A novel PdNi/Al2O3 catalyst prepared by galvanic deposition for low temperature methane combustion

Pan, Xiqiang; Zhang, Yibo; Miao, Zhenzhen; Yang, Xiaojing

doi:10.1016/s2095-4956(13)60080-7

Cited by 46 publications

(33 citation statements)

References 36 publications

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“…It can be concluded whether it is Ni 2 O 3 or not, from the satellite peak at 867 eV. However, the presence of Ni 2 O 3 may be ruled out from the absence of satellite peak at 867 eV which is characteristic of Ni 2 O 3 ,, and this is further supported by XRD analysis which did not show any Ni 2 O 3 phase. A shift in binding energy of Ni 2p towards higher value with increase in Al 3+ content is observed.…”

Section: Resultsmentioning

confidence: 56%

Ni‐Al‐Ti Hydrotalcite Based Catalyst for the Selective Hydrogenation of Biomass‐Derived Levulinic Acid to γ‐Valerolactone

et al. 2019

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NiÀ Al-Ti mixed oxide derived from NiÀ Al-Ti hydrotalcite precursor is identified as an efficient catalyst for the hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL). This catalyst showed high active surface Ni sites due to a higher synergy in the mixed oxide formed from the hydrotalcite precursor. These results are further supported by X-ray diffraction analysis (XRD), electron spin resonance spectroscopy (ESR) and scanning electron microscopy (SEM) results. The higher activity of NiÀ Al-Ti compared to NiÀ Al, NiÀ Ti catalysts was attributed to a high ratio of Lewis to Brønsted acid sites (LAS/BAS) observed from pyridine adsorption -DRIFTS results along with high surface Ni sites on the catalyst surface measured from CO-chemisorption studies. This contributed to the enhanced selectivity of the desired product, GVL over NiÀ Al-Ti catalyst as compared to its individual counter parts, NiÀ Ti and NiÀ Al catalysts.[a] R.

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Section: Resultsmentioning

confidence: 56%

Ni‐Al‐Ti Hydrotalcite Based Catalyst for the Selective Hydrogenation of Biomass‐Derived Levulinic Acid to γ‐Valerolactone

et al. 2019

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“…The R-Ni x Ag catalysts were prepared similarly according to am ethod described elsewhere. [64,65] Briefly,c ommercial R-Ni (Da Cheng Co.,Ltd, China) was pretreated at 260 8Cfor 2hin aflowing 5% H 2 /Ar mixture (> 99.99 %, Changchun Juyang Gas Co.,L td, China), before the addition of appropriate amounts of AgNO 3 (A.R., Sinopharm Chemical Reagent Co.,L td, China) in deionized water to reduced R-Ni under aN 2 atmosphere (> 99.999 %, Changchun Juyang Gas Co.,L td, China), and subsequent heating in a1 00 mL stainless-steel autoclave with an inner Te flon coating to 150 8Cf or 2h.A fter reaction, the solvent was removed by centrifugation. The catalyst was then washed and stored under deionized water.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Bimetallic Effects of Silver‐Modified Nickel Catalysts and their Synergy in Glycerol Hydrogenolysis

Chen

Zhang

et al. 2016

ChemCatChem

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A series of Ag‐modified Ni catalysts was prepared, and the role of bimetallic effects on the selective cleavage of C−O and C−C bonds was investigated in glycerol hydrogenolysis, a model reaction for the utilization of biomass‐derived polyols. Compared to Raney Ni, the optimal Raney Ni6Ag catalyst was more active in glycerol conversion and efficient for C−O bond cleavage to afford a higher selectivity toward C3 products (1,2‐propanediol and lactic acid; 88 %) at the same ∼70 % conversion of glycerol, especially 1,2‐propanediol (73 %). On Ni catalysts, the hydrogenation of adsorbed species was the most likely rate‐limiting step in glycerol hydrogenolysis under alkaline conditions. The Ag additive enhanced the hydrogenation ability of Ni catalysts, which should be related to the higher strength of the adsorption of hydrogen and the lower strength of the adsorption of substrates on Ni sites because of the formation of Ni‐Ag alloys. A mechanistic interpretation was presented for the excellent catalytic behavior.

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“…19,35,36 Accordingly, the reducibility of PdO was investigated by O 2 -temperature programmed desorption (O 2 -TPD) after the oxidation of catalysts in a flow of O 2 at 500°C for 30 min as shown in Fig. 21 The peak of Pd/Co/Al 2 O 3 -GD was observed at 677°C, which is a lower temperature than those of Pd/Al 2 O 3 -I and Pd/Co/Al 2 O 3 -SI. The peaks between 650°C and 800°C were attributed to oxygen desorption from PdO.…”

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confidence: 99%

Enhanced activity for methane combustion over a Pd/Co/Al₂O₃ catalyst prepared by a galvanic deposition method

Mahara

Ohyama

Tojo

et al. 2016

Catal. Sci. Technol.

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catalyst prepared by a galvanic deposition method exhibited notable catalytic activity for methane combustion, due to the higher reducibility of PdO nanoparticles on CoO x .Methane combustion has become increasingly important as a method for emission reduction of automotive exhaust gases. 1-3 It is well-known that methane has a global warming potential 23 times higher than that of CO 2 ; therefore, unburned methane should be oxidized to CO 2 and H 2 O.Supported palladium (Pd) catalysts have been utilized recently for methane combustion. In particular, the alumina-supported Pd (Pd/Al 2 O 3 ) catalyst has received special attention due to its high catalytic activity and thermal stability. However, their catalytic activities are still insufficient at lower temperature. To obtain catalysts with higher activity, the additive effect on Pd/Al 2 O 3 has been investigated. Widjaja and co-workers examined MO x (M = Co, Cr, Cu, Fe, Mn and Ni) promoted Pd/Al 2 O 3 catalysts and reported that Ni and Co were effective for promotion of methane combustion. 28 Liu and co-workers investigated the effect of metal oxides on Pd/ Al 2 O 3 catalysts and reported that the formation of NiAl 2 O 4 and MgAl 2 O 4 spinel phases would be beneficial for the methane catalytic performance. 31,32 Recently, Cargnello et al. reported that the Pd core and CeO 2 shell deposited onto modified hydrophobic alumina displayed high methane combustion activity due to an increase of metal-support interface. 7 To improve the catalytic performance of Pd/Al 2 O 3 , it is crucial to precisely control the interface between the metal (Pd) and metal oxide (MO x ) on Pd/MO x /Al 2 O 3 .We previously reported that the galvanic deposition method has potential to control the interface of two metal components. 33,34 This method is based on galvanic replace-Catal. Sci. Technol. This journal is

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A novel PdNi/Al2O3 catalyst prepared by galvanic deposition for low temperature methane combustion

Cited by 46 publications

References 36 publications

Ni‐Al‐Ti Hydrotalcite Based Catalyst for the Selective Hydrogenation of Biomass‐Derived Levulinic Acid to γ‐Valerolactone

Ni‐Al‐Ti Hydrotalcite Based Catalyst for the Selective Hydrogenation of Biomass‐Derived Levulinic Acid to γ‐Valerolactone

Bimetallic Effects of Silver‐Modified Nickel Catalysts and their Synergy in Glycerol Hydrogenolysis

Enhanced activity for methane combustion over a Pd/Co/Al₂O₃ catalyst prepared by a galvanic deposition method

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A novel PdNi/Al2O3 catalyst prepared by galvanic deposition for low temperature methane combustion

Cited by 46 publications

References 36 publications

Ni‐Al‐Ti Hydrotalcite Based Catalyst for the Selective Hydrogenation of Biomass‐Derived Levulinic Acid to γ‐Valerolactone

Ni‐Al‐Ti Hydrotalcite Based Catalyst for the Selective Hydrogenation of Biomass‐Derived Levulinic Acid to γ‐Valerolactone

Bimetallic Effects of Silver‐Modified Nickel Catalysts and their Synergy in Glycerol Hydrogenolysis

Enhanced activity for methane combustion over a Pd/Co/Al2O3 catalyst prepared by a galvanic deposition method

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Enhanced activity for methane combustion over a Pd/Co/Al₂O₃ catalyst prepared by a galvanic deposition method