Issue 39, 2021

Efficient hydrogen production by saline water electrolysis at high current densities without the interfering chlorine evolution

Abstract

Seawater electrolysis powered by renewable energy sources has been proposed to be a potentially cost-effective approach to green hydrogen production. However, the long-standing issue regarding the chlorine evolution reaction (CER) that deteriorates the performance of electrocatalysts and other components of electrolyzers has been impeding the market adoption of direct seawater electrolyzers. Herein, we demonstrate that coupling the cathodic hydrogen evolution reaction (HER) with the hydrazine oxidation reaction (HzOR) taking place at the anode enables the alkaline–saline water electrolysis to occur at a high current density without the unfavorable, interfering CER. Using bifunctional carbon paper supported Co–Ni–P nanowires (Co–Ni–P/CP) as the cathode and anode, we have accomplished hydrogen production in the alkaline–saline–hydrazine electrolyte at 500 mA cm−2 with a small cell voltage of only 0.533 V and outstanding stability of 80 hours with minimal degradation.

Graphical abstract: Efficient hydrogen production by saline water electrolysis at high current densities without the interfering chlorine evolution

Supplementary files

Article information

Article type
Communication
Submitted
06 יול 2021
Accepted
12 ספט 2021
First published
13 ספט 2021

J. Mater. Chem. A, 2021,9, 22248-22253

Efficient hydrogen production by saline water electrolysis at high current densities without the interfering chlorine evolution

Z. Yu, J. Xu, L. Meng and L. Liu, J. Mater. Chem. A, 2021, 9, 22248 DOI: 10.1039/D1TA05703K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements