Iron-doped metal-organic framework with enhanced oxygen evolution reaction activity for overall water splitting
Iron-doped metal-organic framework with enhanced oxygen evolution reaction activity for overall water splitting
复制标题
铁掺杂金属有机骨架，具有增强整体水分解的析氧反应活性
DOI：
10.1016/j.ijhydene.2021.08.031
复制
发表时间：
2021-08
影响因子：
7.2
通讯作者：
Zeng Lin
中科院分区：
文献类型：
--
作者：
Pan Yangdan;Zhang Jianshuo;Zhao Zhiliang;Shi Le;Wu Buke;Zeng Lin
水电解是一种提供绿色清洁氢能的能量转换技术。开发高效、耐用的电催化剂是电解水的关键材料。因此，我们采用一锅水热法合成了一系列铁掺杂的金属有机骨架（MOFs）。在常规的三电极电池中，Co/Fe（1：1）-MOF催化剂在析氧反应（OER）中在10 mA cm-2的电流密度下表现出317 mV的超电势。此外，在自制的阴离子交换膜水电解槽中进一步评价了Co/Fe（1：1）-MOF催化剂的电解性能。以Co/Fe（1：1）-MOF作为OER催化剂和商业Pt/C作为析氢反应催化剂，电池在500 mA cm-2的大电流密度下呈现出490 mV的过电位，这上级于碱性介质中以商业IrO 2作为OER催化剂的基准电池。理论计算表明，Fe掺杂剂的引入显著降低了MOFs在OER过程中的中间体H2O和H2OOH结合能。因此，电催化活性增加，这是完全符合实验结果。这项工作表明，铁掺杂的MOFs结构显着提高了电催化活性，并提供了一个简单的策略，以生产氢气在大电流密度的工业水电解。
Water electrolysis is an energy conversion technology to provide green and clean hydrogen energy. Developing a high-efficient and durable electrocatalyst is a critical material for water electrolysis. Therefore, we synthesize a series of iron-doped metal-organic frameworks (MOFs) by a facile one-pot hydrothermal method. In the conventional three-electrode-cell, the Co/Fe (1:1)-MOF catalyst exhibits an overpotential of 317 mV at a current density of 10 mA cm−2in the oxygen evolution reaction (OER). Furthermore, the electrolysis performance of Co/Fe (1:1)-MOF catalyst is further evaluated in a home-made anion-exchange-membrane water electrolysis cell. With the Co/Fe (1:1)-MOF as the OER catalyst and commercial Pt/C as the hydrogen-evolution-reaction catalyst, the cell presents an overpotential of 490 mV at a large current density of 500 mA cm−2, which is superior to the benchmark cell with commercial IrO2as the OER catalyst in the alkaline media. Theoretical calculation demonstrates that the introduction of Fe dopant into MOFs significantly reduces the binding energy of ∗O and ∗OOH intermedium during the OER progress. Consequently, the electrocatalytic activity is increased, which is perfectly consistent with the experimental results. This work suggests that the iron-doped MOFs structure significantly improves the electrocatalytic activity and provides a facile strategy to produce hydrogen at a large current density for industrial water electrolysis.
登录
查看更多内容
结构设计的超支化 NiCoP 阵列具有卓越的电催化活性，可实现高效的整体水分解
影响因子：
9.5
作者：
Wang Jian-Gan;Hua Wei;Li Mingyu;Liu Huanyan;Shao Minhua;Wei Bingqing
通讯作者：
Wei Bingqing
储能应用中电催化剂的基于吸附能的活性描述符
影响因子：
20.6
作者：
Youwei Wang;Wujie Qiu;Erhong Song;Feng Gu;Zhihui Zheng;Xiaolin Zhao;Yingqin Zhao;Jianjun Liu;Wenqing Zhang
通讯作者：
Wenqing Zhang
影响因子：
4
作者：
C. Sumesh;S. Peter
通讯作者：
C. Sumesh;S. Peter
影响因子：
3.8
作者：
Yu Liu;Qishun Wang;Lanlan Wu;Y. Long;Jian Li;Shuyan Song;Hongjie Zhang
通讯作者：
Yu Liu;Qishun Wang;Lanlan Wu;Y. Long;Jian Li;Shuyan Song;Hongjie Zhang
用于增强水氧化催化的混合二维双金属有机框架
影响因子：
19
作者：
Rui, Kun;Zhao, Guoqiang;Dou, Shi Xue
通讯作者：
Dou, Shi Xue