Solid gas and electrochemical hydrogenation properties of the selected R,R’MgNi4-xMx (R,R’ = La, Pr, Nd; M = Fe, Mn; x = 0.5, 1) alloys

Verbovytskyy, Yuriy; Kosarchyn, Yuriy; Zavaliy, Ihor

doi:10.17721/fujcV8I2P126-139

Solid gas and electrochemical hydrogenation properties of the selected R,R’MgNi4-xMx (R,R’ = La, Pr, Nd; M = Fe, Mn; x = 0.5, 1) alloys

Тип публікації :

Стаття

Дата випуску :

2020

Автор(и) :

Verbovytskyy, Yuriy

Kosarchyn, Yuriy

Zavaliy, Ihor

Мова основного тексту :

Англійська

eKNUTSHIR URL :

https://ir.library.knu.ua/handle/15071834/25427

DOI :

10.17721/fujcV8I2P126-139

Журнал :

French-Ukrainian Journal of Chemistry

Том :

8

Випуск :

2

ISSN :

2312-3222

Початкова сторінка :

126

Кінцева сторінка :

139

Цитування :

[APA 7] Verbovytskyy, Y., Kosarchyn, Y., & Zavaliy, I. (2020). Solid gas and electrochemical hydrogenation properties of the selected R,R’MgNi4-xMx (R,R’ = La, Pr, Nd; M = Fe, Mn; x = 0.5, 1) alloys. French-Ukrainian Journal of Chemistry, 8(2), 126–139. https://doi.org/10.17721/fujcV8I2P126-139

[ДСТУ] Verbovytskyy Y., Kosarchyn Y., Zavaliy I. Solid gas and electrochemical hydrogenation properties of the selected R,R’MgNi4-xMx (R,R’ = La, Pr, Nd; M = Fe, Mn; x = 0.5, 1) alloys. French-Ukrainian Journal of Chemistry. 2020. Vol. 8, no. 2. P. 126—139. DOI: 10.17721/fujcV8I2P126-139 (date of access: 25.07.2026).

New R,R’MgNi4-xMx (R,R’ = La, Pr, Nd; M = Fe, Mn; x = 0.5, 1) phases with cubic structure have been synthesized by powder sintering method. By the hydrogenation of the parent alloys seven hydrides with cubic (LaMgNi3.5Fe0.5H6.0, PrMgNi3.5Mn0.5H~6 and NdMgNi3.5Mn0.5H~5) and orthorhombic (PrMgNi3.5Fe0.5H4.5, NdMgNi3.5Fe0.5H4.3, La0.5Pr0.5MgNi3.5Fe0.5H4.6 and La0.5Nd0.5MgNi3.5Fe0.5H4.4) structures were obtained. The relationship between the structure, hydrogen content and the relative increase of the lattice volume of the new and early known hydrides is shown. Electrochemical parameters of the electrodes based on new materials are compared with already known ones. Highest discharge capacity is observed for PrMgNi3.5Mn0.5 (271 mAh/g) and NdMgNi3.5Mn0.5 (263 mAh/g). The best cyclic stability was seen for the electrode based on NdMgNi3.5Fe0.5 (S50 = 74%).

Ключові слова :

alloys intermetallics hydrides phase composition hydrogenation

Файл(и) :

Завантажити

Формат :

Adobe PDF

Розмір :

2.98 MB

Контрольна сума :

(MD5):3647bc83d2ed572cbe215aa28f6315f1

Якщо не вказано інше, ця робота розповсюджується на умовах ліцензії Creative Commons Attribution 4.0 International