Abstract
Bifunctional leaf-like CdS/MoS2 hybrids were successfully prepared by electrodeposition. The interactive influences between MoS2 and CdS on the photoelectrocatalytic activity for catalyst of CdS/MoS2 were characterized by analyzing the current density (J)–potential (V) curves of cathodic and anodic polarization. On the one hand, the CdS/MoS2 hybrid showed the improved photoelectrochemical performance which was attributed to the visible light absorption enhanced by MoS2 and the formation of p–n junction between CdS and MoS2. On the other hand, the CdS/MoS2 hybrid exhibited superior electrocatalytic activity in the hydrogen evolution reaction (HER) relative to the MoS2 catalyst. A Tafel slope of ∼42mV/decade was measured for CdS/MoS2 hybrid in the HER, which exceeded by far the activity of previous MoS2 catalysts and resulted from the abundance of catalytic edge sites on the MoS2 nanoparticles. The Tafel slope of∼42mV/decade suggested the Volmer_Heyrovsky mechanism for the CdS/MoS2-catalyzed HER, with electrochemical desorption of hydrogen as the rate-limiting step.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.