Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 35, Pages 29744-29752Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b08115
Keywords
graphdiyne; sp hybridization; oxygen reduction reaction; nitrogen doping; metal-free catalyst
Funding
- National Natural Science Foundation of China [21790050, 21790051, 21771187, 21603250]
- Hundred Talents Program and Frontier Science Research Project of the Chinese Academy of Sciences [QYZDB-SSW-JSC052]
- Natural Science Foundation of Shandong Province (China) for Distinguished Young Scholars [JQ201610]
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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 sp(2)-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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