Thermogravimetric study of the kinetics of Co3O4 reduction by hydrogen

被引：41

作者：

Tomic-Tucakovic, Biljana ^{[2
]}

Majstorovic, Divna ^{[2
]}

Jelic, Dijana ^{[3
]}

Mentus, Slavko ^{[1
,4
]}

机构：

[1] Univ Belgrade, Fac Phys Chem, Belgrade 11158, Serbia

[2] Inst Gen & Phys Chem, Belgrade 11158, Serbia

[3] Univ Banja Luka, Fac Med, Chair Phys Chem, Banja Luka 78000, Bosnia & Herceg

[4] Serbian Acad Arts & Sci, Belgrade 11158, Serbia

来源：

THERMOCHIMICA ACTA | 2012年 / 541卷

关键词：

Cobalt(II; III); oxide; Kinetic parameters; Reduction by hydrogen; Particle size effects; Thermogravimetry; LOW-TEMPERATURE REDUCTION; COBALT OXIDE; THIN-FILMS; THERMAL-DECOMPOSITION; SUPPORTED CO3O4; METAL-OXIDES; VAPOR; PERFORMANCE; SURFACE; NICKEL;

D O I：

10.1016/j.tca.2012.04.018

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Cobalt(II,III) oxide (Co3O4), synthesized by gel-combustion method, thermally treated in air at temperatures 400, 600 and 800 degrees C, was subjected to the reduction to metallic state in hydrogen atmosphere. The reduction was carried out at several constant heating rates and controlled by thermogravimetry. The mass vs. temperature curves were analyzed from the kinetic aspect. The two-step reduction was confirmed. Both the hydrogen partial pressure and the sample history influenced the reduction kinetics. The activation energies of both reduction steps were determined by means of Friedman isoconversional method and Kissinger methods, and the values obtained by Kissinger method were used to fit the experimental data by means of expanded Prout-Tompkins reaction model. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：15 / 24

页数：10

共 84 条

[1] Optical recognition of CO and H-2 by use of gas-sensitive Au-Co3O4 composite films [J].

Ando, M ;

Kobayashi, T ;

Iijima, S ;

Haruta, M .

JOURNAL OF MATERIALS CHEMISTRY, 1997, 7 (09) :1779-1783

[2] Cobalt oxide films for solar selective surfaces, obtained by spray pyrolisis [J].

Avila, AG ;

Barrera, EC ;

Huerta, LA ;

Muhl, S .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2004, 82 (1-2) :269-278

[3] Granulation, Phase Change, and Microstructure - Kinetics of Phase Change. III [J].

Avrami, M .

JOURNAL OF CHEMICAL PHYSICS, 1941, 9 (02) :177-184

[4] Thermal synthesis of nanocrystalline (CoxNi1-x)yFe1-y KOVAR alloy through gaseous reduction of mixed oxides [J].

Bahgat, M. ;

Paek, Min-Kyu ;

Park, Chul-Hwan ;

Pak, Jong-Jin .

MATERIALS TRANSACTIONS, 2008, 49 (01) :208-214

[5]

BALAKIREV VF, 1960, DOKL AKAD NAUK SSSR+, V135, P1127

[6]

Balakirev VF., 1963, RUSS J APPL CHEM, V36, P1458

[7]

Barreca D, 2001, CHEM MATER, V13, P588, DOI [10.1021/cm001041x, 10.1021/cm00104lx]

[8] A new cobalt oxide electrodeposit bath for solar absorbers [J].

Barrera, E ;

Gonzalez, I ;

Viveros, T .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 1998, 51 (01) :69-82

[9]

BELOUSOV VM, 1990, UKR KHIM ZH+, V56, P21

[10] LOW-TEMPERATURE HYDROGEN REDUCTION OF PURE CO3O4 AND DOPED WITH PALLADIUM [J].

BELOUSOV, VM ;

STOCH, J ;

BATCHERIKOVA, IV ;

ROZHKOVA, EV ;

LYASHENKO, LV .

APPLIED SURFACE SCIENCE, 1989, 35 (04) :481-494

← 1 2 3 4 5 6 7 8 9 →