电催化剂
材料科学
碳纤维
甲醇
质子交换膜燃料电池
氮气
催化作用
金属
氧气
兴奋剂
氧还原反应
化学工程
吡啶
无机化学
燃料电池
电极
电化学
化学
物理化学
有机化学
复合材料
冶金
光电子学
工程类
复合数
作者
Qing Lv,Wenyan Si,Ze Yang,Ning Wang,Zeyi Tu,Yuanping Yi,Changshui Huang,Jiang Li,Mingjia Zhang,Jim He,Yun Long
标识
DOI:10.1021/acsami.7b08115
摘要
Metal-free catalysts for oxygen reduction reaction (ORR) are the desired materials for low-cost proton exchange membrane fuel cells. Graphdiyne (GDY), a novel type of two-dimensional carbon allotrope, is featured by its sp- and sp2-hybridized carbon atoms, different from the other existing carbon materials. Thus, nitrogen (N) can be doped in new styles by substituting sp-hybridized carbon atoms, effective for ORR, which has been displayed in this study using both experimental and theoretical technologies. The N-doped GDY was synthesized with pyridine and NH3 as N sources successively, expressing an electrocatalytic activity at a potential above 0.8 V similar to that of commercial Pt/C for ORR in alkaline solution and higher stability and better methanol tolerance than those of Pt/C.
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