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对氧气还原(ORR)和氧气析出(OER)反应都具有催化活性的双功能催化剂在金属-空气电池中起着关键作用.本文通过溶剂热反应,一步原位合成了磷掺杂碳纳米管(P-CNT).旋转环盘电极测试表明磷掺杂能够明显提高碳纳米管的催化活性,P-CNT在碱性电解质中对ORR和OER都具有优异的催化活性.P-CNT对ORR的催化还原为近4电子反应,可与商业催化剂Pt/C(20 wt%)相比;而其对OER的催化活性则高于Pt/C(20 wt%).此外,P-CNT的长期稳定性优于Pt/C(20 wt%).P-CNT对ORR和OER的高催化活性和稳定性主要归因于磷对碳的掺杂以及磷与碳间强的化学键合.
Bi-functional catalysts with catalytic activity for both oxygen reduction (ORR) and oxygen evolution (OER) reactions play a key role in metal-air batteries.In this paper, one-step synthesis of phosphorus-doped carbon nanotubes P-CNTs.) Rotating ring disk electrode test showed that phosphorus doping can significantly improve the catalytic activity of CNTs, P-CNT has excellent catalytic activity on both ORR and OER in alkaline electrolyte.P-CNT catalytic ORR Compared with the commercial catalyst Pt / C (20 wt%), and its catalytic activity to OER is higher than Pt / C (20 wt%). In addition, the long-term stability of P-CNT Is superior to that of Pt / C (20 wt%). The high catalytic activity and stability of ORP and CNTs to ORR and OER are mainly attributed to the doping of carbon by phosphorus and the strong chemical bonding between phosphorus and carbon.