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Development of Solid Electrolyte ECP Sensor for High Temperature Water System

高温水系统固体电解质ECP传感器的研制

基本信息

批准号：
08650828
负责人：
HARA Nobuyoshi
金额：
$ 1.47万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

A newly designed electrochemical potential (ECP) sensor has been developed for electrochemical measurement in high temperature water systems and its thermodynamic response has been confirmed at temperatures up to 523K.The principal findings of this work are summerized as follows.1.A solid electrolyte ECP sensor was designed and fabricated. This sensor is composed of an yttria stabilized zirconia (YSZ,ZrO_2-8mol%Y_2 O_3) disk electrode with a sputter-deposited Ni・NiO composite film on the backside, an asbestos plug soaked with a neutral phosphate buffer solution as an internal solution, and an oxidized zircaloy-4 body.2.The potential of the solid electrolyte ECP sensor with respect to an Ag/AgCl (0.1kmol・m^<-3>KCl) internal refernce electrode was independent of solution pH at temperatures over the range of 473K to 523K.3.The ECP sensor had the following linear relationship with temperature in the range of 473 to 523K :E_<YSZ/NiO>=2395-5.37T/mV vs.SHE4.The long-term stability of the sensor was confirmed through the potential measuremet combined with Pt-hydrogen electrode.5.Using the solid electrolyte ECP sensor, the measurement of anodic polarization curves of SUS 304 stainless steel in a 0.5kmol・m^<-3>Na_2SO_4 solution at temperatures up to 563K has been performed. Anodic polarization curves measured with the ECP sensor coincided with those with the Ag/AgCl internal reference electrode in the temperature range from 473 to 563K.

设计了一种新的电化学电位（ECP）传感器，用于高温水系统的电化学测量，并在高达523K的温度下证实了其热力学响应。本文的主要研究结果总结如下：设计并制作了一种固体电解质ECP传感器。该传感器由氧化钇稳定的氧化锆（YSZ,ZrO_2-8mol%Y_2 O_3）圆盘电极（背面镀有溅射沉积的Ni·NiO复合膜）、用中性磷酸盐缓冲溶液浸泡的石棉塞作为内溶液和氧化锆-4本体组成。在473K至523k的温度范围内，固体电解质ECP传感器相对于Ag/AgCl （0.1kmol·m^<-3>KCl）内参电极的电位与溶液pH无关。在473 ~ 523K范围内，ECP传感器与温度的线性关系为：E_<YSZ/NiO>=2395 ~ 5.37 t /mV vs.SHE4。通过结合pt -氢电极的电位测量，证实了传感器的长期稳定性。采用固体电解质ECP传感器，在温度高达563K的0.5kmol·m^<-3>Na_2SO_4溶液中测量了sus304不锈钢的阳极极化曲线。在473 ~ 563K的温度范围内，ECP传感器测得的阳极极化曲线与Ag/AgCl内参比电极测得的阳极极化曲线吻合。