近日，浙江工业大学张旺团队研究了阴离子交换膜电解用金属-有机骨架富配体析氧电催化剂。2025年4月21日，《科学通报》杂志发表了这一成果。

金属有机骨架（MOFs）中的有机配体在碱性析氧反应（OER）的重建和催化过程中起着不可或缺的作用。然而，在MOF重构的OER电催化剂中保持高含量的配体以及研究配体与衍生的（氧）氢氧化物之间的相互作用仍然是一个很大的挑战。研究组通过两步机械化学和电化学重建策略制备了富含配体的三金属非晶电催化剂。

实验和理论研究清楚地表明，配体苯环上的离域π电子与衍生的（氧）氢氧化物之间的d-π相互作用可以触发配体向活性金属中心的电荷转移，从而优化含氧中间体的吸附能，提高OER性能。此外，使用这种富含配体的OER电催化剂的阴离子交换膜水电解槽可以在1.69 V和55°C下在500 mA cm^-2的工业级电流密度下稳定运行200多小时。这项工作为有机配体在碱性OER电催化中的作用提供了新的见解，有可能促进在工业级电流强度下生产绿色氢气。

附：英文原文

Title: Ligand-rich oxygen evolution electrocatalysts reconstructed from metal-organic frameworks for anion-exchange membrane water electrolysis

Author: Tianyang Liu c, Rui Li a, Zhen-Yu Wu b, Wang Zhang a

Issue&Volume: 2025/04/21

Abstract: Organic ligands in metal-organic frameworks (MOFs) play an indispensable role in the reconstruction and catalysis during the alkaline oxygen evolution reaction (OER). However, it is still a big challenge to maintain a high content of ligands in MOF-reconstructed OER electrocatalysts and to study the interaction between ligands and derived (oxy)hydroxides. Herein, a ligand-rich trimetallic amorphous electrocatalyst is fabricated through a two-step mechanochemical and electrochemical reconstruction strategy. Experimental and theoretical studies clearly reveal that the d-π interaction between delocalized π-electrons on the benzene ring of ligands and derived (oxy)hydroxides, can trigger the charge transfer from ligands to the active metal centers, thus optimizing the adsorption energy of the oxygen-containing intermediates and enhancing the OER performance. Moreover, an anion-exchange membrane water electrolyzer using such ligand-rich OER electrocatalyst can be operated steadily at 1.69 V and 55 °C under an industrial-level current density of 500 mA cm2 for over 200 h. This work provides novel insights into the role of organic ligands in alkaline OER electrocatalysis, with the potential to facilitate the production of green hydrogen at industrial-level current densities.

DOI: 10.1016/j.scib.2025.04.037

Source: https://www.sciencedirect.com/science/article/pii/S2095927325003950