High-temperature proton conductors

Matsumoto, H., Okubo, M., Hamajina, S., Katahira, K., Iwahara, H. (2002). Extraction and production of hydrogen using high-temperature proton conductor. Solid State Ionics 152-3, 715-720. 

High-Temperature Proton Conductors Ceramic Oxides... 

NASICON can also be modified so that it conducts protons (see Ref. [69] and Chapter 7). However, alkaline-earth cerates and zirconates forming the perovskite structure are more commonly used as high-temperature proton conductors [70-78]. 

Schwandt, C. and Fray, D.J. (2006) The titanium/hydrogen system as the solid-state reference in high-temperature proton conductor-based hydrogen sensors./. Appl. Electrochem., 36, 557-65. 

Solid superacids as high-temperature proton conductors and moisture retainers... 

Carneim RD, Armstrong TR. Chemical stability of Barium cerates-based high temperature proton conductors. 225th American Chemical Society National Meeting - Fuel Division Preprint, New Orleans, LA, 2003. 

Nowick AS, Du Y. High temperature protonic conductors with perovskite-related structures. Solid State Ionics. 1995 77 137. 

H. Iwahara, High Temperature Proton Conductors Based on Perovskite-Type Oxides in Proton Conductors Solids, Membranes, Gel-Materials and Devices,... 

High temperature proton conductors based on perovskite-type oxides... 

Fuel-cells, steam-electrolysis for hydrogen production and hydrogen separation using high temperature protonic conductors... 

The electrolysis of hydrogen chloride or hydrogen disulphide to recover chlorine or sulphur, respectively, is, in principle, possible using a high temperature protonic conductor. 

No experiments in this field have been reported because the existence of high temperature proton conductors has not widely been known until now. Proton conducting solids are, however, considered to be promising materials for controlling organic reactions if they can be fabricated and used as a thin, dense film. 

By using hydrophobic fluorinated polymer backbones, the phase separation can be made more distinct in phosphonated membranes, which in turn can enhance the proton conductivity. DesMarteau and co-workers have studied the proton transport characteristics of model perfluoroacid compounds functionalized with phosphonic, phosphinic, sulfonic, and carbo)q lic acids. The results indicated that the proton transfer in phosphonic and phosphinic acids occurs via structural diffusion rather than by a vehicle mechanism. The findings suggested that fluoroallqrlphosphonic and -phosphinic acids are good candidates for further development as anhydrous, high-temperature proton conductors. 

In addition to oxygen ion conduction, perovskite oxides have attracted considerahle attention as high-temperature proton conductors, with promising apphcations in fuel cells, hydrogen sensors, and steam electrolysers [116]. 

Kokkofitis, C., Ouzounidou, M., Skodra, A., Stoukides, M. (2007). High temperature proton conductors applications in catalytic processes. Solid State Ionics, 178, 507—513. 

Electrolyte Yttria-stabilized zirconia (YSZ) Doped LaGaOs, doped Ce02, high-temperature proton conductors (e.g., doped SrCeOs)... 

Perovskite proton conductors belong to the class of high temperature proton conductors (HTPCs),... 

In order to break the thermodynamic limitation, in 1998, Marnellos at the University of Aristotelian studied electrochemical synthsis of ammonia by the reaction of nitrogen and H+ at 570°C and in atmospheric pressure with a solid electrolyte cell in which the Pd was used as electrode and the SrCeo.igsYbo.iosOs was used as high temperature proton conductor, and realized electrochemical synthesis of ammonia in high conversion at high temperature and in atmosphere pressure. The experimental instrument is showed in Fig. 10.8. 

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