Role of the metal-support interface in the hydrodeoxygenation reaction of phenol

Teles, Camila A.; Rabelo‐Neto, Raimundo C.; Duong, Nhung; Quiroz, Jhon; Camargo, Pedro H. C.; Jacobs, Gary; Resasco, Daniel E.; Noronha, Fábio B.

doi:10.1016/j.apcatb.2020.119238

Cited by 47 publications

(24 citation statements)

References 67 publications

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“…Recently, our group investigated the effect of interfacial sites between Pd particles and NbO x species dispersed on silica. 24 Pd-Nb 2 O 5 /SiO 2 with different niobium loadings (Nb/ Pd molar ratio varying between 0.5 and 10) was tested in the HDO of phenol in the gas phase. Important differences in activity and selectivity to the deoxygenated product benzene were observed depending on the presence of niobium oxide close to the Pd particles, revealing the dependence of the HDO activity on the metal-oxophilic site interface.…”

Section: Introductionmentioning

confidence: 99%

Evidence of dependence between the deoxygenation activity and metal–support interface

Teles

Duong

Rabelo‐Neto

et al. 2022

Catal. Sci. Technol.

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Section: Introductionmentioning

confidence: 99%

Evidence of dependence between the deoxygenation activity and metal–support interface

Teles

Duong

Rabelo‐Neto

et al. 2022

Catal. Sci. Technol.

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“…[ 2 ] Unfortunately, excessive oxygen content exists in crude bio‐oil obtained, which requires further catalytic upgrading by reducing the oxygen content to enhance the caloricity and stability [1e,2b,3] . Therefore, it is necessary to apply hydrodeoxygenation (HDO) technology to improve the quality of bio‐oil fuel and meet the requirements of existing equipment [2b,4] …”

Section: Introductionmentioning

confidence: 99%

“…HDO reactions are typically performed in the presence of a heterogeneous catalyst to break the CO bond and unsaturated CC bond, in which catalysts are very necessary in the reduction of oxygen content. [ 4,5 ] Vanillin derived from pyrolysis oil has been investigated intensively as a typical biomass model molecule in HDO with the assistance of related catalysts. [ 6 ] To realize efficient catalytic performance, various efficient catalysts such as Pd 9 Ag 1 /BA‐M, [ 7 ] Pd 9 Ag 1 /N‐BB, [ 8 ] Cu/Zn 15 Al 4 Sn 1 ‐LDH, [ 9 ] CoNi/Al 2 O 3 ‐2, [ 10 ] and Pd/Al 2 O 3 [ 11 ] have been reported for vanillin HDO.…”

Section: Introductionmentioning

confidence: 99%

Defective N‐Doped Carbon Nanospheres Anchored Pd for Selective Hydrodeoxygenation of Bio‐Models under Mild Conditions

Zhang

2022

Energy Tech

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Hydrodeoxygenation (HDO) is of great significance in converting biomass into high value‐added chemicals under mild conditions. However, the design of effective catalysts remains challenge. Herein, a N‐doped carbon nanospheres–supported Pd catalyst for mild vanillin HDO is designed by defect‐enhancement engineering using in situ synthesis. According to the characterization results, the degree of defects is enhanced on the in situ N‐doped carbon spheres (CAFR) with 3‐aminophenol as nitrogen source, which is related to the higher content of pyridine nitrogen. The Pd/CAFR with the most degree of defects exhibits excellent catalytic performance (99.8% of 2‐methoxy‐4‐methylphenol yield) at 50 °C. The plentiful defects act as active sites for anchoring Pd nanoparticles (NPs) to promote uniform dispersion. Meanwhile, the highly dispersed Pd NPs are coordinated with abundant defects through strong metal‐support interaction to increase the content of reduced Pd NPs, which improves the catalytic activity under mild conditions. Moreover, the optimal Pd/CAFR catalyst shows favorable recyclability after five cycles. The defect‐enhancement engineering on carbon materials by in situ N‐doping provides a new idea for support modification of high‐efficiency catalysts under mild conditions.

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“…The catalysts used in HDO include conventional hydrodesulfurization (HDS) catalysts (e.g., CoMo and NiMo sulfides), ,, hydrogenation catalysts (e.g., Pt series precious metals and Ni-based), ,,− zeolites, − metal oxides, − and metal phosphates, , etc. The operating conditions vary with the types of catalysts.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Insight into the Hydrodeoxygenation of Hydroquinone over Au/a-TiO₂ Catalyst

et al. 2021

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The mechanism and kinetic features of hydrodeoxygenation of hydroquinone over the oxygen-defective anatase (a-TiO 2 ) supported gold (Au) catalyst were studied by density functional theory calculations. The investigation of reaction pathways and energetics identified that the conversion of hydroquinone over Au 10 /a-TiO 2 (001) went through several key reaction intermediates including benzoquinone, 1,4-cyclohexanediol, and cyclohexanol. The dehydrogenation of hydroquinone to benzoquinone intermediate occurred via H-transfer on both the TiO 2 surface and Au cluster. Subsequent hydrogenation of the C C bonds of benzoquinone mainly occurs from H*−Au sites, which has relatively low barriers, indicating the facile formation of ringsaturated species. The "1,4-cyclohexanediol" pathway dominates the overall reaction in hydroquinone conversion with favorable kinetic feature due to low barriers, leading to a large amount of cyclohexane in the product. The presence of oxygen vacancies on the a-TiO 2 (001) surface is critically important as active sites to facilitate the cleavage of C−O bond of intermediate species. The interface of Au−TiO 2 also plays an important role in stabilizing reaction intermediates and promoting the H transfer between Au cluster and the adsorbed species on the TiO 2 surface.

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Role of the metal-support interface in the hydrodeoxygenation reaction of phenol

Cited by 47 publications

References 67 publications

Evidence of dependence between the deoxygenation activity and metal–support interface

Evidence of dependence between the deoxygenation activity and metal–support interface

Defective N‐Doped Carbon Nanospheres Anchored Pd for Selective Hydrodeoxygenation of Bio‐Models under Mild Conditions

Mechanistic Insight into the Hydrodeoxygenation of Hydroquinone over Au/a-TiO₂ Catalyst

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Role of the metal-support interface in the hydrodeoxygenation reaction of phenol

Cited by 47 publications

References 67 publications

Evidence of dependence between the deoxygenation activity and metal–support interface

Evidence of dependence between the deoxygenation activity and metal–support interface

Defective N‐Doped Carbon Nanospheres Anchored Pd for Selective Hydrodeoxygenation of Bio‐Models under Mild Conditions

Mechanistic Insight into the Hydrodeoxygenation of Hydroquinone over Au/a-TiO2 Catalyst

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Mechanistic Insight into the Hydrodeoxygenation of Hydroquinone over Au/a-TiO₂ Catalyst