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Updated: Jul 19, 2025

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing

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Published on: June 9, 2023

Oxygen Vacancy and Interface Effect Adjusted Hollow Dodecahedrons for Efficient Oxygen Evolution Reaction.

Huan Wang¹, Qian Ma¹, Fengmin Sun¹

¹Hebei Key Laboratory of Flexible Functionals Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China.

Molecules (Basel, Switzerland)

|August 12, 2023

Summary

We developed cobalt-cerium composite oxide hollow dodecahedrons using metal-organic frameworks. These novel catalysts exhibit enhanced electrocatalytic oxygen evolution reaction (OER) performance due to their unique structure and composition.

Keywords:

cobalt–cerium composite oxide hollow dodecahedrons metal–organic frameworks oxygen evolution reaction phase interface

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Published on: July 31, 2016

Area of Science:

Materials Science
Catalysis
Nanotechnology

Background:

Metal-organic frameworks (MOFs) offer tunable structures for advanced catalytic applications.
Developing efficient electrocatalysts is crucial for energy conversion technologies.

Purpose of the Study:

To synthesize cobalt-cerium composite oxide hollow dodecahedrons (Co/Cex-COHDs) using MOFs as templates.
To investigate the morphology, composition, and electrocatalytic properties of the synthesized materials.
To enhance the oxygen evolution reaction (OER) performance.

Main Methods:

High-temperature pyrolysis of Co/Ce-MOFs to create Co/Cex-COHDs.
Morphological and compositional characterization of the resulting materials.
Electrochemical testing for oxygen evolution reaction (OER) activity.

Main Results:

Successfully prepared Co/Cex-COHDs with controllable hollow dodecahedron morphology.
The hollow structure provides a large surface area and abundant active sites.
Optimized Co/Ce0.2-COHDs demonstrated enhanced electrocatalytic OER activity due to improved electron transport and phase interface engineering.

Conclusions:

Co/Cex-COHDs synthesized via MOF templating show promising electrocatalytic activity for OER.
The hollow structure and optimized Co3O4/CeO2 interfaces are key factors for enhanced performance.
This approach provides a viable strategy for designing advanced electrocatalysts.