文献类型：期刊文献

英文题名：Sculpturing metal foams toward bifunctional 3D copper oxide nanowire arrays for pseudo-capacitance and enzyme-free hydrogen peroxide detection

作者：Huang, Jianfei[1];Li, Huailong[1];Zhu, Yihua[1];Cheng, Qilin[1];Yang, Xiaoling[1];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2015

卷号：3

期号：16

起止页码：8734

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20151500739720);WOS:【SCI-EXPANDED(收录号:WOS:000352489200040)】；

基金：This work was supported by the National Natural Science Foundation of China (21471056, 21236003, 21206042, and 21176083), the Basic Research Program of Shanghai (13NM1400700, 13NM1400701) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Aspect ratio - Capacitance - Metals - Copper oxides - Electrodes - Scalability - X ray diffraction - Wet etching - Nanowires

摘要：Commercial copper foams have been tailored by a highly scalable method combining room-temperature wet-chemical etching and hydroxide thermolysis into a three-dimensional copper oxide nanowire array-copper (3D-CuONA-Cu) composite with macroporous voids and large-area fur-like nanowire array structures, whose structures and compositions were studied employing electron microscopy, X-ray diffraction (XRD) and Raman spectroscopy. The 3D-CuONA-Cu composite monolith was used as a freestanding electrode for pseudo-capacitive energy storage and enzyme-free H2O2 detection. Thanks to the 3D electrode architecture and the high-density in situ formed electroactive nanoarrays, an enhanced capacitance of 608 mF cm(-2) at 2 mV s(-1) was achieved, with an 88.6% capacity retention after 4000 cycles observed at the high current density of 30 mA cm(-2). For enzyme-free H2O2 sensing, an extraordinary sensitivity of 5.75 mA mM(-1) cm(-2) and a low detection limit of 0.56 mM were achieved. This prototype sensor also exhibited eligible selectivity and feasibility for real sample analysis.