In-situ Integration of ReS2/Ni3S2 p-n Heterostructure for Enhanced Photo-electrocatalytic Performance.

08:00 EDT 11th October 2019 | BioPortfolio

Summary of "In-situ Integration of ReS2/Ni3S2 p-n Heterostructure for Enhanced Photo-electrocatalytic Performance."

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 one-step hydrothermal method, which shows the remarkable HER activity under illumination such as the low overpotential of 106 mV at 10 mA cm-2, high IPCE of 10-15% and good stability. High-resolution transmission electron microscope (HRTEM) and X-ray photoelectron spectroscopy (XPS) reveal the intimate interface and strong electron interaction between ReS2 and Ni3S2 which can enhance the light-adsorption and provide the 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 new avenue to explore efficient photo-electrocatalysts for water splitting.


Journal Details

This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252


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