Modulating Electronic Structure of Metal-Organic Framework for Efficient Electrocatalytic Oxygen Evolution
Modulating Electronic Structure of Metal-Organic Framework for Efficient Electrocatalytic Oxygen Evolution
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调节金属有机骨架的电子结构以实现高效电催化析氧
DOI：
10.1002/aenm.201801564
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发表时间：
2018
影响因子：
27.8
通讯作者：
Su C.-Y.
中科院分区：
文献类型：
--
作者：
Xue Z.;Li Y.;Zhang Y.;Geng W.;Jia B.;Tang J.;Bao S.;Wang H.-P.;Fan Y.;Wei Z.-W.;Zhang Z.;Ke Z.;Li G.;Su C.-Y.
探索高效的析氧反应电催化剂是燃料电池、水分解和金属-空气电池等能量存储和转换系统的重要要求。在这里，通过金属、对苯二甲酸(A)和2-氨基对苯二甲酸配体(B)的组装，制备了一种多相金属-有机骨架(MOF)，定义为A2.7B-MOF-FeCo1.6。更重要的是，A2.7B-MOF-FeCo1.6表现出优异的过流活性，在10 mA cm−时的超低过电位为288 mV，Tafel斜率为39 mV dec−1。OER的高电催化性能归功于通过设计金属节点和连接体来优化MOF中本征催化中心的电子结构。这项工作不仅为纯MOF在电催化中的应用提供了一个基准，而且为通过MOF中催化活性中心的电子结构工程来提高电催化性能提供了一种新的有效策略。
Exploring effective electrocatalysts for oxygen evolution reaction (OER) is a crucial requirement of many energy storage and conversion systems, involving fuel cells, water splitting, and metal–air batteries. Herein, a heterogeneity metal‐organic framework (MOF) is prepared by the assembling of metals, terephthalic (A) and 2‐aminoterephthalic ligands (B), defined as A2.7B‐MOF‐FeCo1.6. More importantly, A2.7B‐MOF‐FeCo1.6exhibits excellent OER activity with an ultralow overpotential of 288 mV at 10 mA cm−2and a Tafel slope of 39 mV dec−1. The high electrocatalytic performance for OER is attributed to the optimized electronic structure of the intrinsic catalytic center in MOFs via the engineering of the metal node and linkers. The work offers not only a benchmark for pure MOFs in electrocatalysis but also a new efficient strategy to improve electrocatalytic performance by electronic structure engineering of catalytic active centers in MOFs.