A solar responsive cubic nanosized CuS/Cu2O/Cu photocathode with enhanced photoelectrochemical activity
A solar responsive cubic nanosized CuS/Cu2O/Cu photocathode with enhanced photoelectrochemical activity
复制标题
具有增强光电化学活性的太阳能响应立方纳米尺寸 CuS/Cu2O/Cu 光电阴极
DOI：
10.1016/j.jcat.2019.02.031
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发表时间：
2019-04-01
影响因子：
7.3
通讯作者：
Li, Jinwang
中科院分区：
文献类型：
--
作者：
Chen, Xin;Chen, Rong;Li, Jinwang
本工作采用CuS/Cu 2 O/Cu立方纳米粒子制备太阳能响应光电阴极，以促进电子/空穴对的分离，从而提高光电化学活性。EIS和LSV结果表明，所制备的CuS/Cu 2 O/Cu光电阴极对氧还原反应的光电化学活性优于Cu 2 O/Cu光电阴极。光电流随时间的变化证实了所研制的CuS/Cu 2 O/Cu光电阴极具有良好的稳定性。此外，开发的CuS/Cu 2 O/Cu光电阴极也进行了评估，将其纳入光催化燃料电池的横向设计，同时废水处理和发电。结果表明，与Cu 2 O/Cu光电阴极相比，电池性能得到了提高。然后，在各种操作条件下的光催化燃料电池与开发的光电阴极的性能进行了研究。实验结果表明，在测试范围内，增加光照强度、提高Na 2SO 4电解液浓度、降低液体流量均能改善电池性能。该研究为光催化燃料电池及其它光电化学系统提供了一种新的光电阴极设计。(C)2019爱思唯尔公司All rights reserved.
In this work, a solar responsive photocathode with the CuS/Cu2O/Cu cubic nanoparticles was developed to facilitate the separation of the electron/hole pairs so as to enhance the photoelectrochemical activity. The EIS and LSV results indicated the developed CuS/Cu2O/Cu photocathode showed better photoelectrochemical activity toward the oxygen reduction reaction than the Cu2O/Cu photocathode. Good stability of the developed CuS/Cu2O/Cu photocathode was confirmed by the photocurrent vs time measurement. Besides, the developed CuS/Cu2O/Cu photocathode was also assessed by incorporating it into a photocatalytic fuel cell with the lateral design for simultaneous wastewater treatment and electricity generation. It was shown that higher cell performance was achieved than the Cu2O/Cu photocathode. The performance of the photocatalytic fuel cell with the developed photocathode was then studied under various operating conditions. Experimental results indicated that increasing the light intensity and the Na2SO4 electrolyte concentration and decreasing the liquid flow rate in the testing range could improve the cell performance. This study provides a new photocathode design for the photocatalytic fuel cell applications and other photoelectrochemical systems. (C) 2019 Elsevier Inc. All rights reserved.