2018
DOI: 10.1002/slct.201802490
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One‐step Modification of Active Sites and Support in Ni/Al2O3 Catalyst for Hydrodeoxygenation of Lignin‐derived Diphenyl Ether

Abstract: A bifunctional Ni2Si/SiO2‐Al2O3 catalyst was prepared by one‐step chemical vapor deposition (CVD), and used for hydrode‐oxygenation (HDO) of diphenyl ether (DPE). During the one‐step CVD process, metallic Ni species as the HDO active sites were isolated by intermetallic modification of Si atoms and partial electron transferred from Ni to Si, as inferred by XRD, XPS, and theoretical calculation. Furthermore, the characterization results revealed that the acidity and structure of Al2O3 were tuned due to the form… Show more

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Cited by 15 publications
(6 citation statements)
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“…On the contrary, only a residual signal is found for Fe wool@Ni, likely coming from Si−O−Al contamination at the sample holder surface. 36 As anticipated for a sample exposed to air before XPS analysis, oxidized nickel accompanies a distinctive Ni 2p 3/2 signal at ∼852.3 eV, corresponding to metallic Ni, 37 in both samples. This interpretation is also in good agreement with the O 1s peak fitting analysis (see Figure S10 The magnetization measurements with respect to the magnetic field were carried out at 300 K for the raw Fe wool and the functionalized one (Figure S11, SI).…”
Section: ■ Experimental Sectionsupporting
confidence: 60%
“…On the contrary, only a residual signal is found for Fe wool@Ni, likely coming from Si−O−Al contamination at the sample holder surface. 36 As anticipated for a sample exposed to air before XPS analysis, oxidized nickel accompanies a distinctive Ni 2p 3/2 signal at ∼852.3 eV, corresponding to metallic Ni, 37 in both samples. This interpretation is also in good agreement with the O 1s peak fitting analysis (see Figure S10 The magnetization measurements with respect to the magnetic field were carried out at 300 K for the raw Fe wool and the functionalized one (Figure S11, SI).…”
Section: ■ Experimental Sectionsupporting
confidence: 60%
“…In addition, the positively charged Ga improves the conversion of dimethyl ether by adsorbing oxygen from the CAr–OCH 3 bonds, which allows the activated CAr–OCH 3 bonds to be directly cleaved by the attack of hydrogen atoms on the neighboring Ni. Likewise, in the ordered Ni 2 Si IMC for the diphenyl ether HDO reaction, the incorporation of Si atoms plays a crucial role in improving the catalytic performance of the catalysts . On the one hand, the formation of Al–O–Si bonds increases the number of acid sites of the Ni 2 Si/SiO 2 –Al 2 O 3 intermetallic nanocatalyst; on the other hand, the sequestration effect of the Si element on active groups and the electron transfer between Ni and Si atoms will reduce both H 2 and the activation ability of aromatic rings, thereby improving the selectivity and catalytic activity of the oxygen-free products.…”
Section: Intermetallic Nanocatalysts For Biomass Upgradingmentioning
confidence: 99%
“…Likewise, in the ordered Ni 2 Si IMC for the diphenyl ether HDO reaction, the incorporation of Si atoms plays a crucial role in improving the catalytic performance of the catalysts. 71 On the one hand, the formation of Al−O−Si bonds increases the number of acid sites of the Ni 2 Si/SiO 2 −Al 2 O 3 intermetallic nanocatalyst; on the other hand, the sequestration effect of the Si element on active groups and the electron transfer between Ni and Si atoms will reduce both H 2 and the activation ability of aromatic rings, thereby improving the selectivity and catalytic activity of the oxygen-free products. Therefore, the Ni 2 Si IMC has better catalytic performance than the monometallic Ni catalyst in the HDO reaction of diphenyl ether.…”
Section: Intermetallic Nanocatalysts For Biomass Upgradingmentioning
confidence: 99%
“…In addition, the single-phase Ni 2 Si/SiO 2 -Al 2 O 3 catalyst has been designed by interstitial modification with earth-abundant silicon, in one-step chemical vapor deposition. The metal active sites and the acid properties of support has been tuned, enhancing the stability and the selectivity towards the HDO of lignin-derived aryl ethers to renewable bio-oils [149]. Therefore, the development of green, high efficiency, and stable catalysts through designing of metal activity sites and tuning the acid of support is the key factor in future research of the nickel catalytic transformation of lignin.…”
Section: Conclusion and Future Prospectmentioning
confidence: 99%