Journal ArticleDOI
Well-dispersed high-loading pt nanoparticles supported by shell-core nanostructured carbon for methanol electrooxidation.
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TLDR
N-doped carbon layers present many advantages over nondoped ones and would emerge as an interesting supporting carbon material for fuel cell electrocatalysts and to enhance the CO tolerance of Pt catalysts.Abstract:
Shell−core nanostructured carbon materials with a nitrogen-doped graphitic layer as a shell and pristine carbon black particle as a core were synthesized by carbonizing the hybrid materials containing in situ polymerized aniline onto carbon black. In an N-doped carbon layer, the nitrogen atoms substitute carbon atoms at the edge and interior of the graphene structure to form pyridinic N and quaternary N structures, respectively. As a result, the carbon structure becomes more compact, showing curvatures and disorder in the graphene stacking. In comparison with nondoped carbon, the N-doped one was proved to be a suitable supporting material to synthesize high-loading Pt catalysts (up to 60 wt %) with a more uniform size distribution and stronger metal−support interactions due to its high electrochemically accessible surface area, richness of disorder and defects, and high electron density. Moreover, the more rapid charge-transfer rates over the N-doped carbon material are evidenced by the high crystallinity...read more
Citations
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High-Performance Electrocatalysts for Oxygen Reduction Derived from Polyaniline, Iron, and Cobalt
TL;DR: A family of non–precious metal catalysts that approach the performance of platinum-based systems at a cost sustainable for high-power fuel cell applications, possibly including automotive power.
Journal Article
High-Performance Electrocatalysts for Oxygen Reduction Derived from Polyaniline, Iron, and Cobalt
TL;DR: In this article, a family of non-precious metal catalysts that approach the performance of platinum-based systems at a cost sustainable for high-power fuel cell applications, possibly including automotive power.
Journal ArticleDOI
Nanostructured Nonprecious Metal Catalysts for Oxygen Reduction Reaction
Gang Wu,Piotr Zelenay +1 more
TL;DR: This Account discusses how to obtain highly promising M-N-C (M: Fe and/or Co) catalysts by simultaneously heat-treating precursors of nitrogen, carbon, and transition metals at 800-1000 °C and controls the formation of different nanostructures during the synthesis of M-n-C catalysts.
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Recent advances in polyaniline research: Polymerization mechanisms, structural aspects, properties and applications
TL;DR: Recent progress in synthesis, characterization, processing and application of polyaniline (PANI) with the focus on the period 2010-2012 is reviewed in this paper, where new insights in the mechanism of formation of molecular/supramolecular PANI structures are discussed.
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Carbon nanocomposite catalysts for oxygen reduction and evolution reactions: From nitrogen doping to transition-metal addition
Gang Wu,Ana Santandreu,William Kellogg,Shiva Gupta,Ogechi Ogoke,Hanguang Zhang,Hsing-Lin Wang,Liming Dai +7 more
TL;DR: In this paper, the authors provide an overview of carbon-based catalysts in terms of synthesis, structure/morphology, and catalytic activity and durability enhancement for ORR and OER.
References
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The characterization of activated carbons with oxygen and nitrogen surface groups
TL;DR: The physicochemical properties and the surface chemical structure of the carbon materials obtained by the modification of the commercial activated carbon D43/1 (Carbo-Tech, Essen, Germany) were studied in this article.
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The preparation of active carbons from coal by chemical and physical activation
Ali Ahmadpour,Duong D. Do +1 more
TL;DR: In this article, the effect of process variables such as carbonization time, temperature, particle size, chemical agents, method of mixing and impregnation ratio in the chemical activation process was studied in order to optimize those preparation parameters.
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Structure, composition, and chemical reactivity of carbon nanotubes by selective nitrogen doping
TL;DR: In this article, nitrogen-doped carbon nanotubes (N-CNTs) were used to assess quantitatively the compositional and structural properties of the N-Notubes and Raman microscopy analysis indicated a shift in and broadening of the C 1s spectra track with increasing disorder induced by selective nitrogen doping.
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Superhard and elastic carbon nitride thin films having fullerenelike microstructure.
TL;DR: In this article, the buckled and curved basal planes were found to have a distorted graphitel-like microstructure, and the buckling is due to the incorporation of pentagons in the basal planes, giving rise to a fullerenelike micro-structure.
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Poly(vinyl pyrrolidone): a dual functional reductant and stabilizer for the facile synthesis of noble metal nanoplates in aqueous solutions
TL;DR: It is demonstrated that hydroxyl-terminated PVP is also a well-suited reductant for the aqueous synthesis of circular, triangular, and hexagonal nanoplates made of other noble metals including Pd, Au, and Pt.