An integrated platinum-nanocarbon electrocatalyst for efficient oxygen reduction

作者：Huang, Lei; Wei, Min; Qi, Ruijuan; Dong, Chung-Li; Dang, Dai; Yang, Cheng-Chieh; Xia, Chenfeng; Chen, Chao; Zaman, Shahid; Li, Fu-Min; You, Bo; Xia, Bao Yu^*

来源：Nature Communications, 2022, 13(1): 6703.

DOI：10.1038/s41467-022-34444-w

• MEMBRANE FUEL-CELLS
• PERFORMANCE
• CATALYSTS
• DURABILITY
• CHALLENGES
• SURFACE
• DESIGN
• ALLOY
• KEY

Improving fuel cell technologies based on Pt-based alloys is important for efficient fuel cells. Here, the authors report a hybrid PtCo alloy electrocatalyst for acidic oxygen reduction at high current densities and H-2/air fuel cell power densities. @@@ Efficient and robust platinum-carbon electrocatalysts are of great significance for the long-term service of high-performance fuel cells. Here, we report a Pt alloy integrated in a cobalt-nitrogen-nanocarbon matrix by a multiscale design principle for efficient oxygen reduction reaction. This Pt integrated catalyst demonstrates an increased mass activity, 11.7 times higher than that of commercial Pt catalyst, and retains a stability of 98.7% after 30,000 potential cycles. Additionally, this integrated catalyst delivers a current density of 1.50 A cm(-2) at 0.6 V in the hydrogen-air fuel cell and achieves a power density of 980 mW cm(-2). Comprehensive investigations demonstrate that the synergistic contribution of components and structure in the platinum-carbon integrated catalyst is responsible for the high-efficiency ORR in fuel cells.

• 单位
  华中科技大学; 广东工业大学; 武汉大学