Gold, still a surprising catalyst: Selective hydrogenation of acetylene to ethylene over Au nanoparticles

Gluhoi, Andreea C.; Bakker, J.W.; Nieuwenhuys, B.E.

doi:10.1016/j.cattod.2010.02.021

Cited by 63 publications

(57 citation statements)

References 29 publications

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“…6). The high selectivity of Au/Al 2 O 3 is in agreement with results of Jia [28] and Gluhoi [29] reported that ethyne was hydrogenated to ethene on Au/Al 2 O 3 with 100 % selectivity at 313-523 K. The initial TOF for 2.5 nm Au was 36 h −1 that is in agreement with gold hydrogenation activity [1,13,15,18] and lower in comparison with the activity of either NiO (Table 1) or Pt and Pd clusters of the same size deposited on alumina [26,30]. The positive-size effect of activity was found for gold catalysts.…”

Section: Resultssupporting

confidence: 91%

Sites for the selective hydrogenation of ethyne to ethene on supported NiO/Au catalysts

2012

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Au, NiO, and NiO/Au clusters of 2.5-16 nm, supported on Al 2 O 3 , ZrO 2 , TiO 2 , and ZnO, were studied in the purification of ethene feedstock from ethyne by hydrogenation at 357 K. The Au, NiO, and NiO/Au catalysts possessed 100 % selectivity to ethene. As the size of NiO clusters decreased from 7 to 3 nm, the turnover frequency (TOF) decreased from 812-1,023 to 276 h −1 . In contrast with NiO, Au activity increased with decreasing particle size. NiO/Au catalysts possessed higher stability and activity in comparison with Au and NiO catalysts. The synergistic gain on NiO/Au clusters (SG) calculated as TOF NiO/Au -TOF Au -TOF NiO was 1,466; 1,147; 563; and 569 h −1 for NiO/Au/Al 2 O 3, NiO/Au/TiO 2 , NiO/Au/ZnO, and NiO/Au/ ZrO 2 , respectively. The reasons of the observed catalytic trends and the origin of the most active and selective sites are discussed.

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Section: Resultssupporting

confidence: 91%

Sites for the selective hydrogenation of ethyne to ethene on supported NiO/Au catalysts

2012

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“…To improve the performance of mono-metallic Pd catalyst, a second metal (such as Ag [6], Zn [7], Cu [8], Au [9,10] and Ga [11,12]) is added to form alloy or intermetallic compound. In the alloy (such as Pd-Ag [6]) and intermetallic compound (such as PdGa [11,12]), the second metal atoms can dilute the surface Pd ones and subsequently to form more isolated Pd atoms, while the isolated Pd atoms can restrain the adsorption of acetylene or ethylene via triply-bond that can easily be hydrogenated to ethane.…”

Section: Introductionmentioning

confidence: 99%

Selective hydrogenation of acetylene on SiO2 supported Ni-In bimetallic catalysts: Promotional effect of In

Chen

2016

Applied Surface Science

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“…This article is not intended as a general review of gold as an hydrogenation catalyst, as other excellent reviews are available [9][10][11][12][13]: rather it seeks to point out aspects of our early work that have not been fully exploited in the interim, and to explore how recent work on the chemisorption and reactions of H 2 , and its reaction with unsaturated hydrocarbons, clarifies the behaviour of gold particles less than 10 nm in size.…”

Section: Introductionmentioning

confidence: 99%

Hydrogenation by gold catalysts: an unexpected discovery and a current assessment

Bond

2016

Gold Bull

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Gold in the massive state shows little tendency either to chemisorb simple molecules or to act catalytically. The discovery made in 1973 that low loadings of Au on Al 2 O 3 and particularly on SiO 2 were active in alkene hydrogenation when prepared by thermal decomposition of adsorbed AuCl 4 − paved the way for later extensive studies of catalysis by this metal. The activity was attributed to that being Au particles <4 nm in size, and it soon appeared that similar catalysts performed the selective hydrogenation of 2-butyne and 1,3-butadiene. Later work strongly suggests that Au particles below ∼2.5 nm in size, and having non-metallic character, are especially adept at H 2 chemisorption and H 2 -D 2 equilibration, and that alkene hydrogenation then occurs in an H-rich environment. Larger Au particles have more limited activity, perhaps associated with atoms of low coordination number and an H-poor environment.

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Gold, still a surprising catalyst: Selective hydrogenation of acetylene to ethylene over Au nanoparticles

Cited by 63 publications

References 29 publications

Sites for the selective hydrogenation of ethyne to ethene on supported NiO/Au catalysts

Sites for the selective hydrogenation of ethyne to ethene on supported NiO/Au catalysts

Selective hydrogenation of acetylene on SiO2 supported Ni-In bimetallic catalysts: Promotional effect of In

Hydrogenation by gold catalysts: an unexpected discovery and a current assessment

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