What is it about?
We have experimentally established a facile calcination and electrochemical activation (EA) methodology to dramatically increase the concentration of OVs and provide theoretical insight into how the concentration of (OVs) affects the performance of spinel transition metal oxides (TMOs) towards the electrochemical hydrogen evolution reaction (HER)
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Why is it important?
The development of facile strategies to tune the oxygen vacancy (OV) content in transition metal oxides (TMOs) is paramount to obtain low-cost and stable electrocatalysts; our preliminary modeling results definitely demonstrate that the increasing concentration of OVs in spinel TMOs reduce the adsorption energy of water molecules and their dissociation energy barrier on the surface of the catalyst, thus improving the HER activity of TMOs.
Perspectives
This work may open a new avenue to increase the concentration of oxygen vacancies in transition metal oxides (TMOs) in a controlled manner for promising applications in a variety of fields.
Bin Zhang
Tianjin University
Read the Original
This page is a summary of: Hydrogen evolution activity enhancement by tuning the oxygen vacancies in self-supported mesoporous spinel oxide nanowire arrays, Nano Research, August 2017, Tsinghua University Press,
DOI: 10.1007/s12274-017-1670-8.
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