Surface coordination chemistry on graphene and two-dimensional carbon materials for well-defined single atom supported catalysts

Axet, M. Rosa; Durand, Jérôme; Gouygou, Maryse; Serp, Philippe

doi:10.1016/bs.adomc.2019.01.002

Cited by 46 publications

(37 citation statements)

References 236 publications

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“…GO is formed by decorated graphene sheets with oxygen functional groups, and is an ideal processable form of graphene that can yield stable dispersions in various solvents [ 56 , 57 ]. The high number of oxygen-donor anchoring groups facilitates the immobilization and enhances the adsorption performance of metal catalysts [ 58 , 59 , 60 ]. Use of graphene oxide as a support has been reported in catalytic processes such as water or oxygen reduction reactions, coupling reactions, hydrodeoxygenation reactions, and, among other biomass conversion reactions [ 61 , 62 , 63 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity and Stability in Hydrogen Evolution of Mo6 Iodide Clusters Supported on Graphene Oxide

et al. 2020

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Catalytic properties of the cluster compound (TBA)2[Mo6Ii8(O2CCH3)a6] (TBA = tetrabutylammonium) and a new hybrid material (TBA)2Mo6Ii8@GO (GO = graphene oxide) in water photoreduction into molecular hydrogen were investigated. New hybrid material (TBA)2Mo6Ii8@GO was prepared by coordinative immobilization of the (TBA)2[Mo6Ii8(O2CCH3)a6] onto GO sheets and characterized by spectroscopic, analytical, and morphological techniques. Liquid and, for the first time, gas phase conditions were chosen for catalytic experiments under UV–Vis irradiation. In liquid water, optimal H2 production yields were obtained after using (TBA)2[Mo6Ii8(O2CCH3)a6] and (TBA)2Mo6Ii8@GO) catalysts after 5 h of irradiation of liquid water. Despite these remarkable catalytic performances, “liquid-phase” catalytic systems have serious drawbacks: the cluster anion evolves to less active cluster species with partial hydrolytic decomposition, and the nanocomposite completely decays in the process. Vapor water photoreduction showed lower catalytic performance but offers more advantages in terms of cluster stability, even after longer radiation exposure times and recyclability of both catalysts. The turnover frequency (TOF) of (TBA)2Mo6Ii8@GO is three times higher than that of the microcrystalline (TBA)2[Mo6Ii8(O2CCH3)a6], in agreement with the better accessibility of catalytic cluster sites for water molecules in the gas phase. This bodes well for the possibility of creating {Mo6I8}4+-based materials as catalysts in hydrogen production technology from water vapor.

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Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity and Stability in Hydrogen Evolution of Mo6 Iodide Clusters Supported on Graphene Oxide

et al. 2020

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“…100 Similarly, the emerging single atom catalysts for reduction reactions are based in these metals. 101 It is not surprising that Ru NPs have found applications as catalysts for a large panel of reduction reactions, mainly C=C and C=O bonds, in a broad range of reaction conditions. Ru NPs used as catalysts in reduction reactions are synthesised by one of the methodologies described above using a large variety of stabilizing agents, such as polymers, [73][74][102][103][104][105][106][107][108][109][110][111] phosphines, [112][113][114][115][116] N-donor ligands, 50,[117][118] ILs, [83][84][119][120][121][122][123][124][125][126][127][128][129][130][131] NHC, 96,[132][133][134][135][136][137][138]…”

Section: Reduction Reactionsmentioning

confidence: 99%

Catalysis with Colloidal Ruthenium Nanoparticles

2020

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This review provides a synthetic overview of the recent research advancements addressing the topic of catalysis with colloidal ruthenium metal nanoparticles through the last five years. The aim is to enlighten the interest of ruthenium metal at the nanoscale for a selection of catalytic reactions performed in solution condition. The recent progress in nanochemistry allowed providing well-controlled ruthenium nanoparticles which served as models and allowed study of how their characteristics influence their catalytic properties. Although this parameter is not enough often taken into consideration the surface chemistry of ruthenium nanoparticles starts to be better understood. This offers thus a strong basis to better apprehend catalytic processes on the metal surface and also explore how these can be affected by the stabilizing molecules as well as the ruthenium crystallographic structure. Ruthenium nanoparticles have been reported for their application as catalysts in solution for diverse reactions. The main ones are reduction, oxidation, Fischer–Tropsch, C–H activation, CO2 transformation, and hydrogen production through amine borane dehydrogenation or water-splitting reactions, which will be reviewed here. Results obtained showed that ruthenium nanoparticles can be highly performant in these reactions, but efforts are still required in order to be able to rationalize the results. Beside their catalytic performance, ruthenium nanocatalysts are very good models in order to investigate key parameters for a better controlled nanocatalysis. This is a challenging but fundamental task in order to develop more efficient catalytic systems, namely more active and more selective catalysts able to work in mild conditions.

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“…The mechanism of photo catalytic water splitting along with generation and recombination of photo-induced charge carriers is depicted in Figure 4. Reproduced From (Axet et al, 2019) Recently, a new finding based on the interaction between photocatalysts and microorganisms has opened a general pathway for sustainable remediation of environmental pollutants and has explored the sustainable growth of photocatalysts as well (Deng et al, 2020). Based on the extensive literature, three types of interactions were established between photocatalysts and microorganisms as follows: 1) photocatalytic damage to microorganisms which includes sterilisation of microorganisms and disinfection of public environment.…”

Section: Figure 3 Photocatalytic Degradation Of Various Pollutants By Sustainable Approaches Using Metallic Nanoparticlesmentioning

confidence: 99%

Nanoremediation technologies for sustainable remediation of contaminated environments: Recent advances and challenges

et al. 2021

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A major and growing concern within society is the lack of innovative and effective solutions to mitigate the challenge of environmental pollution. Uncontrolled release of pollutants into the environment as a result of urbanisation and industrialisation is a staggering problem of global concern. Although, the eco-toxicity of nanotechnology is still an issue of debate, however, nanoremediation is a promising emerging technology to tackle environmental contamination, especially dealing with recalcitrant contaminants. Nanoremediation represents an innovative approach for safe and sustainable remediation of persistent organic compounds such as pesticides, chlorinated solvents, brominated or halogenated chemicals, perfluoroalkyl and polyfluoroalkyl substances (PFAS), and heavy metals. This comprehensive review article provides a critical outlook on the recent advances and future perspectives of nanoremediation technologies such as photocatalysis, nano-sensing etc., applied for environmental decontamination. Moreover, sustainability assessment of nanoremediation technologies was taken into consideration for tackling legacy contamination

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Surface coordination chemistry on graphene and two-dimensional carbon materials for well-defined single atom supported catalysts

Cited by 46 publications

References 236 publications

Enhanced Photocatalytic Activity and Stability in Hydrogen Evolution of Mo6 Iodide Clusters Supported on Graphene Oxide

Enhanced Photocatalytic Activity and Stability in Hydrogen Evolution of Mo6 Iodide Clusters Supported on Graphene Oxide

Catalysis with Colloidal Ruthenium Nanoparticles

Nanoremediation technologies for sustainable remediation of contaminated environments: Recent advances and challenges

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