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Related Experiment Video

Updated: Jun 9, 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

Single-Nanometer Spinel with Precise Cation Distribution for Enhanced Oxygen Reduction.

Long Shang¹, Youxuan Ni¹, Yuankun Wang¹

¹Frontiers Science Center for New Organic Matter, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), State Key Laboratory of Advanced Chemical Power Sources, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)

|October 22, 2024

Summary

This summary is machine-generated.

Researchers developed a new hot-injection method to create single-nanometer spinel nanocrystals. This breakthrough enables superior oxygen reduction reaction (ORR) performance and enhanced power density in zinc-air batteries.

Keywords:

oxygen reduction reaction restricted aggregation growth single nanometer spinel oxides structure engineering

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Last Updated: Jun 9, 2025

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

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Published on: April 27, 2018

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Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing

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Published on: June 9, 2023

Area of Science:

Materials Science
Nanotechnology
Electrochemistry

Background:

Designing spinel nanocrystals (NCs) with specific compositions and cation arrangements is vital for high catalytic activity.
Achieving precise control over NC structure, especially at the single-nanometer scale, remains a significant challenge.

Purpose of the Study:

To develop a novel method for synthesizing single-nanometer spinel NCs with tailored structures.
To investigate the structure-property relationships governing the catalytic performance of these NCs, particularly for the oxygen reduction reaction (ORR).

Main Methods:

An aggregation growth-restricted hot-injection technique was employed, focusing on nucleation and growth kinetics.
Controlled collision probability of nuclei during synthesis was utilized to achieve single-nanometer size.

Main Results:

Successfully synthesized single-nanometer (1.2 nm) CoMn2O4 spinel NCs with a highly tailored structure.
The synthesized NCs exhibited a maximized population of active octahedral Mn atoms, optimizing oxygen intermediate adsorption.
Achieved a remarkable half-wave potential of 0.88 V for ORR and a power density of 170.9 mW cm-2 in zinc-air batteries, surpassing commercial Pt/C catalysts.

Conclusions:

The developed method provides precise control over spinel NC synthesis, enabling the creation of advanced electrocatalysts.
The study highlights a clear structure-property relationship, demonstrating the potential of tailored spinel NCs for energy storage and conversion applications.