Ultrathin assembles of Porous Array for enhanced H2 evolution

Aminul Islam, and Siow, Hwa Teo and Md. Rabiul Awual, and Yap, Yun Hin Taufiq (2020) Ultrathin assembles of Porous Array for enhanced H2 evolution. Scientific Reports, 10 (1). pp. 1-14. ISSN 2045-2322

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Abstract

Since the complexity of photocatalyst synthesis process and high cost of noble cocatalyst leftovers a major hurdle to producing hydrogen (H2) from water, a noble metal-free Ni-Si/MgO photocatalyst was realized for the first time to generate H2 effectively under illumination with visible light. The catalyst was produced by means of simple one-pot solid reaction using self-designed metal reactor. The physiochemical properties of photocatalyst were identified by XRD, FESEM, HRTEM, EDX, UV-visible, XPS, GC and PL. The photocatalytic activities of Ni-Si/MgO photocatalyst at different nickel concentrations were evaluated without adjusting pH, applied voltage, sacrificial agent or electron donor. The ultrathin-nanosheet with hierarchically porous structure of catalyst was found to exhibit higher photocatalytic H2 production than hexagonal nanorods structured catalyst, which suggests that the randomly branched nanosheets are more active surface to increase the light-harvesting efficiency due to its short electron diffusion path. The catalyst exhibited remarkable performance reaching up to 714 µmolh⁻¹ which is higher among the predominant semiconductor catalyst. The results demonstrated that the photocatalytic reaction irradiated under visible light illumination through the production of hydrogen and hydroxyl radicals on metals. The outcome indicates an important step forward one-pot facile approach to prepare noble ultrathin photocatalyst for hydrogen production from water.

Item Type: Article
Uncontrolled Keywords: Photocatalyst synthesis , hydrogen , self-designed metal reactor
Subjects: T Technology > TP Chemical technology
Divisions: FACULTY > Faculty of Engineering
Depositing User: Noraini
Date Deposited: 16 Apr 2020 03:53
Last Modified: 16 Apr 2020 03:53
URI: http://eprints.ums.edu.my/id/eprint/25312

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