A COMPARISON OF HYDROGEN PRODUCTION BY WATER SPLITTING ON THE SURFACE OF α‐, δ‐ AND γ‐Al2O3. Issue 34 (9th September 2022)

• Record Type: Journal Article
• Authors: Ali, Imran; Imanova, Gunel; Agayev, Teymur; Aliyev, Anar; Alharbi, Omar M. L.; Alsubaie, Abdullah; Almalki, Abdulraheem S. A.
• Is Part Of: ChemistrySelect. Volume 7:Issue 34(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-09
• Subjects: Alumina -- Hydrogen production by water splitting -- Radiation-catalytic -- Radiation-heterogeneous processes -- Radiation-thermocatalytic activities; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202202618
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Water splitting is becoming one of the most important processes for producing green fuel hydrogen. Among various materials, alumina provides the best surface for water splitting to generate green energy hydrogen. Therefore, radiation‐catalytic and radiation‐thermocatalytic activities of the polymorphic forms of Al2 O3 (α‐, δ‐, γ‐) in the water decomposition process were studied at various temperatures. It is established that γ‐Al2 O3 has relatively high radiation‐catalytic properties in the process of water decomposition. The maximum yields of the radiation‐chemical molecular hydrogen at 873 K for 30 hrs were 4.5, 5.8, and 7.0 N(H2 )×10 −18 molecules/g for α‐, δ‐ and γ‐Al2 O3 ; indicating the best performance of γ‐Al2 O3 . The pattern of accumulation of localized states of non‐equilibrium charge carriers in polymorphic forms of γ‐Al2 O3 was determined. Furthermore, the proposed mechanisms of energy transfer and lengths of energy transfer in radiation‐heterogeneous processes of water decomposition were determined. The developed method may be used to produce hydrogen fuel on a large scale. Abstract : Water splitting for green fuel hydrogen productionis achieved. A comparison of hydrogen production was carried out using three forms of alumina i. e. α‐, δ‐, and γ‐alumina; with maximum production using γ‐Al2O3 (20.0 molecules/100 eV at 723 K). The developed method may be used to produce hydrogen fuel at a large scale.