions with a transferred electron number of 3.87. Our results suggest that the hanging Sc3+ promotes O2 binding and activation at the CoIII ion of 1 to generate a CoIII-superoxo-Sc3+ corrole cation radical and assists subsequent O-O bond cleavage by accepting the leaving hydroxide.
More Related Videos
09:02Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
08:40Synthesis 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
Related Concept Videos
Thermal and Photochemical Electrocyclic Reactions: Overview
Oxidation-Reduction Reactions
Phase I Oxidative Reactions: Overview
Electron Transport Chain: Complex III and IV
Oxidative Cleavage of Alkenes: Ozonolysis
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Oxidation and Reduction of Organic Molecules
The removal of an electron from a molecule, results in a...