Conductivity Limits of Extrinsically Doped SnO2 Supports. (14th September 2015)

• Record Type: Journal Article
• Authors: Worsdale, Matthew; Rabis, Annett; Fabbri, Emiliana; Schmidt, Thomas J.; Kramer, Denis
• Is Part Of: ECS transactions. Volume 69:Number 17(2015)
• Page Start: 1167
• Page End: 1178
• Publication Date: 2015-09-14
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/06917.1167ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : We find extrinsic conductivity of Ta-doped SnO2 electro-catalyst supports to be maximal at around 1% Ta-doping. Extrinsic conductivity is limited due to two effects: (i) limited dopant solubility due to thermodynamic competition with ternary oxides, and (ii) electron localization at the Ta center leading to collaborative Jahn-Teller distortions and a freezing out of the donor state with increasing dopant concentration.