A highly selective and efficient Pd/Ni/Ni(OH)2/C catalyst for furfural hydrogenation at low temperatures

Ruan, Luna; Zhang, Huan; Zhou, Man; Zhu, Lihua; Pei, An; Wang, Jiexiang; Yang, Kai; Zhang, Chuanqun; Xiao, Suqun; Chen, Bing Hui

doi:10.1016/j.mcat.2019.110639

Cited by 21 publications

(13 citation statements)

References 58 publications

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“…The intermediates were not easy to capture due to the rapid reaction, so we performed an experiment at low rate, which was carried out at 80 °C for 30 min. 40 In addition to the substances that appeared in the previous reaction with a low conversion, we also detected 2-cyclopentenozane, showing that they are in an unstable state in reaction. Based on previous reports and some detected intermediates, the proposed mechanism of the hydrogenation of furfural over Ni 3 Co 1 /ELAC was presented in Scheme 2 .…”

Section: Resultssupporting

confidence: 50%

Efficient conversion of furfural to cyclopentanol over lignin activated carbon supported Ni–Co catalyst

Guo

Hou

2022

RSC Adv.

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Section: Resultssupporting

confidence: 50%

Efficient conversion of furfural to cyclopentanol over lignin activated carbon supported Ni–Co catalyst

Guo

Hou

2022

RSC Adv.

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“…There are two strong peaks at 780.2 and 796.1 eV which confirm the presence of mixed oxidation states to Co 2p 3/2 (Co 3+ ) and Co 2p 1/2 (Co 2+ ), respectively, and the spin energy separation is 15.9 eV . Likewise, the Ni 2p spectrum (Figure (b)) shows two strong peaks at 854.9 and 872.4 eV, which correspond to Ni 2p 3/2 (Ni 3+ ) and Ni 2p 1/2 (Ni 2+ ), respectively, and the spin energy separation is 17.5 eV. − The peaks at 160.8 eV (S 2p 3/2 ) and 167.8 eV (S 2p 1/2 ) correspond to the S 2p (Figure (c)). As presented in Figure (d), four peaks are observed at 283.6, 285.5, 287.5, and 289.4 eV, which are attributed to sp 2 C in graphene, sp 3 in C–C, C–O, and CO from carbonyls and carboxylates (COOH), respectively .…”

Section: Resultsmentioning

confidence: 81%

Graphene Quantum Dots Embedded in NiCo₂S₄/MWCNT Nanocomposite as a Promising Candidate for Supercapacitors and I₃^– Reduction in Dye-Sensitized Solar Cells

et al. 2021

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Nickel Cobalt Sulfide (NCS) along with Graphene Quantum Dots (GQDs) and Multiwalled Carbon Nanotubes (MWCNTs) are used here for the Counter Electrode (CE) to replace the conventional Pt in a Dye-Sensitized Solar Cell (DSSC). The usefulness of this system in the design of supercapacitors is also investigated. Various analytical tools are used to explore the crystallinity, morphology, and valence states of the synthesized nanocomposites. A short circuit current (J SC ) of 11.57 mA/cm 2 , an open-circuit voltage (V OC ) of 0.74 V, and a power conversion efficiency (PCE) of 5.84% are achieved for GQDs embedded NCS/MWCNT nanocomposite which is 39% higher compared to the pristine NCS (3.52%). The obtained PCE is compared with the standard Pt CE (∼6.88%) based DSSCs. Besides, cyclic voltammetry and galvanostatic charge−discharge characteristics are also done to study the supercapacitor performance. The specific capacitance of 448 F/g and 361 F/g at 2 A/g have been achieved with and without a GQDs implanted NCS/MWCNT nanostructure. This research suggests that GQDs implanted NCS/MWCNT is not only a Pt-free DSSC replacement but also has storage capability.

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“…The binding energy values as well as the percentage of the species are shown in Table 5. The existence of the Ni 3+ species can be explained by the formation of a nickel spinel NiAl 2 O 4 according to the energy values in 856.2-856.6 eV [110,111] as reported by Ruan and Zhang et al [112,113]. On the other hand, the signal at 856 eV can be associated with the existence of Ni 3+ species; therefore, the existence of three Ni species (Ni 3+ , Ni 2+ , and Ni 0 ) can be seen.…”

Section: Ftir-pyridinementioning

confidence: 77%

γ-Valerolactone Production from Levulinic Acid Hydrogenation Using Ni Supported Nanoparticles: Influence of Tungsten Loading and pH of Synthesis

et al. 2022

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γ-Valerolactone (GVL) has been considered an alternative as biofuel in the production of carbon-based chemicals; however, the use of noble metals and corrosive solvents has been a problem. In this work, Ni supported nanocatalysts were prepared to produce γ-Valerolactone from levulinic acid using methanol as solvent at a temperature of 170 °C utilizing 4 MPa of H2. Supports were modified at pH 3 using acetic acid (CH3COOH) and pH 9 using ammonium hydroxide (NH4OH) with different tungsten (W) loadings (1%, 3%, and 5%) by the Sol-gel method. Ni was deposited by the suspension impregnation method. The catalysts were characterized by various techniques including XRD, N2 physisorption, UV-Vis, SEM, TEM, XPS, H2-TPR, and Pyridine FTIR. Based on the study of acidity and activity relation, Ni dispersion due to the Lewis acid sites contributed by W at pH 9, producing nanoparticles smaller than 10 nm of Ni, and could be responsible for the high esterification activity of levulinic acid (LA) to Methyl levulinate being more selective to catalytic hydrogenation. Products and by-products were analyzed by 1H NMR. Optimum catalytic activity was obtained with 5% W at pH 9, with 80% yield after 24 h of reaction. The higher catalytic activity was attributed to the particle size and the amount of Lewis acid sites generated by modifying the pH of synthesis and the amount of W in the support due to the spillover effect.

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A highly selective and efficient Pd/Ni/Ni(OH)2/C catalyst for furfural hydrogenation at low temperatures

Cited by 21 publications

References 58 publications

Efficient conversion of furfural to cyclopentanol over lignin activated carbon supported Ni–Co catalyst

Efficient conversion of furfural to cyclopentanol over lignin activated carbon supported Ni–Co catalyst

Graphene Quantum Dots Embedded in NiCo₂S₄/MWCNT Nanocomposite as a Promising Candidate for Supercapacitors and I₃^– Reduction in Dye-Sensitized Solar Cells

γ-Valerolactone Production from Levulinic Acid Hydrogenation Using Ni Supported Nanoparticles: Influence of Tungsten Loading and pH of Synthesis

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A highly selective and efficient Pd/Ni/Ni(OH)2/C catalyst for furfural hydrogenation at low temperatures

Cited by 21 publications

References 58 publications

Efficient conversion of furfural to cyclopentanol over lignin activated carbon supported Ni–Co catalyst

Efficient conversion of furfural to cyclopentanol over lignin activated carbon supported Ni–Co catalyst

Graphene Quantum Dots Embedded in NiCo2S4/MWCNT Nanocomposite as a Promising Candidate for Supercapacitors and I3– Reduction in Dye-Sensitized Solar Cells

γ-Valerolactone Production from Levulinic Acid Hydrogenation Using Ni Supported Nanoparticles: Influence of Tungsten Loading and pH of Synthesis

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Graphene Quantum Dots Embedded in NiCo₂S₄/MWCNT Nanocomposite as a Promising Candidate for Supercapacitors and I₃^– Reduction in Dye-Sensitized Solar Cells