Facile synthesis of CoSi alloy catalysts with rich vacancies for base- and solvent-free aerobic oxidation of aromatic alcohols

Zhao, Zhiyue; Jiang, Zhiwei; Huang, Yizhe; Boubeche, Mebrouka; Matveeva, Valentina G.; Garcés, Hector F.; Luo, H.; Yan, Kai

doi:10.1016/s1872-2067(23)64418-3

Cited by 9 publications

(4 citation statements)

References 45 publications

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“…4,5 The hydrogenation of benzoic acid (BA) is the most widely applied way to obtain CCA. 6,7 Combined with the biomass-based synthesis of BA, 8,9 the BA selective hydrogenation has also gained continuing interest in biomass upgrading. Heterogenous catalysts based on noble metals such as Rh, 10 Pd, 11 Pt, 12 Ru, 3,13 and Ir 14 have been reported to obtain CCA with high yield for the hydrogenation of BA in previous literature.…”

Section: Introductionmentioning

confidence: 99%

Selective hydrogenation of benzoic acid over bimetallic NiCo embedded in N‐doped carbon

Hu,

Xu,

Zeng

et al. 2023

AIChE Journal

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The selective hydrogenation of biomass‐derived benzoic acid (BA) to cyclohexane carboxylic acid (CCA) is vital to producing fine chemicals from renewable sources. Herein, a novel nitrogen‐doped carbon supported bimetallic catalyst (Ni1Co1/NC) was synthesized via a PVP‐assisted method to catalyze the selective hydrogenation of BA to CCA. Compared with the non‐doped Ni1Co1/C and single counterparts, Ni1Co1/NC exhibited a substantially enhanced activity, with 98.1% yield of CCA. The excellent performance was attributed to the NiCo synergistic effect and N‐doped thin carbon layer, which could increase the total proportion of Ni0 and Co0 species via donating electrons to Co and thus improve the H2 adsorption capacity, the hydrogenation activity of aromatic rings in BA and the stability. This work demonstrates a synergetic effect between NiCo bimetal and N‐doped thin carbon layer. This would pave the way for the rational design and synthesis of high‐performance non‐noble catalysts used in BA hydrogenation.

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Section: Introductionmentioning

confidence: 99%

Selective hydrogenation of benzoic acid over bimetallic NiCo embedded in N‐doped carbon

Hu,

Xu,

Zeng

et al. 2023

AIChE Journal

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“…Based on the dual verification results of cyclic stability testing and filtration experiments mentioned above, we can conclude that HEO-600 exhibits excellent structural stability. In order to further demonstrate the exceptional activity of HEO-600 (the BZH yield up to 92.3% within 1 h), it is utilized to compare with previously reported catalysts, containing noble and transitional metals (Figure b). − The results show that HEO-600 demonstrates comparable or even higher activity than noble metal catalysts (such as Au 1 /CeO 2 , Au–Pd/TiO 2 , and Au@Sph.O in Table S3). This indicates that HEO-600 not only possesses excellent structural stability but also provides outstanding catalytic performance compared with previously investigated noble and non-noble metal-based catalysts, which may originate from the unique flower-like morphology and abundant oxygen vacancies utilizing the oxygen defect engineering tactic.…”

Section: Resultsmentioning

confidence: 97%

Flowerlike Nanosheet-Based High-Entropy Oxides as Catalysts for Aerobic Oxidation of Benzyl Alcohol

Zhang,

Chen,

et al. 2023

ACS Appl. Nano Mater.

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Aerobic oxidation of benzyl alcohol (BAL) under ambient reaction conditions is a charming goal for the fabrication of high-value oxygenates. However, competent catalysts are presently lacking. Herein, we present a flower-like high entropy oxide (HEO) nanosheet with rich oxygen vacancies for the BAL oxidation by utilizing the high-entropy metal organic framework (HE-MOF) as a precursor. Collective characterizations indicate that the substantial OV and massive pores of HEO facilitate substrate activation, promote mass transfer, and enhance catalytic efficiency. Both experimental results and density functional theory (DFT) simulations clearly illustrate the promoting role of OV in the process for reactant activation, thus significantly contributing to the formation of active oxygen species and driving subsequent oxidation more feasible. This work shines light on structural microenvironmental regulation induced via oxygen-vacancy defect engineering to realize superior selective oxidation catalysis.

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“…Our findings indicate that substrates with −OCH 3 groups at the ortho, meta, and para positions were efficiently converted to their corresponding aldehyde products, with yields ranging from 83.5% to greater than 99.9% (entries 1−3), following a reactivity trend of para > ortho > meta substitution patterns. 63,64 The observed variations in reactivity can be attributed to the influence of the substituent group's position. Furthermore, for aromatic alcohols containing heteroatoms (entries 4 and 5), an appropriate increase in reaction time resulted in improved product yields.…”

Section: Aerobic Oxidation Of Other Benzyl Alcoholsmentioning

confidence: 99%

Ceria Nanoparticles on Modified MXene for Aerobic Oxidation of 4-Methoxybenzyl Alcohol

Xie,

Dou,

Huang

et al. 2024

ACS Appl. Nano Mater.

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The development of efficient and robust metal nanoparticle catalysts for the aerobic oxidation of benzyl alcohol is crucial for advancing green chemistry. This study presents a class of ceria nanoparticle catalysts, designated as Ce-NC/CFMX-T, where "T" denotes the pyrolysis temperature. These catalysts are synthesized by pyrolyzing a mixture of Ce-MOF-801/CFMX and dicyandiamide at high temperatures, aimed at the liquid-phase aerobic oxidation of 4-methoxybenzyl alcohol to 4methoxybenzaldehyde, using molecular oxygen as the oxidizing agent and avoiding harmful additives or bases. Among the synthesized catalysts, Ce-NC/CFMX-973 exhibited exceptional catalytic efficiency, achieving over 99.9% conversion of 4methoxybenzyl alcohol and complete selectivity for 4-methoxybenzaldehyde. This performance was achieved under moderate conditions, using xylene as the solvent at 373 K over 8 h and an oxygen pressure of 1 atm. Kinetic analysis revealed that the activation energy for oxidizing 4-methoxybenzyl alcohol using Ce-NC/CFMX-973 was 68.5 ± 3.0 kJ/mol, which is lower than the values observed for Ce-C/CFMX-973, Ce-NC-973, and Ce-C-973. The remarkable catalytic performance of the Ce-NC/CFMX-973 catalyst is attributed to the synergistic effects between CeO 2 nanoparticles and oxygen vacancies, along with the support's balanced acidity and basicity properties.

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Facile synthesis of CoSi alloy catalysts with rich vacancies for base- and solvent-free aerobic oxidation of aromatic alcohols

Cited by 9 publications

References 45 publications

Selective hydrogenation of benzoic acid over bimetallic NiCo embedded in N‐doped carbon

Selective hydrogenation of benzoic acid over bimetallic NiCo embedded in N‐doped carbon

Flowerlike Nanosheet-Based High-Entropy Oxides as Catalysts for Aerobic Oxidation of Benzyl Alcohol

Ceria Nanoparticles on Modified MXene for Aerobic Oxidation of 4-Methoxybenzyl Alcohol

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