A copper based metal-organic framework as single source for the synthesis of electrode materials for high-performance supercapacitors and glucose sensing applications
A copper based metal-organic framework as single source for the synthesis of electrode materials for high-performance supercapacitors and glucose sensing applications
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DOI：
10.1016/j.ijhydene.2014.09.106
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发表时间：
2014-11-20
影响因子：
7.2
通讯作者：
Nadeem, Muhammad Arif
中科院分区：
文献类型：
--
作者：
Khan, Inayat Ali;Badshah, Amin;Nadeem, Muhammad Arif
本文研究了MOF-199在惰性气氛中于700℃和800℃简单热解生成CuCu2O-CuO/C700(1)和CuCu2O-CuO/C800(2)纳米结构。X-射线光电子能谱分析表明，CuCu2O-CuO/C纳米结构是由表面带有铜/铜氧化物颗粒的带有羧基、羰基和羟基官能团的石墨炭组成。用循环伏安法、恒电流充放电和交流阻抗谱等方法对1和2作为超级电容器电极材料的电化学性质进行了评价。循环伏安和恒流充放电的电容性能测试结果表明，在扫描速度为2 mV S(-1)、电流密度为2 mA cm(-2)时，两种样品的重电容均大于750Fg(-1)。在75 mV的高扫描速度下，样品仍保持了约43%的初始电容。循环性能表明，在3000次循环后，仍有5.5%的电容损失。样品1和样品2用1moL L-1HCl溶液洗涤，得到了无铜氧化物材料Cu/C700(3)和Cu/C800(4)。样品3和4被测试为葡萄糖传感的电催化剂，循环伏安测量表明，与文献值相比，电流密度增加。版权所有(C)2014，氢能源出版有限责任公司。爱思唯尔有限公司出版。保留所有权利。
The article describes the conversion of MOF-199 to Cu-Cu2O-CuO/C 700 (1) and Cu-Cu2O-CuO/C 800 (2) nanostructures by simple pyrolysis at 700 and 800 degrees C under inert atmosphere. The X-ray photoelectron spectroscopy analysis reveals that the nanostructures Cu-Cu2O-CuO/C consist of graphitic carbon functionalized with carboxylic, carbonyl and hydroxyl functional groups with copper/copper oxide particles on surfaces. The electro-chemical properties of 1 and 2 are evaluated as electrode material for supercapacitors using cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy. The results for the capacitive performance from cyclic voltammetry and galvanostatic charge/discharge reveal that both the samples have gravimetric capacitance greater than 750 F g(-1) at a scan rate of 2 mV s(-1) and current density of 2 mA cm(-2). The samples retain about 43% of their initial capacitance even at high scan rate of 75 mV The cycling performance of the nanostructures illustrate that there is 5.5% capacitance loss after 3000 cycles. The sample 1 and 2 are washed with 1 mol L-1 HCl solution to obtain copper oxide free materials Cu/C 700 (3) and Cu/C 800 (4). Samples 3 and 4 are tested as electrocatalysts for glucose sensing and the cyclic voltammetry measurement shows enhanced current densities compared to the literature values. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.