ACS Applied Materials & Interfaces
ACS Applied Materials & Interfaces
5 years ago

Nitrogen-Doped Porous Graphdiyne: A Highly Efficient Metal-Free Electrocatalyst for Oxygen Reduction Reaction

Nitrogen-Doped Porous Graphdiyne: A Highly Efficient Metal-Free Electrocatalyst for Oxygen Reduction Reaction
Yuanping Yi, Zeyi Tu, Ning Wang, Ze Yang, Wenyan Si, Li Jiang, Yunze Long, Changshui Huang, Qing Lv, Jianjiang He, Mingjia Zhang
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.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b08115

DOI: 10.1021/acsami.7b08115

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