Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 7, Issue 12, Pages 4095-4103Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ee02531h
Keywords
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Funding
- National Basic Research Program of China [2010CB934700, 2013CB933900, 2014CB931800]
- National Natural Science Foundation of China [21271005, 21431006, 91022032, 91227103]
- Chinese Academy of Sciences [KJZD-EW-M01-1]
- Project of Science and Technology Head Introduction of Anhui University [02303203-0054]
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Catalysts for oxygen reduction reaction (ORR) are crucial in fuel cells. Developing metal-free catalyst with high activity at low-cost and high-volume production remains a great challenge. Here, we report a novel type of nitrogen-doped nanoporous carbon nanosheets derived from a conveniently available and accessible plant, Typha orientalis. The nanosheets have high surface area (the highest surface area can be 898 m(2) g(-1)), abundant micropores and high content of nitrogen (highest content of 9.1 at.%). The typical product exhibits an unexpected, surprisingly high ORR activity. In alkaline media, it exhibits similar catalytic activity but superior tolerance to methanol as compared to commercial 20% Pt/C. In acidic media as well, it shows excellent catalytic ability, stability and tolerance to methanol. This low-cost, simple and readily scalable approach provides a straightforward route to synthesize excellent electrocatalysts directly from biomass, which may find broad applications in the fields of supercapacitors, sensors, and gas uptake.
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