Supported rhenium nanoparticle catalysts for acceptorless dehydrogenation of alcohols: structure–activity relationship and mechanistic studies

Kon, Kenichi; Onodera, Wataru; Toyao, Takashi; Shimizu, Ken‐ichi

doi:10.1039/c6cy00252h

Cited by 23 publications

(15 citation statements)

References 31 publications

(44 reference statements)

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“…The nature of the support can influence the performance of a catalyst in the acceptor-less alcohol dehydrogenation. [18,22,24,29,31,34,36] According to Shimizu et al, Co was the most active on amphoteric TiO2 as the carrier for the dehydrogenation of cyclododecanol. [36] In this work, we aimed to investigate the effect of the support in the acceptor-less dehydrogenation of 2-octanol and also to examine the influence of the crystallographic composition of TiO2 on the catalyst activity.…”

Section: Activitymentioning

confidence: 99%

“…Noble metal-based catalysts, i.e. Pt, [18] Pd, [19] Ru, [20,21] Re, [22] Au, [23][24][25] and Ag, [26][27][28][29][30] have been shown to be active towards acceptor-less alcohol dehydrogenation. Due to their higher abundancy and lower costs, non-noble metal catalysts have also been investigated, namely Cu, [31][32][33] Ni, [34,35] and Co [36] which proved to be also active.…”

Section: Introductionmentioning

confidence: 99%

“…[37] The acid-base properties of the support are crucial and supports of amphoteric nature were found to enhance the activity of catalysts. For Pt, [18] Re, [22] Ag, [29] and Ni [34] catalysts the most beneficial support was Al2O3, while for Co [36] TiO2 was preferred, and for Au [24] and Cu [31] HT (hydrotalcite) was favoured. This implies that the optimal support should be identified depending on the metal.…”

Section: Introductionmentioning

confidence: 99%

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Supported Cobalt Catalysts for Acceptorless Alcohol Dehydrogenation

et al. 2020

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Section: Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Supported Cobalt Catalysts for Acceptorless Alcohol Dehydrogenation

et al. 2020

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“…The reactivity of these nanocatalysts is largely in uenced by the method of preparation, cluster size, geometry and the metal composition [7][8][9][10]. The nature of the support plays also a crucial role in the reactivity of the nanocatalysts [11][12]. For example, in the dehydrogenation of 2-octanol, the rhenium clusters supported on Al 2 O 3 are found to be more active than those supported on SnO 2 , and the catalytic activity of the particles was multiplied by 5.2 when Al 2 O 3 support was replaced by SnO 2 [11].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of the guanine molecule over the pristine, Nb-, and Au-doped boron nitride nanosheets: a DFT study

Derdare

Boudjahem

2021

Struct Chem

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A theoretical study has been performed onto the pristine, Nb-and Au-doped boron nitride (BN) nanosheets using DFT calculations with the B3LYP-D3 method in order to evaluate their stabilities and electronic properties. The interaction of the guanine molecule with these clusters was also examined in aim to determine their adsorption properties. The calculations show that the HOMO-LUMO energy gap (E g ) of the BN nanosheet was strongly decreased upon its doping with Nb and Au atoms, implying a strong enhancement in its surface reactivity. The interaction of the guanine with the BN sheet was found to be weak, which leads a slight variation in its energy gap, therefore a low sensitivity of this nanosheet toward the guanine was observed. The guanine adsorption over the NbBN cluster is very strong, and the calculated adsorptions energies are in the range of -36.7 to -60.2 kcal mol -1 , suggesting a great chemical adsorption. For the AuBN cluster, the guanine molecule has been chemisorbed onto its surface with adsorption energies varying of -24.2 to -38.4 kcal mol -1 , which are lower than those obtained for the NbBN cluster. Upon adsorption proceess, the energy gap of the NbBN cluster was greatly increased, which leads to a decrease in its electric conductivity, thereby it cannot be a suitable sensor for the guanine molecule. On the contrary, the energy gap of the AuBN cluster was reduced by the effect of the guanine adsorption on its surface, indicating an increase in its electrical conductivity, thus the AuBN cluster possess a great electronic sensitivity to the guanine molecule. Based on the transition state theory, the recovery time of the guanine from the AuBN cluster was estimated of 27.6 s, re ecting that the Audoped BN nanosheet could be employed as an appropriate nanomaterial for the guanine molecule detection with a short recovery time.

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“…Recently, nickel complexes were also reported [8]. In heterogeneous dehydrogenative catalytic systems, mainly noble metals catalysts were reported: alumina-supported silver cluster, hydrotalcite supported silver nanoparticles, ceria supported gold nanoparticles, alumina-supported Pt nanoparticles, alumina-supported Re nanoparticles [9][10][11][12][13]. Particularly, high reactivity was reported for the oxidation of aliphatic alcohols in anaerobic condition [12].…”

Section: Introductionmentioning

confidence: 99%

Dehydrogenative Oxidation of Alcohols Catalyzed by Highly Dispersed Ruthenium Incorporated Titanium Oxide

et al. 2016

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Ruthenium incorporated titanium oxides (Ru x TiO 2 ) were prepared by a one-step hydrothermal method using Ti(SO 4 ) 2 and RuCl 3 as the precursor of Ti and Ru, respectively. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), Energy-dispersive X-ray spectroscopy (EDS) mapping, and BET were applied for the analyses of catalysts. Ruthenium atoms are well dispersed in the anatase phase of TiO 2 and the crystallite size of Ru x TiO 2 (≈17 nm) is smaller than that of pure TiO 2 (≈45 nm). In particular, we found that our homemade pure TiO 2 exhibits a strong Lewis acid property. Therefore, the cooperation of ruthenium atoms playing a role in the hydride elimination and the Lewis acid site of TiO 2 can efficiently transfer primary alcohols into corresponding aldehydes in an oxidant-free condition.

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Supported rhenium nanoparticle catalysts for acceptorless dehydrogenation of alcohols: structure–activity relationship and mechanistic studies

Cited by 23 publications

References 31 publications

Supported Cobalt Catalysts for Acceptorless Alcohol Dehydrogenation

Supported Cobalt Catalysts for Acceptorless Alcohol Dehydrogenation

Adsorption of the guanine molecule over the pristine, Nb-, and Au-doped boron nitride nanosheets: a DFT study

Dehydrogenative Oxidation of Alcohols Catalyzed by Highly Dispersed Ruthenium Incorporated Titanium Oxide

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