Template-free synthesis of three-dimensional nanoporous N-doped graphene for high performance fuel cell oxygen reduction reaction in alkaline media

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DOIResolve DOI: http://doi.org/10.1016/j.apenergy.2016.04.074
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TypeArticle
Journal titleApplied Energy
ISSN0306-2619
Volume175
Pages405413
SubjectNitrogen-doped nanoporous graphene; Oxygen reduction reaction; Fuel cell; Metal–air-battery
AbstractThree-dimensional nanoporous nitrogen-doped graphene (3D-PNG) has been synthesized through a facial one-step synthesis method without additional silica template. The as-prepared 3D-PNGwas used as an electrocatalyst for the oxygen reduction reaction (ORR), which shows excellent electrochemistry performance, demonstrated by half-cell electrochemical evaluation in 0.1 M KOH including prominent ORR activity, four electron-selectivity and remarkable methanol poisoning stability compared to commercial 20%Pt/C catalyst. The physical and surface properties of 3D-PNG catalyst were characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and BET surface area analysis. The experiments show that 3D-PNG catalyst possesses super-large specific surface area reaching 920 m²g⁻¹, which is superior to our most recently reported 3D-PNG synthesized by silica template (670 m²g⁻¹) and other doped graphene catalysts in literature. When used for constructing a zinc–air battery cathode, such an 3D-PNG catalyst can give a discharge peak power density of 275 mW cm⁻². All the results announce a unique procedure to product high-efficiency graphene-based non-noble metal catalyst materials for electrochemical energy devices including both fuel cells and metal–air batteries.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
IdentifierS0306261916305359
NPARC number23000252
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Record identifier23b04e7f-828c-4ab4-9904-b26dc2cfebc2
Record created2016-06-28
Record modified2016-06-28
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