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Improved oxygen reduction activity of carbon nanotubes and graphene through adenine functionalization

机译：通过腺嘌呤官能化改善碳纳米管和石墨烯的氧还原活性

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Here we demonstrated a simple and straightforward way which can significantly improve the ORR activity of single walled carbon nanotubes (SWNTs) and graphene through adenine functionalization. Adenine can interact with CNTs and graphene's carbon planes, which draw electrons from adenine to make the N species form pyrrolic and graphitic-N, similar to N species of N doped materials. The activity for the ORR at a potential of ?0.25 V vs. SCE was improved by 4.5 and 1.8 times, and the half-wave potential was around ?0.25 V and 0.22 V vs. SCE for adenine functionalized SWNTs and graphene, which is 120 and 90 mV lower than Pt–C, respectively. Even though the activity and onset potential is smaller than that of commercial Pt–C, the results provide a simple and straightforward way to improve the activity of carbon materials through molecular functionalization in exploring C-based metal free electrocatalysts for ORR with better fuel selectivity, better CO tolerance and stability.
机译：在这里，我们展示了一种简单直接的方法，该方法可以通过腺嘌呤官能化显着提高单壁碳纳米管（SWNT）和石墨烯的ORR活性。腺嘌呤可以与CNT和石墨烯的碳平面相互作用，后者从腺嘌呤中吸收电子，使N物质形成吡咯和石墨N，类似于N掺杂材料中的N物质。 SCE电位为0.25 V vs。时，ORR的活性提高了4.5和1.8倍，半波电位约为0.25 V和0.22 V vs. < / em>腺嘌呤官能化的SWNT和石墨烯的SCE，分别比Pt–C低120和90 mV。即使其活性和起始电位比商业Pt–C的活性和起始电位要小，结果仍提供了一种简单而直接的方法，可以通过分子功能化来探索碳基无金属ORR的金属基电催化剂，以提高燃料的选择性，从而提高碳材料的活性，更好的CO耐受性和稳定性。

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