In Situ Integration of ReS2/Ni3S2 p-n Heterostructure for Enhanced Photoelectrocatalytic Performance.
Xiaoying LuRuitong LiuQiang WangCailing XuPublished in: ACS applied materials & interfaces (2019)
The excellent light absorption, low electron-hole recombination rate, and fast reaction kinetics of photogenerated charges are urgently needed for photoelectrochemical (PEC) water splitting. Herein, a novel p-n heterostructure photoelectrode (ReS2/Ni3S2) is constructed via a one-step hydrothermal method, which shows remarkable HER activity under illumination such as a low overpotential (η10) of 106 mV, high IPCE of 10-15%, and good stability. High-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) reveal that the intimate interface and strong electron interaction between ReS2 and Ni3S2 can enhance the light adsorption and provide abundant active sites. The transient absorption (TA) spectroscopy and impedance spectroscopy analyses (EIS) demonstrate the prolonged carrier lifetime and fast charge transfer. All of these are responsible for the improvement of reaction kinetics. This work provides a brand new avenue to explore efficient photoelectrocatalysts for water splitting.
Keyphrases
- high resolution
- electron microscopy
- single molecule
- aqueous solution
- mass spectrometry
- solid state
- electron transfer
- metal organic framework
- solar cells
- dna damage
- transition metal
- high speed
- wastewater treatment
- dna repair
- magnetic resonance imaging
- tandem mass spectrometry
- single cell
- heavy metals
- magnetic resonance
- risk assessment
- brain injury
- gene expression