Hydrogen absorption–desorption features and degradation mechanism of ErNi3 compound

Autor:	T.Z. Si, Li Yibu, Z.L. Chen, Q.A. Zhang, Dongming Liu, S.C. Xie
Rok vydání:	2014
Předmět:	Hydrogen Mechanical Engineering Enthalpy Metals and Alloys Analytical chemistry chemistry.chemical_element Thermodynamics Crystal structure Chemical reaction Decomposition Hydrogen storage chemistry Mechanics of Materials Desorption Materials Chemistry Degradation (geology)
Zdroj:	Journal of Alloys and Compounds. 585:650-655
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2013.09.153
Popis:	The hydrogen absorption–desorption features and degradation mechanism of ErNi 3 compound are investigated in detail. It is fount that two plateaus exist in the P – C isotherms where the lower one corresponds to ErNi 3 H ∼1.3 and the higher one to ErNi 3 H ∼4 . Their enthalpy changes are −27.42 and−23.51 kJ/mol H 2 , respectively, in hydriding process. During hydrogen absorption–desorption cycles, however, ErNi 3 shows a bad cycling performance which is attributed to partial decomposition of ErNi 3 into ErNi 2 and ErNi 5 as well as increase of host-lattice strain due to the remained H atoms.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::223a2d387b9563b27ff52e3c06edee70 https://doi.org/10.1016/j.jallcom.2013.09.153 Zobrazit plný text záznamu Full Text from ScienceDirect