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Title: Synthesis of Highly Effective α-Fe2O3 Catalyst for the Spin Conversion of Liquid Hydrogen
Authors: Das T.
Choi J.-G.
Oh I.-H.
Published in: Proceedings of the National Academy of Sciences India Section A - Physical Sciences
Abstract: A series of α-Fe O catalysts were prepared by precipitation method by changing calcination temperatures, solvents, precursor concentration, and bases. The structure and morphology of the synthesized catalysts were characterized by SEM, XRD, XPS, and Raman spectroscopy, and the liquid-phase spin conversion of ortho-hydrogen to para-hydrogen was performed by in situ FTIR spectroscopy at cryogenic temperature 17 K. The spin conversion was affected by catalysts calcination temperature, initial precursor concentration, solvents used, and precipitating agent. The highly dispersed and most active α-Fe O was obtained using double-distilled water as solvent and sodium hydroxide solution as precipitating agent followed by calcination at 393 K for 12 h. The formation of hydrated Fe (OH) or FeOOH during synthesis of α-Fe O at 393 K dramatically enhanced the catalytic activity and ortho to para-hydrogen spin conversion. 
Citation: Proceedings of the National Academy of Sciences India Section A - Physical Sciences(2020), 90(3): 399-409
Issue Date: 2020
Publisher: Springer
Keywords: In situ FTIR
Ortho to para-hydrogen spin conversion
XRD, XPS, Raman, and SEM
α-Fe2O3 catalyst
ISSN: 3698203
Author Scopus IDs: 7201461586
Author Affiliations: Das, T., Heterogeneous Catalysis Laboratory, Department of Chemical Engineering, Indian Institute of Technology Roorkee, Haridwar, 247667, India
Choi, J.-G., Department of Chemical Engineering, Hannam University, Daejon, 300-791, South Korea
Oh, I.-H.
Funding Details: .2013K000402 Hannam University, HNU.This research work was supported by Convergence Research Program funded by the Ministry of Future Creation and Science (2013K000402), South Korea. J. Choi appreciates Hannam University for the supporting the period from April 1, 2017 to March 31, 2018. T.
Corresponding Author: Das, T.; Heterogeneous Catalysis Laboratory, India; email:
Appears in Collections:Journal Publications [CH]

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