A metal organic-framework/carbon composite with enhanced bifunctional electrocatalytic activities towards oxygen reduction/evolution reactions
A metal organic-framework/carbon composite with enhanced bifunctional electrocatalytic activities towards oxygen reduction/evolution reactions
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DOI：
10.1016/j.ijhydene.2017.02.063
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发表时间：
2017-07-06
影响因子：
7.2
通讯作者：
Li, Guoru
中科院分区：
文献类型：
--
作者：
Fan, Tianyu;Yin, Fengxiang;Li, Guoru
采用水热法将MOF（Co-OBA）与黑碳复合，制备了Co-OBA/C（OBA = 4，4 '-氧代双苯甲酸）复合催化剂。采用X射线粉末衍射、傅里叶变换红外光谱、扫描电子显微镜和X射线光电子能谱对催化剂进行了表征。采用线性扫描伏安法（LSV）评价了催化剂在碱性电解液中对氧还原反应（ORR）和析氧反应（OER）的催化活性。在Co-OBA/C催化剂中，羧酸根以螯合配位方式与咪唑键合，咪唑以单齿配位方式与羧酸根键合。由于Co-OBA/C催化剂中Co-OBA和炭黑之间的协同作用，Co-OBA/C催化剂比Co-OBA + C催化剂具有更好的ORR、OER和双功能活性。(C)2017年氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
A Co-OBA/C (OBA = 4,4'-Oxybis (benzoic acid)) composite catalyst was synthesized by integrating MOF (Co-OBA) with black carbon through a hydrothermal process. The catalyst was characterized using X-ray powder diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. The catalytic activities toward the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) were evaluated by linear-sweep voltammetry (LSV) in an alkaline electrolyte. The ligand mode of the carboxylate binding is chelating coordination and the ligand mode of imidazole is monodentate ligand in the Co-OBA/C catalyst. The Co-OBA/C catalyst shows much better ORR, OER and bifunctional activities than the Co-OBA + C catalyst due to the synergistic effect between Co-OBA and carbon black in the Co-OBA/C catalyst. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.