Nano-palladium And Its Alloys Used In The Catalytic Oxidation Of Formic Acid Anode

As a kind of green, efficient energy conversion device, low-temperature fuel cellis widespread attention by people in recent years. However, low efficiency and highcost of precious metal catalyst, which restricts the development of fuel cell andcommercial applications. Therefore, how to lower the dosage of noble metals, andimprove the catalytic efficiency of precious metal, has extremely important practicalapplication value.Based on the above consideration, we could develop a series of very effectivesynthetic strategy by using simple redox reaction and substitution reaction amongmetal. First, we can effectively control the migration direction of precious metals byusing the method of combining the reduction reaction and substitution reaction,through the structure of the surfactant guiding. Synthesized uniform size and nano ballwith a hollow structure of Pd (Pd NS). Making the Pd NS load on the surface ofgraphene, in an electrochemical study, hollow structure of Pd/graphene showedexcellent electrochemical performance and high stability. In a word, the synthesis ofhollow structure of the precious metal has a good application prospect in the fuel cell.And then, on the basis of the synthesis of hollow structure, we process furtherresearch on the action time of adding Pd2+, and two mole ratios of metal Pd and Co.Successfully created the Pd nano ball with hollow and porous structure. Synthesis ofPd NS-HP load on the surface of graphene, possesses the advantages of high dispersion,high stability. Because of its structure, hollow long-short make formate fuel can bebetter to the interior of the shell, improving its electrochemical specific surface area,and increasing the utilization rate of its active site, opening up a new way for directformic acid fuel cell application in the business. Through the simple oxidation-reduction method and the reducing action ofGraphene against Pd2+, we synthesized GO-PdAg. GO-PdAg has the advantages ofgood dispersion and strong force for graphene anchorage. The main advantage of thisapproach is not to add any of the reducing agent and surfactant. Because the parcelwithout surfactant, so alloy nanoparticles will reveal more active site, and play it’s informic acid catalytic effect better. Owning to the method is simple, green, cheap, andhas a highly efficient catalyst performance, therefore, these benefits would promote thecommercial application of direct formic acid fuel cells.