A Pt-Co3O4-CD electrocatalyst with enhanced electrocatalytic performance and resistance to CO poisoning achieved by carbon dots and Co3O4 for direct methanol fuel cells

作者：Sun, Yue; Zhou, Yunjie; Zhu, Cheng; Hu, Lulu; Han, Mumei; Wang, Aoqi; Huang, Hui^*; Liu, Yang^*; Kang, Zhenhui^*

来源：Nanoscale, 2017, 9(17): 5467-5474.

DOI：10.1039/c7nr01727h

• LOW-TEMPERATURE OXIDATION
• QUANTUM DOTS
• CATALYSTS
• EFFICIENT
• ELECTROOXIDATION
• NANOPARTICLES
• REDUCTION
• EVOLUTION
• PROPERTY
• NANOTUBE

Highly efficient electrocatalysts remain huge challenges in direct methanol fuel cells (DMFCs). Here, a PtCo3O4-CDs/C composite was fabricated as an anode electrocatalyst with low Pt content (12 wt%) by using carbon dots (CDs) and Co3O4 nanoparticles as building blocks. The Pt-Co3O4-CDs/C composite catalyst shows a significantly enhanced electrocatalytic activity (1393.3 mA mg(-1) Pt), durability (over 4000 s) and CO-poisoning tolerance. The superior catalytic activity should be attributed to the synergistic effect of CDs, Pt and Co3O4. Furthermore, the Pt-Co3O4-CDs/C catalyst was integrated into a single cell, which exhibits a maximum power density of 45.6 mW cm(-2), 1.7 times the cell based on the commercial 20 wt% Pt/C catalyst.

• 出版日期2017-5-7
• 单位苏州大学