Cobalt-regulated NiFe-LDH for efficient electrocatalytic oxygen evolution in alkaline simulated industrial sewage and natural seawater

IF 4.5 3区化学 Q1 Chemical Engineering Journal of Electroanalytical Chemistry Pub Date : 2023-10-04 DOI:10.1016/j.jelechem.2023.117824

Long Teng , Lifang Zhao

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Abstract

The electrolysis of alkaline industrial sewage and seawater to produce hydrogen can alleviate the freshwater problem while also achieving clean energy production. Herein, we developed a three-dimensional spherical NiCoFe-LDH electrocatalyst for electrocatalytic oxygen evolution reaction (OER) by ions exchange and co-precipitate. The electronic interaction between the polymetallic ions optimizes the adsorption and desorption of the oxygen-containing intermediates. Compared to NiFe-LDH, the introduction of Co promoted the adsorption of OH* and the deprotonation of OOH* adsorbate intermediates. The prepared electrocatalyst shows good OER activity with a overpotential of 274 mV at 10 mA/cm². Furthermore, the prepared electrocatalysts exhibit good resistance to chloride ion corrosion, and the industrial-grade geometric current density of 500 mA/cm² could be achieved at a potential of approximately 1.68 V (vs. RHE) in strongly alkaline (6 M KOH) industrial sewage and seawater.

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钴调节的NiFe-LDH在碱性模拟工业污水和天然海水中高效电催化析氧

电解碱性工业污水和海水生产氢气可以缓解淡水问题，同时也可以实现清洁能源生产。在此，我们开发了一种三维球形NiCoFe-LDH电催化剂，用于通过离子交换和共沉淀进行电催化析氧反应（OER）。多金属离子之间的电子相互作用优化了含氧中间体的吸附和解吸。与NiFe-LDH相比，Co的引入促进了OH*的吸附和OOH*吸附质中间体的去质子化。所制备的电催化剂显示出良好的OER活性，在10mA/cm2下具有274mV的过电位。此外，所制备的电催化剂表现出良好的抗氯离子腐蚀性，并且在强碱性（6M KOH）工业污水和海水中，在约1.68V（vs.RHE）的电势下可以实现500mA/cm2的工业级几何电流密度。

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来源期刊

Journal of Electroanalytical Chemistry Chemical Engineering-General Chemical Engineering

CiteScore

7.50

自引率

6.70%

发文量

912

审稿时长

>12 weeks

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.