Highly Active Three-Dimensional NiFe/Cu2O Nanowires/Cu Foam Electrode for Water Oxidation
Highly Active Three-Dimensional NiFe/Cu2O Nanowires/Cu Foam Electrode for Water Oxidation
复制标题
用于水氧化的高活性三维 NiFe/Cu2O 纳米线/泡沫铜电极
DOI：
10.1002/cssc.201601884
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发表时间：
2017-04-10
期刊：
影响因子：
8.4
通讯作者：
Sun, Licheng
中科院分区：
文献类型：
--
作者：
Chen, Hu;Gao, Yan;Sun, Licheng
水分解对于开发可再生能源转换和储存系统至关重要，但动力学缓慢的析氧反应（OER）极大地阻碍了水分解。本工作开发了一种三维、高效、耐用的NiFe/Cu 2 O纳米线/泡沫铜阳极（NiFe/Cu 2 O NWs/CF），用于1.0mKOH中的水氧化。该电极的电流密度为10 mAcm（-2），过电位为215 mV。基于电催化活性表面积，估计平均比电流密度（j（s））为0.163mAcm（-2）at = 310 mV。电极还显示出42 mVdecade（-1）的低塔菲尔斜率。此外，NiFe/Cu 2 O NWs/CF电极在= 260 mV的过电位下可以保持100 mAcm（-2）的稳定电流密度50 h。OER电极的优异电化学性能归因于泡沫铜的高导电性和电极具有大界面面积的特定结构。
Water splitting is of paramount importance for exploiting renewable energy-conversion and -storage systems, but is greatly hindered by the kinetically sluggish oxygen evolution reaction (OER). In this work, a three-dimensional, highly efficient, and durable NiFe/Cu2O nanowires/Cu foam anode (NiFe/Cu2O NWs/CF) for water oxidation in 1.0m KOH was developed. The obtained electrode exhibited a current density of 10mAcm(-2) at a uniquely low overpotential of =215mV. The average specific current density (j(s)) was estimated, on the basis of the electrocatalytically active surface area, to be 0.163mAcm(-2) at =310mV. The electrode also displayed a low Tafel slope of 42mVdecade(-1). Moreover, the NiFe/Cu2O NWs/CF electrode could maintain a steady current density of 100mAcm(-2) for 50h at an overpotential of =260mV. The outstanding electrochemical performance of the electrode for the OER was attributed to the high conductivity of the Cu foam and the specific structure of the electrode with a large interfacial area.