Proton-conducting oxide with redox protonation and its application to a hydrogen sensor with a self-standard electrode. Issue 40 (6th April 2016)

• Record Type: Journal Article
• Authors: Okuyama, Yuji; Nagamine, Shinya; Nakajima, Akira; Sakai, Go; Matsunaga, Naoki; Takahashi, Fusako; Kimata, Koji; Oshima, Tomoko; Tsuneyoshi, Koji
• Is Part Of: RSC advances. Volume 6:Issue 40(2016)
• Page Start: 34019
• Page End: 34026
• Publication Date: 2016-04-06
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra23560j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The hydrogen sensor using CaZr0.95 Mn0.05 O3 as electrolyte depends only on the hydrogen potential of the working electrode when air was used as the reference gas. Abstract : In order to simplify the structure of the EMF-type hydrogen sensor using a proton conductor as the electrolyte, an electrolyte serving as a self-standard electrode in air was developed. The electrochemical properties and proton dissolution mechanism of Mn-doped CaZrO3 were evaluated by impedance analysis, EMF measurement, IR absorption analysis and ESR measurement. Mn-doped CaZrO3 acquires a proton from hydrogen by reduction of the manganese ion. 5 mol% Mn doped CaZrO3 showed proton conduction in a reducing atmosphere and hole conduction in an oxidizing atmosphere. A gas concentration cell using CaZr0.95 Mn0.05 O3− δ as the electrolyte was constructed for use as a hydrogen sensor. It was found to be dependent only on the hydrogen potential of the working electrode when air was used as the reference gas.