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A Defect‐rich N, P Co‐doped Carbon Foam as Efficient Electrocatalyst toward Oxygen Reduction Reaction
ChemCatChem ( IF 4.5 ) Pub Date : 2020-05-08 , DOI: 10.1002/cctc.202000363
Maomao Yang 1 , Xinxin Shu 1 , Jintao Zhang 1
Affiliation  

Explore cost‐effective and efficient carbon‐based electrocatalysts toward oxygen reduction reaction is highly desired to replace high‐cost platinum group metal (PGM) catalysts. Herein we synthesized a N, P co‐doped carbon foam by direct blowing of glucose in the presence of phytic acid (blowing catalyst) and urea (self‐sacrificing template). This template‐free one‐step approach achieved high surface heteroatom content of N (5 at.%) and P (2.33 at.%), large surface area (1026 m2 g−1) and high ID/IG ratio. It was found that the edges‐rich activated carbon scaffold as well as the active N‐sites work synthetically to guarantee its efficient ORR performance with the half‐wave potential of 0.84 VRHE. Besides, the well‐balanced porous structure facilitates its practical application as an air cathode in zinc‐air cell, reaching power density of 145 mW cm−2 at the current density of 169 mA cm−2.

中文翻译:

富缺陷的氮,磷共掺杂碳泡沫作为一种高效的氧还原反应电催化剂

迫切需要探索经济高效的碳基电催化剂,以进行氧还原反应,以取代高成本的铂族金属(PGM)催化剂。本文中,我们通过在植酸(吹气催化剂)和尿素(自牺牲模板)的存在下直接吹送葡萄糖来合成N,P共掺杂的碳泡沫。这种无需模板的一步方法可实现N(5 at。%)和P(2.33 at。%)的高表面杂原子含量,大表面积(1026 m 2  g -1)和高I D / I G比。研究发现,边缘富集的活性炭支架和活性N位点可综合发挥作用,以确保其有效的ORR性能(半波电势为0.84 V RHE)。此外,良好平衡的多孔结构有利于其在锌空气电池中作为空气阴极的实际应用,在电流密度为169 mA cm -2时达到145 mW cm -2的功率密度。
更新日期:2020-05-08
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