Stable and Efficient CuO Based Photocathode through Oxygen-Rich Composition and Au–Pd Nanostructure Incorporation for Solar-Hydrogen Production,ACS Applied Materials & Interfaces

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Stable and Efficient CuO Based Photocathode through Oxygen-Rich Composition and Au–Pd Nanostructure Incorporation for Solar-Hydrogen Production
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-08-08 00:00:00 , DOI: 10.1021/acsami.7b02685
Saeid Masudy-Panah _{1,

2,

3} , Roozbeh Siavash Moakhar _{1,

4} , Chin Sheng Chua ₁ , Ajay Kushwaha _{1,

5} , Goutam Kumar Dalapati ₁

Affiliation

Enhancing stability against photocorrosion and improving photocurrent response are the main challenges toward the development of cupric oxide (CuO) based photocathodes for solar-driven hydrogen production. In this paper, stable and efficient CuO-photocathodes have been developed using in situ materials engineering and through gold–palladium (Au–Pd) nanoparticles deposition on the CuO surface. The CuO photocathode exhibits a photocurrent generation of ∼3 mA/cm² at 0 V v/s RHE. Time-of-flight secondary ion mass spectrometry (TOF-SIMS) analysis and X-ray spectroscopy (XPS) confirm the formation of oxygen-rich (O-rich) CuO film which demonstrates a highly stable photocathode with retained photocurrent of ∼90% for 20 min. The influence of chemical composition on the photocathode performance and stability has been discussed in detail. In addition, O-rich CuO photocathodes deposited with Au–Pd nanostructures have shown enhanced photoelectrochemical performance. Linear scan voltammetry characteristic shows ∼25% enhancement in photocurrent after Au–Pd deposition and reaches ∼4 mA/cm² at “0” V v/s RHE. Hydrogen evolution rate significantly depends on the elemental composition of CuO and metal nanostructure. The present work has demonstrated a stable photocathode with high photocurrent for visible-light-driven water splitting and hydrogen production.

中文翻译：

通过富氧组合和Au-Pd纳米结构掺入稳定而有效的基于CuO的光电阴极来生产太阳能氢

增强抗光腐蚀的稳定性和改善光电流响应是开发用于太阳能驱动制氢的基于氧化铜（CuO）的光阴极的主要挑战。在本文中，使用原位材料工程技术以及通过金-钯（Au-Pd）纳米粒子在CuO表面的沉积，开发了稳定高效的CuO光电阴极。CuO光电阴极的光电流产生量约为3 mA / cm ²在0 V v / s RHE时。飞行时间二次离子质谱（TOF-SIMS）分析和X射线光谱（XPS）证实了富氧（富O）的CuO膜的形成，该膜证明了高度稳定的光电阴极，保留的光电流约为90％ 20分钟详细讨论了化学组成对光电阴极性能和稳定性的影响。另外，沉积有Au-Pd纳米结构的富含O的CuO光电阴极显示出增强的光电化学性能。线性扫描伏安法特性表明，Au-Pd沉积后光电流增强了约25％，并达到了约4 mA / cm ^2。RHE为“ 0” V v / s时。氢的析出速度显着取决于CuO的元素组成和金属纳米结构。目前的工作已经证明了具有高光电流的稳定光电阴极，可用于可见光驱动的水分解和制氢。

更新日期：2017-08-08

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