Hysteresis phenomenon in a reaction system of nanocrystalline iron and a mixture of ammonia and hydrogen

被引：17

作者：

Arabczyk, W. ^{[1
]}

Ekiert, E. A. ^{[1
]}

Pelka, R. ^{[1
]}

机构：

[1] West Pomeranian Univ Technol, Inst Chem & Environm Engn, 10 Pulaskiego Str, PL-70322 Szczecin, Poland

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2016年 / 18卷 / 37期

关键词：

KINETICS; THERMODYNAMICS; DECOMPOSITION; REDUCTION; CATALYST; ENERGY;

D O I：

10.1039/c6cp04606a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

During nitriding of nanocrystalline iron and reduction of iron nitrides with NH3/H-2 mixtures, at the stationary states a hysteresis phenomenon is observed where two phases coexist, according to the extended phase rule of Gibbs due to the presence of an additional degree of freedom associated with the size of the nanocrystallites. Nanocrystallites transform from the biggest ones to the smallest due to differences in energy demand.

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收藏

页码：25796 / 25800

页数：5

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