Cobalt/Carbon Nanocomposite as Oxygen Evolution Reaction Electrocatalyst,ChemElectroChem

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Cobalt/Carbon Nanocomposite as Oxygen Evolution Reaction Electrocatalyst
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-07-13 , DOI: 10.1002/celc.201800355
Marcin Biegun ₁ , Xuecheng Chen ₁ , Ewa Mijowska ₁

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Electrocatalysts based on cobalt are promising catalytic materials for water electrolysis. In this work, We reported a catalyst composed of cobalt nanoparticles embeded in a carbon lattice through synthesis with a cationic polymer (PEI) and carbonization process at three temperatures (800, 900 and 1000 °C). The material obtained at 1000 °C showed the highest activity towards the oxygen evolution reaction (OER) in an alkaline medium (1 M KOH). Moreover, the OER overpotential required to reach 10 mA cm⁻² of 296 mV, was lower than for the commercial RuO₂ catalyst. Further, the material also exhibited very good stability in a long‐term stability test at 10 mA cm⁻².

中文翻译：

钴/碳纳米复合材料作为析氧反应电催化剂

基于钴的电催化剂是用于水电解的有前途的催化材料。在这项工作中，我们报告了一种催化剂，该催化剂由嵌入到碳晶格中的钴纳米颗粒组成，该钴纳米颗粒通过与阳离子聚合物（PEI）的合成以及在三个温度（800、900和1000°C）下的碳化过程而形成。在碱性介质（1 M KOH）中，在1000°C下获得的材料对氧释放反应（OER）的活性最高。此外，达到10 m cm ^-2的296 mV所需的OER过电势低于商用RuO ₂催化剂。此外，该材料还在10 mA cm ^-2的长期稳定性测试中也显示出非常好的稳定性。

更新日期：2018-07-13

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