Low-Crystalline Bimetallic Metal-Organic Framework Electrocatalysts with Rich Active Sites for Oxygen Evolution
Low-Crystalline Bimetallic Metal-Organic Framework Electrocatalysts with Rich Active Sites for Oxygen Evolution
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DOI：
10.1021/acsenergylett.8b02345
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发表时间：
2019-01-01
影响因子：
22
通讯作者：
Mai, Liqiang
中科院分区：
文献类型：
--
作者：
Li, Jiantao;Huang, Wenzhong;Mai, Liqiang
开发高效、稳定、低成本的析氧反应（OER）催化剂在水裂解和金属-空气电池中具有重要意义。过渡金属-有机骨架（MOFs）由于其可调的晶体结构而成为一种有前途的催化剂，并得到了广泛的研究。与传统的调控高结晶性MOFs形貌的策略不同，低结晶性MOFs是通过引入外来金属离子来构建的，并通过实验和理论方法揭示了其形成过程。由于局部结晶和长程无序，低结晶度的MOFs表现出丰富的活性位，作为析氧电催化剂，在10 mA cm（-2）时的过电位为260 mV，Tafel斜率为35 mV dec（-1），法拉第效率为99.5%。这项工作开辟了一个新的途径，为开发高效的地球丰富的催化剂在前沿的潜在应用。
Developing efficient, stable, and low-cost catalysts for oxygen evolution reaction (OER) is highly desired in water splitting and metal-air batteries. Transition metal-organic frameworks (MOFs) have emerged as promising catalysts and have been intensively investigated especially due to their tunable crystalline structure. Unlike traditional strategies of tuning the morphology of well-crystalline MOFs, low-crystalline bimetallic MOFs are constructed via inducing exotic metal ions, and the formation process is revealed by experimental and theoretical methods. The low crystalline bimetallic MOFs exhibit rich active sites due to local crystallinity and long-range disorder and deliver a small overpotential of 260 mV at 10 mA cm(-2), a low Tafel slope of 35 mV dec(-1), and a high Faradaic efficiency of 99.5% as oxygen evolution elecctrocatalysts. The work opens up a new avenue for the development of highly efficient earth-abundant catalysts in frontier potential applications.