ELECTROCHEMICAL INVESTIGATIONS OF POLYCRYSTALLINE HXNB2O5

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Schwitzgebel G, Unruh T
Zeitschrift: Journal of Solid State Chemistry
Verlag: ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
Jahr der Veröffentlichung: 1995
Band: 115
Heftnummer: 1
Seitenbereich: 260-264
ISSN: 0022-4596


Abstract


Polycrystalline samples of HxNb2O5 were prepared by electrochemical reduction of pressed and sintered powder samples of the H-Nb2O5 modification. The hydrogen content of the bronze was determined by redox titration. The electrode potential showed that the bronze is thermodynamically unstable with respect to decomposition into Nb2O5 and gaseous hydrogen. The hydrogen loss obeys a second order rate law. The electrode potential fulfills Nernst's law with a square dependence on the hydrogen content. The specific resistance of H0.18Nb2O5 determined by four-point de measurements amounts to rho(30 degrees C) = (0.0110 +/- 0.0015) Omega cm. The protonic conductivity of the bronze was substantiated by polarization experiments and the diffusion coefficient of H-. (D approximate to 5 x 10(-9) cm(2)/sec) was estimated from the rate law of the depolarization voltage. (C) 1995 Academic Press, Inc.



FAU-Autoren / FAU-Herausgeber

Unruh, Tobias Prof. Dr.
Professur für Nanomaterialcharakterisierung (Streumethoden)


Autor(en) der externen Einrichtung(en)
Universität des Saarlandes


Zitierweisen

APA:
Schwitzgebel, G., & Unruh, T. (1995). ELECTROCHEMICAL INVESTIGATIONS OF POLYCRYSTALLINE HXNB2O5. Journal of Solid State Chemistry, 115(1), 260-264.

MLA:
Schwitzgebel, Günter, and Tobias Unruh. "ELECTROCHEMICAL INVESTIGATIONS OF POLYCRYSTALLINE HXNB2O5." Journal of Solid State Chemistry 115.1 (1995): 260-264.

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