Facile surface treatment on Cu2O photocathodes for enhancing the photoelectrochemical response
Facile surface treatment on Cu2O photocathodes for enhancing the photoelectrochemical response
复制标题
Cu2O 光电阴极的简便表面处理可增强光电化学响应
DOI：
10.1016/j.apcatb.2016.06.010
复制
发表时间：
2016-12-05
影响因子：
22.1
通讯作者：
Lei, Yong
中科院分区：
文献类型：
--
作者：
Cao, Dawei;Nasori, Nasori;Lei, Yong
P型Cu_2O由于其合适的带隙结构和低成本的制备方法，一直被认为是光电化学中的一种有利材料。然而，这种有前途的材料在水性电解质中遭受腐蚀。为了解决这一问题并获得高光电化学性能，必须采用保护性氧化物层和昂贵的催化剂。然而，这种附加程序的复杂性限制了进一步的应用。而不是利用表面保护氧化层和昂贵的催化剂，在这里，我们报告说，表面处理的Cu 2 O光电阴极使用柠檬酸三钠（TSC）也可以大大提高光电化学性能。与未添加TSC的电极相比，FTO/Au/Cu 2 O/TSC/TiO 2/Pt光电阴极的光电流明显增加，约为原来的2倍。因此，本文提供了一种新的，但方便的方法来优化太阳能转换系统的性能，采用p型氧化铜的表面修饰功能分子。(C)© 2016 Elsevier B. V.版权所有。
P-type Cu2O has long been regarded as an advantageous material in photoelectrochemistry, owing to the suitable band gap structure and cost-effective production. However, such promising material is suffering from corrosion in aqueous electrolytes. To address this issue and attain a high photoelectrochemical performance, protective oxide layers and expensive catalysts have to be adopted. The complicacy of such additional procedures, however, limits the further applications. Instead of utilizing surface protecting oxide layers and expensive catalysts, herein, we report that the surface treatment of Cu2O photocathodes using trisodium citrate (TSC) could also greatly enhance the photoelectrochemical performance. In comparison with the electrode without TSC, the photocathode of FTO/Au/Cu2O/TSC/TiO2/Pt presents a pronounced increment in photocurrent with a factor of about 2. Therefore, this paper provides a novel but convenient methodology to optimize the performance of solar energy conversion systems employing p-type Cu2O by modifying the surface with functional molecules. (C) 2016 Elsevier B.V. All rights reserved.