Effect of component interaction on the activity of Co/CuZnO for CO hydrogenation

Mo, Xunhua; Tsai, Yu-Tung; Gao, Jia; Mao, Dongsen; Goodwin, James G.

doi:10.1016/j.jcat.2011.09.033

Cited by 89 publications

(59 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is likely due to the partial coverage of Ni by Cu and Zn species, which results in a decrease of active sites over 5Cu-Ni/SiC and 5Zn-Ni/SiC. Similar results were reported by Mo et al [19], who studied the role of promoters on Rh/SiO 2 catalyst in CO Fig. 6.…”

Section: -23 Xpssupporting

confidence: 84%

“…hydrogenation reaction using DRIFTS and found that the addition of Cu and Zn suppressed the adsorption of CO on the catalyst significantly. They also investigated the activity of Co/CuZnO catalyst for CO hydrogenation and found that ZnO and Cu could cover/block a substantial number of active sites on Co [42].…”

Section: -23 Xpsmentioning

confidence: 99%

“…Therefore, the introduction of promoters is possible to improve activity of catalysts by enhancing the adsorption amount of CO, by facilitating CO dissociation or by stabilizing intermediate species. It has been reported that the addition of La and Ce could form a new kind of active sites and promote the dissociation of carbon monoxide [19][20][21][22]. Some researchers found that the addition of Zr, V, Mo, W and Re had positive effect for the dissociation of CO and could enhance the formation of intermediate species on the catalyst surface [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

View full text Add to dashboard Cite

− 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.

show abstract

Section: -23 Xpssupporting

confidence: 84%

Section: -23 Xpsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

show abstract

“…For FTS, the use of SSITKA has resulted in an improved understanding on the effect of catalyst properties (promoters [72][73][74][75][76][77][78][79][80][81][82][83], support [84][85][86][87][88][89][90], particle size etc. [91][92][93][94]) and the reaction conditions [95][96][97][98][99][100][101] on the performance. Concerning the mechanism, SSITKA gives the coverage of CO and surface carbon intermediates and the site coverage of H can be estimated.…”

Section: Approaches Of Kinetic Analysis For Ftsmentioning

confidence: 99%

Recent Progresses in Understanding of Co-Based Fischer–Tropsch Catalysis by Means of Transient Kinetic Studies and Theoretical Analysis

Yang

Chen

et al. 2014

Catal Lett

View full text Add to dashboard Cite

During the last years it has been an increasing focus on fundamental studies of the Fischer-Tropsch synthesis (FTS). Steady-state isotopic transient kinetic analysis and first principles investigation have proven to be important methods in studying the reaction mechanism of FTS. The present contribution deals with recent progresses in understanding of the F-T mechanism on Co catalysts based on combined DFT calculations, in situ characterization, steady-state isotopic transient kinetic analysis and microkinetics. A brief outlook into future perspectives of the FTS for converting synthesis gas from different carbon sources to fuels and chemicals is also provided.

show abstract

“…A number of studies have highlighted the potential of using CoCu in this area. [2][3][4][5][6] The underlying motivation for using CoCu as a Fischer-Tropsch catalyst is to obtain more C 2+ alcohols in the product stream, which would be highly desirable in the production of transport fuels. In a detailed screen of CuCoCr industrial catalysts, selectivity towards C1-C6 alcohols for a catalyst comprising predominantly Cu and Co was reported (although the molecular level structure of the material was not well understood).…”

Section: Introductionmentioning

confidence: 99%

Surface Composition Changes of Redox Stabilized Bimetallic CoCu Nanoparticles Supported on Silica under H₂ and O₂ Atmospheres and During Reaction between CO₂ and H₂: In Situ X-ray Spectroscopic Characterization

et al. 2013

View full text Add to dashboard Cite

Publisher's copyright statement:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in The Journal of Physical Chemistry C, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://pubs.acs.org/doi/abs/10.1021/jp405745n. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractIn this paper, we report the colloidal synthesis and detailed characterization of 11 nm bimetallic CoCu nanoparticle catalysts. Presently Co and Cu is an attractive combination because of their respective properties for industrially important Fischer-Tropsch and methanol synthesis reactions of CO (and CO 2 ) with H 2 . We report the preparation of catalysts by deposition of bimetallic metal nanoparticles both within mesoporous silica (MCF-17) and on the native oxide surface of a silicon wafer. Subsequent phase separation into phasesegregated (i.e. dimer) particles is found to occur upon redox treatment. These nanoparticle catalysts have then been investigated using an array of techniques including synchrotronbased Ambient Pressure X-ray Photoelectron Spectroscopy (APXPS) and in situ Near Edge and Extended X-ray Absorption Fine Structure (NEXAFS / EXAFS) spectroscopies. CO 2 hydrogenation is used as a probe reaction. All three techniques combine to show that an oxygen atmosphere segregates copper to the surface. In doing so the oxygen produces oxides of both Co and Cu metals. Significant hydrogen pressure and temperature are required to fully re-reduce both metals to a metallic state as demonstrated by NEXAFS spectroscopy.Under the conditions of the CO 2 / H 2 reaction monitored in situ using NEXAFS spectroscopy, both metals exist in a fully reduced state at 2.7 bar, 1:3 CO 2 :H 2 and 260°C.2

show abstract

Effect of component interaction on the activity of Co/CuZnO for CO hydrogenation

Cited by 89 publications

References 73 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

Recent Progresses in Understanding of Co-Based Fischer–Tropsch Catalysis by Means of Transient Kinetic Studies and Theoretical Analysis

Surface Composition Changes of Redox Stabilized Bimetallic CoCu Nanoparticles Supported on Silica under H₂ and O₂ Atmospheres and During Reaction between CO₂ and H₂: In Situ X-ray Spectroscopic Characterization

Contact Info

Product

Resources

About

Effect of component interaction on the activity of Co/CuZnO for CO hydrogenation

Cited by 89 publications

References 73 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

Recent Progresses in Understanding of Co-Based Fischer–Tropsch Catalysis by Means of Transient Kinetic Studies and Theoretical Analysis

Surface Composition Changes of Redox Stabilized Bimetallic CoCu Nanoparticles Supported on Silica under H2 and O2 Atmospheres and During Reaction between CO2 and H2: In Situ X-ray Spectroscopic Characterization

Contact Info

Product

Resources

About

Surface Composition Changes of Redox Stabilized Bimetallic CoCu Nanoparticles Supported on Silica under H₂ and O₂ Atmospheres and During Reaction between CO₂ and H₂: In Situ X-ray Spectroscopic Characterization