Ti基Ru-Ir-Ti电极在稀氯化钠溶液中的电解失效行为

doi:10.11896/cldb.22110104

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Abstract Titanium electrode has been regarded as a promising material with wide applications in chlor alkali industry, drinking water disinfection, circulating cooling water treatment owing to its unique properties, such as high catalytic activity, high durability, easy processing, etc. However, the invalidation mechanism is mostly carried out in sulfuric acid solution, which can not really reflect the actual situation of the electrode working in sodium chloride environment. In view of this, electrochemical and surface physical methods were used to study the accelerated electrolysis process of Ru-Ir-Ti electrode in dilute sodium chloride solution. The results of different stages of accelerated electrolysis show that the invalidation of the electrode is a gradual process, and the dissolution rate of ruthenium on the surface of the coating is faster in the early stage of electrolysis, and then the electrode is uniformly corroded, and the active materials Ru and Ir are gradually reduced. The electrolytic consumption of the coating on the surface and inside leads to loose coating and structural damage, when the active substance decreases to the critical point, the electrocatalytic active substance with conductivity is missing, the reaction proceeds slowly, and the cell voltage rises, which is the main reason for electrode invalidation, and the passivation phenomenon of the electrode substrate has not been found in the research process. At the same time, studies have shown that sodium hypochlorite produced by electrolysis will not affect the performance of the electrode.

Key words： titanium electrode sodium chloride solution invalidation mechanism gradually reduced electrode invalidation sodium hypochlorite

Published: 10 July 2024 Online: 2024-08-01

CLC number:

TQ151

Fund:Key Research and Development Plan of Shaanxi Province (2017ZDXM-GY-041).

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	Articles by authors
	YANG Ruifeng
	JIA Bo
	GUO Min
	WU Chenhang
	LI Jinyue
	HAO Xiaojun
	FENG Qing

Cite this article:

YANG Ruifeng,JIA Bo,GUO Min, et al. Electrolytic Invalidation Behavior of Ti Based Ru-Ir-Ti Electrode in Dilute Sodium Chloride Solution[J]. Materials Reports, 2024, 38(13): 22110104-5.

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http://www.mater-rep.com/EN/10.11896/cldb.22110104 OR http://www.mater-rep.com/EN/Y2024/V38/I13/22110104

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