Abstract
MoO3 and 5% MoO3/ZnO were prepared by impregnation method using (NH4)6Mo7O24, 4H2O as precursor and ZnO as support. The prepared samples were characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), infra red (FTIR) and UV-Vis diffuse reflectance (DRS) spectroscopies and photo-electrochemistry. The XRD pattern showed that the MoO3 powder treated at 700°C is a single-phase crystallizing in an orthorhombic structure with a direct optical transition (2.70 eV). The hetero-junction 5% MoO3/ZnO was photo-electrochemically characterized to assess its feasibility for H2 production under visible light. The capacitance potential (C-2 f(E)) characteristic of MoO3 plotted in Na2SO4, (0.1 M) electrolyte indicates n-type conduction with a flat band potential of -0.54 VSCE. The photocatalytic activity was performed for the photoreduction of water to hydrogen under visible light illumination. The best performance occurs at pH ~ 7 with an evolved volume of 5.9 mL.
Highlights
IntroductionThe energy supply is becoming a major problem facing our civilization and increasing demand, leading to the exhaustion of natural resources (coal, oil, gas, etc.)
Nowadays, the energy supply is becoming a major problem facing our civilization and increasing demand, leading to the exhaustion of natural resources
The prepared samples were characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), infra red (FTIR) and UV-Vis diffuse reflectance (DRS) spectroscopies and photo-electrochemistry
Summary
The energy supply is becoming a major problem facing our civilization and increasing demand, leading to the exhaustion of natural resources (coal, oil, gas, etc.). The development of an efficient and low-cost energy carrier has recently alerted scientists to the promising approach of directly converting renewable energy into hydrogen [2] [3] [4] This approach focuses on the H2 production from solar energy using photo-electrochemical oxides. In this perspective, hydrogen is a promising energetic vector due to its being used as a clean status, like fuel cells, in both the transport and industrial sectors. Hydrogen is a promising energetic vector due to its being used as a clean status, like fuel cells, in both the transport and industrial sectors It differs from other primary energetic sources in that it must be manufactured just before utilization due to the difficult storage or liquefaction. Hydrogen can be produced by various methods such as water electrolysis [5] [6] [7] [8] [9], coal gasification and methane reforming (steam reforming, oxidation and dry reforming) [10] [11]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
