Obtaining particles with the structure Mg@C and (Mg@C)@Pd, their properties and stability in the hydrogenation/dehydrogenation processes : научное издание
Библиографическое описание:Obtaining particles with the structure Mg@C and (Mg@C)@Pd, their properties and stability in the hydrogenation/dehydrogenation processes : научное издание / G. N. Churilov [et al.]. - Текст : непосредственный // International Journal of Hydrogen Energy. - 2021. - № . - Cited Reference Count: 46. - Center for Common Use of the Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, This work was supported by and carried out on the equipment of the Center for Common Use of the Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences. - ISSN 0360-3199. - ISSN 1879-3487, DOI 10.1016/j.ijhydene.2021.03.042.
Аннотация:In this work, we studied the change in the properties of powders with a core (magnesium) – shell structure (carbon and carbon/palladium) in the process of hydrogenation/dehydrogenation with hydrogen (99.995 wt%). Magnesium powders were obtained by plasma chemical synthesis in an atmosphere of argon containing a small amount of hydrogen (2–3 at.%) and nitrogen (8–9 at.%), when performing a low-frequency arc discharge between a tungsten electrode and a magnesium melt. The shell (carbon and carbon/palladium) was deposited in a plasma generator with vortex and magnetic stabilization. For all samples, a decrease in the sorption capacity of hydrogen was observed as a result of successive cycles of sorption and desorption reactions. It was found that the reason for this fall is associated with the formation of the MgO and Mg(OH)<sub>2</sub> phase, which prevents the diffusion of hydrogen. The carbon shell provides a more complete hydrogenation of the magnesium particles, and an additional palladium shell increases the resistance to cyclic hydrogenation/dehydrogenation and reduces the temperature of these processes. According to the data obtained, powders with particles (Mg@C)@Pd can absorb the largest amount of hydrogen (6.9 wt%) for the duration of 5 cycles, after which the protective shell of the particles begins to collapse and a loss of sorption capacity is observed.
Издательство:Elsevier Science Publishing Company, Inc.
Источник:International Journal of Hydrogen Energy
Держатель оригинала документа:Institute of Chemistry and Chemical Technology,Federal Research Center KSC SB RAS, Institute of Engineering Physics and Radio Electronics,Siberian Federal University, Kirensky Institute of Physics,Federal Research Center KSC SB RAS
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