Kim, Ji Woo Shim, Jae-Hyeok Kim, Seul Cham Remhof, Arndt Borgschulte, Andreas Friedrichs, Oliver Gremaud, Robin Pendolino, Flavio Zuettel, Andreas Cho, Young Whan Oh, Kyu Hwan 2024-01-20T21:03:34Z 2024-01-20T21:03:34Z 2021-09-03 2009-07-15 0378-7753 https://pubs.kist.re.kr/handle/201004/132316 Single crystalline titanium nitride (TiN) nanopowder is synthesized by a mechano-chemical reaction between titanium chloride (TiCl3) and lithium nitride (Li3N) by means of high-energy ball milling. The TiN nanopowder has an average particle size of 6 nm and is introduced into sodium alanate (NaAlH4) as a catalyst. During hydrogen sorption cycles, TiN-catalyzed NaAlH4 exhibits a greater hydrogen desorption rate and higher hydrogen capacity than TiCl3-catalyzed NaAlH4. Contradicting thermodynamic predictions, in situ X-ray diffraction results reveal that TiN nanopowder remains stable and produces no by-products (e.g., Ti-Al compounds) in the reaction with NaAlH4 during hydrogen desorption. In situ Raman spectroscopy also confirms the stability of TiN nanopowder in NaAlH4. This implies that the sustained hydrogen sorption kinetics and hydrogen capacity of TiN-catalyzed NaAlH4 originate from the structural and chemical stability of TiN nanopowder in NaAlH4 for the given conditions of the hydrogen cycle test. (C) 2009 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV X-RAY-DIFFRACTION STORAGE MATERIALS SODIUM ALANATE DOPED NAALH4 MECHANOCHEMICAL SYNTHESIS RAMAN-SCATTERING TI-CATALYST DECOMPOSITION SPECTROSCOPY HYDRIDES Catalytic effect of titanium nitride nanopowder on hydrogen desorption properties of NaAlH4 and its stability in NaAlH4 Article 10.1016/j.jpowsour.2009.02.083 1 JOURNAL OF POWER SOURCES, v.192, no.2, pp.582 - 587 JOURNAL OF POWER SOURCES 192 2 582 587 scie scopus 000267270000047 2-s2.0-66349095538 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article X-RAY-DIFFRACTION STORAGE MATERIALS SODIUM ALANATE DOPED NAALH4 MECHANOCHEMICAL SYNTHESIS RAMAN-SCATTERING TI-CATALYST DECOMPOSITION SPECTROSCOPY HYDRIDES Hydrogen storage Sodium alanate Catalyst Titanium nitride nanopowder In situ X-ray diffraction In situ Raman spectroscopy