Junctions between CuOx and ZnOy in sensors for CO and catalystsfor CO hydrogenation

Miller, Brian J.; Martín-Luengo, Maria Ángeles; Vong, M. S. W.; Wang, Y.; Self, Valerie A.; Chapman, Stephanie; Sermon, Paul A.

doi:10.1039/a700747g

Cited by 13 publications

(11 citation statements)

References 52 publications

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“…For its particular optical properties, Cu 2 O is applied in optical devices and solar cells [1]. Recently, Cu 2 O is also reported as a promising negative electrode for Li ion battery [2][3][4] and gas sensors [5]. The approaches to prepare Cu 2 O thin films including physical vapor deposition (PVD) [6], chemical vapor deposition (CVD) [7] and electrochemical deposition (ECD) have been reported.…”

Section: Introductionmentioning

confidence: 99%

The structural evolution and electrochemical properties of the textured Cu2O thin films

Lee

Leu

Liao

et al. 2007

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

The structural evolution and electrochemical properties of the textured Cu2O thin films

Lee

Leu

Liao

et al. 2007

Journal of Alloys and Compounds

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“…Both the CO 2 conversion and methanol selectivity are improved when the fourth element is added. With the introduction of Zn, the activity increased greatly, which might be due to the fact that the active site is Cu δ+ -O-Zn 2+ [31,32]. However, the activity improvement is slight for Ce-P.…”

Section: Catalytic Performancementioning

confidence: 91%

Copper-based Perovskite Design and Its Performance in CO2 Hydrogenation to Methanol

Li¹,

Zhan²,

Zhao³

et al. 2016

Perovskite Materials - Synthesis, Characterisation, Properties, and Applications

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Three series of perovskite-type catalysts, i.e., La-M-Mn-Cu-O (M = Mg, Y, Zn, Ce), La-M-Cu-Zn-O (M = Ce, Mg, Zr, Y), and La-Mn-Zn-Cu-O, were designed and applied in CO 2 hydrogenation to methanol. The materials were characterized by XRD, N 2 -adsorption, N 2 O-adsorption, ICP-OES, XPS, and TPD techniques. Perovskite structures were observed and the ''metal on oxide'' could be realized via reduction. Upon the introduction of the fourth elements, more structure defects, smaller particles, higher Cu dispersion, larger amount of hydrogen desorption at low temperature, and more amount of basic sites were obtained. The selectivity for methanol and the TOF values were higher for the catalysts derived from perovskite-type precursors. The catalytic performance was related to Cu α+ and/or Cu 0 species, low-temperature H 2 adsorption on the unit, and the weak basic sites.

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“…Nevertheless in CO2 hydrogenation the CH30H/CH4 ratio was higher fiian for CO (i.e., CO2 hydrogenation-conversion to methanol was more selective than CO, with a methanol/methane ratio of 430). Furthermore, the overall conversion of CO was much higher than for ZrO2 alone (10.34 versus 1.83% [13]) and so one must look for active sites at the Cu/ZrO2 interface [14]. Finally Cu/ZrO2 is about three times more active in CO hydrogenation [ 14] than Cu/ZnO (producing 39.7/zmol CH3OH/gcat/min [10]) for which special sites exist at the interface of Cu and ZnO which are also thought to be important and may involve formate species bridging between Cu and Zn ions [15] which convert to methanol [14].…”

Section: Co/cozmentioning

confidence: 98%

Doped-ZrO2 aerogels: Catalysts of controlled structure and properties

Sermon

Self

Sun

1997

J Sol-Gel Sci Technol

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Abstract. Doped ZrO2 aerogels (characterised by TEM, DTA and N2 adsorption) have been prepared and catalytically tested in CO/CO2 hydrogenation [1] and CH4 oxidation [2]. The primary aerogels showed cross-linked clusters of (X-ray) amorphous particles smaller than 5 nm which led to well-developed mesoporous solids with an average pore size of about 10 nm and high surface area (up to 250 m2g -1) [1]. Cu/ZrO2 aerogels (known to be very active and selective towards methanol synthesis in CO hydrogenation without predominant formation of alkanes even at higher temperatures [1]) are now seen to show these effects even more clearly in CO2 hydrogenation. In methane oxidation, both Rh/ZrO2 and Y2Oa/ZrO2 were very active. Consideration is given to the nature of the active sites, the role of CO2 and metal/oxide interfaces and how an understanding of this reactivity can lead to better dispersed ZrO2.

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Junctions between CuOx and ZnOy in sensors for CO and catalystsfor CO hydrogenation

Cited by 13 publications

References 52 publications

The structural evolution and electrochemical properties of the textured Cu2O thin films

The structural evolution and electrochemical properties of the textured Cu2O thin films

Copper-based Perovskite Design and Its Performance in CO2 Hydrogenation to Methanol

Doped-ZrO2 aerogels: Catalysts of controlled structure and properties

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