Platinum electrode for high-temperature high-pressure hydrothermal system and preparation method thereof

Abstract

The invention discloses a platinum electrode for a high-temperature high-pressure hydrothermal system and a preparation method of the platinum electrode. The platinum electrode is composed of a substrate (6), a circular truncated cone shaped high-temperature insulating mat (5), a high-temperature insulating taper sleeve (4), a circular truncated cone shaped high-temperature insulating ceramic (2), an inert metal sheet (1), a spongy inert metal layer (3) and an electrode lead wire (7), wherein one end of the substrate is provided with a taper hole and the other end of the substrate is provided with an axis through hole; the convergent end of the taper hole is provided with the circular truncated cone shaped high-temperature insulating mat, the divergent end of the taper hole is provided with the high-temperature insulating taper sleeve and the circular truncated cone shaped high-temperature insulating ceramic, the electrode lead wire and the spongy inert metal layer are arranged on the axis and the large circular surface of the circular truncated cone shaped high-temperature insulating ceramic, and the inert metal sheet is arranged between the circular truncated cone shaped high-temperature insulating mat and the circular truncated cone shaped high-temperature insulating ceramic. Compared with the existing various high-pressure hydrothermal platinum electrodes, the platinum electrode solves the difficult problems that the existing cold-sealing type platinum electrode at home and abroad has poor stability and reliability and the hot-sealing type platinum electrode cannot be used in a high-pressure hydrothermal environment at higher than 400 DEG C.

Description

technical field [0001] The invention relates to a platinum electrode for electrochemical measurement and electrochemical sensor of a high-temperature and high-pressure hydrothermal system and a preparation method thereof, belonging to the technical field of electrochemical measurement. Background technique [0002] Whether in scientific experiments, field detection or industrial processes, people often need to perform various electrochemical measurements on high-temperature and high-pressure hydrothermal systems and use various electrochemical sensors in such systems. Platinum electrode is the most widely used electrode in high temperature and high pressure hydrothermal system electrochemical in situ measurement and electrochemical sensor, it is often used as working electrode, auxiliary electrode or reference electrode in electrochemical measurement system or electrochemical sensor . However, in a high-temperature, high-pressure hydrothermal environment, how to ensure the ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a platinum electrode for a hydrothermal system with a wide temperature and pressure range (room temperature - 700°C, normal pressure - 100 MPa) to solve the poor stability of the existing cold-sealed platinum electrode , Reliability has been questioned, and the heat-sealed platinum electrode cannot be used in a high-temperature, high-pressure hydrothermal environment higher than 400°C.

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