Noble Metal‐Free Oxidative Electrocatalysts: Polyaniline and Co(II)‐Polyaniline Nanostructures Hosted in Nanoporous Silica

Silva, Rafael; Asefa, Tewodros

doi:10.1002/adma.201104126

Cited by 51 publications

(39 citation statements)

References 64 publications

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“…4b. It can be seen that the TOF obtained considering two-electron process (CO, CO 3 2-and C 2 O 4 2-products) is larger for CuNPs on rGO than the Cu thin films, suggesting that the CO 2 reduction is more favorable for CuNPs on rGO. It can also be seen from Fig.…”

Section: Co 2 Reduction Reactionmentioning

confidence: 97%

“…In addition, the mechanism for CO 2 reduction in low hydrogen availability medium is well known. Only three species can be obtained: carbon monoxide (CO), carbonate (CO 3 2-) or oxalate (C 2 O 4 2-) involve 2 electrons each (Equation I and II). Oxalate formation requires C-C coupling which is known to occur at higher overpotentials ([0.9 V vs. RHE) [9,10].…”

Section: Co 2 Reduction Reactionmentioning

confidence: 99%

“…Various methods and devices to generate sustainable forms of energy that are efficient and affordable have been reported [1][2][3][4]. In addition to clean energy, the high amount of CO 2 emitted in the atmosphere must also be mitigated [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Copper nanoparticles stabilized by reduced graphene oxide for CO2 reduction reaction

Alves

Silva

Voiry

et al. 2015

Mater Renew Sustain Energy

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Carbon dioxide (CO 2 ) is one of the main gases produced by human activity and is responsible for the green house effect. Numerous routes for CO 2 capture and reduction are currently under investigation. Another approach to mitigate the CO 2 content in the atmosphere is to convert it into useful species such as hydrocarbon molecules that can be used for fuel. In this view, copper is one of the most interesting catalyst materials for CO 2 reduction due to its remarkable ability to generate hydrocarbon fuels. However, its utilization as an effective catalyst for CO 2 reduction is hampered by its oxidation and relatively high voltages. We have fabricated hybrid materials for CO 2 reduction by combining the activity of copper and the conductivity of reduced graphene oxide (rGO). Cu nanoparticles (CuNPs) deposited on rGO have demonstrated higher current density and lower overpotential compared to other copper-based electrodes that we have tested. The CuNPs on rGO also exhibit better stability, preserving their catalytic activity without degradation for several hours.

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Section: Co 2 Reduction Reactionmentioning

confidence: 97%

Section: Co 2 Reduction Reactionmentioning

confidence: 99%

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Copper nanoparticles stabilized by reduced graphene oxide for CO2 reduction reaction

Alves

Silva

Voiry

et al. 2015

Mater Renew Sustain Energy

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“…In this regard, cobalt based catalysts also shown comparable activity towards various organic transformations, such as hydroformylation, hydrosilylation, Fisher-Tropsch synthesis, hydroxylation, reforming, and various redox processes [22][23][24][25][26][27][28][29][30][31]. For example, cobalt-polyaniline nanostructure hosted SBA-15 shown as a capable catalyst for oxidation process [29]. Similarly, cobalt(II) complex grafted on SBA-15 has catalytic ability for acetylation of aldehydes and oxidation of alcohols at elevated temperature and microwave conditions using excess H 2 O 2 [30,31].…”

Section: Introductionmentioning

confidence: 99%

“…Heterogenization of various transition metal based homogenous catalysis with salen, acac, and cyclopentadienyl-based ligands are shown very good catalytic ability for several oxidation reactions [16][17][18][19][20][21]. In this regard, cobalt based catalysts also shown comparable activity towards various organic transformations, such as hydroformylation, hydrosilylation, Fisher-Tropsch synthesis, hydroxylation, reforming, and various redox processes [22][23][24][25][26][27][28][29][30][31]. For example, cobalt-polyaniline nanostructure hosted SBA-15 shown as a capable catalyst for oxidation process [29].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Heterogenization of Siloxane Functionalized Cobalt Complex: Potential Catalyst for Oxidation of Alcohols

et al. 2015

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Cobalticinium complex containing siloxane moiety on ligand center was first time synthesized, characterized and heterogenized on the surface of SBA-15 molecular sieves. FT-IR and 29 Si-MAS-NMR spectrum evidence the successful grafting of the cobalt complex on the surface of SBA-15. N 2 sorption isotherm of cobalticinium complex grafted sample showed the decrease in surface area, pore volume, further confirms the presence of complex inside the channel of mesoporous SBA-15. The heterogenized complex exhibited promising activity for oxidation of alcohols with good selectivity of ketone. Further the catalytic activity remains intact after two recycles. Graphical Abstract Cobalticinium complex possessing siloxane functionality was prepared first time and heterogenized on SBA-15 surface. The resultant materials showed as promising recyclable heterogeneous catalyst for oxidation of alcohols.

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Nanocatalysis: Catalysis with Nanoscale Materials

Asefa

Huang

2017

Handbook of Solid State Chemistry

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This chapter is intended to provide readers with basic information on the synthesis, characterization, and potential applications of nanostructured catalysts. The chapter starts with a brief introduction of nanomaterials and catalysis. It then introduces nanocatalysis. The chapter then delves into discussions of the different types of nanocatalytic materials and the notable synthetic methods used for making them, followed by the fundamental aspects of their size‐ and shape‐dependent catalytic properties and structure–catalytic property relationships. The chapter also includes discussion on the properties of various nanostructured catalysts. In each topic, there are mentions of the various applications or potential applications of nanoscale materials for catalysis of numerous important chemical reactions, ranging from those that enable the efficient production of commodity and value‐added chemical products to those that allow the generation of renewable energy. Finally, the chapter outlines the authors' opinions on the future outlooks of the field of nanocatalysis. Most of the discussions will rely on notable, but not exhaustive, examples from the literature.

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Noble Metal‐Free Oxidative Electrocatalysts: Polyaniline and Co(II)‐Polyaniline Nanostructures Hosted in Nanoporous Silica

Cited by 51 publications

References 64 publications

Copper nanoparticles stabilized by reduced graphene oxide for CO2 reduction reaction

Copper nanoparticles stabilized by reduced graphene oxide for CO2 reduction reaction

Synthesis and Heterogenization of Siloxane Functionalized Cobalt Complex: Potential Catalyst for Oxidation of Alcohols

Nanocatalysis: Catalysis with Nanoscale Materials

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