Development of a solid-state reference electrode for high-temperature aqueous environments containing hydrogen. Final report
SRI International has developed a solid state electrode capable of providing a stable reference potential under a wide range of temperatures and chemical conditions. The electrode consists of a zirconia or yttria-stabilized zirconia tube packed with an inorganic polymer electrolyte and A silver/silver chloride sensing element. The sensing element is maintained near room temperature by a passive cooling heat sink. The solid electrolyte in the reference electrode suffers minimal diffusion losses and is thus well suited for long-term operation. The electrode stability was demonstrated by testing it in high temperature (280{degrees}C) aqueous solutions over extended periods of time. The electrode, which was not affected by oxidizing (air) or reducing (H2) atmospheres or by changes in pH, provides an excellent reference potential for electrochemical measurements. The solid state reference electrode was calibrated using an external pressure balanced reference electrode and a hydrogen electrode from room temperature to 300{degrees}C. This solid state reference electrode is useful in many applications, particularly for monitoring the high temperature aqueous chemistry in nuclear and fossil power plants.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States); SRI International, Menlo Park, CA (United States)
- Sponsoring Organization:
- Electric Power Research Inst., Palo Alto, CA (United States)
- OSTI ID:
- 262970
- Report Number(s):
- EPRI-TR-106602; TRN: 96:004245
- Resource Relation:
- Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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