Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 25, Issue 11, Pages 2877-2883Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201806201
Keywords
B, N co-doping; carbon aerogels; metal-free catalysts; oxygen reduction reaction; porous structures
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Funding
- National Nature Science Foundation of China [21671001, 21571002]
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials
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Herein, an ordinary and mass-production approach is reported to synthesize boron (B) and nitrogen (N) co-doped three-dimensional (3D) carbon aerogels (CA) by using glucose and borax as the raw materials by a simple hydrothermal method and then carbonization in NH3 atmosphere. The porous material (BN-CA-900) possesses a large specific surface area (1032 m(2) g(-1)) and high contents of doped pyridinic N and graphitic N. The onset potential (0.91 V vs. reversible hydrogen electrode, RHE), half-wave potential (0.77 V vs. RHE), and current density (5.70 mA cm(-2) at 0.2 V vs. RHE) of BN-CA-900 for ORR are similar to those of commercial Pt/C, indicating that BN-CA-900 has a comparable catalytic activity with Pt/C in alkaline media. The number of electron transfer is 3.86-3.99 and the yield of hydrogen peroxide is less than 6.8 %. BN-CA-900 also presents decent catalytic performance in acidic medium. Moreover, the stability and methanol tolerance of BN-CA-900 are superior to commercial Pt/C in both alkaline and acidic media. The prepared BN-CA-900 is a promising candidate that may be applied in other areas, such as the adsorption of pollution, porous conductive electrodes, and lithium-ion batteries.
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