Powder-based (CuGa1−yIny)1−xZn2xS2 solid solution photocathodes with a largely positive onset potential for solar water splitting†,Sustainable Energy & Fuels

当前位置： X-MOL 学术 › Sustain. Energy Fuels › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Powder-based (CuGa1−yIny)1−xZn2xS2 solid solution photocathodes with a largely positive onset potential for solar water splitting†
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2018-03-23 00:00:00 , DOI: 10.1039/c8se00079d
Toshio Hayashi _{1,

2,

3,

4,

5} , Ryo Niishiro _{1,

2,

3,

4,

5} , Hitoshi Ishihara _{1,

2,

3} , Masaharu Yamaguchi _{2,

3,

6,

7} , Qingxin Jia _{2,

3,

6,

7} , Yongbo Kuang _{2,

3,

6,

7} , Tomohiro Higashi _{2,

3,

6,

7} , Akihide Iwase _{3,

8,

9,

10,

11} , Tsutomu Minegishi _{2,

3,

6,

7} , Taro Yamada _{2,

3,

6,

7} , Kazunari Domen _{2,

3,

6,

7} , Akihiko Kudo _{3,

8,

9,

10,

11}

Affiliation

Photoelectrochemical water splitting has attracted much attention in recent years as an alternative energy source. However, there have been several significant issues such as low efficiency, high cost and less scalability for its practical application. Here, we show that (CuGa_1−yIn_y)_1−xZn_2xS₂ (CGIZS)-based photocathodes fabricated with a particle transfer method exhibited a photocurrent of 4.5 mA cm⁻² at 0.6 V vs. RHE along with a largely positive onset potential of 1.0 V vs. RHE under simulated sunlight (AM 1.5G) and an initial solar-to-hydrogen energy conversion efficiency of 1.1% was obtained with photoelectrochemical water splitting using a two-electrode cell composed of the CGIZS-based photocathode and a BiVO₄-based photoanode. CGIZS used for the particle transfer method was obtained in a powder state with high crystallinity by a flux method using a molten-salt of LiCl–KCl, and also formed solid solutions with a chalcopyrite single phase structure in a wide range of Ga/In ratios and Zn contents, in which the absorption edges of photocatalysts were tunable up to 880 nm.

中文翻译：

基于粉末的（CuGa ₁ - _y In _y）_{1- x} Zn _{2 x} S ₂固溶体光电阴极，具有很强的太阳能分水起始电位†

近年来，光电化学水分解作为替代能源受到了广泛的关注。然而，对于其实际应用而言，存在一些重大问题，例如效率低，成本高和可扩展性差。在这里，我们表明，使用粒子转移方法制造的基于（CuGa _{1- y} In _y）_{1- x} Zn _{2 x} S ₂（CGIZS）的光电阴极在0.6 V vs. RHE时表现出4.5 mA cm ^-2的光电流，以及相对于V的1.0 V的起始正电位大体上为正。通过使用由基于CGIZS的光电阴极和BiVO ₄的光电阳极组成的两电极电池进行光电化学水分解，在模拟阳光（AM 1.5G）和初始太阳能能量转换效率为1.1％的条件下获得了RHE 。通过使用LiCl-KCl的熔融盐通过熔剂法以高结晶度的粉末状态获得用于颗粒转移法的CGIZS，并且还形成了具有宽Ga / In比范围的黄铜矿单相结构的固溶体和Zn含量，其中光催化剂的吸收边缘可调节至880nm。

更新日期：2018-03-23

点击分享查看原文

点击收藏

阅读更多本刊最新论文