High temperature and pressure chemical sensors based on Zr/ZrO2 electrode prepared by nanostructured ZrO2 film at Zr wire

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	High temperature and pressure chemical sensors based on Zr/ZrO2 electrode prepared by nanostructured ZrO2 film at Zr wire
	Zhang, RH (Zhang, Ronghua); Zhang, XT (Zhang, Xuetong); Hu, SM (Hu, Shumin)
刊名	SENSORS AND ACTUATORS B-CHEMICAL
	2010
卷号	149 期号:1 页码:143-154
关键词	Nanostructured ZrO2 film Zr/ZrO2 electrode Zr/ZrO2 interface In situ pH measurement Hydrothermal system
ISSN号	0925-4005
英文摘要	A Zr/ZrO2 oxidation electrode was fabricated for in situ measurement of pH values of high temperature aqueous solutions. Combined with a AgiAgCl reference electrode, the Zr/ZrO2 sensor responded rapidly and precisely to the pH of the solutions over a wide range of temperatures. The Zr/ZrO2 electrode was made by oxidizing Zr metal wire with a Na2CO3 melt to produce a thin film of ZrO2 on the Zr wire surface. The nanostructure of the ZrO2 thin film was characterized using high-resolution transmission electron microscopy (HRTEM) observations. The nature of the nanostructured ZrO2 thin film on the Zr of the Zr/ZrO2 electrode plays a vital role in the construction of Zr/ZrO2 chemical sensors, particularly when the electrode is utilized for in situ measurement of the electrochemical parameters of aqueous solutions at high temperatures and pressures. Chemical analyses of the ZrO2 thin films revealed that the Zr/ZrO2 interface is divided into five zones from the outermost zone to the center (1) prismatic and oxygen-rich ZrO2 zone; (2) ZrO2; (3) oxygen-rich Zr (4) oxygen-bearing Zr; and (5) Zr metal. Especially, the outermost oxygen-rich ZrO2 zone of the films is composed of nanometer-sized monoclinic crystals. (C) 2010 Elsevier B.V. All rights reserved.
学科主题	岩矿鉴定与测试
WOS关键词	SUPERCRITICAL AQUEOUS SYSTEMS ; ZIRCONIA PH SENSORS ; IN-SITU MEASUREMENT ; ELECTROCHEMICAL PROPERTIES ; ELEVATED-TEMPERATURES ; VIABILITY ; SURFACE ; OXIDE
WOS研究方向	Chemistry ; Electrochemistry ; Instruments & Instrumentation
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000280916700021
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39149]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Mineral Resources, Lab Geochem Kinet, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Zhang, RH ,Zhang, XT ,Hu, SM . High temperature and pressure chemical sensors based on Zr/ZrO2 electrode prepared by nanostructured ZrO2 film at Zr wire[J]. SENSORS AND ACTUATORS B-CHEMICAL,2010,149(1):143-154.
APA	Zhang, RH ,Zhang, XT ,&Hu, SM .(2010).High temperature and pressure chemical sensors based on Zr/ZrO2 electrode prepared by nanostructured ZrO2 film at Zr wire.SENSORS AND ACTUATORS B-CHEMICAL,149(1),143-154.
MLA	Zhang, RH ,et al."High temperature and pressure chemical sensors based on Zr/ZrO2 electrode prepared by nanostructured ZrO2 film at Zr wire".SENSORS AND ACTUATORS B-CHEMICAL 149.1(2010):143-154.