Boron-doped graphene as a metal-free catalyst for gas-phase oxidation of benzyl alcohol to benzaldehyde

Cheng, Wenjun; Liu, Xueting; Li, Na; Han, Jiatong; Yu, Sansan

doi:10.1039/c8ra00290h

Cited by 26 publications

(14 citation statements)

References 58 publications

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“…Figure 1 shows the XRD patterns of catalysts including graphene (G), ferrous oxide (Fe), ferrous oxide doped with graphene (FG), ferrous oxide doped with aluminum (FA), and FAG made from GO, aluminum nitrate, ferric nitrate, and alcohol (Table 2). Pattern (a) shows two broad diffraction peaks at 24.6° (d = 0.34 nm) and 43.0° (d = 0.21 nm) for G. Cheng et al [26] reported an intense and sharp reflection centered at 11° for GO, corresponding to a c-axis interlayer spacing of 0.81 nm [25]. The characteristic peak of GO disappeared since it underwent thermal processing in Ar atmosphere at 1173 K for 2 h, confirming that most of the oxygen-containing functional groups in GO were detached under the supercritical condition with high temperature and high pressure.…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

“…Dynamic study shows that when nitrogen-doped graphene is used as a catalyst, the activation energy of reaction is 56.1 kJ mol −1 , close to one of the traditional noble metal loaded catalyst, 51.4 kJ mol −1 . Cheng et al [26] used boron-doped graphene as a metal-free catalyst in the gasphase oxidation of BA to BD and achieved excellent performance with selectivity of BD of up to 99.2%.…”

Section: Introductionmentioning

confidence: 99%

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Metallic oxide–graphene composites as a catalyst for gas-phase oxidation of benzyl alcohol to benzaldehyde

Cheng

Yan

et al. 2021

SN Appl. Sci.

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A new catalyst (FAG) composed of Fe, Al, and graphene (G) was prepared for catalyzing the reaction of benzyl alcohol (BA) to benzaldehyde (BD). The catalyst was characterized by XRD, XPS, SEM, and BET analyses. The catalytic performance of FAG for oxidation of BA to BD was studied by comparing with the catalysts ferrous oxide (Fe), ferrous oxide doped with aluminum (FA), and ferrous oxide doped with graphene (FG). The effects of amount of graphene additive, temperature, and ratio of Fe and Al were also studied. The results show that the catalyst FAG has a great specific surface area of 80.40 m2 g−1 and an excellent catalytic performance for the reaction of BA to BD: the conversion of BA and yield of BD significantly increased, and the selectivity of BD reached 87.38%.

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Section: Characterization Of Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metallic oxide–graphene composites as a catalyst for gas-phase oxidation of benzyl alcohol to benzaldehyde

Cheng

Yan

et al. 2021

SN Appl. Sci.

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“…3). The peak at 192.5 eV in insensitive lines without B treatment was most likely from B-N and B-C bonds [19,[41][42][43], which indicated that the insensitive lines had incorporated the B into tissues. The observation that insensitive lines incorporated more B directly into root tissues than sensitive lines may be a factor in the reduced susceptibility of insensitive lines to the development of clubroot symptoms.…”

Section: Boron K-edge Xanes Analysismentioning

confidence: 99%

Boron Sensitivity and Storage in Brassica Napus and Its Potential for Clubroot Management

Gossen¹,

Wang

McLean

et al. 2020

Preprint

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Clubroot [Plasmodiophora brassica] severity in canola (Brassica napus) can be suppressed by addition of boron (B), but excess B produces phytotoxicity. However, some lines of a closely related species, B. rapa, are relatively insensitive to high levels of B. Assessment of 150 accessions of B. napus and B. rapa treated with 0, 8 and 16 kg B ha-1 as disodium octaborate tetrahydrate (trade name Solubor) identified several lines that were relatively insensitive to high levels of B. In 2015, 88 lines were planted in a clubroot-infested plot in Ontario, Canada in a replicated split-plot design, where the subplot treatments were 8 kg ha-1 of B versus a non-treated control. Boron-insensitive lines generally had slightly lower clubroot severity than sensitive lines, even in the control with no added B. Application of B reduced clubroot slightly in the most sensitive lines, but produced a large and significant reduction in severity in the most insensitive lines. Assessment of five insensitive lines under controlled conditions supported the observation that application of B substantially reduced clubroot severity in insensitive lines. Comparison of two sensitive and two insensitive lines each of B. napus and B. rapa using Boron K-edge X-ray absorption near-edge structure (XANES) spectra from a synchrotron-based soft-X-ray beamline showed that some insensitive lines were able to extract B efficiently from a soil that contained very low levels of B. The spectra of sensitive and insensitive lines differed when additional B was applied, which demonstrated that the insensitive lines stored B (and other elements such as S and P) differently than the sensitive lines. Differences in the amount and type of storage likely affect the susceptibility to clubroot, and merits further study.

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“…XPS results indicated that the graphitic sp 2 B species (BC 3 ) is the mainly boron dopant species incorporated in the graphene lattice, which could significantly improve the content of the active ketone carbonyl groups (C=O) of catalytic reaction on the graphene and thus lead to significantly improved catalytic activity. As a result, compared to the un‐doped graphene, the conversion of benzyl alcohol over BGs increased 2.35 times and the selectivity of benzaldehyde increased from 77.3 % to 99.2 % . A N‐, O‐, and S‐tridoped nanoporous carbons (NOSCs) have been synthesized via polymerization of pyrrole using (NH 4 ) 2 S 2 O 8 as oxidant by the hard template method.…”

Section: Oxidationmentioning

confidence: 99%

“…As a result, compared to the un-doped graphene, the conversion of benzyl alcohol over BGs increased 2.35 times and the selectivity of benzaldehyde increased from 77.3 % to 99.2 %. [65] A N-, O-, and S-tridoped nanoporous carbons (NOSCs) have been synthesized via polymerization of pyrrole using (NH 4 ) 2 S 2 O 8 as oxidant by the hard template method. In this work, the authors mainly focused on their catalytic activity toward ORR.…”

Section: Alcohols Oxidationmentioning

confidence: 99%

Heteroatom‐Enhanced Metal‐Free Catalytic Performance of Carbocatalysts for Organic Transformations

Shang

Gao

2019

ChemCatChem

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The exploitation and design of metal‐free catalysts for chemical transformation is always a fascinating theme from the prospective of fundamental and applied research. In addition to their distinct advantages such as lower cost, higher biocompatibility and reliability and thus higher sustainability, metal‐free materials often unexpectedly render different reaction pathway or mechanism from conventional metal catalysts. As a consequence, metal‐free catalysts have revolutionized and expanded the platform of catalysis. Among them, carbons are a typical class of nonmetallic materials. To date, a series of elements (e. g., B, N, P or S) as heteroatom dopants have equipped pristine carbons with enhanced performance and even new chemical functionality. It was proposed to attribute to modulated electrical properties and surface physicochemical features originated from structural distortions and changes of charge densities. In this minireview, we overviewed the catalytic application of heteroatom‐doped carbocatalysts in oxidation, oxidative coupling, reduction and hydrogenation reactions with special emphasis on the role of heteroatoms and consequently enhanced performance. This minireview highlights the structure‐activity correlations, thereby directing the rational design of advanced metal‐free catalysts for organic synthesis. Some controversies about active sites and challenges in catalyst design are also discussed here.

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Boron-doped graphene as a metal-free catalyst for gas-phase oxidation of benzyl alcohol to benzaldehyde

Abstract: Boron doped graphene for the oxidative dehydrogenation reactions.

Cited by 26 publications

References 58 publications

Metallic oxide–graphene composites as a catalyst for gas-phase oxidation of benzyl alcohol to benzaldehyde

Metallic oxide–graphene composites as a catalyst for gas-phase oxidation of benzyl alcohol to benzaldehyde

Boron Sensitivity and Storage in Brassica Napus and Its Potential for Clubroot Management

Heteroatom‐Enhanced Metal‐Free Catalytic Performance of Carbocatalysts for Organic Transformations

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