Facile Synthesis of a Ternary Metal Hydroxide with Acid Treatment as an Effective and Durable Electrocatalyst in Water Oxidation.,ChemPlusChem

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Facile Synthesis of a Ternary Metal Hydroxide with Acid Treatment as an Effective and Durable Electrocatalyst in Water Oxidation.
ChemPlusChem ( IF 3.0 ) Pub Date : 2018-04-30 , DOI: 10.1002/cplu.201800053
Xiujuan Wu ₁ , Tongyu Xing ₁ , Yimeng Zhao ₁ , Husileng Lee ₁ , Peili Zhang ₁

Affiliation

Developing low-cost, effective, and durable oxygen-evolution catalysts (OECs) is still a huge challenge owing to the uphill thermodynamic reaction and the involvement of a four-electron and four-proton kinetics process. Herein, a facilely prepared NiCoFe(OH)x /NiOOH/NF electrode affords current densities of 10 and 100 mA cm-2 at overpotentials of 223 and 254 mV, respectively, and a Tafel slope as low as 33.5 mV dec-1 in 1 m KOH, which is superior to NiCoFe(OH)x /NF electrodes electrodeposited with a traditional method. This electrode also displays surprisingly high durability at a current density of 50 mA cm-2 for over 50 hours under alkaline conditions. Component analysis and an electrochemical study revealed that the catalytic activity enhancement of this newly prepared electrode is mainly attributed to the formation of the electrically conductive NiOOH interlayer.

中文翻译：

通过酸处理轻松合成三元金属氢氧化物，将其作为水氧化中有效且耐用的电催化剂。

由于上坡的热力学反应以及四电子和四质子动力学过程的参与，开发低成本，有效和耐用的氧析出催化剂（OEC）仍然是一项巨大的挑战。本文中，一种容易制备的NiCoFe（OH）x / NiOOH / NF电极在过电势分别为223和254 mV时提供10和100 mA cm-2的电流密度，并且Tafel斜率在1中低至33.5 mV dec-1 m KOH，优于传统方法电沉积的NiCoFe（OH）x / NF电极。在碱性条件下，该电极在50 mA cm-2的电流密度下，在超过50小时的时间内也显示出惊人的高耐久性。

更新日期：2018-04-30

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