A Ti-coated nano-SiC supported platinum electrocatalyst for improved activity and durability in direct methanol fuel cells

作者：Zhang, Yan; Zang, Jianbing; Dong, Liang; Cheng, Xiaozhe; Zhao, Yuling; Wang, Yanhui^*

来源：Journal of Materials Chemistry A, 2014, 2(26): 10146-10153.

DOI：10.1039/c4ta00618f

• CATALYST SUPPORT
• CARBON NANOTUBES
• ORR ACTIVITY
• OXIDATION
• PERFORMANCE
• DEGRADATION
• ELECTRODE
• CATHODE
• ELECTROOXIDATION
• NANOCRYSTALS

Nano-silicon carbide (nano-SiC) particles modified with a titanium (Ti) coating were used as a novel support for the platinum (Pt) electrocatalyst in direct methanol fuel cells. Ti-coated nano-SiC (Ti/SiC) powder was prepared by a one-pot deposition method under vacuum and a coating was formed on the nano-SiC surface. The Ti coating was strongly bonded with nano-SiC with the help of TiC and Ti5Si3. The Ti/SIC supported Pt electrocatalyst (Pt-Ti/SiC) was fabricated using a microwave-assisted reduction method. The electrocatalytic performances of the Pt-Ti/SiC for the methanol oxidation and oxygen reduction reactions were much higher than the Pt supported on the pristine nano-SiC. The electrochemical stability of the Pt-Ti/SiC was more outstanding compared with the Pt supported on Vulcan XC-72 carbon black. The superior electrocatalytic performance of the Pt-Ti/SiC can be ascribed to the anchoring effect of the Ti coating on Pt nanoparticles and the high stability of the nano-SiC support.

• 出版日期2014-7-14
• 单位燕山大学; 亚稳材料制备技术与科学国家重点实验室