Solid gas and electrochemical hydrogenation of the selected alloys (R’,R’’)2-Mg Ni4-Co (R’, R’’ = Pr, Nd; x = 0.8–1.2; y = 0–2)

A number of alloys with the (R’, R’’)2-xMgxNi4-yCoy (R’, R’’ = Pr, Nd; x = 0.8–1.2; y = 0–2) compositions were synthesized by the sintering method and characterized by X-ray powder diffraction method. They are all with cubic MgCu4Sn structure and belong to the continuous solid solution. Gas hydrogen...

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Published in:Journal of alloys and compounds 2021-09, Vol.876, p.160155, Article 160155
Main Authors: Verbovytskyy, Yuriy, Oprysk, Volodymyr, Paul-Boncour, Valérie, Zavaliy, Ihor, Berezovets, Vasyl, Lyutyy, Pavlo, Kosarchyn, Yuriy
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Chemical Sciences
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cited_by cdi_FETCH-LOGICAL-c2455-1c3fe74e7a57cd0f051238db447fc8a0ba8d5c207ae4c1cc8f510be8b2adbb053
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container_title Journal of alloys and compounds
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creator Verbovytskyy, Yuriy
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description A number of alloys with the (R’, R’’)2-xMgxNi4-yCoy (R’, R’’ = Pr, Nd; x = 0.8–1.2; y = 0–2) compositions were synthesized by the sintering method and characterized by X-ray powder diffraction method. They are all with cubic MgCu4Sn structure and belong to the continuous solid solution. Gas hydrogenation was performed for the selected alloys and 15 new hydrides belonging to cubic or orthorhombic structures were obtained. PCT diagrams are constructed for the Nd1.2Mg0.8Ni3Co - H2 and Nd0.8Mg1.2Ni3Co - H2 systems. The influence of R/Mg and Ni/Co substitution on the discharge characteristics of the (R’, R’’)2-xMgxNi4-yCoy electrodes was studied. It was established that cobalt-doped alloys with high magnesium content show the highest discharge capacities.
doi_str_mv 10.1016/j.jallcom.2021.160155
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title Solid gas and electrochemical hydrogenation of the selected alloys (R’,R’’)2-Mg Ni4-Co (R’, R’’ = Pr, Nd; x = 0.8–1.2; y = 0–2)
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