Development of Synthesis and Fabrication Process for Mn-CeO<sub>2</sub> Foam via Two-Step Water-Splitting Cycle Hydrogen Production

The effects of doping manganese ions into a cerium oxide lattice for a thermochemical two-step water-splitting cycle to produce oxygen and hydrogen and new synthesis methods were experimentally investigated. In order to comparison of oxygen/hydrogen producing performance, pristine CeO<sub>2<...

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Autores principales:	Hyun-Seok Cho, Tatsuya Kodama, Nobuyuki Gokon, Selvan Bellan, Jong-Kyu Kim
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	solar fuel hydrogen two-step water-splitting cycle ceria cerium oxide doping Technology T
Acceso en línea:	https://doaj.org/article/70690ad93886429b9ccf3934b5274dab
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spelling	oai:doaj.org-article:70690ad93886429b9ccf3934b5274dab2021-11-11T15:45:11ZDevelopment of Synthesis and Fabrication Process for Mn-CeO<sub>2</sub> Foam via Two-Step Water-Splitting Cycle Hydrogen Production10.3390/en142169191996-1073https://doaj.org/article/70690ad93886429b9ccf3934b5274dab2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/6919https://doaj.org/toc/1996-1073The effects of doping manganese ions into a cerium oxide lattice for a thermochemical two-step water-splitting cycle to produce oxygen and hydrogen and new synthesis methods were experimentally investigated. In order to comparison of oxygen/hydrogen producing performance, pristine CeO<sub>2</sub>, a coprecipitation method for Mn-CeO<sub>2</sub>, and a direct depositing method for Mn-CeO<sub>2</sub> with different particle sizes (50~75, 100–212, over 212 μm) and doping extents (0, 5, 15 mol%) were tested in the context of synthesis and fabrication processes of reactive metal oxide coated ceramic foam devices. Sample powders were coated onto zirconia (magnesium partially stabilized zirconia oxide, MPSZ) porous foam at 30 weight percent using spin coating or a direct depositing method, tested using a solar reactor at 1400 °C as a thermal reduction step and at 1200 °C as a water decomposition step for five repeated cycles. The sample foam devices were irradiated using a 3-kWth sun-simulator, and all reactive foam devices recorded successful oxygen/hydrogen production using the two-step water-splitting cycles. Among the seven sample devices, the 5 mol% Mn-CeO<sub>2</sub> foam device, that synthesized using the coprecipitation method, showed the greatest hydrogen production. The newly suggested direct depositing method, with its contemporaneous synthesis and coating of the Mn-CeO<sub>2</sub> foam device, showed successful oxygen/hydrogen production with a reduction in the manufacturing time and reactants, which was lossless compared to conventional spin coating processes. However, proposed direct depositing method still needs further investigation to improve its stability and long-term device durability.Hyun-Seok ChoTatsuya KodamaNobuyuki GokonSelvan BellanJong-Kyu KimMDPI AGarticlesolar fuelhydrogentwo-step water-splitting cycleceriacerium oxidedopingTechnologyTENEnergies, Vol 14, Iss 6919, p 6919 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	solar fuel hydrogen two-step water-splitting cycle ceria cerium oxide doping Technology T
spellingShingle	solar fuel hydrogen two-step water-splitting cycle ceria cerium oxide doping Technology T Hyun-Seok Cho Tatsuya Kodama Nobuyuki Gokon Selvan Bellan Jong-Kyu Kim Development of Synthesis and Fabrication Process for Mn-CeO<sub>2</sub> Foam via Two-Step Water-Splitting Cycle Hydrogen Production
description	The effects of doping manganese ions into a cerium oxide lattice for a thermochemical two-step water-splitting cycle to produce oxygen and hydrogen and new synthesis methods were experimentally investigated. In order to comparison of oxygen/hydrogen producing performance, pristine CeO<sub>2</sub>, a coprecipitation method for Mn-CeO<sub>2</sub>, and a direct depositing method for Mn-CeO<sub>2</sub> with different particle sizes (50~75, 100–212, over 212 μm) and doping extents (0, 5, 15 mol%) were tested in the context of synthesis and fabrication processes of reactive metal oxide coated ceramic foam devices. Sample powders were coated onto zirconia (magnesium partially stabilized zirconia oxide, MPSZ) porous foam at 30 weight percent using spin coating or a direct depositing method, tested using a solar reactor at 1400 °C as a thermal reduction step and at 1200 °C as a water decomposition step for five repeated cycles. The sample foam devices were irradiated using a 3-kWth sun-simulator, and all reactive foam devices recorded successful oxygen/hydrogen production using the two-step water-splitting cycles. Among the seven sample devices, the 5 mol% Mn-CeO<sub>2</sub> foam device, that synthesized using the coprecipitation method, showed the greatest hydrogen production. The newly suggested direct depositing method, with its contemporaneous synthesis and coating of the Mn-CeO<sub>2</sub> foam device, showed successful oxygen/hydrogen production with a reduction in the manufacturing time and reactants, which was lossless compared to conventional spin coating processes. However, proposed direct depositing method still needs further investigation to improve its stability and long-term device durability.
format	article
author	Hyun-Seok Cho Tatsuya Kodama Nobuyuki Gokon Selvan Bellan Jong-Kyu Kim
author_facet	Hyun-Seok Cho Tatsuya Kodama Nobuyuki Gokon Selvan Bellan Jong-Kyu Kim
author_sort	Hyun-Seok Cho
title	Development of Synthesis and Fabrication Process for Mn-CeO<sub>2</sub> Foam via Two-Step Water-Splitting Cycle Hydrogen Production
title_short	Development of Synthesis and Fabrication Process for Mn-CeO<sub>2</sub> Foam via Two-Step Water-Splitting Cycle Hydrogen Production
title_full	Development of Synthesis and Fabrication Process for Mn-CeO<sub>2</sub> Foam via Two-Step Water-Splitting Cycle Hydrogen Production
title_fullStr	Development of Synthesis and Fabrication Process for Mn-CeO<sub>2</sub> Foam via Two-Step Water-Splitting Cycle Hydrogen Production
title_full_unstemmed	Development of Synthesis and Fabrication Process for Mn-CeO<sub>2</sub> Foam via Two-Step Water-Splitting Cycle Hydrogen Production
title_sort	development of synthesis and fabrication process for mn-ceo<sub>2</sub> foam via two-step water-splitting cycle hydrogen production
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/70690ad93886429b9ccf3934b5274dab
work_keys_str_mv	AT hyunseokcho developmentofsynthesisandfabricationprocessformnceosub2subfoamviatwostepwatersplittingcyclehydrogenproduction AT tatsuyakodama developmentofsynthesisandfabricationprocessformnceosub2subfoamviatwostepwatersplittingcyclehydrogenproduction AT nobuyukigokon developmentofsynthesisandfabricationprocessformnceosub2subfoamviatwostepwatersplittingcyclehydrogenproduction AT selvanbellan developmentofsynthesisandfabricationprocessformnceosub2subfoamviatwostepwatersplittingcyclehydrogenproduction AT jongkyukim developmentofsynthesisandfabricationprocessformnceosub2subfoamviatwostepwatersplittingcyclehydrogenproduction
_version_	1718434089385590784

Development of Synthesis and Fabrication Process for Mn-CeO<sub>2</sub> Foam via Two-Step Water-Splitting Cycle Hydrogen Production

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