2results about How to "Reduce Galvanic Corrosion" patented technology

The application relates to a preparation method of an entropy-based oxide catalyst with high metallic property and application of the entropy-based oxide catalyst in hydrogen production by acidic electrolytic water, and belongs to the field of catalysis. A water-soluble salt containing at least Ru, Ir and A is uniformly mixed, hydrolyzed and reduced under water bath stirring condition by taking zinc oxide as a carrier and a sodium borohydride solution as a reducing agent, then the black powder of the medium-entropy alloy is formed through filtration, washing and drying, and finally the black powder is subjected to rapid incomplete oxidation under the condition of 300-500 DEG C and air atmosphere, and then is subjected to acid pickling, filtration, washing and drying to prepare the entropy-based oxide catalyst with high metallic property. The catalyst contains a large amount of Ir-Ir metal bonds and / or Ir-Ru metal bonds, and the proportion can reach 30%-40%. The mismatch between the metal atom fingerprint structure and the metal-oxygen atom coordination structure causes serious lattice distortion, induces unbalanced distribution of stress and strain, and promotes the kinetics of the acidic oxygen evolution reaction.

This utility model provides a double-wing stationary contact assembly for a switch machine, relating to the field of switch machine technology. The double-wing stationary contact assembly includes: a base with at least two slots; and a contact assembly disposed at the slots. The contact assembly includes a contact piece and a contact post connected together. The contact piece includes a first contact piece and a second contact piece, with the second contact piece disposed outside the first contact piece. The first contact piece includes an arc segment and a first connecting segment. The second contact piece includes a bent segment and a second connecting segment, with the arc segment disposed within the bent segment. The first connecting segment and the second connecting segment are stacked. This stationary contact assembly solves the problems of low reliability, easy arc erosion, and poor self-cleaning ability of existing stationary contact assemblies due to single-wing contact.