Noble-metal-free electrocatalyst based on a mixed CoNi metal-organic framework for oxygen evolution reaction
Noble-metal-free electrocatalyst based on a mixed CoNi metal-organic framework for oxygen evolution reaction
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基于混合CoNi金属有机骨架的用于析氧反应的无贵金属电催化剂
DOI：
10.1016/j.jallcom.2019.03.399
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发表时间：
2019-07-05
影响因子：
6.2
通讯作者：
Wang, Zeng-Lin
中科院分区：
文献类型：
--
作者：
Dang, Wen-Jiao;Shen, Yu-Qian;Wang, Zeng-Lin
s A chemical oxidation process of aniline and a following deposition prepared polyaniline-nickel foam (PANI-NF) substrate. M(OAc)(2)center dot 4H(2)O (M = Co2+ and Ni2+, OAc- = acetate) reacted with 2,6-naphthalene dicarboxylic acid dipotassium (K2NDC) and in-situ deposited on the surface of PANI-NF to produce CoNi-NDC/PANI-NF composite. The reaction conditions of CoNi-NDC/PANI-NF were optimized as Co2+ and Ni2+ reacting at the starting ratio of 3: 2 at 60 degrees C for 20 h with the presence of PANI-NF. SEM images revealed that CoNi-NDC/PANI-NF sheets distributed uniformly on the surface of PANI-NF substrate. Compared to CoNi-NDC/NF, with PANI adhered, CoNi-NDC/PANI-NF sheets grew much smaller and distributed more uniformly. Also, CoNi-NDC/PANI-NF exhibited better electrocatalytic activities toward oxygen evolution reaction (OER) (with an overpotential of 323 mV at 10 mA/cm(2)), and a remarkable reaction kinetics (with a Tafel slope of 73.3 mV/dec). CoNi-NDC/PANI-NF shows horizon I-t curves for 20 h at 10 and 100mA/cm(2), indicating a high durability without degradation of the OER performance. Compared to most recently reported MOF-based composites, lower or comparable overpotential and Tafel slope of CoNiNDC/PANI-NF indicate it is a potential noble-metal-free electrocatalyst for OER. (c) 2019 Elsevier B.V. All rights reserved.
