1
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Hirase H, Iida K, Hasegawa JY. Characterization of changes in the electronic structure of platinum sub-nanoclusters supported on graphene induced by oxygen adsorption. Phys Chem Chem Phys 2024; 26:18530-18537. [PMID: 38869073 DOI: 10.1039/d4cp00555d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
As the sizes of noble metal catalysts, such as platinum, have been successfully minimized, fundamental insights into the electronic properties of metal sub-nanoclusters are increasingly sought for optimizing their catalytic performance. However, it is difficult to rationalize the catalytic activities of metal sub-nanoclusters owing to their more complex electronic structure compared with those of small molecules and bulky solids. In this study, the adsorption of molecular oxygen on a Pt13 sub-nanocluster supported on a graphene layer was analyzed using density functional theory. Unlike bulk Pt, the Pt13 sub-nanocluster has multiple adsorption sites, and the adsorption energy depends strongly on the type of adsorption site. The O2 adsorption energy does not correlate with the transferred charge between O2 and the Pt13 moiety; therefore, to elucidate the differences in the adsorption sites, we propose an original approach for analyzing the electronic structure change in metal sub-nanoclusters caused by molecular adsorption. Our analysis of the integrated local density of state (LDOS) revealed that O2 adsorption on the Pt13 sub-nanocluster has a distinct feature, different from that on a smaller Pt2 cluster or rather a larger Pt slab. The change in the electronic structure of the Pt13 moiety was primarily observed near the Fermi level, different from that of the Pt slab whose DOS was distributed over a wide energy range. Furthermore, the change in the integrated LDOS correlated well with the O2 adsorption energy on the Pt13 sub-nanocluster.
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Affiliation(s)
- Hinoki Hirase
- Institute for Catalysis, Hokkaido University, N21 W10 Kita-ku, Sapporo, 001-0021 Hokkaido, Japan.
| | - Kenji Iida
- Institute for Catalysis, Hokkaido University, N21 W10 Kita-ku, Sapporo, 001-0021 Hokkaido, Japan.
| | - Jun-Ya Hasegawa
- Institute for Catalysis, Hokkaido University, N21 W10 Kita-ku, Sapporo, 001-0021 Hokkaido, Japan.
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology, Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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2
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Radael GN, Oliveira GG, Pontes RM. A DFT study of ethanol interaction with the bimetallic clusters of PtSn and its implications on reactivity. J Mol Graph Model 2023; 125:108621. [PMID: 37689026 DOI: 10.1016/j.jmgm.2023.108621] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/11/2023]
Abstract
The comprehension of the factors affecting the adsorption of ethanol over metals and metal alloys is a crucial step for the rational development of new catalysts for hydrogen production through ethanol reforming. In this work, we analyze the effect of combining Pt and Sn on a metal cluster on the complexation energy and reactivity for OH dehydrogenation of ethanol. Metal clusters of Pt10, Sn10 and Pt5Sn5 had their putative minimum located with the help of the artificial bee colony algorithm. Whereas the isolated Pt cluster shows a high degree of polarization (ESP surface), the Sn cluster shows a quite uniform electron density surface. The PtSn cluster is strongly polarized, with Pt atoms withdrawing electron density of Sn atoms. Complexation occurs with the oxygen atom of ethanol directed towards the point of highest electron potential in the ESP surface. Pt presents the highest complexation energy, -20.90 kcal/mol, against only -7.83 kcal/mol (at the B97-3c level). For the PtSn cluster, the value is intermediate, namely -12.39 kcal/mol. The more malleable electron density of Pt and its electron affinity are responsible for its highest complexation energy. These characteristics are partially transferred to the PtSn cluster. QTAIM results show that, for the PtSn cluster, the O-H bond in ethanol is somewhat weaker than for pure Pt and Sn. As a consequence, the energy barrier for the O-H dehydrogenation has its lowest value for the PtSn cluster, which shows that the alloying of two metals can lead to quite quite unexpected results opening the perspective for a more rational fine tuning of catalysts properties.
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Affiliation(s)
- Graziela N Radael
- Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5790, Maringá, Paraná, CEP 87900-020, Brazil
| | - Gabriel G Oliveira
- Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5790, Maringá, Paraná, CEP 87900-020, Brazil
| | - Rodrigo M Pontes
- Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5790, Maringá, Paraná, CEP 87900-020, Brazil.
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3
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Lin F, Li M, Zeng L, Luo M, Guo S. Intermetallic Nanocrystals for Fuel-Cells-Based Electrocatalysis. Chem Rev 2023; 123:12507-12593. [PMID: 37910391 DOI: 10.1021/acs.chemrev.3c00382] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
Electrocatalysis underpins the renewable electrochemical conversions for sustainability, which further replies on metallic nanocrystals as vital electrocatalysts. Intermetallic nanocrystals have been known to show distinct properties compared to their disordered counterparts, and been long explored for functional improvements. Tremendous progresses have been made in the past few years, with notable trend of more precise engineering down to an atomic level and the investigation transferring into more practical membrane electrode assembly (MEA), which motivates this timely review. After addressing the basic thermodynamic and kinetic fundamentals, we discuss classic and latest synthetic strategies that enable not only the formation of intermetallic phase but also the rational control of other catalysis-determinant structural parameters, such as size and morphology. We also demonstrate the emerging intermetallic nanomaterials for potentially further advancement in energy electrocatalysis. Then, we discuss the state-of-the-art characterizations and representative intermetallic electrocatalysts with emphasis on oxygen reduction reaction evaluated in a MEA setup. We summarize this review by laying out existing challenges and offering perspective on future research directions toward practicing intermetallic electrocatalysts for energy conversions.
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Affiliation(s)
- Fangxu Lin
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
- Beijing Innovation Centre for Engineering Science and Advanced Technology, Peking University, Beijing 100871, China
| | - Menggang Li
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Lingyou Zeng
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Mingchuan Luo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Shaojun Guo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
- Beijing Innovation Centre for Engineering Science and Advanced Technology, Peking University, Beijing 100871, China
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4
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Rigo VA, Baletto F. Pt 38 as a promising ethanol catalyst: a first principles study. Phys Chem Chem Phys 2023; 25:4649-4655. [PMID: 36722856 DOI: 10.1039/d2cp04323h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This first-principles study predicts Pt38 nanoparticles as a catalyst for ethanol reactions. Starting from the adsorption properties, we shed light on the effectiveness of Pt-based nanoclusters as ethanol catalysts. First, the ethanol adsorption on Pt38 shows that the most stable site positions the molecule with the oxygen anchored on top of an edge, whereas CH3 is oriented towards the facet and the molecule remains in trans-symmetry. The ethanol-oxygen adsorbed on top of a facet Pt-atom offers the least stable configuration and the longer Pt-O distance (2.318 Å), while the shorter Pt-O distance (2.237 Å) is found when ethanol is on top of an edge site and the molecule is vertically oriented with Gauche symmetry. A shorter Pt-O distance correlates with higher radial breathing of the nanoparticle after ethanol adsorption. Atomic charge redistribution is calculated on all the considered systems and cases. In any event, we show that the Pt-anchor receives a charge, whilst oxygen-ethanol donates electrons. Orbital analysis shows that Pt-anchors and ethanol-oxygen atoms primarily exchange p-charge. Energy barriers associated with the ethanol bond cleavage show that the C-C bond break is slightly more favourable on Pt38 than on an extended Pt(111). In addition, we find that the cleavage of the hydroxyl O-H ethanol bond shows a higher energy barrier while the removal of an H-atom from the CH3 group is easier. These three facts indicate that the Pt38 nanoparticle enhances ethanol catalysis and hence is a good candidate for ethanol-based fuel cells.
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Affiliation(s)
- Vagner Alexandre Rigo
- Department of Natural Sciences, Universidade Tecnológica Federal do Paraná (UTFPR), Cornélio Procópio, 86300-000, Brazil.
| | - Francesca Baletto
- Physics Department, University of Milan, Via Celoria 16, 20133, Italy.,Physics Department, King's College London, Strand WC2R 2LS, UK
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5
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Gomes BF, Prokop M, Bystron T, Loukrakpam R, Melke J, Lobo CMS, Fink M, Zhu M, Voloshina E, Kutter M, Hoffmann H, Yusenko KV, Buzanich AG, Röder B, Bouzek K, Paulus B, Roth C. Following Adsorbed Intermediates on a Platinum Gas Diffusion Electrode in H 3PO 3-Containing Electrolytes Using In Situ X-ray Absorption Spectroscopy. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bruna F. Gomes
- Chair of Electrochemical Process Engineering, University of Bayreuth, Universitätsstraße 30, Bayreuth 95447, Germany
| | - Martin Prokop
- Department of Inorganic Technology, University of Chemistry and Technology Prague, Technicka 5, Prague 6 166 28, Czech Republic
| | - Tomas Bystron
- Department of Inorganic Technology, University of Chemistry and Technology Prague, Technicka 5, Prague 6 166 28, Czech Republic
| | - Rameshwori Loukrakpam
- Chair of Electrochemical Process Engineering, University of Bayreuth, Universitätsstraße 30, Bayreuth 95447, Germany
| | - Julia Melke
- Department for Applied Electrochemistry, Fraunhofer Institute for Chemical Technology (ICT), Joseph-von-Fraunhofer-Str. 7, Pfinztal 76327, Germany
- Institute of Inorganic and Analytical Chemistry, University of Freiburg, Albertstr. 21, Freiburg 79104, Germany
| | - Carlos M. S. Lobo
- Institute for Technical Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| | - Michael Fink
- Chair of Electrochemical Process Engineering, University of Bayreuth, Universitätsstraße 30, Bayreuth 95447, Germany
| | - Mengshu Zhu
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, Berlin 14195, Germany
| | - Elena Voloshina
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, Berlin 14195, Germany
| | - Maximilian Kutter
- Chair of Electrochemical Process Engineering, University of Bayreuth, Universitätsstraße 30, Bayreuth 95447, Germany
| | - Hendrik Hoffmann
- Chair of Electrochemical Process Engineering, University of Bayreuth, Universitätsstraße 30, Bayreuth 95447, Germany
| | - Kirill V. Yusenko
- Federal Institute for Materials Research and Testing BAM, Richard-Willstätter Str. 11, Berlin D-12489, Germany
| | - Ana Guilherme Buzanich
- Federal Institute for Materials Research and Testing BAM, Richard-Willstätter Str. 11, Berlin D-12489, Germany
| | - Bettina Röder
- Federal Institute for Materials Research and Testing BAM, Richard-Willstätter Str. 11, Berlin D-12489, Germany
| | - Karel Bouzek
- Department of Inorganic Technology, University of Chemistry and Technology Prague, Technicka 5, Prague 6 166 28, Czech Republic
| | - Beate Paulus
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, Berlin 14195, Germany
| | - Christina Roth
- Chair of Electrochemical Process Engineering, University of Bayreuth, Universitätsstraße 30, Bayreuth 95447, Germany
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6
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Chen Q, Peng P, Yang G, Li Y, Han M, Tan Y, Zhang C, Chen J, Jiang K, Liu L, Ye C, Xing E. Template‐Guided Regioselective Encaging of Platinum Single Atoms into Y Zeolite: Enhanced Selectivity in Semihydrogenation and Resistance to Poisoning. Angew Chem Int Ed Engl 2022; 61:e202205978. [DOI: 10.1002/anie.202205978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Qiang Chen
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Pai Peng
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Ganjun Yang
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Yanzhi Li
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Mengxi Han
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Yaozong Tan
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Chengxi Zhang
- State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum Processing, Sinopec Beijing 100083 China
| | - Junwen Chen
- State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum Processing, Sinopec Beijing 100083 China
| | - Kun Jiang
- School of Chemistry and Chemical Engineering Wuhan Textile University Wuhan 430200 China
| | - Lei Liu
- School of Chemistry and Chemical Engineering Wuhan Textile University Wuhan 430200 China
| | - Chenliang Ye
- College of Materials Science and Engineering Shenzhen University Shenzhen 518060 China
| | - Enhui Xing
- State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum Processing, Sinopec Beijing 100083 China
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7
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Chen Q, Peng P, Yang G, Li Y, Han M, Tan Y, Zhang C, Chen J, Jiang K, Liu L, Ye C, Xing E. Template‐Guided Regioselective Encaging of Platinum Single Atoms into Y Zeolite: Enhanced Selectivity in Semihydrogenation and Resistance to Poisoning. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qiang Chen
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Pai Peng
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Ganjun Yang
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Yanzhi Li
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Mengxi Han
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Yaozong Tan
- School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai campus Zhuhai 519082 China
| | - Chengxi Zhang
- State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum Processing, Sinopec Beijing 100083 China
| | - Junwen Chen
- State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum Processing, Sinopec Beijing 100083 China
| | - Kun Jiang
- School of Chemistry and Chemical Engineering Wuhan Textile University Wuhan 430200 China
| | - Lei Liu
- School of Chemistry and Chemical Engineering Wuhan Textile University Wuhan 430200 China
| | - Chenliang Ye
- College of Materials Science and Engineering Shenzhen University Shenzhen 518060 China
| | - Enhui Xing
- State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum Processing, Sinopec Beijing 100083 China
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8
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Laletina SS, Mamatkulov M, Shor AM, Shor EA, Kaichev VV, Yudanov IV. Size and structure effects on platinum nanocatalysts: theoretical insights from methanol dehydrogenation. NANOSCALE 2022; 14:4145-4155. [PMID: 35187555 DOI: 10.1039/d1nr07947f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Methanol dehydrogenation on Pt nanoparticles was studied as a model reaction with the focus on size and structure effects employing the density functional theory approach. The effect of cluster morphology is manifested by the higher adsorption energy of COHx intermediates on vertexes and edges of model nanoparticles compared to closely packed terraces. Moreover, due to the size effect, the adsorption sites of Pt79 nanoparticles (1.2 nm in diameter) exhibit considerably higher adsorption activity than the same sites of Pt201 (1.7 nm). Thus, particles with a size of about 1 nm are shown to be more active due to the superposition of two effects: (i) a higher surface fraction of low-coordinated adsorption sites and (ii) higher activity of these sites compared to particles with a size of about 2 nm.
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Affiliation(s)
- Svetlana S Laletina
- Institute of Chemistry and Chemical Technology (ICCT) of the Siberian Branch of the Russian Academy of Sciences (SB RAS), Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, 660036, Russia.
- Boreskov Institute of Catalysis SB RAS, Novosibirsk, 630090, Russia.
| | | | - Aleksey M Shor
- Institute of Chemistry and Chemical Technology (ICCT) of the Siberian Branch of the Russian Academy of Sciences (SB RAS), Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, 660036, Russia.
| | - Elena A Shor
- Institute of Chemistry and Chemical Technology (ICCT) of the Siberian Branch of the Russian Academy of Sciences (SB RAS), Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, 660036, Russia.
| | - Vasily V Kaichev
- Boreskov Institute of Catalysis SB RAS, Novosibirsk, 630090, Russia.
| | - Ilya V Yudanov
- Boreskov Institute of Catalysis SB RAS, Novosibirsk, 630090, Russia.
- Institute of Solid State Chemistry and Mechanochemistry (ISSCM) SB RAS, Novosibirsk, 630128, Russia
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9
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The ethanol–metal interaction in bimetallic clusters of Pt and Rh. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02877-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Recent Progress on Sulfated Nanozirconia as a Solid Acid Catalyst in the Hydrocracking Reaction. Catalysts 2022. [DOI: 10.3390/catal12020191] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Zirconia has advantageous thermal stability and acid–base properties. The acidity character of ZrO2 can be enhanced through the sulfation process forming sulfated zirconia (ZrO2-SO4). An acidity test of the catalyst produced proved that the sulfate loading succeeded in increasing the acidity of ZrO2 as confirmed by the presence of characteristic absorptions of the sulfate group from the FTIR spectra of the catalyst. The ZrO2-SO4 catalyst can be further modified with transition metals, such as Platinum (Pt), Chromium (Cr), and Nickel (Ni) to increase catalytic activity and catalyst stability. It was observed that variations in the concentrations of Pt, Cr, and Ni produced a strong influence on the catalytic activity as the acidity and porosity of the catalyst increased with their addition. The activity, selectivity, and catalytic stability tests of Pt/ZrO2-SO4, Cr/ZrO2-SO4 and Ni/ZrO2-SO4 were carried out with their application in the hydrocracking reaction to produce liquid fuel. The percentage of liquid fractions produced using these catalysts were higher than the fraction produced using pure ZrO2 and ZrO2-SO4 catalyst.
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11
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Dancini-Pontes I, Pontes RM. Oxygen-platinum interaction in alcohol-platinum clusters: Substituent effect and implications to reactivity. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2021.113546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Hossain MJ, Rahman MS, Sharif MJ. Micromixer: An Effective Tool for the Production of Sub-Nanosized Noble Metal Particles. INTERNATIONAL JOURNAL OF NANOSCIENCE 2020. [DOI: 10.1142/s0219581x20500131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This paper demonstrates the functionality of a simple and convenient microfluidic method in synthesizing a series of poly(vinylpyrrolidone) (PVP) stabilized nanoparticles (NPs) of various novel metals (Pt, Pd, Ru, Rh, Ag, and Au) with an average diameter of [Formula: see text]2 nm. In this method, the use of microfluidic mixture provided a homogenous mixing of the metal precursors and reducing agent nearly at the molecular level, that yield monodispersed sub-nanosize NPs. Core diameters of the produced NPs determined by transmission electron microscopy (TEM), were [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text][Formula: see text]nm for Pt, Pd, Ru, Rh, Ag and Au NPs, respectively. Of them, Pt NPs were detailed characterized. The obtained Pt NPs were found to have fcc crystal structure with 1.2 nm crystalline size which is very similar to the corresponding TEM result. The efficiency of the synthesis of NPs by micromixer was compared with batch/NaBH4 reduction method for the Pt NPs. It was found that in batch method the as-prepared NPs decreased the reducing ability of NaBH4 by catalytic degradation. In contrast, the micromixer could separate the produced metal NPs from the reaction system soon after the formation of NPs and enables feeding the fresh NaBH4 solution throughout the synthesis. Fourier Transform Infrared (FTIR) spectrometry measurements of adsorbed [Formula: see text]CO molecules on Pt NPs showed that the NPs surface were negatively charged with a high population of edge and vertices atoms.
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Affiliation(s)
- M. Jakir Hossain
- Forest Chemistry Division, Bangladesh Forest Research Institute, Chittagong 4211, Bangladesh
| | - Md Saidur Rahman
- Industrial Botany Research Division, Bangladesh Council of Scientific and Industrial Research, Chittagong, Cittagong-4220, Bangladesh
| | - Md Jafar Sharif
- Department of Chemistry, Military Institute of Science & Technology (MIST), Mirpur, Dhaka-1216, Bangladesh
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13
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Ellaby T, Varambhia A, Luo X, Briquet L, Sarwar M, Ozkaya D, Thompsett D, Nellist PD, Skylaris CK. Strain effects in core-shell PtCo nanoparticles: a comparison of experimental observations and computational modelling. Phys Chem Chem Phys 2020; 22:24784-24795. [PMID: 33107513 DOI: 10.1039/d0cp04318d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Strain in Pt nanoalloys induced by the secondary metal has long been suggested as a major contributor to the modification of catalytic properties. Here, we investigate strain in PtCo nanoparticles using a combination of computational modelling and microscopy experiments. We have used a combination of molecular dynamics (MD) and large-scale density functional theory (DFT) for our models, alongside experimental work using annular dark field scanning transmission electron microscopy (ADF-STEM). We have performed extensive validation of the interatomic potential against DFT using a Pt568Co18 nanoparticle. Modelling gives access to 3 dimensional structures that can be compared to the 2D ADF-STEM images, which we use to build an understanding of nanoparticle structure and composition. Strain has been measured for PtCo and pure Pt nanoparticles, with MD annealed models compared to ADF-STEM images. Our analysis was performed on a layer by layer basis, where distinct trends between the Pt and PtCo alloy nanoparticles are observed. To our knowledge, we show for the first time a way in which detailed atomistic simulations can be used to augment and help interpret the results of ADF-STEM strain mapping experiments, which will enhance their use in characterisation towards the development of improved catalysts.
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Affiliation(s)
- Tom Ellaby
- Department of Chemistry, University of Southampton, Southampton, UK.
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14
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Hossain MJ, Rahman MM, Jafar Sharif M. Preference for low-coordination sites by adsorbed CO on small platinum nanoparticles. NANOSCALE ADVANCES 2020; 2:1245-1252. [PMID: 36133035 PMCID: PMC9418823 DOI: 10.1039/c9na00499h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 01/23/2020] [Indexed: 06/16/2023]
Abstract
FTIR spectra of 12CO adsorbed on poly(vinylpyrrolidone) (PVP)-stabilized colloidal platinum at room temperature were acquired and studied. Two new bands, at 2021 cm-1 and 1994 cm-1, were observed for the first time and were assigned to the stretching vibrations of CO linearly adsorbed on the Pt surface at edge and corner sites, respectively. The relative intensities of these two bands were found to vary with the coverage of CO, where the smallest particles showed the highest intensity, corresponding to the relative quantities of edge and corner sites per unit surface. The vibrational spectra signals reported for terrace sites on colloidal Pt red-shifted as the particle size was decreased, which showed the electronic interactions between the Pt surface and PVP, with PVP acting as an electron donor.
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Affiliation(s)
- M Jakir Hossain
- Forest Chemistry Division, Bangladesh Forest Research Institute Chittagong-4211 Bangladesh
| | - M M Rahman
- Department of Chemistry, University of Dhaka Dhaka-1000 Bangladesh
| | - Md Jafar Sharif
- Department of Chemistry, Military Institute of Science & Technology (MIST) Mirpur Dhaka-1216 Bangladesh
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15
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Sarwar M, Gavartin JL, Martinez Bonastre A, Garcia Lopez S, Thompsett D, Ball SC, Krzystala A, Goldbeck G, French SA. Exploring fuel cell cathode materials using ab initio high throughput calculations and validation using carbon supported Pt alloy catalysts. Phys Chem Chem Phys 2020; 22:5902-5914. [PMID: 32109268 DOI: 10.1039/d0cp00301h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We employ a combined density functional theory (DFT) and experimental approach to screen different elements (M) and Pt3M alloys (M = Sc, Y, V, Nb, Ta, Ti, Zr, Hf, Cr, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Cu, Ag, Au and Al) for oxygen reduction reaction (ORR) activity and stability. The results of the calculations are validated using a series of carbon supported alloy nanoparticles measured within membrane electrode assembly (MEA) environments. We assess the reliability of descriptors such as surface d-band centre and O adsorption energy as computed from DFT calculations. We also assess the stability of the alloy surfaces under different adsorbate environments as encountered under ORR conditions. Our calculations predict that under an oxygen atmosphere segregation of M to the surface is likely to occur. The calculated segregation energies correlate reasonably well with the amount of base metal leached in the carbon-supported catalysts and good correlation of computed O adsorption energies with ORR activity is also shown.
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Affiliation(s)
- Misbah Sarwar
- Johnson Matthey Technology Centre, Blounts Court, Sonning Common, Reading, RG4, 7QE, UK.
| | - Jacob L Gavartin
- Accelrys (now BIOVIA) Ltd, 334 Cambridge Science Park, Cambridge, CB4 0WN, UK
| | - Alex Martinez Bonastre
- Johnson Matthey Technology Centre, Blounts Court, Sonning Common, Reading, RG4, 7QE, UK.
| | - Sonia Garcia Lopez
- Johnson Matthey Technology Centre, Blounts Court, Sonning Common, Reading, RG4, 7QE, UK.
| | - David Thompsett
- Johnson Matthey Technology Centre, Blounts Court, Sonning Common, Reading, RG4, 7QE, UK.
| | - Sarah C Ball
- Johnson Matthey Technology Centre, Blounts Court, Sonning Common, Reading, RG4, 7QE, UK.
| | - Arek Krzystala
- Accelrys (now BIOVIA) Ltd, 334 Cambridge Science Park, Cambridge, CB4 0WN, UK
| | - Gerhard Goldbeck
- Accelrys (now BIOVIA) Ltd, 334 Cambridge Science Park, Cambridge, CB4 0WN, UK
| | - Samuel A French
- Johnson Matthey Technology Centre, Blounts Court, Sonning Common, Reading, RG4, 7QE, UK.
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16
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A DFT/EDA study of ethanol decomposition over Pt, Cu and Rh metal clusters. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2019.110694] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Schmidt D, Asara GG, Baletto F. A kinetic Monte Carlo-blueprint for oxygen reduction on oxide-supported PtNi nanoalloys. J Chem Phys 2020; 152:034107. [PMID: 31968968 DOI: 10.1063/1.5129670] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
To elucidate the effect of the architecture of supported bimetallic nanocatalysts, we developed a new lattice kinetic Monte Carlo based on the classifying and counting adsorption sites with respect to their generalized coordination number. We employed this tool to estimate the activity of MgO-supported PtNi nanoalloys for oxygen reduction. We demonstrated that the presence of Ni atoms in contact with the substrate massively enhances their activity with at least a 7-order of magnitude increase in the turnover of water production with respect to the case where only Pt lay at the interface. We further discussed how the nanoalloy shape affects the activity showing that truncated octahedra are 102 more active than cuboctahedra of similar size. We explained our results in terms of their distinct distribution and occurrence of the most active sites for oxygen reduction leading to the stabilization of different chemical species during the reaction dynamics. Our results suggest that engineering multifaceted and long edge PtNi-nanoalloys with a certain chemical ordering at the support interface would improve their catalytic performance for the oxygen reduction reaction.
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Affiliation(s)
- D Schmidt
- Department of Physics and Astronomy, University College London, London, United Kingdom
| | - G G Asara
- Department of Physics, King's College London, London, United Kingdom
| | - F Baletto
- Department of Physics, King's College London, London, United Kingdom
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18
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Fernández E, Liu L, Boronat M, Arenal R, Concepcion P, Corma A. Low-Temperature Catalytic NO Reduction with CO by Subnanometric Pt Clusters. ACS Catal 2019; 9:11530-11541. [PMID: 31840009 PMCID: PMC6902616 DOI: 10.1021/acscatal.9b03207] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 10/08/2019] [Indexed: 11/28/2022]
Abstract
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The catalytic subnanometric metal clusters with a few
atoms can
be regarded as an intermediate state between single atoms and metal
nanoparticles (>1 nm). Their molecule-like electronic structures
and
flexible geometric structures bring rich chemistry and also a different
catalytic behavior, in comparison with the single-atom or nanoparticulate
counterparts. In this work, by combination of operando IR spectroscopy
techniques and electronic structure calculations, we will show a comparative
study on Pt catalysts for CO + NO reaction at a very low temperature
range (140–200 K). It has been found that single Pt atoms immobilized
on MCM-22 zeolite are not stable under reaction conditions and agglomerate
into Pt nanoclusters and particles, which are the working active sites
for CO + NO reaction. In the case of the catalyst containing Pt nanoparticles
(∼2 nm), the oxidation of CO to CO2 occurs in a
much lower extension, and Pt nanoparticles become poisoned under reaction
conditions because of a strong interaction with CO and NO. Therefore,
only subnanometric Pt clusters allow NO dissociation at a low temperature
and CO oxidation to occur well on the surface, while CO interaction
is weak enough to avoid catalyst poisoning, resulting in a good balance
to achieve enhanced catalytic performance.
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Affiliation(s)
- Estefanía Fernández
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Lichen Liu
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Mercedes Boronat
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Raul Arenal
- Laboratorio de Microscopias Avanzadas, Instituto de Nanociencia de Aragon, Universidad de Zaragoza, Mariano Esquillor Edificio I + D, 50018 Zaragoza, Spain
- ARAID Foundation, 50018 Zaragoza, Spain
- Instituto de Ciencias de Materiales de Aragon, CSIC-Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Patricia Concepcion
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Avelino Corma
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Av. de los Naranjos s/n, 46022 Valencia, Spain
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Gerber IC, Serp P. A Theory/Experience Description of Support Effects in Carbon-Supported Catalysts. Chem Rev 2019; 120:1250-1349. [DOI: 10.1021/acs.chemrev.9b00209] [Citation(s) in RCA: 274] [Impact Index Per Article: 54.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Iann C. Gerber
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 avenue de Rangueil, F-31077 Toulouse, France
| | - Philippe Serp
- LCC-CNRS, Université de Toulouse, UPR 8241 CNRS, INPT, 31400 Toulouse, France
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Ellaby T, Briquet L, Sarwar M, Thompsett D, Skylaris CK. Modification of O and CO binding on Pt nanoparticles due to electronic and structural effects of titania supports. J Chem Phys 2019; 151:114702. [DOI: 10.1063/1.5120571] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Tom Ellaby
- Department of Chemistry, University of Southampton, Southampton, United Kingdom
| | - Ludovic Briquet
- Johnson Matthey Technology Centre,
Blounts Court, Sonning Common, Reading RG4 9NH, United Kingdom
| | - Misbah Sarwar
- Johnson Matthey Technology Centre,
Blounts Court, Sonning Common, Reading RG4 9NH, United Kingdom
| | - David Thompsett
- Johnson Matthey Technology Centre,
Blounts Court, Sonning Common, Reading RG4 9NH, United Kingdom
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21
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Rossi K, Asara GG, Baletto F. A genomic characterisation of monometallic nanoparticles. Phys Chem Chem Phys 2019; 21:4888-4898. [DOI: 10.1039/c8cp05720f] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A “genomic” description of monometallic nanoparticles could help to design more efficient nanocatalysts.
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Affiliation(s)
- Kevin Rossi
- Physics Department
- King's College London
- Strand
- UK
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