Synthesis and characterization of bimetallic Cu–Ni/ZrO2 nanocatalysts: H2 production by oxidative steam reforming of methanol

Pérez-Hernández, R.; Galicia, Gilberto Mondragón; Anaya, Demetrio Mendoza; Palacios, Javier; Ángeles–Chávez, C.; Arenas-Alatorre, Jesús

doi:10.1016/j.ijhydene.2008.06.019

Cited by 103 publications

(48 citation statements)

References 33 publications

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“…The reduced copper is able to activate and dissociate hydrogen, which can spill-over to, and subsequently reduce, the adjacent nickel oxide crystallite [49]. A similar result was also reported in the TPR experiment on Cu-Ni/ZrO 2 catalyst by Hernández et al [47], who found that the presence of Cu facilitated the reduction of NiO. One point should be drawn here that although the addition of Cu species can decrease the reduction temperature of NiO, the methanation activity of 5Cu-Ni/SiC is not improved.…”

Section: -23 Xpssupporting

confidence: 80%

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The Influence of a Second Metal on the Ni/SiC Catalyst for the Methanation of Syngas

Song¹,

Yu²,

Wang³

et al. 2014

Korean Chemical Engineering Research

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− The catalytic performance of silicon carbide supported nickel catalysts modified with or without second metal (Co, Cu and Zn) for the methanation of CO has been investigated in a fixed-bed reactor using a feed consisting of 25% CO and 75% H 2 without any diluent gas. It has been found that the introduction of Co species can clearly improve the catalytic activity of Ni/SiC catalyst, whereas the addition of Cu or Zn can result in a significant decrease in the catalytic activity. The characterizations by means of XRD, TEM, XPS, CO-TPD and H 2 -TPR indicate that the addition of Co could decrease the particle size of active metal, increase active sites on the surface of methanation catalyst, improve the chemisorption of CO and enhance the reducibility of methanation catalysts. Additionally, the special interaction between Co species and Ni species is likely favorable for the dissociation of adsorbed CO on the surface of catalyst, and this may also contribute to the high activity of 5Co-Ni/SiC catalyst for CO methanation reaction. For 5Cu-Ni/SiC catalyst and 5Zn-Ni/SiC catalyst, Cu and Zn species could cover partial nickel particles and decrease the chemisorption amount of CO. These could be responsible for the low methanation activity. In addition, a 150h stability test under 2 MPa and 300 o C showed that 5Co-Ni/SiC catalyst was very stable for CO methanation reaction.

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Section: -23 Xpssupporting

confidence: 80%

“…For 5Cu-Ni/SiC, three reduction peaks are detected. The two peaks at about 213 o C and 240 o C can be assigned to the reduction of different CuO species [47,48], and the reduction peak at 309 o C can be assigned to the reduction of NiO. The lower reduction temperature of NiO can be understood as follows.…”

Section: -23 Xpsmentioning

confidence: 99%

The Influence of a Second Metal on the Ni/SiC Catalyst for the Methanation of Syngas

Song¹,

Yu²,

Wang³

et al. 2014

Korean Chemical Engineering Research

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“…Bimetallic catalysts are used in numerous reactions, including catalytic reforming [7,[10][11][12], combustion, [13,14] and alcohol oxidation [15]. In many cases, they present superior catalytic activity and selectivity than single-component metal catalysts [5,6].…”

Section: Introductionmentioning

confidence: 99%

Surface Composition and Catalytic Evolution of Au x Pd1−x (x = 0.25, 0.50 and 0.75) Nanoparticles Under CO/O2 Reaction in Torr Pressure Regime and at 200 °C

et al. 2011

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Au x Pd 1-x (x = 0, 0.25, 0.5, 0.75, 1) nanoparticle (NP) catalysts (8-11 nm) were synthesized by a onepot reaction strategy using colloidal chemistry. XPS depth profiles with variable X-ray energies and scanning transmission electron microscopy (STEM) analyses show that the as-synthesized Au x Pd 1-x (x = 0.25 and 0.5) bimetallic NPs have gradient alloy structures with Au-rich cores and Pd-rich shells. The evolution of composition and structure in the surface region corresponding to a mean free path of 0.6-0.8 nm (i.e., 2-3 layers to the bulk from the particle surface) was studied with ambient pressure X-ray photoelectron spectroscopy (

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“…A fourth route for H 2 production from methanol, which has received major attention during the last decade, involves a combination of partial oxidation and steam reforming to an autothermal reforming process [Equation (4)]. [6][7][8] CH 3 OH ! CO þ 2H 2 ð1Þ…”

Section: Introductionmentioning

confidence: 99%

Selective Oxidation of Methanol to Hydrogen over Gold Catalysts Promoted by Alkaline‐Earth‐Metal and Lanthanum Oxides

Hereijgers

Weckhuysen

2009

ChemSusChem

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A series of alumina-supported gold catalysts was investigated for the CO-free production of hydrogen by partial oxidation of methanol. The addition of alkaline-earth metal oxide promoters resulted in a significant improvement of the catalytic performance. The methanol conversion was ca. 85 % with all studied catalyst materials, however, the selectivity for hydrogen increased from 15 % to 51 % when going from the unpromoted to a BaO-promoted catalyst. The formation of the undesired byproducts CO, methane, and dimethyl ether was considerably reduced as well. The observed trend in catalyst performance follows the trend in increasing basicity of the studied promoter elements, indicating a chemical effect of the promoter material. Superior catalytic performance, in terms of H(2) and CO selectivity, was obtained with a Au/La(2)O(3) catalyst. At 300 degrees C the hydrogen selectivity reached 80 % with only 2 % CO formation, and the catalyst displayed a stable performance over at least 24 h on-stream. Furthermore, the formation of CO was found to be independent of the oxygen concentration in the feed. The commercial lanthanum oxide used in this study had a low specific surface area, which led to the formation of relative large gold particles. Therefore, the catalytic activity could be enhanced by decreasing the gold particle size through deposition on lanthanum oxide supported on high-surface-area alumina.

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Synthesis and characterization of bimetallic Cu–Ni/ZrO2 nanocatalysts: H2 production by oxidative steam reforming of methanol

Cited by 103 publications

References 33 publications

The Influence of a Second Metal on the Ni/SiC Catalyst for the Methanation of Syngas

The Influence of a Second Metal on the Ni/SiC Catalyst for the Methanation of Syngas

Surface Composition and Catalytic Evolution of Au x Pd1−x (x = 0.25, 0.50 and 0.75) Nanoparticles Under CO/O2 Reaction in Torr Pressure Regime and at 200 °C

Selective Oxidation of Methanol to Hydrogen over Gold Catalysts Promoted by Alkaline‐Earth‐Metal and Lanthanum Oxides

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