The Characterisation of Supported Platinum Nanoparticles on Carbon Used for Enantioselective Hydrogenation: A Combined Electrochemical–STM Approach

Attard, Gary Anthony; Ahmadi, Ahmad; Jenkins, David J.; Hazzazi, Omar A.; Wells, Peter B.; Griffin, Ken; Johnston, Peter; Gillies, Jennifer E.

doi:10.1002/cphc.200390021

Cited by 29 publications

(29 citation statements)

References 27 publications

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“…Those adsorbates exhibiting a lower work function than platinum tend to populate step sites in preference to terraces [6]. However, we have reported that for bismuth adsorbed on Pt{h k l}, this type of behaviour is only observed for Pt{h k l} planes vicinal to Pt{1 1 1} and that for surfaces containing more open planes, random adsorption is observed [22]. The promotional effect of various adatoms on platinum electrodes used in the electrooxidation of small organic molecules should also be noted [23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 66%

Electrochemical characterisation of gold on Pt{hkl} for ethanol electrocatalysis

Hazzazi

Attard

Wells

et al. 2009

Journal of Electroanalytical Chemistry

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Section: Introductionmentioning

confidence: 66%

Electrochemical characterisation of gold on Pt{hkl} for ethanol electrocatalysis

Hazzazi

Attard

Wells

et al. 2009

Journal of Electroanalytical Chemistry

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“…The structural attributes that determine whether or not a given chiral ligand is effective 34 have been identified; the ability to form strong covalent bonds with the metal surface while also 35 resisting hydrogenation and displacement by the strongly-adsorbing reactant under reaction conditions 36 are essential necessary conditions. Beyond these, ligand rigidity in the vicinity of the chirality center 37 coupled with resistance to SAM formation are critically important factors whose absence results in 38 racemic chemistry.…”

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confidence: 99%

Aspects of Heterogeneous Enantioselective Catalysis by Metals

2011

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Publisher's copyright statement:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Langmuir, 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/la200009w. 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-pro t 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. Some aspects of metal-catalyzed heterogeneous enantioselective reactions are reviewed with specific 23 reference to four different systems where the phenomena that control enantioselection appear to be very 24 different. In the case of glucose electro-oxidation it is clear that any intrinsic chirality present at the 25 metal surface plays a vital role. With -keto hydrogenation, achiral surfaces modified by the adsorption 26 of chiral agents become effective enantioselective catalysts and formation of extended arrays of chiral 27 species appears not to be of importance: instead a 1:1 docking interaction controlled by hydrogen 28 bonding between the adsorbed chiral modifier and the prochiral reactant determines the outcome. 29Hydrogen bonding also plays a central role in -ketoester hydrogenation, but here fundamental studies 30indicate that the formation of ordered arrays involving the reactant and chiral ligand is of importance. 31Asymmetric C=C hydrogenation, though relatively little studied, has the potential for major impact in 32 synthetic organic chemistry both at the laboratory scale and in the manufacture of fine chemicals and 33 pharmaceuticals. The structural attributes that determine whether or not a given chiral ligand is effective 34 have been identified; the ability to form strong covalent bonds with the metal surface while also 35 resisting hydrogenation and displacement by the strongly-adsorbing reactant under reaction conditions 36 are essential necessary conditions. Beyond these, ligand rigidity in the vicinity of the chirality center 37 coupled with resistance to SAM formation are critically important factors whose absence results in 38 racemic chemistry.

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“…The representative examples include the chiral reconstruction of Ni(110) induced by TA adsorption and the chiral faceting of Cu(100) upon L -lysine adsorption [13,57]. Recently, Attard et al [58] proposes the enantioselectivity of cinchona/Pt catalysts is related to the chiral kinks at the corner of catalysts nanoparticles by the combination of electrochemistry and STM observation.…”

Section: Discussionmentioning

confidence: 98%

Surface Structure of Heterogeneous Catalysts: Cinchona and Tartaric Acid on Solid Surface

Wang

Yan

et al. 2005

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The Characterisation of Supported Platinum Nanoparticles on Carbon Used for Enantioselective Hydrogenation: A Combined Electrochemical–STM Approach

Cited by 29 publications

References 27 publications

Electrochemical characterisation of gold on Pt{hkl} for ethanol electrocatalysis

Electrochemical characterisation of gold on Pt{hkl} for ethanol electrocatalysis

Aspects of Heterogeneous Enantioselective Catalysis by Metals

Surface Structure of Heterogeneous Catalysts: Cinchona and Tartaric Acid on Solid Surface

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