Cathode catalyst for proton membrane fuel cell

Abstract

The invention discloses a cathode catalyst of proton film fuel battery in the electrochemical technique domain, which is characterized by the following: each composition and weight percentage is 1-50 percent Pt, 20-80 percent Zr1-xMxO2 and 10-50 C, wherein the x is mole rate between 0.1 and 0.5; the catalyst making method comprises the following steps: adapts soft chemical method to synthesize nanometer-level Zr1-xMxO2; mixing the nanometer-level Zr1-xMxO2 with nanometer-level Pt / C at mole rate of Pt:M=1:1-5. The invention reduces the electrochemical polarization, Ohm polarization and mass tr ansfer polarization effectively, which increases the catalytic efficiency to improve the battery property.

Description

technical field

[0001] The invention relates to a material in the technical field of electrochemistry, in particular to a proton membrane fuel cell cathode catalyst. Background technique

[0002] Most of the current proton membrane fuel cell cathode catalysts use different percentages of carbon-supported platinum (Pt / C), the weight percentage of Pt is generally between 10-60%, and the amount of platinum is generally 0.4mg / cm 2 about. In order to promote the practical process of proton membrane fuel cells as soon as possible, the currently proposed cathode catalyst research goal is: the platinum loading is a quarter of the current one, while the performance of the battery does not decline. That is to say, the current platinum load must be reduced from 0.4mg / cm2 to 0.1mg / cm2.

[0003] Found through literature retrieval to prior art, U.S. Patent No. 5876867, patent name is (Platinumskeleton alloy-supported electrocatalyst, electrode using the electrocatalyst, and process for ...