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Kulikovskaya NS, Ondar EE, Perepukhov AM, Kostyukovich AY, Novikov RA, Ananikov VP. Structure and Dynamic Rearrangements of the Pt 2dba 3 and Pd 2dba 3 Complexes in Solution. Inorg Chem 2024; 63:10527-10541. [PMID: 38813621 DOI: 10.1021/acs.inorgchem.4c00803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Although the tris(dibenzylideneacetone)diplatinum complex (Pt2dba3) is an important source of Pt(0) used in catalysis and materials science, its structure has not yet been fully elucidated. A thorough study of the three-dimensional structure of Pt2dba3 and its dynamic behavior in solution was carried out using NMR spectroscopy methods at a high field (600 MHz) and molecular modeling. The complex was shown to contain three dba ligands in the s-cis,s-trans, s-trans,s-cis, and s-trans,s-trans conformations, which are uniformly oriented around the Pt2 backbone. In solution, the Pt2dba3 and Pd2dba3 complexes undergo rapid dynamic rearrangements, as evidenced by the exchange between the signals of the olefin protons of various dba ligands in the EXSY NMR spectra. According to the experimental measurements, the activation energies of the rearrangements were estimated to be 19.9 ± 0.2 and 17.9 ± 0.2 kcal/mol for the platinum and palladium complexes, respectively. Three possible mechanisms for this chemical exchange process were considered within the framework of DFT calculations. According to the calculated data, M2dba3 complexes undergo fluxional isomerization involving successive rotations of the dihedral angles formed by the carbonyl group and the C═C bond. Dissociation of dba ligands does not occur within these processes.
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Affiliation(s)
- Natalia S Kulikovskaya
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | - Evgeniia E Ondar
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | - Alexander M Perepukhov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | | | - Roman A Novikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | - Valentine P Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
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High oxygen reduction reaction activity and durability of Pt catalyst photo-deposited on SnO2-coated and uncoated multi-walled carbon nanotubes. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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You H, Xuan Y, Zuo Y, Shen F, Han X, Fang J. Insight of holey-graphene in the enhancing of electrocatalytic activity as supporting material. NANOTECHNOLOGY 2018; 29:425708. [PMID: 30070658 DOI: 10.1088/1361-6528/aad7a2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
An ideal supporting material improves both activity and durability of noble metal nanoparticles in electrocatalytic reactions. Graphene possesses a high transport rate of electrons in-plane, a low cost, and stability, but, the restacking of graphene layers trap noble metal nanoparticles and make them inaccessible to reactants and results in reduced catalytic activity. Here, holey-graphene as the supporting materials for Pt nanoparticle catalysts is deeply investigated in the electrocatalytic reaction of methanol oxidation. The holey-graphene can be scalable to synthesize using our simple method described herein. The holes on the holey-graphene layer promote the access of reactants with Pt nanoparticle catalysts compared with carbon black and graphene when used as supporting materials. Density functional theory calculations and molecule dynamic simulation further explain the function of holey-graphene in the promotion of electrocatalytic activity. Holey-graphene may open extraordinary possibilities as a supporting material for electrocatalysts.
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Affiliation(s)
- Hongjun You
- School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China. Key Laboratory of Physical Electronics and Devices of Ministry of Education, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China
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Ehrenburg MR, Danilov AI, Botryakova IG, Molodkina EB, Rudnev AV. Electroreduction of nitrate anions on cubic and polyoriented platinum nanoparticles modified by copper adatoms. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.08.051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Amorphous carbon thin film electrodes with intrinsic Pt-gradient for hydrogen peroxide detection. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.110] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Arán-Ais RM, Yu Y, Hovden R, Solla-Gullón J, Herrero E, Feliu JM, Abruña HD. Identical Location Transmission Electron Microscopy Imaging of Site-Selective Pt Nanocatalysts: Electrochemical Activation and Surface Disordering. J Am Chem Soc 2015; 137:14992-8. [DOI: 10.1021/jacs.5b09553] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rosa M. Arán-Ais
- Instituto
de Electroquímica, Universidad de Alicante. Apdo 99, 03080, Alicante, Spain
| | | | | | - Jose Solla-Gullón
- Instituto
de Electroquímica, Universidad de Alicante. Apdo 99, 03080, Alicante, Spain
| | - Enrique Herrero
- Instituto
de Electroquímica, Universidad de Alicante. Apdo 99, 03080, Alicante, Spain
| | - Juan M. Feliu
- Instituto
de Electroquímica, Universidad de Alicante. Apdo 99, 03080, Alicante, Spain
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Do I, Drzal LT. Ionic liquid-assisted synthesis of Pt nanoparticles onto exfoliated graphite nanoplatelets for fuel cells. ACS APPLIED MATERIALS & INTERFACES 2014; 6:12126-12136. [PMID: 25036977 DOI: 10.1021/am5012832] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Exfoliated graphite nanoplatelets (GnP) has been investigated as an electrocatalyst support for fuel cell applications. GnP-supported Pt catalysts were synthesized by a microwave process in the presence of room temperature ionic liquids (RTILs). Thermal-oxidation resistance of GnP and GnP-supported Pt catalysts was studied by thermogravimetric analysis and compared with a variety of other carbon nanostructures: carbon black, graphite nanofiber, single- and multiwalled carbon nanotubes. GnP showed the best thermal-oxidative stability. The results obtained from X-ray diffraction, X-ray photoelectron spectroscopy, electrochemical testing, scanning and transmission electron microscopy showed that the RTIL synthesis method resulted in size reduction of Pt nanoparticle, improvement of Pt dispersion on GnP, and identification of the relationships between the mean size of Pt particles with increasing RTIL content. The interaction of Pt particles-GnP is stronger than that of a commercial Pt-CB, and the Pt/GnP catalysts prepared by this method have excellent electrocatalytic activity and stability for methanol oxidation.
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Affiliation(s)
- Inhwan Do
- Department of Chemical Engineering and Materials Science, Composite Materials and Structures Center, Michigan State University , East Lansing, Michigan 48824, United States
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Liu ZL, Huang R, Deng YJ, Chen DH, Huang L, Cai YR, Wang Q, Chen SP, Sun SG. Catalyst of Pt nanoparticles loaded on multi-walled carbon nanotubes with high activity prepared by electrodeposition without supporting electrolyte. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.05.139] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Porous electrodes based on platinum capped electrocatalyst: Combining thermal treatment XPS analysis and electrochemistry give evidence for the stabilizing role of the thiol capping agent on the Pt dispersion and core feature. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.01.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Site Blocking with Gold Adatoms as an Approach to Study Structural Effects in Electrocatalysis. Electrocatalysis (N Y) 2012. [DOI: 10.1007/s12678-012-0104-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Carino EV, Crooks RM. Characterization of Pt@Cu core@shell dendrimer-encapsulated nanoparticles synthesized by Cu underpotential deposition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:4227-4235. [PMID: 21384847 DOI: 10.1021/la2001915] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Dendrimer-encapsulated nanoparticles (DENs) containing averages of 55, 147, and 225 Pt atoms immobilized on glassy carbon electrodes served as the electroactive surface for the underpotential deposition (UPD) of a Cu monolayer. This results in formation of core@shell (Pt@Cu) DENs. Evidence for this conclusion comes from cyclic voltammetry, which shows that the Pt core DENs catalyze the hydrogen evolution reaction before Cu UPD, but that after Cu UPD this reaction is inhibited. Results obtained by in situ electrochemical X-ray absorption spectroscopy (XAS) confirm this finding.
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Affiliation(s)
- Emily V Carino
- Department of Chemistry and Biochemistry, Center for Electrochemistry, and the Texas Materials Institute, The University of Texas at Austin, 1 University Station, A5300, Austin, Texas 78712-0165, United States
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CO electrooxidation on carbon supported platinum nanoparticles: Effect of aggregation. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2009.06.016] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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FUJIGAYA T, TANAKA Y, NAKASHIMA N. Soluble Carbon Nanotubes and Application to Electrochemistry. ELECTROCHEMISTRY 2010. [DOI: 10.5796/electrochemistry.78.2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Alexeyeva N, Tammeveski K, Lopez-Cudero A, Solla-Gullón J, Feliu J. Electroreduction of oxygen on Pt nanoparticle/carbon nanotube nanocomposites in acid and alkaline solutions. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2009.09.030] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Baret B, Aubert PH, L’Hermite MM, Pinault M, Reynaud C, Etcheberry A, Perez H. Nanocomposite electrodes based on pre-synthesized organically capped platinum nanoparticles and carbon nanotubes. Part I: Tuneable low platinum loadings, specific H upd feature and evidence for oxygen reduction. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2009.04.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Xiao X, Fan FRF, Zhou J, Bard AJ. Current Transients in Single Nanoparticle Collision Events. J Am Chem Soc 2008; 130:16669-77. [DOI: 10.1021/ja8051393] [Citation(s) in RCA: 347] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaoyin Xiao
- Center for Electrochemistry, Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station A5300, Austin, Texas 78712-0165
| | - Fu-Ren F. Fan
- Center for Electrochemistry, Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station A5300, Austin, Texas 78712-0165
| | - Jiping Zhou
- Center for Electrochemistry, Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station A5300, Austin, Texas 78712-0165
| | - Allen J. Bard
- Center for Electrochemistry, Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station A5300, Austin, Texas 78712-0165
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