Journal ArticleDOI
Metal-free catalysts for oxygen reduction reaction.
TLDR
This paper presents a probabilistic procedure for estimating the polymethine content of carbon dioxide using a straightforward two-step procedure, and shows good results in both the stationary and the liquid phase.Abstract:
Liming Dai,*,†,‡ Yuhua Xue,†,‡ Liangti Qu,* Hyun-Jung Choi, and Jong-Beom Baek* †Center of Advanced Science and Engineering for Carbon (Case4Carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Department of Chemistry, School of Science, Beijing Institute of Technology, Beijing 100081, People’s Republic of China School of Energy and Chemical Engineering/Center for Dimension-Controllable Covalent Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon, Ulsan, 689-798, South Korearead more
Citations
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Active sites of nitrogen-doped carbon materials for oxygen reduction reaction clarified using model catalysts
TL;DR: In this paper, the oxygen reduction reaction (ORR) active site was characterized by using newly designed graphite (highly oriented pyrolitic graphite) model catalysts with well-defined π conjugation and well-controlled doping of N species.
Journal ArticleDOI
Cocatalysts for Selective Photoreduction of CO2 into Solar Fuels.
TL;DR: Various cocatalysts, such as the biomimetic, metal-based,Metal-free, and multifunctional ones, and their selectivity for CO2 photoreduction are summarized and discussed, along with the recent advances in this area.
Journal ArticleDOI
Emerging Two-Dimensional Nanomaterials for Electrocatalysis
Huanyu Jin,Chunxian Guo,Xin Liu,Jinlong Liu,Anthony Vasileff,Yan Jiao,Yao Zheng,Shi-Zhang Qiao +7 more
TL;DR: The fundamental relationships between electronic structure, adsorption energy, and apparent activity for a wide variety of 2D electrocatalysts are described with the goal of providing a better understanding of these emerging nanomaterials at the atomic level.
Journal ArticleDOI
Defect Chemistry of Nonprecious-Metal Electrocatalysts for Oxygen Reactions
TL;DR: The recent development of this concept is reviewed here and a novel principle for the design of oxygen electrocatalysts is proposed and an overview of the defects in carbon-based, metal-free electrocatalysis for ORR and various defects in metal oxides/selenides for OER is provided.
Structural (n,m) determination of isolated single wall carbon nanotubes by resonant Raman scattering
Mildred S. Dresselhaus,Ado Jorio,G. Dresselhaus,Martin Hunter,T. McClure,Jason H. Hafner,Charles M. Lieber,Riichiro Saito +7 more
TL;DR: In this paper, a unique chirality assignment was made for both metallic and semiconducting nanotubes of diameter d(t), using the parameters gamma(0) = 2.9 eV and omega(RBM) = 248/d(t).
References
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Journal ArticleDOI
Dealloyed Pt−Cu Core−Shell Nanoparticle Electrocatalysts for Use in PEM Fuel Cell Cathodes
Abstract: We report the synthesis, characterization, and single fuel cell testing of a novel class of nanostructured Pt−Cu alloy particle materials for use as oxygen reduction electrocatalyst in polymer electrolyte membrane fuel cells The active phase of the Pt alloy nanoparticle catalysts is prepared by electrochemical dissolution (voltammetric dealloying) of Cu surface atoms from Cu-rich Pt−Cu alloy precursors Bulk and surface structural and compositional characterization suggests that the dealloyed active catalyst phase consists of a core−shell structure in which a multilayer Pt rich shell is surrounding a Pt-poor alloy particle core The electrocatalytic Pt mass activity of the dealloyed core−shell particles for the oxygen reduction reaction (ORR) exceeds that of state-of-the art Pt electrocatalyst by more than a factor of 4 and thus meets performance targets for fuel cell cathodes [Gasteiger, H A; Kocha, S S; Sompalli, B; Wagner, F T Appl Catal B: Environ 2005, 56, 9−35]1 It is hypothesized that
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Recent advances in activity and durability enhancement of Pt/C catalytic cathode in PEMFC: Part I. Physico-chemical and electronic interaction between Pt and carbon support, and activity enhancement of Pt/C catalyst
Xingwen Yu,Siyu Ye +1 more
TL;DR: A review of recent advances related to the physico-chemical and electronic interactions at the catalyst-support interface and the catalyst activity enhancement through improved Pt-C interaction is provided in this article.
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Catalytic graphitization of carbon aerogels by transition metals
Francisco J. Maldonado-Hódar,Carlos Moreno-Castilla,José Rivera-Utrilla,Y. Hanzawa,Y. Yamada +4 more
TL;DR: Carbon aerogels and Cr-, Fe-, Co-, and Ni-containing carbon aerogel were obtained by pyrolysis, at temperatures between 500 and 1800 °C, of the corresponding carbon-airogels prepared by the sol−gel metho...
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The edge- and basal-plane-specific electrochemistry of a single-layer graphene sheet
Wenjing Yuan,Yu Zhou,Yingru Li,Chun Li,Hailin Peng,Jin Zhang,Zhongfan Liu,Liming Dai,Gaoquan Shi +8 more
TL;DR: The graphene edge showed 4 orders of magnitude higher specific capacitance, much faster electron transfer rate and stronger electrocatalytic activity than those of graphene basal plane, making it an ideal electrode for electrocatalysis and for the storage of capacitive charges.
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Promoting Formation of Noncrystalline Li2O2 in the Li–O2 Battery with RuO2 Nanoparticles
TL;DR: It is demonstrated that the RuO2 NPs contribute to the formation of poorly crystalline lithium peroxide (Li2O2) that is coated over the CNT with large contact area during oxygen reduction reaction (ORR).