1] State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun 130022, P.R. China [2] Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun 130022, P.R. China [3] Graduate University of Chinese Academy of Science, Beijing, 100049, China.
Sci Rep. 2013;3:2505. doi: 10.1038/srep02505.
For the goal of practical industrial development of fuel cells, cheap, sustainable and high performance electrocatalysts for oxygen reduction reactions (ORR) which rival those based on platinum (Pt) and other rare materials are highly desirable. In this work, we report a class of cheap and high-performance metal-free oxygen reduction electrocatalysts obtained by co-doping carbon blacks with nitrogen and fluorine (CB-NF).The CB-NF electrocatalysts are highly active and exhibit long-term operation stability and tolerance to poisons during oxygen reduction process in alkaline medium. The alkaline direct methanol fuel cell with the best CB-NF as cathode (3 mg/cm(2)) outperforms the one with commercial platinum-based cathode (3 mg Pt/cm(2)). To the best of our knowledge, these are among the most efficient non-Pt based electrocatalysts. Since carbon blacks are 10,000 times cheaper than Pt, these CB-NF electrocatalysts possess the best price/performance ratio for ORR, and are the most promising alternatives to Pt-based ones to date.
对于燃料电池的实际工业发展目标而言，人们希望能够获得廉价、可持续且性能高的、可媲美基于铂（Pt）和其他稀有材料的氧还原反应（ORR）电催化剂。在这项工作中，我们报告了一类通过氮和氟共掺杂碳黑（CB-NF）得到的廉价、高性能的无金属氧还原电催化剂。CB-NF 电催化剂在碱性介质中的氧还原过程中具有高活性和长期运行稳定性，并且对毒物具有耐受性。以最佳 CB-NF 作为阴极（3 mg/cm(2)）的碱性直接甲醇燃料电池的性能优于以商业铂基阴极（3 mg Pt/cm(2)）的燃料电池。据我们所知，这些是效率最高的非 Pt 基电催化剂之一。由于碳黑比 Pt 便宜 10000 倍，因此这些 CB-NF 电催化剂具有最佳的 ORR 性价比，是迄今为止最有前途的 Pt 基替代品。
