Investigation of High Catalyteal Durability for Porous Pt Films Deposited via Magnetron Sputtering

【摘要】 Porous Pt thin films were prepared on carbon papers by a single-step ultra-high dc magnetron sputtering method to obtain ideal electrodes for proton exchange membrane fuel cells.The platinum loading of the electrocatalyst layer is controlled at about 0.1 mg·cm^-2.Structural characteristics and catalytic activities of the films were analyzed by scanning electron microscopy,atomic force microscopy,X-ray diffraction,cyclic voltammetry,and stress durability testing methods.The effect of treatment conditions of a substrate on the structural and performance characteristics of the catalytic films was shown as well.Films produced on acid-treated carbon papers at the argon pressure of 0.01 mbar possessed a homogeneous,highly developed surface along with a porous structure.Compared to Pt/TCPW（Toray carbon papers soaked in ultrapure water） electrodes,the film obtained on the acid-treated substrate had a larger electrochemical surface area (163.33 m²·g^-1) and exhibited better catalytic stability and durability due to a porous structure as a result of Pt particle accumulation.更多还原

【Abstract】 Porous Pt thin films were prepared on carbon papers by a single-step ultra-high dc magnetron sputtering method to obtain ideal electrodes for proton exchange membrane fuel cells.The platinum loading of the electrocatalyst layer is controlled at about 0.1 mg·cm^-2.Structural characteristics and catalytic activities of the films were analyzed by scanning electron microscopy,atomic force microscopy,X-ray diffraction,cyclic voltammetry,and stress durability testing methods.The effect of treatment conditions of a substrate on the structural and performance characteristics of the catalytic films was shown as well.Films produced on acid-treated carbon papers at the argon pressure of 0.01 mbar possessed a homogeneous,highly developed surface along with a porous structure.Compared to Pt/TCPW（Toray carbon papers soaked in ultrapure water） electrodes,the film obtained on the acid-treated substrate had a larger electrochemical surface area (163.33 m²·g^-1) and exhibited better catalytic stability and durability due to a porous structure as a result of Pt particle accumulation.更多还原