Bimetallic Au–Ni alloy nanoparticles in a metal–organic framework (MIL-101) as efficient heterogeneous catalysts for selective oxidation of benzyl alcohol into benzaldehyde

Liu, Lili; Tai, Xi–Shi; Zhou, Xiaojing; Hou, Jingxin; Zhang, Zihua

doi:10.1016/j.jallcom.2019.03.186

Cited by 51 publications

(32 citation statements)

References 61 publications

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“…According to the NH 3 -TPD measurement, the values of the acid sites for MIL-101, TiO 2 , and C reached 4.013, 0.062, and 0.039 mmol/g, respectively. The highest yield was observed in CuNi/MIL-101, which contained more acid sites in benzyl alcohol oxidation to benzaldehyde, in accordance with previously reported results [11,14]. Benzaldehyde selectivity was lower in the base N,N-dimethylformamide (DMF) than in the THF and 1,4-dioxane solvents over the AuNi/MIL-101-1 catalyst [11].…”

Section: Benzyl Alcohol Oxidation Using Cu-ni Bimetallic Catalystssupporting

confidence: 90%

“…Furthermore, two satellite peaks of Cu 2p3/2 and Cu 2p1/2 were detected, thereby further confirming the existence of Cu 2+ [36,37]. The oxidized Ni of Ni 2+ 2p3/2 and Ni 2+ 2p1/2 were detected at the binding energies of 856.6 and 874.0 eV, respectively, in the Ni 2p spectra of CuNi/MIL-101, CuNi/TiO2, and CuNi/C possibly due to oxidation of the catalysts exposed to air [11,38]. The peaks at 861.8 and 880.2 eV were assigned to satellites in all the catalysts [39].…”

Section: Introductionsupporting

confidence: 52%

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Heterogeneous Bimetallic Cu–Ni Nanoparticle-Supported Catalysts in the Selective Oxidation of Benzyl Alcohol to Benzaldehyde

et al. 2019

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Three bimetallic Cu–Ni nanoparticle-supported catalysts were synthesized by co-immobilization followed by H2 reduction. A chromium(III) terephthalate metal organic framework (MIL-101), titanium dioxide (TiO2), and carbon (C) with different properties (acidity and Brunauer–Emmett–Teller surface area) were selected as supports for studying the effect of the support nature on the catalytic activity and selectivity in the oxidation of benzyl alcohol. The physicochemical properties of the Cu–Ni-supported catalysts were characterized by XRD, NH3-TPD, nitrogen adsorption/desorption, TEM, EDS, XPS, and ICP-OES. Bimetallic Cu–Ni nanoparticles were highly dispersed on the support. The catalytic activities of CuNi/MIL-101, CuNi/TiO2, and CuNi/C were tested in the selective oxidation of benzyl alcohol to benzaldehyde in the presence of molecular oxygen under mild reaction conditions. The highest benzaldehyde yields were achieved with CuNi/TiO2, CuNi/MIL-101, and CuNi/C catalysts at 100 °C within 4 h under 5, 3, and 3 bar of O2, respectively. The bimetallic Cu–Ni-supported catalysts possessed two types of catalytic active sites: acid sites and bimetallic Cu–Ni nanoparticles. The CuNi/MIL-101 catalyst possessed a high number of acid sites and exhibited high yield during selective benzyl alcohol oxidation to benzaldehyde. Importantly, the catalysts exhibited a high functional group (electron-donating and electron-withdrawing groups) tolerance. Cu–Ni-supported catalysts with an Cu:Ni mole ratio of 1:1 exhibited the highest yield of 47% for the selective oxidation of benzyl alcohol to benzaldehyde. Reusability and leaching experiment results exhibited that CuNi/MIL-101 showed better stability than CuNi/TiO2 and CuNi/C catalysts due to the large porous cavities of MIL-101 support; these cavities can be used to trap bimetallic Cu–Ni nanoparticles and inhibit nanoparticle leaching.

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Section: Benzyl Alcohol Oxidation Using Cu-ni Bimetallic Catalystssupporting

confidence: 90%

Section: Introductionsupporting

confidence: 52%

Heterogeneous Bimetallic Cu–Ni Nanoparticle-Supported Catalysts in the Selective Oxidation of Benzyl Alcohol to Benzaldehyde

et al. 2019

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“…[ 34 ] For example, Liu et al reported an Au‐Ni/MIL‐101 photocatalyst showed an efficient photocatalytic degradation for benzyl alcohol oxidation. [ 35 ] 1TMoS 2 @MIL‐53(Fe) composites had the enhanced photocatalytic degradation efficiency compared with original MIL‐53(Fe) and 1T‐MoS 2 . [ 26 ] These results indicated that MOFs can be used as a good substrate to enhance the photo‐reduction CO 2 efficiency.…”

Section: Introductionmentioning

confidence: 99%

Boosting Visible‐Light Photocatalytic Performance for CO₂ Reduction via Hydroxylated Graphene Quantum Dots Sensitized MIL‐101(Fe)

Liu

Tang

et al. 2020

Adv Materials Inter

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Herein, a one‐step solvothermal method that shows incorporation of the graphene quantum dots (GQDs) on Fe‐based metal organic frameworks (MOFs) [MIL‐101(Fe)] to form GQD/MIL‐101(Fe) (G/M101) composites is reported. MIL‐101(Fe) with the sensitization of GQDs could significantly improve the photocatalytic reduction efficiency of CO2 to generate CO. The prepared composites exhibit excellent optical properties and the photocatalytic activity of G/M101 composites is relevant to GQDs ratio. The CO production rate over G/M101‐5% (224.71 µmol h−1 g−1) is 5 times higher than that of MIL‐101(Fe) (46.20 µmol h−1 g−1). The promising photocatalytic activity of G/M101‐5% strongly depends on the beneficial separation and transfer of photoinduced carriers via a charge migration between GQDs and MIL‐101(Fe). The microstructures and interfacial structures of the G/M101‐5% composite demonstrate that GQDs are closely loaded on the surface of MIL‐101 (Fe), and thus favors to the photoreduction according to their sp2 bonding. This work may figure a new way for the synthesis of photocatalysts for the application on carbon stabilization.

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“…[45][46][47][48][49][50][51] Among various MOF-types, MIL-101(Cr) has been shown to possess extremely large windows and surface areas (S Langmuir ¼ 5900 m 2 g À1 ), remarkable thermal stability (up to 300 C), and excellent chemical stability toward many solvents. [52][53][54] These properties have enabled MIL-101(Cr) to be successfully applied in various elds, including its particularly attractive use as a supports for heterogeneous catalyst. [55][56][57][58][59][60][61][62][63][64] Recently, various metal nanoparticle (NP) catalysts supported on MIL-101(Cr) (NPs/MIL-101(Cr)), such as Au/MIL-101(Cr), 59 Pd/MIL-101(Cr), 65 Ru/MIL-101(Cr), 66 and Pt/MIL-101(Cr), 67,68 have been tested for the hydrogenation catalytic reaction.…”

Section: Introductionmentioning

confidence: 99%

Bimetallic Au–Pd alloy nanoparticles supported on MIL-101(Cr) as highly efficient catalysts for selective hydrogenation of 1,3-butadiene

et al. 2020

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Bimetallic Au–Ni alloy nanoparticles in a metal–organic framework (MIL-101) as efficient heterogeneous catalysts for selective oxidation of benzyl alcohol into benzaldehyde

Cited by 51 publications

References 61 publications

Heterogeneous Bimetallic Cu–Ni Nanoparticle-Supported Catalysts in the Selective Oxidation of Benzyl Alcohol to Benzaldehyde

Heterogeneous Bimetallic Cu–Ni Nanoparticle-Supported Catalysts in the Selective Oxidation of Benzyl Alcohol to Benzaldehyde

Boosting Visible‐Light Photocatalytic Performance for CO₂ Reduction via Hydroxylated Graphene Quantum Dots Sensitized MIL‐101(Fe)

Bimetallic Au–Pd alloy nanoparticles supported on MIL-101(Cr) as highly efficient catalysts for selective hydrogenation of 1,3-butadiene

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Bimetallic Au–Ni alloy nanoparticles in a metal–organic framework (MIL-101) as efficient heterogeneous catalysts for selective oxidation of benzyl alcohol into benzaldehyde

Cited by 51 publications

References 61 publications

Heterogeneous Bimetallic Cu–Ni Nanoparticle-Supported Catalysts in the Selective Oxidation of Benzyl Alcohol to Benzaldehyde

Heterogeneous Bimetallic Cu–Ni Nanoparticle-Supported Catalysts in the Selective Oxidation of Benzyl Alcohol to Benzaldehyde

Boosting Visible‐Light Photocatalytic Performance for CO2 Reduction via Hydroxylated Graphene Quantum Dots Sensitized MIL‐101(Fe)

Bimetallic Au–Pd alloy nanoparticles supported on MIL-101(Cr) as highly efficient catalysts for selective hydrogenation of 1,3-butadiene

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Boosting Visible‐Light Photocatalytic Performance for CO₂ Reduction via Hydroxylated Graphene Quantum Dots Sensitized MIL‐101(Fe)