Das, Taraknath Kweon, Soon-Cheol Choi, Jeong-Gil Kim, Seo Young Oh, In-Hwan 2024-01-20T08:01:40Z 2024-01-20T08:01:40Z 2021-09-05 2015-01-05 0360-3199 https://pubs.kist.re.kr/handle/201004/125879 A series of LaFeO3 perovskite catalysts over alumina support (LaFeO3/Al2O3) were prepared by citrate sol gel method by changing the loading of LaFeO3 on alumina. The morphology and structure of perovskite catalysts were characterized by SEM, XRD, Raman spectroscopy, and the spin conversion of ortho hydrogen to para hydrogen was investigated by in situ FTIR spectroscopy at 17 K temperature. The spin conversion was primarily affected by the dispersion of perovskite phase over the support, the weight percent of LaFeO3 loading on alumina, and the ratio of lanthanum to iron in LaFeO3. The perovskite phase was formed at 1173 K, and less sintered and more dispersed at lower calcination temperatures. Thus, the highest spin conversion was observed for the perovskite catalyst calcined at 773 K with 20LaFeO(3)/Al2O3 and the 2:8 ratio of La to Fe (20La(0.2)Fe(0.8)O(3)/Al2O3), where 99.8% of ortho hydrogen at 17 K was converted into para hydrogen in 120 min interaction with the perovskite catalyst. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD PARAHYDROGEN-INDUCED POLARIZATION HETEROGENEOUS HYDROGENATION STORAGE SPECTROSCOPY PEROVSKITES CONVERTER OXIDE LA HYPERPOLARIZATION PERFORMANCE Spin conversion of hydrogen over LaFeO3/Al2O3 catalysts at low temperature: Synthesis, characterization and activity Article 10.1016/j.ijhydene.2014.10.137 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.40, no.1, pp.383 - 391 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 40 1 383 391 scie scopus 000348687300039 2-s2.0-84916636389 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article PARAHYDROGEN-INDUCED POLARIZATION HETEROGENEOUS HYDROGENATION STORAGE SPECTROSCOPY PEROVSKITES CONVERTER OXIDE LA HYPERPOLARIZATION PERFORMANCE Perovskite catalysts Ortho hydrogen Para hydrogen Spin conversion LaFeO3/Al2O3 In situ FTIR spectroscopy