Method for preparing iridium/iridium oxide pH electrode through supercritical treatment

The invention discloses a method for preparing an iridium/iridium oxide pH electrode through supercritical treatment. The method comprises the following steps: preparing the iridium/iridium oxide pH electrode through thermal oxidation, and treating for 3-5 hours in a supercritical environment of 300-400 DEG C and 30-40 MPa. The electrode subjected to supercritical treatment has the advantages of high sensitivity, fast response, good reproducibility, low hysteresis quality, high stability and the like. The problems of long hydration time, low efficiency, poor stability, demolding and the like of the iridium/iridium oxide pH electrode for a long time are effectively solved. The electrode improved by the method can be well applied under the condition of normal temperature, and the stability of the electrode can also be kept under the conditions of high temperature such as supercritical conditions and hot liquid ports. 本发明公开了一种超临界处理制备铱/氧化铱pH电极的方法，该方法通过热氧化制备铱/氧化铱pH电极，并在300℃~400℃、30~40MPa的超临界环境下处理3~5小时。经过超临界处理后的电极具