The Development And Application Of Nanoporous Core-Shell Structure Fuel Cell Anode Catalyst

With the depletion of traditional energy sources,fuel cells are favored by many researchers due to their high energy density and zero pollution.Although fuel cells have nearly 200 years,the slow anode kinetics and the high catalytic material limitations remain the biggest challenge for commercialization.In this paper,with three-dimensional bicontinuous nano-porous gold as the carrier,so as to fabricate highly active Pt-based alloy nanoparticles while improving the anode kinetics of methanol fuel cell and increase methanol formic acid catalytic activity.For methanol catalysis,PtRu catalyst has always been considered as the best material for methanol catalysis.In this paper,NPG-PtRu nanoparticles were prepared by electrodeposition and characterized by TEM,HR-TEM and other means.The mechanism action of NPG carrier and Ru in this catalyst was explored by cyclic voltammetry,linear voltammetry and CO anti-poisoning test.The Pt/Ru ratio in NPG-PtRu catalyst(16:1,2:1,1:1,1:1.8).Afterwards,we optimized the catalyst Pt4Ru4 for different loadings(5cycles,10cycles,20cycles,30cycles).Finally,we chose NPG-Pt4Ru4 at20cycles for electronic load for power performance testing in an actual direct methanol fuel cell unit.The assembled cell exhibited a maximum output of 96 mW/cm~2 at 80°C on a methanol fuel cell with excellent catalytic performance and application prospects.Secondly,taking formic acid as the research object,NPG supported PtPb nanoparticle film catalyst was prepared by underpotential deposition with lead perchlorate as lead source and potassium chlorite as Pt source.Cyclic voltammetry study of the electrocatalytic properties of formic acid and anti-poisoning ability.It was found that the order of Pt/Pb deposition on the NPG substrate was changed and the NPG-Pt-Pb and NPG-Pb-Pt catalysts were prepared respectively.The initial potentials of formic acid were obviously decreased,increasing the oxidation current density and enhancing poisoning performance significantly better than JM-Pt/C(20%).