TY - JOUR

T1 - Hydrogen transport mechanism through Ni-NiO system investigation

AU - Gabis, I. E.

AU - Kompaniets, T. N.

AU - Kurakin, V. A.

AU - Kurdyumov, A. A.

AU - Piven', V. A.

PY - 1991/7/1

Y1 - 1991/7/1

N2 - A new version of the concentration wave method is helpful is estimating the mechanism of hydrogen transfer through a NiO film. A mathematical model which adequately describes the process is offered. Arguments are advanced in favour of association-dissociation processes on inner NiO-Ni surfaces rather than on free NiO surfaces and in support of hydrogen movement as molecules along the oxide with a high porosity. The hydrogen diffusion coefficients between 643-783 K are determined in Ni and NiO (D1 and D2, respectively) and given by equations D1=4×10-3 exp (-4200÷T) and D2=200 exp (-17000÷T) cm2÷s. The D1 values are shown to be in close agreement with the data of measurements on nonoxidized Ni.

AB - A new version of the concentration wave method is helpful is estimating the mechanism of hydrogen transfer through a NiO film. A mathematical model which adequately describes the process is offered. Arguments are advanced in favour of association-dissociation processes on inner NiO-Ni surfaces rather than on free NiO surfaces and in support of hydrogen movement as molecules along the oxide with a high porosity. The hydrogen diffusion coefficients between 643-783 K are determined in Ni and NiO (D1 and D2, respectively) and given by equations D1=4×10-3 exp (-4200÷T) and D2=200 exp (-17000÷T) cm2÷s. The D1 values are shown to be in close agreement with the data of measurements on nonoxidized Ni.

UR - http://www.scopus.com/inward/record.url?scp=0026193723&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0026193723

VL - 27

SP - 18

EP - 22

JO - ФИЗИКО-ХИМИЧЕСКАЯ МЕХАНИКА МАТЕРИАЛОВ

JF - ФИЗИКО-ХИМИЧЕСКАЯ МЕХАНИКА МАТЕРИАЛОВ

SN - 0430-6252

IS - 4

ER -