Quasi-ZIF-67 for Boosted Oxygen Evolution Reaction Catalytic Activity via a Low Temperature Calcination
Quasi-ZIF-67 for Boosted Oxygen Evolution Reaction Catalytic Activity via a Low Temperature Calcination
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Quasi-ZIF-67 通过低温煅烧增强析氧反应催化活性
DOI：
10.1021/acsami.0c05450
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发表时间：
2020
影响因子：
9.5
通讯作者：
Braunstein Pierre
中科院分区：
文献类型：
--
作者：
Zhu Rongmei;Ding Jiawei;Yang Jinpeng;Pang Huan;Xu Qiang;Zhang Daliang;Braunstein Pierre
在保持孔隙度的金属有机骨架中暴露具有催化活性的金属位点可以加速电子转移，从而提高电化学能量存储和转换的性能。本文报道了通过电催化析氧反应（OER）对ZIF-67进行低温煅烧得到的一系列准ZIF-67，并通过球面像差校正透射电镜对其纳米结构进行了分析。准zif -67-350不仅具有2038.2 m的brunauer - emmet - teller表面积(2)。g(-1)，但也表现出极低的电荷转移电阻15.0 ω。在催化OER过程中，准zif -67-350在1.0 M KOH的电解液中在10 mA cm（-2）下表现出286 mV的低过电位。所获得的准zif -67在OER中表现出较高的催化活性，其可控煅烧策略无疑为低成本高效电催化剂的合成开辟了道路。
Exposing catalytically active metal sites in metal-organic frameworks with maintained porosity could accelerate electron transfer, leading to improved performances in electrochemical energy storage and conversion. Here, we report a series of quasi-ZIF-67 obtained from low temperature calcination of ZIF-67 for electrocatalytic oxygen evolution reaction (OER) and reveal the nanostructural structure via the spherical aberration-corrected transmission electron microscopy. The quasi-ZIF-67-350 not only possesses a large Brunauer-Emmett-Teller surface area of 2038.2 m(2).g(-1) but also presents an extremely low charge- transfer resistance of 15.0 Omega. In catalyzing the OER process, quasi-ZIF-67-350 displays a low overpotential of 286 mV at 10 mA cm(-2) in the electrolyte of 1.0 M KOH. The acquired quasi-ZIF-67 demonstrates a high catalytic activity in OER, and the controlled calcination strategy undoubtedly paves a way in synthesizing low-cost and efficient electrocatalysts.