1
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Mancera LA, Groß A, Behm RJ. Stability, electronic properties and CO adsorption properties of bimetallic PtAg/Pt(111) surfaces. Phys Chem Chem Phys 2024; 26:18435-18448. [PMID: 38916054 DOI: 10.1039/d4cp01640h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Aiming at a better fundamental understanding of the chemistry of bimetallic PtAg/Pt(111) surfaces, we have investigated the stability, electronic properties and CO adsorption properties of bimetallic PtAg surfaces, including pseudomorphic Ag film covered Pt(111) surfaces and PtxAg1-x/Pt(111) monolayer surface alloys, using periodic density functional theory calculations. The data provide detailed insights into the relative stabilities of different surface configurations, as indicated by their formation enthalpies and surface energies, and changes in their electronic properties, i.e., in the projected local densities of states and shifts in the d-band center. The adsorption properties of different Ptn ensembles were systematically tested using CO as a probe molecule. In addition to electronic ligand and strain effects, we were particularly interested in the role of different adsorption sites and of the local COad coverage, given by the number of CO molecules per Pt surface atom in the Ptn ensemble. Different from PdAg surfaces, variations in the adsorption energy with adsorption sites and with increasing local coverage are small up to one COad per Pt surface atom. Finally, formation of multicarbonyl species with more than one COad per Pt surface atom was tested for separated Pt1 monomers and can be excluded at finite temperatures. General trends and aspects are derived by comparison with comparable data for PdAg bimetallic surfaces. Fundamental insights relevant for applications of bimetallic Pt catalysts, specifically PtAg catalysts, are briefly discussed.
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Affiliation(s)
- Luis A Mancera
- Institute of Theoretical Chemistry, Ulm University, Oberberghof 7, D-89081 Ulm, Germany.
| | - Axel Groß
- Institute of Theoretical Chemistry, Ulm University, Oberberghof 7, D-89081 Ulm, Germany.
| | - R Jürgen Behm
- Institute of Theoretical Chemistry, Ulm University, Oberberghof 7, D-89081 Ulm, Germany.
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2
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Liu T, Peng T, Fu B, Zhang DH. Six-dimensional quantum dynamics study for the dissociative chemisorption of H2 on pure and alloyed AgAu surfaces. J Chem Phys 2024; 160:014703. [PMID: 38168693 DOI: 10.1063/5.0187233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Accepted: 12/07/2023] [Indexed: 01/05/2024] Open
Abstract
The 6D time-dependent wave packet calculations were performed to explore H2 dissociation on Ag, Au, and two AgAu alloy surfaces, using four newly fitted potential energy surfaces based on the neural network fitting to density functional theory energy points. The ligand effect resulting from the Ag-Au interaction causes a reduction in the barrier height for H2+Ag/Au(111) compared to H2+Ag(111). However, the scenario is reversed for H2+Au/Ag(111) and H2+Au(111). The 6D dissociation probabilities of H2 on Ag/Au(111) surfaces are significantly higher than those on the pure Ag(111) surface, but the corresponding results for H2 on Au/Ag(111) surfaces are substantially lower than those on the pure Au(111) surface. The reactivity of H2 on Au(111) is larger than that on Ag(111), despite Ag(111) having a slightly lower static barrier height. This can be attributed to the exceptionally small dissociation probabilities at the hcp and fcc regions, which are at least 100 times smaller compared to those at the bridge or top site for H2+Ag(111). Due to the late barrier being more pronounced, the vibrational excitation of H2 on Ag(111) is more effective in promoting the reaction than on Au(111). Moreover, a high degree of alignment dependence is detected for the four reactions, where the H2 dissociation has the highest probability at the helicopter alignment, as opposed to the cartwheel alignment.
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Affiliation(s)
- Tianhui Liu
- School of Sciences, Great Bay University, Songshan Lake International Innovation Entrepreneurship Community A5, Dongguan 523000, China
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Tianze Peng
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Bina Fu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Hefei National Laboratory, Hefei 230088, China
| | - Dong H Zhang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Hefei National Laboratory, Hefei 230088, China
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3
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Liu T, Peng T, Fu B, Zhang DH. Charge-Transfer-Controlled Quantum Dynamics of HCl Dissociation on the Ag/Au(111) Bimetallic Alloy Surface. J Phys Chem Lett 2023; 14:9713-9719. [PMID: 37877754 DOI: 10.1021/acs.jpclett.3c02556] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Understanding polar molecule dynamics on bimetallic surfaces, especially electropositivity and electronegativity, remains a challenge. Here, we report the reactivity of HCl on a strained Ag monolayer on Au(111) using six-dimensional quantum dynamics with a new machine-learning-based potential energy surface. Surprisingly, HCl reactivity is significantly suppressed by the Ag-Au interaction despite a lower HCl+Ag/Au(111) barrier than pure Ag(111). This arises from charge transfer between Ag and Au, where electronegative Au makes the top Ag layer on Ag/Au(111) electropositive, unlike that on pure Ag(111). Electropositive Ag in HCl+Ag/Au(111) attracts Cl, yielding an unfavorable H-Cl configuration and reduced reactivity. These findings deepen our understanding of polar molecule interactions on bimetallic surfaces, highlighting the role of charge transfer in dissociative chemisorption and the implications for catalyst design in heterogeneous catalysis.
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Affiliation(s)
- Tianhui Liu
- School of Sciences, Great Bay University, Songshan Lake International Innovation Entrepreneurship Community A5, Dongguan 523000, China
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Tianze Peng
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Bina Fu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Hefei National Laboratory, Hefei 230088, China
| | - Dong H Zhang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Hefei National Laboratory, Hefei 230088, China
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4
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Liu T, Shi H, Fu B, Zhang DH. Quantum dynamics reveal different ligand effects by vibrational excitation in the dissociative chemisorption of HCl on the Au/Ag(111) surface. J Chem Phys 2022; 157:244702. [PMID: 36586991 DOI: 10.1063/5.0131503] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The reactivity and selectivity of bimetallic surfaces are of fundamental importance in industrial applications. Here, we report the first six-dimensional (6D) quantum dynamics study for the role of surface strain and ligand effects on the reactivity of HCl on a strained pseudomorphic monolayer of Au deposited onto a Ag(111) substrate, with the aid of accurate machine learning-based potential energy surfaces. The substitute of Au into Ag changes the location of the transition state; however, the static barrier height remains roughly the same as pure Au(111). The 6D quantum dynamics calculations reveal that the surface strain due to lattice expansion slightly enhances the reactivity. The ligand effect due to electronic structure interactions between Au and Ag substantially suppresses the reactivity of HCl in the ground vibrational state but promotes the reactivity via vibrational excitation at high kinetic energies. This finding can be attributed to more close interaction with Ag atoms at the transition state close to the fcc site, as well as the tight transition-state region, making the vibrational excitation highly efficient in enhancing the reactivity. Our study quantitatively unravels the dynamical origin of reactivity control by two metals, which will ultimately provide valuable insight into the selectivity of the catalyst.
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Affiliation(s)
- Tianhui Liu
- State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical and Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
| | - Huixia Shi
- State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical and Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
| | - Bina Fu
- State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical and Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
| | - Dong H Zhang
- State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical and Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
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5
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Kumar P, Monder DS. Electronic structure and catalytic activity of exsolved Ni on Pd core-shell nanoparticles. Phys Chem Chem Phys 2022; 24:29801-29816. [PMID: 36468269 DOI: 10.1039/d2cp04133b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study reports first principles calculations performed to study the electronic structure and catalytic activity of exsolved Ni on Pd core-shell catalysts reported in recent experimental literature. The modification in the electronic and geometric properties of the Ni/Pd bimetallic system as successive layers of Ni are added on top of Pd is systematically investigated using the d-band model as well as the adsorption of O and CO on the surface of these core-shell structures. The results show that the adsorption of O and CO is more favourable on Ni/Pd core-shell catalysts compared to the pure Ni surface. As the dissociation of the O2 molecule into atomic oxygen and CO oxidation are key steps in metal-catalysed oxidation reactions, we have examined the energetics of O2 dissociation and CO oxidation reaction over the (111) faces of Ni as well as Ni/Pd structures. Our results suggest that both adsorption and dissociation are easier on Ni/Pd surfaces compared to a simple Ni surface. Unlike O2 dissociation, we find that CO oxidation is unfavourable on Ni/Pd in comparison to Ni. The energetics of both reactions follow Brønsted-Evans-Polanyi relationships where the activation energy is linearly related to the reaction energy for all surfaces studied here. We found that a single monolayer of Ni on Pd, due to the synergistic effect of geometric and electronic factors, is the most active among the surfaces studied here towards the adsorption and dissociation of O2. Both adsorption and dissociation become less favourable with an increase in the thickness of the Ni shell in these core-shell catalysts. A close analysis of the results indicates that both strain and ligand effects are active in the improved catalytic activity seen in Ni on Pd catalysts. Quite understandably, the ligand effect is only seen for the single monolayer of Ni on Pd and fades off as we go to two monolayers of Ni. The results reported here help us understand the connections between the electronic structure and catalytic activity of Ni/Pd core-shell nanoparticles, and these insights are expected to be useful in the development of core-shell catalysts.
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Affiliation(s)
- Punit Kumar
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
| | - Dayadeep S Monder
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
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6
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Mosali VSS, Bond AM, Zhang J. Alloying strategies for tuning product selectivity during electrochemical CO 2 reduction over Cu. NANOSCALE 2022; 14:15560-15585. [PMID: 36254597 DOI: 10.1039/d2nr03539a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Excessive reliance on fossil fuels has led to the release and accumulation of large quantities of CO2 into the atmosphere which has raised serious concerns related to environmental pollution and global warming. One way to mitigate this problem is to electrochemically recycle CO2 to value-added chemicals or fuels using electricity from renewable energy sources. Cu is the only metallic electrocatalyst that has been shown to produce a wide range of industrially important chemicals at appreciable rates. However, low product selectivity is a fundamental issue limiting commercial applications of electrochemical CO2 reduction over Cu catalysts. Combining copper with other metals that actively contribute to the electrochemical CO2 reduction reaction process can selectively facilitate generation of desirable products. Alloying Cu can alter surface binding strength through electronic and geometric effects, enhancing the availability of surface confined carbon species, and stabilising key reduction intermediates. As a result, significant research has been undertaken to design and fabricate copper-based alloy catalysts with structures that can enhance the selectivity of targeted products. In this article, progress with use of alloying strategies for development of Cu-alloy catalysts are reviewed. Challenges in achieving high selectivity and possible future directions for development of new copper-based alloy catalysts are considered.
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Affiliation(s)
| | - Alan M Bond
- School of Chemistry, Monash University, Clayton 3800, Victoria, Australia.
- ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton 3800, Victoria, Australia
| | - Jie Zhang
- School of Chemistry, Monash University, Clayton 3800, Victoria, Australia.
- ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton 3800, Victoria, Australia
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7
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Halim H, Morikawa Y. Elucidation of Cu-Zn Surface Alloying on Cu(997) by Machine-Learning Molecular Dynamics. ACS PHYSICAL CHEMISTRY AU 2022; 2:430-447. [PMID: 36855689 PMCID: PMC9955186 DOI: 10.1021/acsphyschemau.2c00017] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Cu-Zn surface alloy has been extensively involved in the investigation of the true active site of Cu/ZnO/Al2O3, the industrial catalyst for methanol synthesis which remains under controversy. The challenge lies in capturing the interplay between the surface and reaction under operating conditions, which can be overcome given that the explicit dynamics of the system is known. To provide a better understanding of the dynamic of Cu-Zn surface at the atomic level, the structure and the formation process of the Cu-Zn surface alloy on Cu(997) were investigated by machine-learning molecular dynamics (MD). Gaussian process regression aided with on-the-fly learning was employed to build the force field used in the MD. The simulation reveals atomistic details of the alloying process, that is, the incorporation of deposited Zn adatoms to the Cu substrate. The surface alloying is found to start at upper and lower terraces near the step edge, which emphasize the role of steps and kinks in the alloying. The incorporation of Zn at the middle terrace was found at the later stage of the simulation. The rationalization of alloying behavior was performed based on statistics and barriers of various elementary events that occur during the simulation. It was observed that the alloying scheme at the upper terrace is dominated by the confinement of Zn step adatoms by other adatoms, highlighting the importance of step fluctuations in the alloying process. On the other hand, the alloying scheme at the lower terrace is dominated by direct exchange between the Zn step adatom and the Cu atom underneath. The alloying at the middle terrace is dominated by the wave deposition mechanism and deep confinement of Zn adatoms. The short propagation of alloyed Zn in the middle terrace was observed to proceed by means of indirect exchange instead of local exchange as proposed in the previous scanning tunneling microscopy (STM) observation. The comparison of migration rate and activation energies to the result of STM observation is also made. We have found that at a certain distance from the surface, the STM tip significantly affects the elementary events such as vacancy formation and direct exchange.
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Affiliation(s)
- Harry
H. Halim
- Department
of Precision Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka565-0871, Japan
| | - Yoshitada Morikawa
- Department
of Precision Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka565-0871, Japan,Elements
Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Goryo-Ohara, Nishikyo-ku, Kyoto615-8245, Japan,Research
Center for Precision Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka565-0871, Japan,
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8
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Dokhlikova NV, Gatin AK, Sarvadiy SY, Ozerin SA, Rudenko EI, Grishin MV, Shub BR. Simulation of Hydrogen Adsorption on AunNim, AunCum, and CunNim Clusters; n + m = 13. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2022. [DOI: 10.1134/s1990793122020166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Hua M, Tian X, Li S, Lin X. PdAg/Ag(111) Surface Alloys: A Highly Efficient Catalyst of Oxygen Reduction Reaction. NANOMATERIALS 2022; 12:nano12111802. [PMID: 35683658 PMCID: PMC9182455 DOI: 10.3390/nano12111802] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 05/22/2022] [Accepted: 05/23/2022] [Indexed: 02/01/2023]
Abstract
In this article, the behavior of various Pd ensembles on the PdAg(111) surfaces was systematically investigated for oxygen reduction reaction (ORR) intermediates using density functional theory (DFT) simulation. The Pd monomer on the PdAg(111) surface (with a Pd subsurface layer) has the best predicted performance, with a higher limiting potential (0.82 V) than Pt(111) (0.80 V). It could be explained by the subsurface coordination, which was also proven by the analysis of electronic properties. In this case, it is necessary to consider the influence of the near-surface layers when modeling the single-atom alloy (SAA) catalyst processes. Another important advantage of PdAg SAA is that atomic-dispersed Pd as adsorption sites can significantly improve the resistance to CO poisoning. Furthermore, by adjusting the Pd ensembles on the catalyst surface, an exciting ORR catalyst combination with predicted activity and high tolerance to CO poisoning can be designed.
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10
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Structure of PtRu/Ru(0 0 0 1) and AgPd/Pd(1 1 1) surface alloys: A kinetic Monte Carlo study. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2021.111428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Hua M, Tian X, Li S, Zhang X, Shao A, Song L, Lin X. A casting combined quenching strategy to prepare PdAg single atom alloys designed using the cluster expansion combined Monte Carlo method. Phys Chem Chem Phys 2022; 24:2251-2264. [PMID: 35014663 DOI: 10.1039/d1cp05046j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, the surface structure of a PdAg alloy is investigated by cluster expansion (CE) combined Monte Carlo (MC) simulations. All systems with different component proportions show an obvious component segregation corresponding to the depth from the surface. A significant amount of Ag is observed on the first layer, and Pd is concentrated significantly on the second layer. The Pd distribution on the PdAg surfaces is closely related to the temperature and composition ascribed to the concentration and configurational entropy effects, which are explicitly treated in MC simulations. The vacancies mainly distribute separately. The simulation results show good agreement with the experimental evidence. Moreover, we demonstrated a general and highly effective casting combined quenching strategy for controlling the ensemble size and chemical composition of alloy surfaces which could successfully be applied to the large-scale production of SAA.
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Affiliation(s)
- Minghao Hua
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, 250061, Jinan, China.
| | - Xuelei Tian
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, 250061, Jinan, China.
| | - Shuo Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, 250061, Jinan, China.
| | - Xiaofu Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, 250061, Jinan, China. .,School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Anchen Shao
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, 250061, Jinan, China.
| | - Lin Song
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, 250061, Jinan, China. .,Shandong Laboratory of Yantai Advanced Materials and Green Manufacture, Yantai, Shandong Province, 2640000, China
| | - Xiaohang Lin
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, 250061, Jinan, China.
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12
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Hua M, Tian X, Li S, Shao A, Lin X. Theoretical design of platinum-sliver single atom alloy catalyst with CO adsorbate-induced surface structures. Phys Chem Chem Phys 2022; 24:19488-19501. [DOI: 10.1039/d2cp02107b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, by combining density functional theory calculations and Monte Carlo simulations with cluster expansion Hamiltonian methods, we investigate the surface aggregation of Pt atoms on the Pt/Ag(111) surface...
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13
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Bukhtiyarov AV, Prosvirin IP, Panafidin MA, Fedorov AY, Klyushin AY, Knop-Gericke A, Zubavichus YV, Bukhtiyarov VI. Near-Ambient Pressure XPS and MS Study of CO Oxidation over Model Pd-Au/HOPG Catalysts: The Effect of the Metal Ratio. NANOMATERIALS 2021; 11:nano11123292. [PMID: 34947641 PMCID: PMC8703420 DOI: 10.3390/nano11123292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 11/16/2022]
Abstract
In this study, the dependence of the catalytic activity of highly oriented pyrolytic graphite (HOPG)-supported bimetallic Pd-Au catalysts towards the CO oxidation based on the Pd/Au atomic ratio was investigated. The activities of two model catalysts differing from each other in the initial Pd/Au atomic ratios appeared as distinctly different in terms of their ignition temperatures. More specifically, the PdAu-2 sample with a lower Pd/Au surface ratio (~0.75) was already active at temperatures less than 150 °C, while the PdAu-1 sample with a higher Pd/Au surface ratio (~1.0) became active only at temperatures above 200 °C. NAP XPS revealed that the exposure of the catalysts to a reaction mixture at RT induces the palladium surface segregation accompanied by an enrichment of the near-surface regions of the two-component Pd-Au alloy nanoparticles with Pd due to adsorption of CO on palladium atoms. The segregation extent depends on the initial Pd/Au surface ratio. The difference in activity between these two catalysts is determined by the presence or higher concentration of specific active Pd sites on the surface of bimetallic particles, i.e., by the ensemble effect. Upon cooling the sample down to room temperature, the reverse redistribution of the atomic composition within near-surface regions occurs, which switches the catalyst back into inactive state. This observation strongly suggests that the optimum active sites emerge under reaction conditions exclusively, involving both high temperature and a reactive atmosphere.
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Affiliation(s)
- Andrey V. Bukhtiyarov
- Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, 630559 Kol’tsovo, Russia; (M.A.P.); (Y.V.Z.)
- Correspondence: ; Tel.: +7-383-326-97-87
| | - Igor P. Prosvirin
- Department of Physicochemical Techniques, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, Russia; (I.P.P.); (A.Y.F.); (V.I.B.)
| | - Maxim A. Panafidin
- Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, 630559 Kol’tsovo, Russia; (M.A.P.); (Y.V.Z.)
| | - Alexey Yu. Fedorov
- Department of Physicochemical Techniques, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, Russia; (I.P.P.); (A.Y.F.); (V.I.B.)
- Department of Natural Sciences, Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Alexander Yu. Klyushin
- Inorganic Chemistry Department, Fritz Haber Institute of the Max Planck Society, 14195 Berlin, Germany; (A.Y.K.); (A.K.-G.)
- BESSY II, Helmholtz Center for Materials and Energy, 12489 Berlin, Germany
| | - Axel Knop-Gericke
- Inorganic Chemistry Department, Fritz Haber Institute of the Max Planck Society, 14195 Berlin, Germany; (A.Y.K.); (A.K.-G.)
- Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, 45470 Mülheim an der Ruhr, Germany
| | - Yan V. Zubavichus
- Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, 630559 Kol’tsovo, Russia; (M.A.P.); (Y.V.Z.)
| | - Valery I. Bukhtiyarov
- Department of Physicochemical Techniques, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, Russia; (I.P.P.); (A.Y.F.); (V.I.B.)
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14
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Xie L, Liang J, Priest C, Wang T, Ding D, Wu G, Li Q. Engineering the atomic arrangement of bimetallic catalysts for electrochemical CO 2 reduction. Chem Commun (Camb) 2021; 57:1839-1854. [PMID: 33527108 DOI: 10.1039/d0cc07589b] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The electrochemical CO2 reduction reaction (CO2RR) to form highly valued chemicals is a sustainable solution to address the environmental issues caused by excessive CO2 emissions. Generally, it is challenging to achieve high efficiency and selectivity simultaneously in the CO2RR due to multi-proton/electron transfer processes and complex reaction intermediates. Among the studied formulations, bimetallic catalysts have attracted significant attention with promising activity, selectivity, and stability. Engineering the atomic arrangement of bimetallic nanocatalysts is a promising strategy for the rational design of structures (intermetallic, core/shell, and phase-separated structures) to improve catalytic performance. This review summarizes the recent advances, challenges, and opportunities in developing bimetallic catalysts for the CO2RR. In particular, we firstly introduce the possible reaction pathways on bimetallic catalysts concerning the geometric and electronic properties of intermetallic, core/shell, and phase-separated structures at the atomic level. Then, we critically examine recent advances in crystalline structure engineering for bimetallic catalysts, aiming to establish the correlations between structures and catalytic properties. Finally, we provide a perspective on future research directions, emphasizing current challenges and opportunities.
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Affiliation(s)
- Linfeng Xie
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Jiashun Liang
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Cameron Priest
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA. and Idaho National Laboratory, Idaho Falls, ID 83415, USA.
| | - Tanyuan Wang
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Dong Ding
- Idaho National Laboratory, Idaho Falls, ID 83415, USA.
| | - Gang Wu
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.
| | - Qing Li
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
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15
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Abstract
The unprecedented ability of computations to probe atomic-level details of catalytic systems holds immense promise for the fundamentals-based bottom-up design of novel heterogeneous catalysts, which are at the heart of the chemical and energy sectors of industry. Here, we critically analyze recent advances in computational heterogeneous catalysis. First, we will survey the progress in electronic structure methods and atomistic catalyst models employed, which have enabled the catalysis community to build increasingly intricate, realistic, and accurate models of the active sites of supported transition-metal catalysts. We then review developments in microkinetic modeling, specifically mean-field microkinetic models and kinetic Monte Carlo simulations, which bridge the gap between nanoscale computational insights and macroscale experimental kinetics data with increasing fidelity. We finally review the advancements in theoretical methods for accelerating catalyst design and discovery. Throughout the review, we provide ample examples of applications, discuss remaining challenges, and provide our outlook for the near future.
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Affiliation(s)
- Benjamin W J Chen
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Lang Xu
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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16
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Mahlberg D, Groß A. Vacancy assisted diffusion on single-atom surface alloys. Chemphyschem 2020; 22:29-39. [PMID: 33197083 PMCID: PMC7839753 DOI: 10.1002/cphc.202000838] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/13/2020] [Indexed: 11/08/2022]
Abstract
Bimetallic surfaces can exhibit an improved catalytic activity through tailoring the concentration and/or the arrangement of the two metallic components. However, in order to be catalytically active, the active bimetallic surface structure has to be stable under operating conditions. Typically, structural changes in metals occur via vacancy diffusion. Based on the first-principles determination of formation energies and diffusion barriers we have performed kinetic Monte-Carlo (kMC) simulations to analyse the (meta-)stability of PtRu/Ru(0001), AgPd/Pd(111), PtAu/Au(111) and InCu/Cu(100) surface alloys. In a first step, here we consider single-atom alloys together with one vacancy per simulation cell. We will present results of the time evolution of these structures and analyse them in terms of the interaction between the constituents of the bimetallic surface.
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Affiliation(s)
- David Mahlberg
- Institute of Theoretical Chemistry, Ulm University, 89069, Ulm, Germany
| | - Axel Groß
- Institute of Theoretical Chemistry, Ulm University, 89069, Ulm, Germany.,Helmholtz Institute Ulm (HIU), Electrochemical Energy Storage, 89069, Ulm, Germany
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17
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Wang Y, Chen L, Hou CC, Wei YS, Xu Q. Multiple catalytic sites in MOF-based hybrid catalysts for organic reactions. Org Biomol Chem 2020; 18:8508-8525. [PMID: 33043331 DOI: 10.1039/d0ob01729a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Hybrid catalysis provides an effective pathway to improve the catalytic efficiency and simplify the synthesis operation, but multiple catalytic sites are required. Catalysts with multiple functions based on/derived from metal-organic frameworks (MOFs) have received growing attention in organic synthesis due to their wide variety and outstanding designability. This review provides an overview of significant advances in the field of organic reactions by MOF-based hybrid catalysts with emphasis on multiple catalytic sites and their synergies, including inherent sites on host frameworks, sites of MOF composites and metal sites in/on MOF-derived hybrid catalysts.
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Affiliation(s)
- Yu Wang
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Sakyo-ku, Kyoto 606-8501, Japan.
| | - Liyu Chen
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Sakyo-ku, Kyoto 606-8501, Japan.
| | - Chun-Chao Hou
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Sakyo-ku, Kyoto 606-8501, Japan.
| | - Yong-Sheng Wei
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Sakyo-ku, Kyoto 606-8501, Japan.
| | - Qiang Xu
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Sakyo-ku, Kyoto 606-8501, Japan. and School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
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18
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Dokhlikova NV, Gatin AK, Sarvadii SY, Rudenko EI, Grishin MV, Shub BR. The Adsorption of Hydrogen on AunNim and AunCum Clusters (n + m = 13): Quantum-Chemical Simulation. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2020. [DOI: 10.1134/s1990793120050036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Roy S, K. J. N, Tiwari N, Tiwari AK. Energetics and dynamics of CH4 and H2O dissociation on metal surfaces. INT REV PHYS CHEM 2020. [DOI: 10.1080/0144235x.2020.1765598] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Sudipta Roy
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Nayanthara K. J.
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Nidhi Tiwari
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Ashwani K. Tiwari
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
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20
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Wang G, Zhang S, Zhu X, Li C, Shan H. Dehydrogenation versus hydrogenolysis in the reaction of light alkanes over Ni-based catalysts. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.02.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Rao KK, Do QK, Pham K, Maiti D, Grabow LC. Extendable Machine Learning Model for the Stability of Single Atom Alloys. Top Catal 2020. [DOI: 10.1007/s11244-020-01267-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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22
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Scaria J, Nidheesh PV, Kumar MS. Synthesis and applications of various bimetallic nanomaterials in water and wastewater treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 259:110011. [PMID: 32072958 DOI: 10.1016/j.jenvman.2019.110011] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 11/13/2019] [Accepted: 12/16/2019] [Indexed: 05/07/2023]
Abstract
Bimetallic nanoparticles are the complex combination of two different metal constituents in nanoscale. Water and wastewater treatment utilizing bimetallic particles is an emerging research area. When two metals are combined, it can show not only the properties of its constituents but also new and enhanced properties derived by the synergy of the combination. These properties of bimetallic nanoparticles inevitably depend on the size, structure, and morphology of the particles. Thus the adopting synthesis strategy is very crucial to achieve desired results. Here in this review, the various bimetallic synthesis strategies are compared. The bimetallic nanoparticles decontaminate water through adsorption and/or catalysis mechanism. The various degradation pathways, specifically, adsorption, reduction, oxidation, and advanced oxidation processes are discussed in detail in this review.
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Affiliation(s)
- Jaimy Scaria
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - P V Nidheesh
- Environmental Impact and Sustainability Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India.
| | - M Suresh Kumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India; Environmental Impact and Sustainability Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India
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23
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Jena P, Bhattacharya M, Bhattacharjee G, Satpati B, Mukherjee P, Senapati D, Srinivasan R. Bimetallic gold-silver nanoparticles mediate bacterial killing by disrupting the actin cytoskeleton MreB. NANOSCALE 2020; 12:3731-3749. [PMID: 31993609 DOI: 10.1039/c9nr10700b] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The actin cytoskeleton is required for the maintenance of the cell shape and viability of bacteria. It remains unknown to which extent nanoparticles (NPs) can orchestrate the mechanical instability by disrupting the cytoskeletal network in bacterial cells. Our work demonstrates that Au-Ag NPs disrupt the bacterial actin cytoskeleton specifically, fluidize the inner membrane and lead to killing of bacterial cells. In this study, we have tried to emphasize on the key parameters important for NP-cell interactions and found that the shape, specific elemental surface localization and enhanced electrostatic interaction developed due to the acquired partial positive charge by silver atoms in the aggregated NPs are some of the major factors contributing towards better NP interactions and subsequent cell death. In vivo studies in bacterial cells showed that the NPs exerted a mild perturbation of the membrane potential. However, its most striking effect was on the actin cytoskeleton MreB resulting in morphological changes in the bacterial cell shape from rods to predominantly spheres. Exposure to NPs resulted in the delocalization of MreB patches from the membrane but not the tubulin homologue FtsZ. Concomitant with the redistribution of MreB localization, a dramatic increase of membrane fluid regions was observed. Our studies reveal for the first time that Au-Ag NPs can mediate bacterial killing and disrupt the actin cytoskeletal functions in bacteria.
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Affiliation(s)
- Prajna Jena
- Centre for Research in Nanoscience and Nanotechnology, University of Calcutta, JD-2, sector -3, Salt Lake City, Kolkata, India.
| | - Maireyee Bhattacharya
- Chemical Sciences Division, Saha Institute of Nuclear Physics, HBNI, 1/AF, Bidhannagar, Kolkata-700064, India.
| | - Gourab Bhattacharjee
- Surface Physics and Materials Science Division, Saha Institute of Nuclear Physics, HBNI, 1/AF, Bidhannagar, Kolkata-700064, India
| | - Biswarup Satpati
- Surface Physics and Materials Science Division, Saha Institute of Nuclear Physics, HBNI, 1/AF, Bidhannagar, Kolkata-700064, India
| | - Prasun Mukherjee
- Centre for Research in Nanoscience and Nanotechnology, University of Calcutta, JD-2, sector -3, Salt Lake City, Kolkata, India.
| | - Dulal Senapati
- Chemical Sciences Division, Saha Institute of Nuclear Physics, HBNI, 1/AF, Bidhannagar, Kolkata-700064, India.
| | - Ramanujam Srinivasan
- School of Biological Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, Odisha 752050, India.
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24
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Gerrits N, Chadwick H, Kroes GJ. Dynamical Study of the Dissociative Chemisorption of CHD 3 on Pd(111). THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:24013-24023. [PMID: 31602282 PMCID: PMC6778984 DOI: 10.1021/acs.jpcc.9b05757] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/20/2019] [Indexed: 06/10/2023]
Abstract
The specific reaction parameter (SRP) approach to density functional theory has been shown to model reactions of polyatomic molecules with metal surfaces important for heterogeneous catalysis in the industry with chemical accuracy. However, transferability of the SRP functional among systems in which methane interacts with group 10 metals remains unclear for methane + Pd(111). Therefore, in this work, predictions have been made for the reaction of CHD3 on Pd(111) using Born-Oppenheimer molecular dynamics while also performing a rough comparison with experimental data for CH4 + Pd(111) obtained for lower incidence energies. Hopefully, future experiments can test the transferability of the SRP functional among group 10 metals also for Pd(111). We found that the reactivity of CHD3 on Pd(111) is intermediate between and similar to either Pt(111) or Ni(111), depending on the incidence energy and the initial vibrational state distribution. This is surprising because the barrier height and experiments performed at lower incidence energies than investigated here suggest that the reactivity of Pd(111) should be similar to that of Pt(111) only. The relative decrease in the reactivity of Pd(111) at high incidence energies is attributed to site specificity of the reaction and to dynamical effects such as the bobsled effect and energy transfer from methane to the surface.
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Affiliation(s)
- Nick Gerrits
- Gorlaeus
Laboratories, Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, the Netherlands
| | - Helen Chadwick
- Department
of Chemistry, Swansea University, Singleton Park, Swansea SA2 8PP, U.K.
| | - Geert-Jan Kroes
- Gorlaeus
Laboratories, Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, the Netherlands
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25
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26
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Liu P, Qiu W, Zhang C, Tan Q, Zhang C, Zhang W, Song Y, Wang H, Li C. Kinetics of Furfural Hydrogenation over Bimetallic Overlayer Catalysts and the Effect of Oxygen Vacancy Concentration on Product Selectivity. ChemCatChem 2019. [DOI: 10.1002/cctc.201900625] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ping Liu
- School of Chemical EngineeringBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
- School of Chemical EngineeringBeijing University of Chemical Technology Beijing 100029 P.R. China
| | - Weinan Qiu
- School of Chemical EngineeringBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
| | - Chunyang Zhang
- School of Chemical EngineeringBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
| | - Qiqi Tan
- School of Chemical EngineeringBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
| | - Chen Zhang
- School of Chemical EngineeringBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
- Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction TechnologyBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
| | - Wei Zhang
- School of Chemical EngineeringBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
- Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction TechnologyBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
| | - Yongji Song
- School of Chemical EngineeringBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
- Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction TechnologyBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
| | - Hong Wang
- School of Chemical EngineeringBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
- Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction TechnologyBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
| | - Cuiqing Li
- School of Chemical EngineeringBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
- Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction TechnologyBeijing Institute of Petrochemical Technology Beijing 102617 P.R. China
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27
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Klein J, Brimaud S, Engstfeld A, Behm R. Atomic scale insights on the electronic and geometric effects in the electro-oxidation of CO on PtxRu1-x/Ru(0001) surface alloys. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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28
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Probing the surface sensitivity of dimethyl ether oxidation on epitaxially-grown PtRh(1 0 0) alloys: Insights into the challenge of improving on Pt(1 0 0). J Catal 2019. [DOI: 10.1016/j.jcat.2018.11.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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29
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Gerrits N, Migliorini D, Kroes GJ. Dissociation of CHD3 on Cu(111), Cu(211), and single atom alloys of Cu(111). J Chem Phys 2018; 149:224701. [DOI: 10.1063/1.5053990] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Nick Gerrits
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Davide Migliorini
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Geert-Jan Kroes
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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30
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31
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Smolinsky T, von Boehn B, Imbihl R. Chemical waves in the O 2 + H 2 reaction on a Rh(111) surface alloyed with nickel. I. Photoelectron emission microscopy. J Chem Phys 2018; 148:154704. [PMID: 29679958 DOI: 10.1063/1.5020372] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Chemical waves that arise in the H2 + O2 reaction on a bimetallic Rh(111)/Ni surface have been studied in the 10-6 and 10-5 mbar range at T = 773 K with photoelectron emission microscopy (PEEM), low-energy electron diffraction (LEED), and Auger electron spectroscopy (AES). Nickel coverages of 0.3, 0.6, and 1.0 monolayers were investigated. Coadsorbed with some oxygen, Ni starts to penetrate the Rh bulk region substantially only beyond 900 K. In the 10-5 mbar range, chemical waves are characterized by three distinct gray levels in PEEM. This number reduces to only two levels in the 10-6 mbar range. In situ LEED showed the periodic appearance of a (n × 1) (n = 8, 10) pattern during chemical waves which was assigned to a 2D-Ni oxide. With in situ AES, one observes that the bright phase in PEEM correlates with a high Ni coverage and the dark phase with a low Ni coverage.
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Affiliation(s)
- Tim Smolinsky
- Institut für Physikalische Chemie und Elektrochemie, Leibniz Universität Hannover, Callinstr. 3A, D-30167 Hannover, Germany
| | - Bernhard von Boehn
- Institut für Physikalische Chemie und Elektrochemie, Leibniz Universität Hannover, Callinstr. 3A, D-30167 Hannover, Germany
| | - Ronald Imbihl
- Institut für Physikalische Chemie und Elektrochemie, Leibniz Universität Hannover, Callinstr. 3A, D-30167 Hannover, Germany
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32
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Jung WS. High-performance bimetallic alloy catalyst using Ni and N co-doped composite carbon for the oxygen electro-reduction. J Colloid Interface Sci 2018; 514:30-39. [DOI: 10.1016/j.jcis.2017.12.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 11/26/2017] [Accepted: 12/05/2017] [Indexed: 10/18/2022]
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33
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Mancera LA, Engstfeld AK, Bensch A, Behm RJ, Groß A. Challenges in bimetallic multilayer structure formation: Pt growth on Cu monolayers on Ru(0001). Phys Chem Chem Phys 2018; 19:24100-24114. [PMID: 28835952 DOI: 10.1039/c7cp03320f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In a joint experimental and theoretical study, we investigated the formation and morphology of PtCu/Ru(0001) bimetallic surfaces grown at room and higher temperatures under UHV conditions. We obtained the PtCu/Ru(0001) surfaces by deposition of Pt atoms on a previously created Cu/Ru(0001) structure which includes only one Cu monolayer. Bimetallic surfaces prepared at different Pt coverages are investigated using STM imaging, revealing the existence of reconstruction lines and Cu islands. Although primarily created Cu islands continue growing in size by increasing Pt coverage, a continuous formation of new Cu islands is observed. This leads to an atypical exponential increase of the island density as well as to an atypical behavior of the average number of atoms per island for low Pt coverages. Although coalescence of the islands is observed for high Pt coverages, the island density remains almost constant in that regime. In order to understand the trends observed in the experiments, we study the stability of these surfaces, atom adsorption, and adatom diffusion using periodic density functional theory calculations. On the basis of the experimental observations and the first-principles calculations, we suggest a model that includes exchange of Pt adatoms with Cu surface atoms, Pt and Cu adatom diffusion, and attractive (repulsive) interactions between Cu (Pt) adatoms with substitutional Pt surface atoms, which explains the main trends in island formation and growth observed in the experiment.
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Affiliation(s)
- Luis A Mancera
- Institute of Theoretical Chemistry, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany.
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34
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Abstract
Platinum group metals (PGMs) serve as highly active catalysts in a variety of heterogeneous chemical processes. Unfortunately, their high activity is accompanied by a high affinity for CO and thus, PGMs are susceptible to poisoning. Alloying PGMs with metals exhibiting lower affinity to CO could be an effective strategy toward preventing such poisoning. In this work, we use density functional theory to demonstrate this strategy, focusing on highly dilute alloys of PGMs (Pd, Pt, Rh, Ir and Ni) with poison resistant coinage metal hosts (Cu, Ag, Au), such that individual PGM atoms are dispersed at the atomic limit forming single atom alloys (SAAs). We show that compared to the pure metals, CO exhibits lower binding strength on the majority of SAAs studied, and we use kinetic Monte Carlo simulation to obtain relevant temperature programed desorption spectra, which are found to be in good agreement with experiments. Additionally, we consider the effects of CO adsorption on the structure of SAAs. We calculate segregation energies which are indicative of the stability of dopant atoms in the bulk compared to the surface layer, as well as aggregation energies to determine the stability of isolated surface dopant atoms compared to dimer and trimer configurations. Our calculations reveal that CO adsorption induces dopant atom segregation into the surface layer for all SAAs considered here, whereas aggregation and island formation may be promoted or inhibited depending on alloy constitution and CO coverage. This observation suggests the possibility of controlling ensemble effects in novel catalyst architectures through CO-induced aggregation and kinetic trapping.
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35
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Meyer RJ, Zhang Q, Kryczka A, Gomez C, Todorovic R. Perturbation of Reactivity with Geometry: How Far Can We Go? ACS Catal 2017. [DOI: 10.1021/acscatal.7b03228] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Randall J. Meyer
- ExxonMobil Research and Engineering, Annandale, New Jersey 08801, United States
| | - Qiang Zhang
- Department
of Chemical Engineering, University of Illinois at Chicago, Chicago Illinois 60607, United States
| | - Anna Kryczka
- Illinois Math and Science Academy, Aurora, Illinois 60506, United States
| | - Carolina Gomez
- Department
of Chemical Engineering, University of Illinois at Chicago, Chicago Illinois 60607, United States
| | - Ruzica Todorovic
- Department
of Chemical Engineering, University of Illinois at Chicago, Chicago Illinois 60607, United States
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36
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Electrochemical Kinetics: a Surface Science-Supported Picture of Hydrogen Electrochemistry on Ru(0001) and Pt/Ru(0001). Electrocatalysis (N Y) 2017. [DOI: 10.1007/s12678-017-0381-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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37
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Andersen M, Medford AJ, Nørskov JK, Reuter K. Scaling-Relation-Based Analysis of Bifunctional Catalysis: The Case for Homogeneous Bimetallic Alloys. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00482] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mie Andersen
- Chair
for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, D-85747 Garching, Germany
| | - Andrew J. Medford
- SUNCAT
Center for Interface Science and Catalysis, Department of Chemical
Engineering, Stanford University, Stanford, California 94305, United States
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo
Park, California 94025, United States
| | - Jens K. Nørskov
- SUNCAT
Center for Interface Science and Catalysis, Department of Chemical
Engineering, Stanford University, Stanford, California 94305, United States
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo
Park, California 94025, United States
| | - Karsten Reuter
- Chair
for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, D-85747 Garching, Germany
- SUNCAT
Center for Interface Science and Catalysis, Department of Chemical
Engineering, Stanford University, Stanford, California 94305, United States
- SUNCAT
Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo
Park, California 94025, United States
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38
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Shan N, Zhou M, Hanchett MK, Chen J, Liu B. Practical principles of density functional theory for catalytic reaction simulations on metal surfaces – from theory to applications. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2017.1303687] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nannan Shan
- Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA
| | - Mingxia Zhou
- Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA
| | - Mary K. Hanchett
- Department of Chemical Engineering, University of Rochester, Rochester, NY 14627, USA
| | - Josephine Chen
- Department of Chemical Engineering, City College of New York, New York, NY 10031, USA
| | - Bin Liu
- Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA
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39
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Thota R, Sundari S, Berchmans S, Ganesh V. Silver - Copper Bimetallic Flexible Electrodes Prepared Using a Galvanic Replacement Reaction and Their Applications. ChemistrySelect 2017. [DOI: 10.1002/slct.201601810] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Raju Thota
- Electrodics and Electrocatalysis (EEC) Division; CSIR - Central Electrochemical Research Institute (CSIR - CECRI); Karaikudi - 630003 Tamilnadu India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi - 110025 India
| | - S. Sundari
- Electrodics and Electrocatalysis (EEC) Division; CSIR - Central Electrochemical Research Institute (CSIR - CECRI); Karaikudi - 630003 Tamilnadu India
| | - Sheela Berchmans
- Electrodics and Electrocatalysis (EEC) Division; CSIR - Central Electrochemical Research Institute (CSIR - CECRI); Karaikudi - 630003 Tamilnadu India
| | - V. Ganesh
- Electrodics and Electrocatalysis (EEC) Division; CSIR - Central Electrochemical Research Institute (CSIR - CECRI); Karaikudi - 630003 Tamilnadu India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi - 110025 India
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Sakong S, Fischer JM, Mahlberg D, Behm RJ, Groß A. Influence of Step and Island Edges on Local Adsorption Properties: Hydrogen Adsorption on Pt Monolayer Island Modified Ru(0001) Electrodes. Electrocatalysis (N Y) 2017. [DOI: 10.1007/s12678-017-0354-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zhang C, Lai Q, Holles JH. Bimetallic overlayer catalysts with high selectivity and reactivity for furfural hydrogenation. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2016.10.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Rezaei B, Havakeshian E, Ensafi AA. Electrocatalytic activity of bimetallic Pd Au nanostructure supported on nanoporous stainless steel surface using galvanic replacement reaction toward the glycerol oxidation in alkaline media. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.10.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fischer JM, Mahlberg D, Roman T, Groß A. Water adsorption on bimetallic PtRu/Pt(111) surface alloys. Proc Math Phys Eng Sci 2016; 472:20160618. [PMID: 27843411 PMCID: PMC5095452 DOI: 10.1098/rspa.2016.0618] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 09/22/2016] [Indexed: 11/12/2022] Open
Abstract
The adsorption of water on bimetallic PtRu/Pt(111) surface alloys has been studied based on periodic density functional theory calculations including dispersion corrections. The Ru atoms of the PtRu surface alloy interact more strongly with water than Pt atoms, as far as both single water molecules and ice-like hexagonal structures are concerned. Within the surface alloy layer, the lateral ligand effect reducing the local reactivity of the surface atoms with increasing Ru content is more dominant than the opposing geometric effect due to the tensile strain. The structural preference for the Ru atoms also prevails at room temperature, as ab initio molecular dynamics simulations show.
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Affiliation(s)
- Julia M. Fischer
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - David Mahlberg
- Institute of Theoretical Chemistry, Ulm University, 89069 Ulm, Germany
| | - Tanglaw Roman
- Institute of Theoretical Chemistry, Ulm University, 89069 Ulm, Germany
| | - Axel Groß
- Institute of Theoretical Chemistry, Ulm University, 89069 Ulm, Germany
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Cui XH, Duan XM. The stability and electronic properties of Pt-modified Cu(1 1 0) and Cu(1 1 1) in the absence/presence of small molecules: a density-functional theory modeling. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:085001. [PMID: 26828639 DOI: 10.1088/0953-8984/28/8/085001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Pt-Cu bimetallic alloys, as a key component in many heterogeneous catalysts, have the potential to be used in a range of industrially important reactions. The stability of platinum-modified Cu(1 1 0) and Cu(1 1 1) surfaces in the absence/presence of CO, NO and O has been investigated based on density-functional theory. We find that Pt alloyed in the second layer of the Cu (1 1 0) surface, rather than in the bulk, is the most favorable configuration. To relieve the strain, platinum tends to stay in the surface layer of close-packed Cu(1 1 1). Adsorbates can affect the stability of Pt-modified surfaces. Upon the adsorption of CO and NO, Pt segregation to the (1 1 0) surface becomes favorable, while on oxygen adsorption, no segregation occurs. Platinum only prefers to segregate on the Cu (1 1 1) surface when it is exposed to carbon monoxide, it tends to locate in the second layer for the other two adsorbates. Combining the position of d-band center, the d-bandwidth, and the separation between the bonding and antibonding states of the adsorbates, we interpret the results and correlate the relationship between the electronic properties of the substrate and the adsorption energy of the adsorbates, which could shed light on the prediction of bimetallic structures with desirable chemical properties.
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Affiliation(s)
- Xiao-Hong Cui
- Department of Physics, Faculty of Science, Ningbo University, Ningbo-315211, People's Republic of China
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Lucci FR, Darby MT, Mattera MFG, Ivimey CJ, Therrien AJ, Michaelides A, Stamatakis M, Sykes ECH. Controlling Hydrogen Activation, Spillover, and Desorption with Pd-Au Single-Atom Alloys. J Phys Chem Lett 2016; 7:480-5. [PMID: 26747698 DOI: 10.1021/acs.jpclett.5b02400] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Key descriptors in hydrogenation catalysis are the nature of the active sites for H2 activation and the adsorption strength of H atoms to the surface. Using atomically resolved model systems of dilute Pd-Au surface alloys and density functional theory calculations, we determine key aspects of H2 activation, diffusion, and desorption. Pd monomers in a Au(111) surface catalyze the dissociative adsorption of H2 at temperatures as low as 85 K, a process previously expected to require contiguous Pd sites. H atoms preside at the Pd sites and desorb at temperatures significantly lower than those from pure Pd (175 versus 310 K). This facile H2 activation and weak adsorption of H atom intermediates are key requirements for active and selective hydrogenations. We also demonstrate weak adsorption of CO, a common catalyst poison, which is sufficient to force H atoms to spill over from Pd to Au sites, as evidenced by low-temperature H2 desorption.
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Affiliation(s)
- Felicia R Lucci
- Department of Chemistry, Tufts University , 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| | - Matthew T Darby
- Thomas Young Centre and Department of Chemical Engineering, University College London , Roberts Building, Torrington Place, London WC1E 7JE, United Kingdom
| | - Michael F G Mattera
- Department of Chemistry, Tufts University , 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| | - Christopher J Ivimey
- Department of Chemistry, Tufts University , 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| | - Andrew J Therrien
- Department of Chemistry, Tufts University , 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| | - Angelos Michaelides
- Thomas Young Centre, London Centre for Nanotechnology and Department of Physics and Astronomy, University College London , 17-19 Gordon Street, London WC1H 0AH, United Kingdom
| | - Michail Stamatakis
- Thomas Young Centre and Department of Chemical Engineering, University College London , Roberts Building, Torrington Place, London WC1E 7JE, United Kingdom
| | - E Charles H Sykes
- Department of Chemistry, Tufts University , 62 Talbot Avenue, Medford, Massachusetts 02155, United States
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Benoit M, Tarrat N, Morillo J. Adsorption energy of small molecules on core–shell Fe@Au nanoparticles: tuning by shell thickness. Phys Chem Chem Phys 2016; 18:9112-23. [DOI: 10.1039/c5cp06258f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The adsorption of several small molecules on different gold surfaces, Au(001), strained Au(001) and Au(001) epitaxied on Fe(001), has been characterized using density functional theory.
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48
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Quaino PM, Nazmutdinov R, Peiretti LF, Santos E. Unravelling the hydrogen absorption process in Pd overlayers on a Au(111) surface. Phys Chem Chem Phys 2016; 18:3659-68. [DOI: 10.1039/c5cp06443k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Shedding light on the mechanism of hydrogen absorption occurring in nano-structured materials using the power of modern computational chemistry.
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Affiliation(s)
- Paola M. Quaino
- PRELINE
- Fac. de Ing. Química
- Universidad Nacional del Litoral
- 3000 Santa Fe
- Argentina
| | - Renat Nazmutdinov
- Kazan National Research Technological University
- 420015 Kazan
- Russian Federation
| | - Leonardo F. Peiretti
- PRELINE
- Fac. de Ing. Química
- Universidad Nacional del Litoral
- 3000 Santa Fe
- Argentina
| | - Elizabeth Santos
- Institute of Theoretical Chemistry
- Ulm University
- D-89069 Ulm
- Germany
- Facultad de Matemáticas
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Wang X, Perret N, Delannoy L, Louis C, Keane MA. Selective gas phase hydrogenation of nitroarenes over Mo2C-supported Au–Pd. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00514d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The first reported synthesis of Au–Pd/Mo2C from colloidal nanoparticles with enhanced selective catalytic hydrogenation of functionalised nitroarenes.
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Affiliation(s)
- Xiaodong Wang
- Chemical Engineering
- School of Engineering & Physical Sciences
- Heriot-Watt University
- Edinburgh EH14 4AS
- UK
| | - Noémie Perret
- Chemical Engineering
- School of Engineering & Physical Sciences
- Heriot-Watt University
- Edinburgh EH14 4AS
- UK
| | - Laurent Delannoy
- Laboratoire de Réactivité de Surface
- UMR 7197
- UPMC Univ Paris 06
- Sorbonne Universités
- Paris
| | - Catherine Louis
- Laboratoire de Réactivité de Surface
- UMR 7197
- UPMC Univ Paris 06
- Sorbonne Universités
- Paris
| | - Mark A. Keane
- Chemical Engineering
- School of Engineering & Physical Sciences
- Heriot-Watt University
- Edinburgh EH14 4AS
- UK
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Shutilov AA, Zenkovets GA, Oleinik AA, Pakharukov IY, Prosvirin IP. Effect of iron oxide additives on the physicochemical and catalytic properties of the supported Pt/TiO2 catalysts in the oxidation of carbon monoxide. KINETICS AND CATALYSIS 2015. [DOI: 10.1134/s0023158415050171] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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