Das, Taraknath Choi, Jeong-Gil Oh, In-Hwan 2024-01-19T16:34:02Z 2024-01-19T16:34:02Z 2022-01-25 2020-09 0369-8203 https://pubs.kist.re.kr/handle/201004/118153 A series of alpha-Fe(2)O(3)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 alpha-Fe(2)O(3)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)(3)or FeOOH during synthesis of alpha-Fe(2)O(3)at 393 K dramatically enhanced the catalytic activity and ortho to para-hydrogen spin conversion. English NATL ACAD SCIENCES INDIA Synthesis of Highly Effective alpha-Fe(2)O(3)Catalyst for the Spin Conversion of Liquid Hydrogen Article 10.1007/s40010-019-00599-3 1 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES, v.90, no.3, pp.399 - 409 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES 90 3 399 409 N scie scopus 000563491000003 2-s2.0-85064208004 Multidisciplinary Sciences Science & Technology - Other Topics Article POROUS ALPHA-FE2O3 OXIDE-FILMS IRON TEMPERATURE OXIDATION CATALYSTS FE2O3 CONVERTER CO HYPERPOLARIZATION alpha-Fe(2)O(3)catalyst Ortho to para-hydrogen spin conversion XRD, XPS, Raman, and SEM In situ FTIR