Network-like CuInS2 photocathode and modified with noble metal co-catalyst for photoelectrochemical water splitting

作者：Cai, Qijun; Liu, Zhifeng^*; Ma, Chonghao; Tong, Zhengfu; Han, Changcun

来源：Journal of Materials Science: Materials in Electronics , 2018, 29(24): 20629-20638.

DOI：10.1007/s10854-018-0201-z

• PHOTOCATALYTIC H-2 EVOLUTION
• HYDROGEN EVOLUTION
• CARBON NITRIDE
• EFFICIENT
• FILM
• NANOPARTICLES
• HETEROJUNCTION
• ENHANCEMENT
• NANOSHEETS
• CDS

It is of great significance to explore new preparation methods and control the morphology and proportion of metal ions for the photoelectrochemical (PEC) water splitting of ternary sulfide photoelectrode. In this paper, the network-like CuInS2 film photocathodes were firstly prepared by hydrothermal growth method. The effects of different [Cu2+]/[In3+] molar ratios and concentrations of growth solution on CuInS2 films were investigated in detail. The mechanism of the synthetic reaction was studied. The best PEC photocurrent density of the CuInS2 film photoelectrode is -0.81mA/cm(2) at -0.6V versus RHE when the [Cu2+]/[In3+] molar ratio is 0.4, the growth solution concentration is 8mmol/L CuCl(2)2H(2)O, 20mmol/L InCl(3)4H(2)O and 60mmol/L C2H5NS. For the purpose of further improving photoelectrochemical properties of CuInS2 thin films, the Pt co-catalyst was loaded. The synthesized CuInS2-Pt thin film yielded a photocurrent density for -1.92mA/cm(2) at -0.6V versus RHE due to the fast photogenerated electrons capture ability of Pt co-catalyst. The method of constructing photoelectrode film and the co-catalyst mechanism contributes to a sensational way for PEC water splitting of sulfide.

• 出版日期2018-12
• 单位湖北工业大学; 天津城建大学