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首页> 外文期刊>International Journal of Electrochemical Science >Binary Cobalt and Magnesium Hydroxide Catalyst for Oxygen Evolution Reaction in Alkaline Water Electrolysis
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Binary Cobalt and Magnesium Hydroxide Catalyst for Oxygen Evolution Reaction in Alkaline Water Electrolysis

机译：碱性水电解中二元钴和氢氧化镁催化剂的析氧反应

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摘要

Alkaline water electrolysis has been proposed as an environmentally inoffensive way to supply theanticipated demand for hydrogen gas (H2) for the prospective hydrogen energy economy. However, inpractice, the efficiency of water electrolysis is limited by the large anodic overpotential of the oxygenevolution reaction (OER). Therefore, the development of catalysts having a low overpotential and highactivity is required in order to reduce the cost and improve the efficiency of the alkaline OER. Herein,we focused on decreasing the overpotential and increasing the catalyst activity by simultaneous use ofsynthesized carbon-supported cobalt oxide and magnesium oxide as an electrochemical catalyst for thealkaline OER. The activity of the carbon-supported cobalt and magnesium hydroxide, Co(OH)2- Mg(OH)2/C, catalyst was dependent on the pH and metal composition ratio. The highest activity andlowest overpotential were achieved with the catalyst having a Co(OH)2 to Mg(OH)2 ratio of 84:16prepared at pH 9.5.
机译：已经提出了碱性水电解作为一种无害环境的方法，以提供预期的氢气（H 2）需求，以实现预期的氢能源经济。然而，实际上，水的电解效率受到氧释放反应（OER）的大阳极过电势的限制。因此，为了降低成本并提高碱性OER的效率，需要开发具有低过电势和高活性的催化剂。本文中，我们着重于通过同时使用合成的碳负载的氧化钴和氧化镁作为碱性OER的电化学催化剂来降低过电位和提高催化剂活性。碳载钴和氢氧化镁Co（OH）2-Mg（OH）2 / C催化剂的活性取决于pH值和金属组成比。使用在pH 9.5下制备的Co（OH）2与Mg（OH）2之比为84:16的催化剂，可以获得最高的活性和最低的超电势。

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