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Atomic cobalt catalysts for the oxygen evolution reaction.
Chemical Communications ( IF 4.3 ) Pub Date : 2019-12-18 , DOI: 10.1039/c9cc09007j
Qiaoqiao Zhang 1 , Zhiyao Duan 2 , Min Li 1 , Jingqi Guan 1
Affiliation  

Development of high-efficiency single-atom catalysts (SACs) for the oxygen evolution reaction (OER) is challenging. Herein, we report a facile annealing strategy to construct an atomically dispersed cobalt- and nitrogen-codoped graphene catalyst for high-efficiency OER. The as-prepared 0.7-Co@NG-750 electrocatalyst requires an ultra-low onset overpotential of approximately 210 mV on a glassy carbon electrode in both 1.0 M KOH and 0.1 M KOH solutions. The density functional theory (DFT) calculations reveal that the theoretical overpotential on Co-N4 and Co-N2C2 sites is 0.41 and 0.53 V, respectively, and these might be efficient active sites for electrocatalytic water oxidation.

中文翻译:

用于氧释放反应的原子钴催化剂。

开发用于氧气逸出反应(OER)的高效单原子催化剂(SAC)具有挑战性。在这里,我们报告了一种简便的退火策略,以构建原子分散的钴和氮共掺杂的石墨烯催化剂,以实现高效的OER。所制备的0.7-Co@NG-750电催化剂在1.0 M KOH和0.1 M KOH溶液中在玻璃碳电极上需要约210 mV的超低起始过电势。密度泛函理论(DFT)计算表明,Co-N4和Co-N2C2位上的理论超电势分别为0.41和0.53 V,这可能是电催化水氧化的有效活性位。
更新日期:2019-12-19
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