Improved Pd/Ru metal supported graphene oxide nano-catalysts for hydrodeoxygenation (HDO) of vanillyl alcohol, vanillin and lignin

Arora, Shalini; Gupta, Neeraj; Singh, Vasundhara

doi:10.1039/d0gc00052c

Cited by 53 publications

(23 citation statements)

References 46 publications

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“…It is generally believed that as the content of Pd 0 increases, the amount of metal active sites exposed on the catalyst surface increases, and the catalyst activity will gradually increase. [ 32,36 ] Remarkably, we observed that the defect degree and Pd 0 content on the surface of the catalyst exhibited similar trends with the MMP selectivity (Figure 4d). As shown in Figure 4d, the best catalytic activity was obtained over Pd/CAFR in 1 h at 50 °C.…”

Section: Catalytic Performance Of Catalystssupporting

confidence: 59%

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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Section: Catalytic Performance Of Catalystssupporting

confidence: 59%

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

Zhang

2022

Energy Tech

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“…5c). Compared to other metal catalysts previously reported, 13,16,[45][46][47][48][49][50][51] our present Ni 3 Co@NC@C catalyst exhibits a better or comparable catalytic performance in the aqueous phase HDO of vanillin (Table S1 †), and TOF values, even under mild reaction conditions.…”

Section: Paper Dalton Transactionsmentioning

confidence: 60%

Robust MOF-derived carbon-supported bimetallic Ni–Co catalysts for aqueous phase hydrodeoxygenation of vanillin

et al. 2022

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“…The high number of oxygen-donor anchoring groups facilitates the immobilization and enhances the adsorption performance of metal catalysts [ 58 , 59 , 60 ]. Use of graphene oxide as a support has been reported in catalytic processes such as water or oxygen reduction reactions, coupling reactions, hydrodeoxygenation reactions, and, among other biomass conversion reactions [ 61 , 62 , 63 ]. Previous works have shown that the covalent grafting of {Mo 6 Br i 8 } 4+ cluster core complexes on the surface of GO sheets enhances the stability of the cluster active sites for catalytic reactions to afford good catalysts for hydrogen generation from water [ 36 ], carbon dioxide transformations into valuable chemicals [ 34 , 64 ], and degradation of organic pollutants [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity and Stability in Hydrogen Evolution of Mo6 Iodide Clusters Supported on Graphene Oxide

et al. 2020

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Catalytic properties of the cluster compound (TBA)2[Mo6Ii8(O2CCH3)a6] (TBA = tetrabutylammonium) and a new hybrid material (TBA)2Mo6Ii8@GO (GO = graphene oxide) in water photoreduction into molecular hydrogen were investigated. New hybrid material (TBA)2Mo6Ii8@GO was prepared by coordinative immobilization of the (TBA)2[Mo6Ii8(O2CCH3)a6] onto GO sheets and characterized by spectroscopic, analytical, and morphological techniques. Liquid and, for the first time, gas phase conditions were chosen for catalytic experiments under UV–Vis irradiation. In liquid water, optimal H2 production yields were obtained after using (TBA)2[Mo6Ii8(O2CCH3)a6] and (TBA)2Mo6Ii8@GO) catalysts after 5 h of irradiation of liquid water. Despite these remarkable catalytic performances, “liquid-phase” catalytic systems have serious drawbacks: the cluster anion evolves to less active cluster species with partial hydrolytic decomposition, and the nanocomposite completely decays in the process. Vapor water photoreduction showed lower catalytic performance but offers more advantages in terms of cluster stability, even after longer radiation exposure times and recyclability of both catalysts. The turnover frequency (TOF) of (TBA)2Mo6Ii8@GO is three times higher than that of the microcrystalline (TBA)2[Mo6Ii8(O2CCH3)a6], in agreement with the better accessibility of catalytic cluster sites for water molecules in the gas phase. This bodes well for the possibility of creating {Mo6I8}4+-based materials as catalysts in hydrogen production technology from water vapor.

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Improved Pd/Ru metal supported graphene oxide nano-catalysts for hydrodeoxygenation (HDO) of vanillyl alcohol, vanillin and lignin

Abstract: Ru@GO and Pd/Ru@GO as hydrodeoxygenation (HDO) catalysts, forming p-creosol from vanillin, vanillyl alcohol and lignin after photo-catalytic fragmentation under mild conditions.

Cited by 53 publications

References 46 publications

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

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

Robust MOF-derived carbon-supported bimetallic Ni–Co catalysts for aqueous phase hydrodeoxygenation of vanillin

Enhanced Photocatalytic Activity and Stability in Hydrogen Evolution of Mo6 Iodide Clusters Supported on Graphene Oxide

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