Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/139728
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Type: | Journal article |
Title: | High-Performance Alkaline Seawater Electrolysis with Anomalous Chloride Promoted Oxygen Evolution Reaction |
Author: | Liu, H. Shen, W. Jin, H. Xu, J. Xi, P. Dong, J. Zheng, Y. Qiao, S. |
Citation: | Angewandte Chemie International Edition, 2023; 62(46):1-8 |
Publisher: | Wiley |
Issue Date: | 2023 |
ISSN: | 1433-7851 1521-3773 |
Statement of Responsibility: | Hao Liu, Wei Shen, Huanyu Jin, Jun Xu, Pinxian Xi, Juncai Dong, Yao Zheng, and Shi-Zhang Qiao |
Abstract: | A highly selective and durable oxygen evolution reaction (OER) electrocatalyst is the bottleneck for direct seawater splitting because of side reactions primarily caused by chloride ions (Cl-). Most studies about OER catalysts in seawater focus on the repulsion of the Cl- to reduce its negative effects. Herein, we demonstrate that the absorption of Cl- on the specific site of a popular OER electrocatalyst, nickel-iron layered double hydroxide (NiFe LDH), does not have a significant negative impact; rather, it is beneficial for its activity and stability enhancement in natural seawater. A set of in situ characterization techniques reveals that the adsorption of Cl- on the desired Fe site suppresses Fe leaching, and creates more OER-active Ni sites, improving the catalyst's long-term stability and activity simultaneously. Therefore, we achieve direct alkaline seawater electrolysis for the very first time on a commercial-scale alkaline electrolyser (AE, 120 cm2 electrode area) using the NiFe LDH anode. The new alkaline seawater electrolyser exhibits a reduction in electricity consumption by 20.7 % compared to the alkaline purified water-based AE using commercial Ni catalyst, achieving excellent durability for 100 h at 200 mA cm-2. |
Keywords: | alkaline water electrolyser chloride adsorption NiFe LDH Oxygen evolution reaction seawater electrolysis |
Description: | Version of record online: October 11, 2023 |
Rights: | © 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is pr |
DOI: | 10.1002/anie.202311674 |
Grant ID: | http://purl.org/au-research/grants/arc/FL170100154 http://purl.org/au-research/grants/arc/FT200100062 http://purl.org/au-research/grants/arc/DP230102027 http://purl.org/au-research/grants/arc/DP220102596 http://purl.org/au-research/grants/arc/DP190103472 |
Published version: | http://dx.doi.org/10.1002/anie.202311674 |
Appears in Collections: | Chemical Engineering publications |
Files in This Item:
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hdl_139728.pdf | Published version | 4 MB | Adobe PDF | View/Open |
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