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Fajín JLC, Cordeiro MNDS. N2O Hydrogenation on Silver Doped Gold Catalysts, A DFT Study. Nanomaterials 2022; 12:nano12030394. [PMID: 35159739 PMCID: PMC8838666 DOI: 10.3390/nano12030394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/16/2022] [Accepted: 01/21/2022] [Indexed: 11/16/2022]
Abstract
In this study, the full reaction mechanism for N2O hydrogenation on silver doped Au(210) surfaces was investigated in order to clarify the experimental observations. Density functional theory (DFT) calculations were used to state the most favorable reaction paths for individual steps involved in the N2O hydrogenation. From the DFT results, the activation energy barriers, rate constants and reaction energies for the individual steps were determined, which made it possible to elucidate the most favorable reaction mechanism for the global catalytic process. It was found that the N2O dissociation occurs in surface regions where silver atoms are present, while hydrogen dissociation occurs in pure gold regions of the catalyst or in regions with a low silver content. Likewise, N2O dissociation is the rate determining step of the global process, while water formation from O adatoms double hydrogenation and N2 and H2O desorptions are reaction steps limited by low activation energy barriers, and therefore, the latter are easily carried out. Moreover, water formation occurs in the edges between the regions where hydrogen and N2O are dissociated. Interestingly, a good dispersion of the silver atoms in the surface is necessary to avoid catalyst poison by O adatoms accumulation, which are strongly adsorbed on the surface.
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Affiliation(s)
- José L. C. Fajín
- LAQV@REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, P-4169-007 Porto, Portugal
| | - M. Natália D. S. Cordeiro
- LAQV@REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, P-4169-007 Porto, Portugal
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Gomes JRB, Viñes F, Illas F, Fajín JLC. Implicit solvent effects in the determination of Brønsted–Evans–Polanyi relationships for heterogeneously catalyzed reactions. Phys Chem Chem Phys 2019; 21:17687-17695. [DOI: 10.1039/c9cp02817j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Brønsted–Evans–Polanyi relationship derived for the water dissociation reaction within an implicit solvent approach is similar to that without such effects.
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Affiliation(s)
- José R. B. Gomes
- CICECO – Aveiro Institute of Materials
- Departamento de Química
- Universidade de Aveiro
- Campus Universitário de Santiago
- 3810-193 Aveiro
| | - Francesc Viñes
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- c/Martí i Franquès 1
- 08028 Barcelona
- Spain
| | - Francesc Illas
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- c/Martí i Franquès 1
- 08028 Barcelona
- Spain
| | - José L. C. Fajín
- LAQV@REQUIMTE
- Faculdade de Ciências
- Universidade do Porto
- P-4169-007 Porto
- Portugal
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Abstract
The reactivity of metallic nanotubes toward the catalysis of water dissociation, a key step in the water gas shift reaction (WGSR), was analyzed through density functional theory (DFT) calculations. Water dissociation was studied on surfaces of nanotubes based on copper, gold and platinum, and also on platinum doped copper and gold nanotubes. Gold and copper nanotubes present activities that are similar to those of their corresponding extended surfaces but, in the case of the Pt(5,3) nanotube, a significant improvement in the activity is found when compared with the extended surfaces. In fact, the calculations predict the water dissociation to be spontaneous on Pt(5,3) with a low activation energy barrier. The platinum doping of gold and copper nanotubes leads to contrasting effects, i.e., with a slight increase of activity found on gold and a slight decrease of activity in the case of copper. The consideration of a Brönsted-Evans-Polanyi (BEP) relationship to estimate the activation energy barriers for the O-H bond break leads to a satisfactory agreement between estimated and explicitly calculated values which suggests the validity of the BEP relationship for qualitative predictions of the activities of metal nanotubes towards the water dissociation reaction.
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Affiliation(s)
- José L C Fajín
- LAQV@REQUIMTE, Faculdade de Ciências, Universidade do Porto, P-4169-007 Porto, Portugal.
| | - M Natália D S Cordeiro
- LAQV@REQUIMTE, Faculdade de Ciências, Universidade do Porto, P-4169-007 Porto, Portugal.
| | - José R B Gomes
- CICECO - Aveiro Institute of Materials, Departamento de Química, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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Fajín JLC, Viñes F, D S Cordeiro MN, Illas F, Gomes JRB. Effect of the Exchange-Correlation Potential on the Transferability of Brønsted-Evans-Polanyi Relationships in Heterogeneous Catalysis. J Chem Theory Comput 2016; 12:2121-6. [PMID: 27111183 DOI: 10.1021/acs.jctc.6b00168] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
As more and more accurate density functional methods emerge, the transferability of Brønsted-Evans-Polanyi (BEP) relationships obtained with previous models is an open question. In this work, BEP relationships derived from different density functional theory based calculations are analyzed to answer this question. In particular, BEP relationships linking the activation energy of O-H bond breaking reactions taking place on metallic surfaces with the adsorption energy of the reaction products are chosen as a case study. These relationships are obtained with the widely used Perdew-Wang (PW91) generalized gradient approximation (GGA) exchange-correlation functional and with the more accurate meta-GGA Tao-Perdew-Staroverov-Scuseria (TPSS) one. We provide compelling evidence that BEP relationships derived from PW91 and TPSS functionals are essentially coincidental. This finding validates previously published BEP relationships and indicates that the reaction activation energy barrier can be obtained by the determination of the energy reaction descriptor value at the less computationally demanding GGA level; an important aspect to consider in future studies aimed at the computational design of catalysts with improved characteristics.
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Affiliation(s)
- José L C Fajín
- LAQV@REQUIMTE, Faculdade de Ciências, Universidade do Porto , P-4169-007 Porto, Portugal
| | - Francesc Viñes
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona , c/Martí i Franquès 1, 08028 Barcelona, Spain
| | - M Natália D S Cordeiro
- LAQV@REQUIMTE, Faculdade de Ciências, Universidade do Porto , P-4169-007 Porto, Portugal
| | - Francesc Illas
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona , c/Martí i Franquès 1, 08028 Barcelona, Spain
| | - José R B Gomes
- CICECO-Aveiro Institute of Materials, Departamento de Química, Universidade de Aveiro , 3810-193 Aveiro, Portugal
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Fajín JLC, Cordeiro MNDS, Gomes JRB. Methanol dissociation on bimetallic surfaces: validity of the general Brønsted–Evans–Polanyi relationship for O–H bond cleavage. RSC Adv 2016. [DOI: 10.1039/c6ra01118g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Density functional theory calculations were used to study the dissociation of the O–H bond in methanol on several bimetallic transition metal surfaces, composed of elements showing high or moderate activity towards this reaction, namely, Ni, Rh, Ru, Ir, Pd, Au, Zn and Cu.
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Affiliation(s)
- José L. C. Fajín
- LAQV@REQUIMTE
- Faculdade de Ciências
- Universidade do Porto
- P-4169-007 Porto
- Portugal
| | | | - José R. B. Gomes
- CICECO–Aveiro Institute of Materials
- Departamento de Química
- Universidade de Aveiro
- 3810-193 Aveiro
- Portugal
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Fajín JLC, Teixeira F, Gomes JRB, Cordeiro MNDS. Effect of van der Waals interactions in the DFT description of self-assembled monolayers of thiols on gold. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1666-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Fajín JLC, D. S. Cordeiro MN, Gomes JRB. Density Functional Theory Study of the Water Dissociation on Platinum Surfaces: General Trends. J Phys Chem A 2014; 118:5832-40. [DOI: 10.1021/jp411500j] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- José L. C. Fajín
- REQUIMTE, Faculdade
de Ciências, Universidade do Porto, Rua do Campo
Alegre, 687, P-4169-007 Porto, Portugal
| | - M. Natália D. S. Cordeiro
- REQUIMTE, Faculdade
de Ciências, Universidade do Porto, Rua do Campo
Alegre, 687, P-4169-007 Porto, Portugal
| | - José R. B. Gomes
- CICECO, Departamento
de Química, Universidade de Aveiro, Campus Universitário
de Santiago, 3810-193 Aveiro, Portugal
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Abstract
The adsorption of cysteine onto the intrinsically chiral gold surface, Au(321)(R,S), was investigated by means of a periodic supercell density functional theory approach. The results are compared to those obtained at the same level of theory with a nonchiral surface having the same terrace orientation, the Au(111) surface. Neutral and zwitterionic cysteine forms of the L and D enantiomers are considered, as are surface coverage effects. It was found that at high coverage the zwitterionic forms of L- and D-cysteine are more stable on the Au(321)(R,S) faces of the stepped surface and also on the flat Au(111) surface, leading to highly organized cysteine monolayers. However, at low coverage the adsorption of cysteine dimers, with the pairs interacting through their carbonyl groups, is more favorable than or at least equally favorable to the adsorption of single cysteine molecules on both surfaces. A comparison between the cysteine adsorption on the two different surface structures shows that the adsorption on the stepped surface is clearly more favorable than on the flat surface, revealing the importance of the low-coordinated gold atoms in the adsorption of these species. Furthermore, non-negligible differences between the adsorption energy of the enantiomers of cysteine were found both at high and low coverage, thus showing the enantiospecificity of this intrinsically chiral surface regarding cysteine adsorption. This adsorption occurs with the cysteine binding the surface through only one contact point (by its sulfur atom), in contrast to previous work where the enantiospecific adsorption of cysteine has been related to two nonequivalent binding sites of the cysteine enantiomers with the surface.
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Affiliation(s)
- José L C Fajín
- REQUIMTE, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
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Fajín JLC, Cordeiro MNDS, Gomes JRB. A DFT study of the NO dissociation on gold surfaces doped with transition metals. J Chem Phys 2013; 138:074701. [DOI: 10.1063/1.4790602] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Fajín JLC, Bruix A, Cordeiro MNDS, Gomes JRB, Illas F. Density functional theory model study of size and structure effects on water dissociation by platinum nanoparticles. J Chem Phys 2012; 137:034701. [DOI: 10.1063/1.4733984] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Fajín JLC, D. S. Cordeiro MN, Gomes JRB, Illas F. On the Need for Spin Polarization in Heterogeneously Catalyzed Reactions on Nonmagnetic Metallic Surfaces. J Chem Theory Comput 2012; 8:1737-43. [DOI: 10.1021/ct3001415] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- José L. C. Fajín
- REQUIMTE, Faculdade de Ciências, Universidade do Porto, P-4169-007, Porto, Portugal
| | | | - José R. B. Gomes
- CICECO, Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Francesc Illas
- Department de Química Física & Institut de Química Teòrica i Computacional (IQTCUB), University of Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
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Fajín JLC, Cordeiro MNDS, Gomes JRB. On the theoretical understanding of the unexpected O2activation by nanoporous gold. Chem Commun (Camb) 2011; 47:8403-5. [DOI: 10.1039/c1cc12166a] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fajín JLC, Illas F, Gomes JRB. Effect of the exchange-correlation potential and of surface relaxation on the description of the H2O dissociation on Cu(111). J Chem Phys 2009; 130:224702. [DOI: 10.1063/1.3149851] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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