Electrochemical catalyst electrode to increase bonding durability between covering layers and a metal substrate

摘要

An electrochemical catalyst electrode to increase bonding durability between covering layers and a metal substrate is made by processing a metal substrate at a high temperature and etching the metal substrate to form a large number of etching pores on granular surfaces; heating the metal substrate to transform the surface thereof to an oxygen interstitial layer; laminating an inner covering layer which is compatible to the oxygen interstitial layer on the metal substrate and deeply planted into the pores to form included angles to increase adhering force between the inner covering layer and the substrate and to reduce peeling on the interface; and forming an outer covering layer on the layers with stabilizing additive added in the outer covering layer to enhance the stability of the outer surface of the covering layers thereby to reduce dissolution of noble metal; and greatly increase stability and durability of the electrode.