França Mesaque C, Lima Irlan S, Ghorbani Alireza, Shahbazian-Yassar Reza, da Silva Iranaldo S, Tanaka Auro A, Angnes Lúcio, Gonçalves Josué M, de Lima-Neto Pedro
Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil.
Department of Analytical Chemistry and Physical Chemistry, Science Center, Federal University of Ceara, Fortaleza, Ceara 60440-900, Brazil.
ACS Appl Energy Mater. 2025 Aug 27;8(17):12618-12626. doi: 10.1021/acsaem.5c01604. eCollection 2025 Sep 8.
Coordination compounds based on transition metals have attracted significant attention for electrocatalyst applications due to their tunable composition and excellent properties as electrode materials. Herein, the design of ternary CoFeZn-glycerolate (CoFeZn-Gly) as an efficient electrocatalyst for oxygen evolution reaction (OER) in an alkaline medium is reported. The combination of Co, Fe, and Zn in the generated microspheres, approaching equimolar conditions, was noted to tend to generate aggregated spheres with an average size of ∼306 nm. The optimized CoFeZn-Gly OER electrocatalyst showed an overpotential of 335 mV (at a current density of 10 mA cm) and a Tafel slope of 37.2 mV dec, having the glassy carbon electrode (GCE) as a substrate. Further, the ternary electrocatalyst delivered good stability with a potential retention of 99.22% after 24 h of chronopotentiometry collected at 10 mA cm, in a 1.0 M KOH electrolyte.
基于过渡金属的配位化合物因其可调节的组成和作为电极材料的优异性能，在电催化剂应用中受到了广泛关注。在此，我们报道了三元钴铁锌甘油酸盐（CoFeZn-Gly）作为一种在碱性介质中用于析氧反应（OER）的高效电催化剂的设计。在生成的微球中，钴、铁和锌的组合接近等摩尔条件，倾向于生成平均尺寸约为306 nm的聚集球体。以玻碳电极（GCE）为基底，优化后的CoFeZn-Gly OER电催化剂在电流密度为10 mA cm时的过电位为335 mV，塔菲尔斜率为37.2 mV dec。此外，在1.0 M KOH电解液中，在10 mA cm下进行24小时计时电位法测试后，该三元电催化剂表现出良好的稳定性，电位保持率为99.22%。
