Oxygen nonstoichiometry of copper-containing lanthanum cobaltite LaCo1-xCuxO3-delta (x=0.3) / Petrov AN,Zuev AY,Pankov DV,Buyanova ES // RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY. - 2004. - V. 78, l. 2. - P. 158-160.

ISSN/EISSN:

0036-0244 / нет данных

Type:

Article

Abstract:

Oxygen nonstoichiometry (delta) of copper-containing lanthanum cobaltite LaCo1-xCuxO3-delta (x = 0.3). was studied by high-temperature thermogravimetry in the temperature and oxygen pressure ranges 873-1273 K and 10(-3)-1 atm, respectively. Partial substitution of copper for cobalt was shown to result in the formation of acceptor defects Cu'(Co) (Cu2+)and the appearance of holes h. or Co.(Co) (Co4+) and to facilitate the formation of positive oxygen vacancies Vo (Vo(2+)). Oxygen exchange between the solid and gas phases was described by the reaction LaCo1-23+Cox4+ Cu-x(2+) O-3 = LaCo1-2x+2delta3+Cox-2delta4+Cux2+ O(3-delta)Vo(2+) + (delta/2)O-2. The partial molar enthalpies Delta(H) over bar degrees (O-2) and entropies Delta(S) over bar degrees (O-2) of oxygen release from the solid phase were calculated. The combinatorial and noncombinatorial contributions to the entropy were found.

Author keywords:

PEROVSKITE-TYPE OXIDES; LAMN1-XCUXO3

DOI:

нет данных

Web of Science ID:

ISI:000189118500005

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB
Publisher	INTERPERIODICA
Address	PO BOX 1831, BIRMINGHAM, AL 35201-1831 USA
Language	English
Keywords-Plus	PEROVSKITE-TYPE OXIDES; LAMN1-XCUXO3
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Physical
Author-Email	alexader.petrov@usu.ru
ResearcherID-Numbers	Zuev, Andrey/E-6220-2014 Buyanova, Elena/M-2159-2016
Number-of-Cited-References	12
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	3
Journal-ISO	Russ. J. Phys. Chem.
Doc-Delivery-Number	776LY