From “waste to gold”: a one-pot method to synthesize ultrafinely dispersed Fe<sub>2</sub>O<sub>3</sub>-based nanoparticles on N-doped carbon for synergistic and efficient water splitting

Su, Danyang; Wang, Jing; Jin, Haiyan; Gong, Yutong; Li, Mingming; Pang, Zhenfeng; Wang, Yong

doi:10.1039/c5ta02217g

Cited by 61 publications

(36 citation statements)

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“…Thus, artificial Fe‐based inorganic compounds are expected to be HER catalysts. Given that, our group prepared Fe‐based composites (Fe 2 O 3 /Fe@CN) that were composed of Fe species embedded in N‐doped carbon skeleton through a one‐pot pyrolysis process ( Figure ) . The introduction of N atoms not only prevents the metal NPs from aggregating, but also tunes the electronic structure of carbon substrates and strengthens the interplay between metal and carbon skeleton.…”

Section: Hydrogen Evolution Reactionmentioning

confidence: 99%

Non‐Noble Metal‐based Carbon Composites in Hydrogen Evolution Reaction: Fundamentals to Applications

et al. 2017

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Hydrogen has been hailed as a clean and sustainable alternative to finite fossil fuels in many energy systems. Water splitting is an important method for hydrogen production in high purity and large quantities. To accelerate the hydrogen evolution reaction (HER) rate, it is highly necessary to develop high efficiency catalysts and to select a proper electrolyte. Herein, the performances of non-noble metal-based carbon composites under various pH values (acid, alkaline and neutral media) for HER in terms of catalyst synthesis, structure and molecular design are systematically discussed. A detailed analysis of the structure-activity-pH correlations in the HER process gives an insight on the origin of the pH-dependence for HER, and provide guidance for future HER mechanism studies on non-noble metal-based carbon composites. Furthermore, this Review gives a fresh impetus to rational design of high-performance noble-metal-free composites catalysts and guide researchers to employ the established electrocatalysts in proper water electrolysis technologies.

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Section: Hydrogen Evolution Reactionmentioning

confidence: 99%

Non‐Noble Metal‐based Carbon Composites in Hydrogen Evolution Reaction: Fundamentals to Applications

et al. 2017

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“…1,2 Development of new materials holds the key to fundamental advances in catalysis, both of which are vital in order to meet the challenge of environmental and energy crises. [3][4][5] Functionalized amines are industrially important intermediates for the manufacture of pharmaceuticals, agrochemicals, dyes, and fine chemicals. 6,7 The general method for the synthesis of anilines is the reduction of aromatic nitro compounds.…”

Section: Introductionmentioning

confidence: 99%

In Situ-Generated Co⁰-Co₃O₄/N-Doped Carbon Nanotubes Hybrids as Efficient and Chemoselective Catalysts for Hydrogenation of Nitroarenes

et al. 2015

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The earth-abundant nanohybrids Co 0 /Co 3 O 4 @N-doped carbon nanotubes were fabricated via an efficient thermal condensation of D-glucosamine hydrochloride, melamine and Co(NO 3 ) 2 ·6H 2 O. The hybrids furnish excellent catalytic activity and perfect chemoselectivity (>99%) for a wide range of substituted nitroarenes (21 examples) under relatively mild conditions. The high catalytic performance and durability is attributed to the synergistic effects between each component, the unique structure of graphene layers-coated Co 0 and the electronic activation of doped nitrogen. Density functional calculations indicate that the inner Co 0 core and N species on the carbon shell can significantly decrease the dissociation energies of H 2 , giving evidence of the ability of carbon shell in the hybrids to H 2 activation. These results open up an avenue to design more powerful low-cost catalysts for industrial applications.

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“…Among the various dopants, nitrogen attracted most interest [15,[20][21][22]. and applications of transition metal/N-doped graphene (NGr) based catalytic systems ranges from oxygen reduction reactions (ORR) [23][24][25][26], hydrogen evolving reactions (HER) [27,28], photocatalysis [29,30], oxidation [31][32][33][34][35][36][37][38], and reduction [39][40][41][42][43][44] reactions of organic molecules, C-C bond formation [45] to many others [46][47][48][49][50][51]. Hence, merging rationally-designed suitable modified supports with cheap transition metals permits access to the design of active, selective and cheap catalytic materials thus allowing to match or to outperform noble-metal-based catalysts.…”

Section: Introductionmentioning

confidence: 99%

Co-based heterogeneous catalysts from well-defined α-diimine complexes: Discussing the role of nitrogen

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Ferretti

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et al. 2017

Journal of Catalysis

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‡ These authors contributed equally to this work.Abstract: Ar-BIANs and related α-diimine Co complexes were wet impregnated onto Vulcan® XC 72 R carbon black powder and used as precursors for the synthesis of heterogeneous supported nanoscale catalysts by pyrolysis under argon at 800 °C. The catalytic materials feature a core-shell structure composed of metallic Co and Co oxides decorated with nitrogen-doped graphitic layers (NGr). These catalysts display high activity in the liquid phase hydrogenation of aromatic nitro compounds (110 °C, 50 bar H2) to give chemoselectively substituted aryl amines. The catalytic activity is closely related to the amount and type of nitrogen atoms in the final catalytic material, which suggests a heterolytic activation of dihydrogen.Keywords: cobalt, hydrogenation, nitro compounds, kinetic, heterolytic activation IntroductionCatalysis is a key-technology for the manufacturing of all kinds of bulk and fine chemical products. It allows for producing chemicals avoiding the formation of undesired and useless stoichiometric side products which leads to additional cost and energy consumption [1][2][3]. Many of the industrially relevant catalytic processes in the fine chemical industry are still based on expensive and rare late transition metals such as Pd, Pt, Rh, Ru and Ir [4,[1][2][3][4][5]. Although these metals exhibit very good catalytic performance for advanced organic substrates, the decreasing availability of these elements requires the development of efficient alternative metal-based catalysts [6]. In this regard, the design of catalytic systems based on abundant and biocompatible metals is an important goal for the implementation and progress of green and sustainable chemistry. Hence, transition metals such as Fe, Co and Cu are ideal candidates, which meet these requirements [7][8][9][10]. As a matter of fact, these elements are among the most abundant metals in the Earth's upper crust, thus being readily accessible [11]. Recently, heteroatom-doped carbon materials attracted major interest in the field of metal supported heterogeneous catalysts for both chemical synthesis [12][13][14] and/or energy-relevant transformations [15,16]. Indeed, doping graphene with heteroatoms such as N, B, P, or S leads to a radical modification of the electronic properties of both the support and the supported metal [17][18][19]. Consequently, it is possible to modify the activity and adjust the selectivity of the final catalytic material towards the desired transformation. Among the various dopants, nitrogen attracted most interest [15,[20][21][22]. and applications of transition metal/N-doped graphene (NGr) based catalytic systems ranges from oxygen reduction reactions (ORR) [23][24][25][26], hydrogen evolving reactions (HER) [27,28], photocatalysis [29,30], oxidation [31][32][33][34][35][36][37][38], and reduction [39][40][41][42][43][44] reactions of organic

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From “waste to gold”: a one-pot method to synthesize ultrafinely dispersed Fe₂O₃-based nanoparticles on N-doped carbon for synergistic and efficient water splitting

Abstract: We report a novel, simple, and one-pot method for the synthesis of ultrafinely dispersed iron oxide based nanoparticles (NPs) embedded in a nitrogen doped carbon matrix (denoted as Fe2O3/Fe@CN).

Cited by 61 publications

References 57 publications

Non‐Noble Metal‐based Carbon Composites in Hydrogen Evolution Reaction: Fundamentals to Applications

Non‐Noble Metal‐based Carbon Composites in Hydrogen Evolution Reaction: Fundamentals to Applications

In Situ-Generated Co⁰-Co₃O₄/N-Doped Carbon Nanotubes Hybrids as Efficient and Chemoselective Catalysts for Hydrogenation of Nitroarenes

Co-based heterogeneous catalysts from well-defined α-diimine complexes: Discussing the role of nitrogen

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From “waste to gold”: a one-pot method to synthesize ultrafinely dispersed Fe2O3-based nanoparticles on N-doped carbon for synergistic and efficient water splitting

Abstract: We report a novel, simple, and one-pot method for the synthesis of ultrafinely dispersed iron oxide based nanoparticles (NPs) embedded in a nitrogen doped carbon matrix (denoted as Fe2O3/Fe@CN).

Cited by 61 publications

References 57 publications

Non‐Noble Metal‐based Carbon Composites in Hydrogen Evolution Reaction: Fundamentals to Applications

Non‐Noble Metal‐based Carbon Composites in Hydrogen Evolution Reaction: Fundamentals to Applications

In Situ-Generated Co0-Co3O4/N-Doped Carbon Nanotubes Hybrids as Efficient and Chemoselective Catalysts for Hydrogenation of Nitroarenes

Co-based heterogeneous catalysts from well-defined α-diimine complexes: Discussing the role of nitrogen

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From “waste to gold”: a one-pot method to synthesize ultrafinely dispersed Fe₂O₃-based nanoparticles on N-doped carbon for synergistic and efficient water splitting

In Situ-Generated Co⁰-Co₃O₄/N-Doped Carbon Nanotubes Hybrids as Efficient and Chemoselective Catalysts for Hydrogenation of Nitroarenes