Kim, Jung Hyun Karng, Sarng Woo Oh, In-Hwan Nah, In Wook 2024-01-20T05:33:44Z 2024-01-20T05:33:44Z 2021-09-05 2015-11-02 0360-3199 https://pubs.kist.re.kr/handle/201004/124767 In this study, mesoporous Cr2O3 catalysts are prepared by use of the hard template method using mesoporous silica (SBA-15) as template, the prepared catalysts were characterized, and investigated for ortho to para hydrogen. The Cr2O3 catalysts at post-treated temperature at 150 degrees C have the largest BET surface area of 230 m(2) g(-1), and the length and diameter of the particles are 2 mu m and 5 nm, respectively. The highest spin conversion from ortho to para hydrogen was observed for the mesoporous Cr2O3 catalysts with the largest surface area post-treated at 150 degrees C in the range from 150 to 300 degrees C. The nanowire array morphology of the powders was maintained at the post-treatment temperature ranges of 150 and 200 degrees C. However, when temperature increased up to 300 degrees C, the nanowire array morphology disappeared. It was showed that the spin conversion process was strongly dependent on various factors such as BET surface area, calcination temperature and morphology of mesoporous Cr2O3 catalysts. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD STORAGE LIQUID Ortho-para hydrogen conversion characteristics of amorphous and mesoporous Cr2O3 powders at a temperature of 77 K Article 10.1016/j.ijhydene.2015.08.105 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.40, no.41, pp.14147 - 14153 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 40 41 14147 14153 scie scopus 000364256200006 2-s2.0-84948712429 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article STORAGE LIQUID Hard-template method Chromium oxide Mesoporous materials Para hydrogen conversion Catalysts