Preparation of mixed oxide supported Pt catalysts for CO tolerance in Hydrogen Oxidation Reaction

• Main Authors: Yi-Jhen Peng, 彭怡貞
• Other Authors: Shawn D. Lin
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/70467915766833858483

碩士 === 國立臺灣科技大學 === 化學工程系 === 104 === Proton exchange membrane fuel cells (PEMFCs) are expected to have enormous power for both mobile and stationary applications (e.g., automotive, portable, electronics, etc.). Carbon supports are mainly used in electrocatalysts for fuel cells because of good electron conductivity and high surface area that may leads to good dispersion of active Pt particles. However, carbon corrosion under operating conditions of PEMFCs becomes a concern which can cause deterioration in the performance of Pt catalysts. To enhance durability and CO tolerance of anodic catalysts, mixed-oxide supports are examined in this study. A simple hydrothermal process is applied to synthesize supports and the influences of preparation parameters are examined, including pretreatment conditions, dual ion-doping, sequences of Ru inclusion, and changes of M in M0.7Ru0.3O2. Pt loading is prepared by EG method. XRD results show that the prepared 40% Pt/P-Ti0.3Ru0.7O2 contains Pt particle size of 3-4 nm, similar with commercial PtRu/C catalysts. CO stripping and hydrogen oxidation reaction (HOR) under H2 with 100 and 250 pm CO are examined. The results indicate that 40Pt/P-Ti0.7Ru0.3O2-b12 and 40Pt/W0.7Ru0.3O2 catalysts exhibit improved CO tolerance, intrinsic activity and durability comparing to commercial PtRu/C and homemade 40% Pt/Ti0.7Ru0.3O2 catalysts.