Universal synthesis of coral-like ternary MOF-derived sulfides as efficient OER electrocatalysts,Inorganic Chemistry Frontiers

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Universal synthesis of coral-like ternary MOF-derived sulfides as efficient OER electrocatalysts
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2024-07-26 , DOI: 10.1039/d4qi01725k
Tianpeng Liu ₁ , Yangping Zhang ₁ , Jun Yu ₁ , Mengyun Hu ₁ , Zhengying Wu ₂ , Xiao Wei ₁ , Shudi Yu ₁ , Yukou Du ₁

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The strategy of synthesizing high-efficiency oxygen evolution reaction (OER) catalysts using sacrificing metal–organic framework (MOF) templates is considered promising. However, few reports have focused on improving the intrinsic electrocatalytic activity of the MOF templates. Herein, we have developed a universal synthesis method for synthesizing a series of ternary coral-like FeNiM (M = Zn, Co and Cd) MOF templates. Benefitting from the synergistic effect, these trimetallic templates exhibit identical morphologies and outstanding OER performance compared to mono-metal templates. Moreover, transition metal sulfides (FeNiZnS) have been synthesized to enhance the overall electrical conductivity of catalyst materials. Optimized FeNiZnS-1 exhibits a minimal overpotential of 249 mV to achieve a current density of 10 mA cm⁻², alongside outstanding electrochemical durability over 60 h in chronopotentiometry (CP) testing. The two-electrode couple FeNiZnS-1//Pt/C achieves a cell voltage of 1.54 V at 10 mA cm⁻² for overall water splitting in 1 M KOH solution.

中文翻译：

珊瑚状三元 MOF 衍生硫化物的通用合成作为高效 OER 电催化剂

使用牺牲金属有机骨架（MOF）模板合成高效析氧反应（OER）催化剂的策略被认为是有前途的。然而，很少有报道关注提高 MOF 模板的固有电催化活性。在此，我们开发了一种通用合成方法，用于合成一系列三元珊瑚状 FeNiM（M = Zn、Co 和 Cd）MOF 模板。受益于协同效应，这些三金属模板与单金属模板相比表现出相同的形貌和出色的 OER 性能。此外，还合成了过渡金属硫化物（FeNiZnS）来增强催化剂材料的整体电导率。优化的 FeNiZnS-1 表现出 249 mV 的最小过电势，可实现 10 mA cm ^-2的电流密度，同时在计时电位 (CP) 测试中具有超过 60 小时的出色电化学耐久性。双电极对 FeNiZnS-1//Pt/C 在 10 mA cm ^-2下实现了 1.54 V 的电池电压，用于 1 M KOH 溶液中的整体水分解。

更新日期：2024-07-26

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