Nitrogen and Phosphorus Co‐doped Hollow Carbon Spheres as Efficient Metal‐Free Electrocatalysts for the Oxygen Reduction Reaction,ChemElectroChem

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Nitrogen and Phosphorus Co‐doped Hollow Carbon Spheres as Efficient Metal‐Free Electrocatalysts for the Oxygen Reduction Reaction
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-03-07 , DOI: 10.1002/celc.201800045
Chunmei Zhang _{1,

2} , Lin Hou _{1,

3} , Chunfeng Cheng _{1,

2} , Zhihua Zhuang _{1,

2} , Fuqin Zheng _{1,

2} , Wei Chen ₁

Affiliation

Replacement of rare‐ and noble‐metal catalysts with earth‐abundant, low‐cost, stable, and efficient metal‐free catalyst substitutes is highly desirable, but full of challenges for the oxygen reduction reaction (ORR). Herein, N, P co‐doped hollow carbon spheres (N,P‐HCS) are prepared through a simple pyrolysis method, using hollow carbon spheres (HCS), melamine, and phytic acid (PA) as the C, N, and P sources, respectively. Compared to the N‐doped HCS (N‐HCS) and P‐doped HCS (P‐HCS), the N, P co‐doped sample exhibited much higher ORR catalytic activity. Moreover, in comparison with commercial Pt/C, the as‐prepared N,P‐HCS showed comparable ORR activity, but stronger endurance to methanol and higher durability in alkaline solution. The high performance of N,P‐HCS can be primarily ascribed to the large surface area, high conductivity, porous carbon structure, and high content of heteroatoms (N and P). Considering the excellent catalytic activity and durability, after further structural optimization, N,P‐HCS could be a promising metal‐free catalyst candidate for the ORR in fuel cells.

中文翻译：

氮和磷共掺杂空心碳球作为氧还原反应的高效无金属电催化剂

迫切需要用富含地球，低成本，稳定和有效的无金属催化剂替代物来替代稀有和贵金属催化剂，但氧还原反应（ORR）充满了挑战。在此，通过简单的热解方法，使用空心碳球（HCS），三聚氰胺和植酸（PA）作为C，N和P，制备了N，P共掺杂的空心碳球（N，P-HCS）。来源。与N掺杂的HCS（N-HCS）和P掺杂的HCS（P-HCS）相比，N，P共掺杂的样品表现出更高的ORR催化活性。此外，与商业化的Pt / C相比，制得的N，P-HCS表现出可比的ORR活性，但对甲醇的耐受性更强，在碱性溶液中的耐久性更高。N，P-HCS的高性能主要归因于大表面积，高电导率，多孔的碳结构，以及高含量的杂原子（N和P）。考虑到出色的催化活性和耐久性，经过进一步的结构优化后，N，P-HCS可以成为燃料电池ORR的有前途的无金属催化剂。

更新日期：2018-03-07

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