Proton conducting solids

Hydrogen pumps — are electrochemical devices with proton-conducting - solid electrolytes, where hydrogen is transported through a dense electrolyte membrane by an applied electrical field. The device... 

Proton conducting solid electrolyte - solid electrolyte... 

Halla JD, Mamak M, Williams DE, Ozin GA (2003) Meso-SiO2-C12EO10OH-CF3SO3H - a novel proton-conducting solid electrolyte. Adv Funct Mater 13 133-8... 

Most proton conducting solids until fairly recently were inorganic hydrates and stable conductivities much above 150 °C in such materials are seldom found (i.e. after the water is lost, conductivity disappears) moreover, the conductivity is highly dependent on the water content, including the surface water of the material. Thus there is a need to develop proton conductors for various applications in the higher temperature range, which are not dependent on water content. 

Iwahara, H., High temperature-type proton conductive solid oxide fuel cells using various fuels,/. Appl. Electrochem., 16, 663-668 (1986). 

Iwahara, H., Uchida, H., and Maeda, N., High Temperature fuel and steam electrolysis cells using proton conductive solid electrolytes, J. Power Sources, 1, 293 - 301, 1982. 

Iwahara, H., Uchida, H., and Yamasaki, L, High-temperature steam electrolysis using SrCeOj-based proton conductive solid electrolyte, Int. J. Hydrogen Energy, 12, 73, 1987. 

Proton-conducting solid electrolytes are closely related to alkali ion conductors and are likely to receive increasing attention in EP applications with respect to both fundamental issues and technical applications. Both aspects are therefore illustrated in this section. 

Japanese researchers [248] have designed an apparatus for the electrochemical reduction of carbon dioxide employing ultrasound. The apparatus comprises an electrolytic cell containing C02-dissolved electrolytic solution, a porous Pt-group metal anode, a proton-conductive solid electrolyte having a porous metal cathode used as a catalyst for the electrochemical reduction of COz on one side and a second anode on the other side facing oppositely to the cathode, and an ultrasonic vibrator. C02 can be reduced effectively for a long time. 

Narayanan, B.K., Akbar, S.A. and Dutta, P.K. (2002) A phosphate-based proton conducting solid electrolyte hydrogen gas sensor. Sens. Actuators B, 87, 480-6. 

In the area of dense membrane applications for hydrogenation reactions a number of recent studies also report the use of proton conducting solid oxide membranes (Otsuka and Yagi [2.86], Panagos et al. [2.87], Mamellos and Stoukides [2.88]). As noted previously, this is an exciting class of new materials with significant potential applications. 

Synthesis and Characterization of a New Class of Ceramic Proton Conducting Solid Electrolytes, Steve W. Martin, Steven A. Poling, and Jacob T. Sutherland, 20 Meeting of The Electrochemical Society, Philadelphia, PA, May 12-17, 2002. 

High ion/proton conductive solids are highly important in various electrochemical applications such as electric cells, sensors, etc. The water-based materials face several disadvantages [37]. Gels prepared by the sol-gel route are materials whose macroscopic appearance is solid-like but exhibit liquid-like phenomenon microscopically. This is due to the presence of large numbers... 

Mecerreyes D, Grande H, Miguel O, Ochoteco E, Marcilla R, Cantero I (2004) Porous polyhenzimidazole membranes doped with phosphoric acid highly proton-conducting solid electrolyte. Chem Mater 16 604-607... 

The use of a proton conducting solid electrolyte in a fuel-cell has distinctive features compared with that of oxide ion conductors. As... 

Table 1. Possible applications of high temperature proton conducting solid electrolytes...

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. 

Chiang P H, Eng D, Panagiotis T and Stoukides M (1995), Ion transport and polarization studies in a proton conducting solid electrolyte cell . Solid State Ionics, 77,305-310. 

Kalimeri K K, Athanasiou C I and Marnellos G E (2010), Electro-reduction of nitrogen oxides using steam electrolysis in a proton conducting solid electrolyte membrane reactor (H+-SEMR) , Solid State Ionics, 181,223-229. 

Bi, L., Zhang, S., Fang, S., Tao, Z., Peng, R., Liu, W. (2008). A novel anode supported BaCeo.7Tao.iYo,203 5 electrolyte membrane for proton-conducting solid oxide fuel cell. Electrochemistry Commununications, 10, 1598—1601. 

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