Carbon-supported platinum group metal catalyst, preparation method therefor and application thereof

A process for producing the carbon-supported platinum group metal catalyst, wherein the catalyst comprises a support and a platinum group metal in an amount of 20% to 70% by weight based on the total weight of the catalyst, the support being a conductive carbon black doped with nitrogen,

• wherein, in a Nitrogen 1s (N1s) X-ray Photoelectron Spectroscopy (XPS) spectrum of the catalyst, a characteristic peak between 399 ev and 400.5 ev is the only peak between 395 ev and 405 ev, or one or more peaks other than the characteristic peak between 399 ev and 400.5 ev accounts for less than 10% of the total peak area between 395 ev and 405 ev, and wherein the N1s XPS is corrected using the elemental carbon peak at 284.3 eV,
• the process comprising the steps of:
• (1) a step of immersion of a nitrogen source:
• mixing a carbon material and an aqueous solution containing a nitrogen source, and immersing, to obtain a nitrogen source-immersed carbon material;
• (2) a step of producing a nitrogen doped carbon material:
• heating the nitrogen source-immersed carbon material obtained in the step (1) to 1000° C.-1500° C. in an inert gas at a temperature-rising rate of 8° C./min-15° C./min, followed by a thermostatic treatment for 0.5h-10 h, to obtain the nitrogen doped carbon material;
• and
• (3) a step of supporting the platinum group metal:
• disposing the platinum group metal on the nitrogen doped carbon material obtained in the step (2),
• wherein the step of supporting the platinum group metal comprises:
• (a) dispersing the nitrogen doped carbon material obtained in the step (2) and a platinum group metal precursor in an aqueous phase to form a mixture, and adjusting the pH value of the mixture to 8-12;
• (b) adding a reducing agent to the mixture for reduction;
• and
• (c) separating a solid from the mixture, and subjecting the solid to post-treatment to obtain the platinum on carbon catalyst, and
• wherein the carbon material is a conductive carbon black.