1
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Ab Initio Investigation of the Adsorption and Dissociation of O2 on Cu-Skin Cu3Au(111) Surface. Catalysts 2022. [DOI: 10.3390/catal12111407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Surface adsorption and dissociation processes can have a decisive impact on the catalytic properties of metal alloys. We have used density functional theory to investigate the adsorption and dissociation of O2 on Cu-skin Cu3Au(111) surface. The calculated results show that the b-f(h)-b adsorption configuration is the most energetically favorable on the Cu-skin Cu3Au(111) surface. For O2 dissociation, there are two thermodynamically favorable dissociation paths. One path is from b-f-b to two O atoms in hcp sites, and the other path is from b-h-b to two O atoms in fcc sites. Moreover, the stability of O2 adsorption is higher and the dissociation energy barrier of the adsorbed O2 is lower as compared to those on the Cu(111) surface. This theoretical work provides valuable guidance for the practical application of Cu-Au alloys as highly efficient CO oxidation catalysts.
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2
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Farkaš B, Perry CB, Jones G, de Leeuw NH. Adsorbate-Induced Segregation of Cobalt from PtCo Nanoparticles: Modeling Au Doping and Core AuCo Alloying for the Improvement of Fuel Cell Cathode Catalysts. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2020; 124:18321-18334. [PMID: 32905400 PMCID: PMC7469135 DOI: 10.1021/acs.jpcc.0c04460] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/22/2020] [Indexed: 06/04/2023]
Abstract
Platinum, when used as a cathode material for the oxygen reduction reaction, suffers from high overpotential and possible dissolution, in addition to the scarcity of the metal and resulting cost. Although the introduction of cobalt has been reported to improve reaction kinetics and decrease the precious metal loading, surface segregation or complete leakage of Co atoms causes degradation of the membrane electrode assembly, and either of these scenarios of structural rearrangement eventually decreases catalytic power. Ternary PtCo alloys with noble metals could possibly maintain activity with a higher dissolution potential. First-principles-based theoretical methods are utilized to identify the critical factors affecting segregation in Pt-Co binary and Pt-Co-Au ternary nanoparticles in the presence of oxidizing species. With a decreasing share of Pt, surface segregation of Co atoms was already found to become thermodynamically viable in the PtCo systems at low oxygen concentrations, which is assigned to high charge transfer between species. While the introduction of gold as a dopant caused structural changes that favor segregation of Co, creation of CoAu alloy core is calculated to significantly suppress Co leakage through modification of the electronic properties. The theoretical framework of geometrically different ternary systems provides a new route for the rational design of oxygen reduction catalysts.
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Affiliation(s)
- Barbara Farkaš
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K.
| | - Christopher B. Perry
- Johnson
Matthey Research Centre, CSIR, Meiring Naude Road, Brummeria, Pretoria 0184, South Africa
| | - Glenn Jones
- Johnson
Matthey Technology Center, Blount’s Court, Sonning Common, Reading RG4 9NH, U.K.
| | - Nora H. de Leeuw
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K.
- School
of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
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3
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Yin S, Ding Y. Bimetallic PtAu electrocatalysts for the oxygen reduction reaction: challenges and opportunities. Dalton Trans 2020; 49:4189-4199. [PMID: 32191785 DOI: 10.1039/d0dt00205d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly active, durable oxygen reduction reaction (ORR) electrocatalysts have an essential role in promoting the continuous operation of advanced energy technologies such as fuel cells and metal-air batteries. Considering the scarce reserve of Pt and its unsatisfactory overall performance, there is an urgent demand for the development of new generation ORR electrocatalysts that are substantially better than the state-of-the-art supported Pt-based nanocatalysts, such as Pt/C. Among various nanostructures, bimetallic PtAu represents one unique alloy system where highly contradictory performance has been reported. While it is generally accepted that Au may contribute to stabilizing Pt, its role in modulating the intrinsic activity of Pt remains unclear. This perspective will discuss critical structural issues that affect the intrinsic ORR activities of bimetallic PtAu, with an eye on elucidating the origin of seemingly inconsistent experimental results from the literature. As a relatively new class of electrodes, we will also highlight the performance of dealloyed nanoporous gold (NPG) based electrocatalysts, which allow a unique combination of structural properties highly desired for this important reaction. Finally, we will put forward the challenges and opportunities for the incorporation of these advanced electrocatalysts into membrane electrode assemblies (MEA) for actual fuel cells.
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Affiliation(s)
- Shuai Yin
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Yi Ding
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China.
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4
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Dong Y, Chen Q, Cheng X, Li H, Chen J, Zhang X, Kuang Q, Xie Z. Optimization of gold-palladium core-shell nanowires towards H 2O 2 reduction by adjusting shell thickness. NANOSCALE ADVANCES 2020; 2:785-791. [PMID: 36133255 PMCID: PMC9417247 DOI: 10.1039/c9na00726a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 12/30/2019] [Indexed: 05/12/2023]
Abstract
Designable bimetallic core-shell nanoparticles exhibit superb performance in many fields including industrial catalysis, energy conversion and chemical sensing, due to their outstanding properties associated with their tunable electronic structure. Herein, Au-Pd core-shell (AurichPd@AuPdrich) nanowires (NWs) were synthesized through a one-pot facile chemical reduction method in the presence of cetyltrimethyl ammonium bromide (CTAB) surfactant. The thickness of the Pd shell could be adjusted by directly controlling the Au/Pd feeding ratio while maintaining the nanowire morphology. The as-obtained Au75Pd25 core-shell NWs with a thin Pdrich shell showed significantly enhanced activities towards the reduction of hydrogen peroxide with the sensitivity reaching 338 μA cm-2 mM-1 and a linear range up to 10 mM. In sum, Pd shell thickness could be used to adjust the electronic structure, thereby optimizing the catalytic activity.
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Affiliation(s)
- Yongdi Dong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 P. R. China
| | - Qiaoli Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 P. R. China
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology Hangzhou 310014 China
| | - Xiqing Cheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 P. R. China
| | - Huiqi Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 P. R. China
| | - Jiayu Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 P. R. China
| | - Xibo Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 P. R. China
| | - Qin Kuang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 P. R. China
| | - Zhaoxiong Xie
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 P. R. China
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5
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Gambu TG, Terranova U, Santos-Carballal D, Petersen MA, Jones G, van Steen E, de Leeuw NH. Thermal Properties and Segregation Behavior of Pt Nanowires Modified with Au, Ag, and Pd Atoms: A Classical Molecular Dynamics Study. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:20522-20531. [PMID: 32064014 PMCID: PMC7011775 DOI: 10.1021/acs.jpcc.9b02730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 07/21/2019] [Indexed: 06/10/2023]
Abstract
Platinum nanowires (NWs) have been reported to be catalytically active toward the oxygen reduction reaction (ORR). The edge modification of Pt NWs with metals M (M = Au, Ag, or Pd) may have a positive impact on the overall ORR activity by facilitating diffusion of adsorbed oxygen, Oads, and hydroxyl groups, OHads, between the {001} and {111} terraces. In the present study, we have employed classical molecular dynamics simulations to investigate the segregation behavior of Au, Ag, and Pd decorating the edges of Pt NWs. We observe that, under vacuum conditions, Pd prefers to diffuse toward the core rather than stay on the NW surface. Ag and Au atoms are mobile at temperatures as low as 900 K; they remain on the surface but do not appear to be preferentially more stable at edge sites. To effect segregation of Au and Ag atoms toward the edge, we propose annealing in the presence of different reactive gas environments. Overall, our study suggests potential experimental steps required for the synthesis of Pt nanowires and nanoparticles with improved Oads and OHads interfacet diffusion rates and consequently an improved ORR activity.
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Affiliation(s)
- Thobani G. Gambu
- Catalysis
Institute, Department of Chemical Engineering, University of Cape Town, Private Bag
X3, Rondebosch 7701, South Africa
| | - Umberto Terranova
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - David Santos-Carballal
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
- Materials
Modelling Centre, School of Physical and Mineral Sciences, University of Limpopo, Private Bag X1106, Sovenga 0727, South Africa
| | - Melissa A. Petersen
- Catalysis
Institute, Department of Chemical Engineering, University of Cape Town, Private Bag
X3, Rondebosch 7701, South Africa
| | - Glenn Jones
- Johnson
Matthey Technology Center, Blount’s
Court, Sonning Common, Reading RG4 9NH, United Kingdom
| | - Eric van Steen
- Catalysis
Institute, Department of Chemical Engineering, University of Cape Town, Private Bag
X3, Rondebosch 7701, South Africa
| | - Nora H. de Leeuw
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
- Department
of Earth Sciences, Utrecht University, Princetonplein 8A, Utrecht 3584 CD, Netherlands
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6
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Proch S, Yoshino S, Kitazumi K, Seki J, Kodama K, Morimoto Y. Over-Potential Deposited Hydrogen (Hopd) as Terminating Agent for Platinum and Gold Electro(co)Deposition. Electrocatalysis (N Y) 2019. [DOI: 10.1007/s12678-019-00551-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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8
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Holst-Olesen K, Reda M, Hansen HA, Vegge T, Arenz M. Enhanced Oxygen Reduction Activity by Selective Anion Adsorption on Non-Precious-Metal Catalysts. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01584] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kaspar Holst-Olesen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Ø Copenhagen, Denmark
| | - Mateusz Reda
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs Lyngby, Denmark
| | - Heine A. Hansen
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs Lyngby, Denmark
| | - Tejs Vegge
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs Lyngby, Denmark
| | - Matthias Arenz
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
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9
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Zhao Y, Zhang W, Yin H, He J, Ding Y. Surface alloying of Pt monolayer on nanoporous gold for enhanced oxygen reduction. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.04.067] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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El-Zoka AA, Langelier B, Korinek A, Botton GA, Newman RC. Nanoscale mechanism of the stabilization of nanoporous gold by alloyed platinum. NANOSCALE 2018; 10:4904-4912. [PMID: 29480291 DOI: 10.1039/c7nr08206a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanoporous gold (NPG) is usually made by electrochemical dealloying of Ag from binary AgAu alloys. The resulting nanoscale ligaments are not very stable, and tend to coarsen with time by surface self-diffusion, especially in electrolyte, which may lead to inferior electrocatalytic properties. Addition of a small amount of Pt to the precursor alloy is known to refine and stabilize the nanoporous product (NPG-Pt). However, the mechanisms by which Pt serves to refine the microstructure remain poorly understood. The present study aims to expand our knowledge of the role of Pt by examining NPG-Pt at atomic resolution with Atom Probe Tomography (APT), as well as by aberration-corrected Transmission Electron Microscopy. Atomic level observation of Pt enrichment on ligament surfaces sheds light on the underlying mechanisms that give rise to Pt's refining effect. Owing to improved Ag retention with higher Pt content, NPG-Pt1 (made by dealloying Ag77Au22Pt1) was shown to have the highest surface area-to-volume ratio, compared to NPG-Pt3 (made by dealloying Ag77Au20Pt3). Quantitative estimates reveal up to 5-fold enrichment of Pt at nanoligament surfaces, compared to the precursor content, in NPG-Pt. The interface between the dealloyed layer and the substrate was captured by APT, for the first time. The findings of this investigation add insight into the functionality of NPG-Pt and its prospective catalytic performance.
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Affiliation(s)
- A A El-Zoka
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada.
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11
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Tripkovic V, Hansen HA, Vegge T. Computational Screening of Doped α-MnO 2 Catalysts for the Oxygen Evolution Reaction. CHEMSUSCHEM 2018; 11:629-637. [PMID: 29194999 DOI: 10.1002/cssc.201701659] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Indexed: 06/07/2023]
Abstract
Minimizing energy and materials costs for driving the oxygen evolution reaction (OER) is paramount for the commercialization of water electrolysis cells and rechargeable metal-air batteries. Structural stability, catalytic activity, and electronic conductivity of pure and doped α-MnO2 for the OER are studied using density functional theory calculations. As model surfaces, we investigate the (110) and (100) facets, on which three possible active sites are identified: a coordination unsaturated, a bridge, and a bulk site. For pure and Cr-, Fe-, Co-, Ni-, Cu-, Zn-, Cd-, Mg-, Al-, Ga-, In-, Sc-, Ru-, Rh-, Ir-, Pd-, Pt-, Ti-, Zr-, Nb-, and Sn-doped α-MnO2 , the preferred valence at each site is imposed by adding/subtracting electron donors (hydrogen atoms) and electron acceptors (hydroxy groups). From a subset of stable dopants, Pd-doped α-MnO2 is identified as the best catalyst and the only material that can outperform pristine α-MnO2 . Different approaches to increase the bulk electron conductivity of semiconducting α-MnO2 are discussed.
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Affiliation(s)
- Vladimir Tripkovic
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark
| | - Heine Anton Hansen
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark
| | - Tejs Vegge
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark
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12
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13
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Katsounaros I, Figueiredo MC, Chen X, Calle-Vallejo F, Koper MTM. Structure- and Coverage-Sensitive Mechanism of NO Reduction on Platinum Electrodes. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01069] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ioannis Katsounaros
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2300
RA Leiden, The Netherlands
| | - Marta C. Figueiredo
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2300
RA Leiden, The Netherlands
| | - Xiaoting Chen
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2300
RA Leiden, The Netherlands
| | - Federico Calle-Vallejo
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2300
RA Leiden, The Netherlands
| | - Marc T. M. Koper
- Leiden University, Leiden Institute of Chemistry, Einsteinweg 55, 2300
RA Leiden, The Netherlands
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14
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Hu S, Cheng K, Ribeiro EL, Park K, Khomami B, Mukherjee D. A facile and surfactant-free route for nanomanufacturing of tailored ternary nanoalloys as superior oxygen reduction reaction electrocatalysts. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00073a] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Laser ablation synthesis in solution-galvanic replacement reaction (LASiS-GRR) enables tuning of elemental ratios and bonding properties for Pt based ternary nanoalloys as ORR electrocatalysts.
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Affiliation(s)
- Sheng Hu
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
- Nano-BioMaterials Laboratory for Energy, Energetics & Environment (nbml-E3)
| | - Kangming Cheng
- Department of Mechanical, Aerospace & Biomedical Engineering
- University of Tennessee
- Knoxville
- USA
- Nano-BioMaterials Laboratory for Energy, Energetics & Environment (nbml-E3)
| | - Erick L. Ribeiro
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
- Nano-BioMaterials Laboratory for Energy, Energetics & Environment (nbml-E3)
| | - Kiman Park
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
- Nano-BioMaterials Laboratory for Energy, Energetics & Environment (nbml-E3)
| | - Bamin Khomami
- Department of Mechanical, Aerospace & Biomedical Engineering
- University of Tennessee
- Knoxville
- USA
- Department of Chemical & Biomolecular Engineering
| | - Dibyendu Mukherjee
- Department of Mechanical, Aerospace & Biomedical Engineering
- University of Tennessee
- Knoxville
- USA
- Department of Chemical & Biomolecular Engineering
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15
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Proch S, Kodama K, Yoshino S, Takahashi N, Kato N, Morimoto Y. CO-Terminated Platinum Electrodeposition on Nb-Doped Bulk Rutile TiO2. Electrocatalysis (N Y) 2016. [DOI: 10.1007/s12678-016-0316-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Venarusso LB, Bettini J, Maia G. Catalysts for oxygen reduction reaction based on nanocrystals of a Pt or Pt–Pd alloy shell supported on a Au core. J Solid State Electrochem 2016. [DOI: 10.1007/s10008-016-3181-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Gatalo M, Jovanovič P, Polymeros G, Grote JP, Pavlišič A, Ruiz- Zepeda F, Šelih VS, Šala M, Hočevar S, Bele M, Mayrhofer KJ, Hodnik N, Gaberšček M. Positive Effect of Surface Doping with Au on the Stability of Pt-Based Electrocatalysts. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02883] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matija Gatalo
- Faculty
of Chemistry and Chemical Technology, University of Ljubljana, Večna
pot 113, SI-1000 Ljubljana, Slovenia
- Laboratory
for Materials Chemistry, National Institute of Chemistry, Hajdrihova
19, SI-1000 Ljubljana, Slovenia
| | - Primož Jovanovič
- Faculty
of Chemistry and Chemical Technology, University of Ljubljana, Večna
pot 113, SI-1000 Ljubljana, Slovenia
- Laboratory
for Materials Chemistry, National Institute of Chemistry, Hajdrihova
19, SI-1000 Ljubljana, Slovenia
| | - George Polymeros
- Department
of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, 40237 Düsseldorf, Germany
| | - Jan-Philipp Grote
- Department
of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, 40237 Düsseldorf, Germany
| | - Andraž Pavlišič
- Laboratory
for Materials Chemistry, National Institute of Chemistry, Hajdrihova
19, SI-1000 Ljubljana, Slovenia
| | - Francisco Ruiz- Zepeda
- Laboratory
for Materials Chemistry, National Institute of Chemistry, Hajdrihova
19, SI-1000 Ljubljana, Slovenia
| | - Vid Simon Šelih
- Analytical
Chemistry Laboratory, National Institute of Chemistry, Hajdrihova
19, SI-1000 Ljubljana, Slovenia
| | - Martin Šala
- Analytical
Chemistry Laboratory, National Institute of Chemistry, Hajdrihova
19, SI-1000 Ljubljana, Slovenia
| | - Samo Hočevar
- Analytical
Chemistry Laboratory, National Institute of Chemistry, Hajdrihova
19, SI-1000 Ljubljana, Slovenia
| | - Marjan Bele
- Laboratory
for Materials Chemistry, National Institute of Chemistry, Hajdrihova
19, SI-1000 Ljubljana, Slovenia
| | - Karl J.J. Mayrhofer
- Department
of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, 40237 Düsseldorf, Germany
- Forschungszentrum
Jülich, “Helmholtz-Institut Erlangen-Nürnberg”
(IEK11), Nägelsbachstrasse 49b, 91052 Erlangen, Germany
| | - Nejc Hodnik
- Laboratory
for Materials Chemistry, National Institute of Chemistry, Hajdrihova
19, SI-1000 Ljubljana, Slovenia
- Department
of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, 40237 Düsseldorf, Germany
| | - Miran Gaberšček
- Faculty
of Chemistry and Chemical Technology, University of Ljubljana, Večna
pot 113, SI-1000 Ljubljana, Slovenia
- Laboratory
for Materials Chemistry, National Institute of Chemistry, Hajdrihova
19, SI-1000 Ljubljana, Slovenia
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18
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Jennings PC, Lysgaard S, Hansen HA, Vegge T. Decoupling strain and ligand effects in ternary nanoparticles for improved ORR electrocatalysis. Phys Chem Chem Phys 2016; 18:24737-45. [DOI: 10.1039/c6cp04194a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Ternary Pt–Au–M (M = 3d transition metal) nanoparticles show reduced OH adsorption energies and improved activity for the oxygen reduction reaction (ORR) compared to pure Pt nanoparticles, as obtained by density functional theory.
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Affiliation(s)
- Paul C. Jennings
- Department of Energy Conversion and Storage
- Technical University of Denmark
- Lyngby
- Denmark
| | - Steen Lysgaard
- Department of Energy Conversion and Storage
- Technical University of Denmark
- Lyngby
- Denmark
| | - Heine A. Hansen
- Department of Energy Conversion and Storage
- Technical University of Denmark
- Lyngby
- Denmark
| | - Tejs Vegge
- Department of Energy Conversion and Storage
- Technical University of Denmark
- Lyngby
- Denmark
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19
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Deng YJ, Tripkovic V, Rossmeisl J, Arenz M. Oxygen Reduction Reaction on Pt Overlayers Deposited onto a Gold Film: Ligand, Strain, and Ensemble Effect. ACS Catal 2015. [DOI: 10.1021/acscatal.5b02409] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yu-Jia Deng
- Nano-Science
Center, Department of Chemistry, University of Copenhagen, Universitetsparken
5, DK-2100 Copenhagen
Ø, Denmark
| | - Vladimir Tripkovic
- Nano-Science
Center, Department of Chemistry, University of Copenhagen, Universitetsparken
5, DK-2100 Copenhagen
Ø, Denmark
- Department
of Energy Conversion and Storage, Technical University of Denmark, DK-4000 Roskilde, Denmark
| | - Jan Rossmeisl
- Nano-Science
Center, Department of Chemistry, University of Copenhagen, Universitetsparken
5, DK-2100 Copenhagen
Ø, Denmark
| | - Matthias Arenz
- Nano-Science
Center, Department of Chemistry, University of Copenhagen, Universitetsparken
5, DK-2100 Copenhagen
Ø, Denmark
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20
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Fu Q, Colmenares Rausseo LC, Martinez U, Dahl PI, García Lastra JM, Vullum PE, Svenum IH, Vegge T. Effect of Sb Segregation on Conductance and Catalytic Activity at Pt/Sb-Doped SnO2 Interface: A Synergetic Computational and Experimental Study. ACS APPLIED MATERIALS & INTERFACES 2015; 7:27782-27795. [PMID: 26615834 DOI: 10.1021/acsami.5b08966] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Antimony-doped tin dioxide (ATO) is considered a promising support material for Pt-based fuel cell cathodes, displaying enhanced stability over carbon-based supports. In this work, the effect of Sb segregation on the conductance and catalytic activity at Pt/ATO interface was investigated through a combined computational and experimental study. It was found that Sb-dopant atoms prefer to segregate toward the ATO/Pt interface. The deposited Pt catalysts, interestingly, not only promote Sb segregation, but also suppress the occurrence of Sb(3+) species, a charge carrier neutralizer at the interface. The conductivity of ATO was found to increase, to a magnitude close to that of activated carbon, with an increment of Sb concentration before reaching a saturation point around 10%, and then decrease, indicating that Sb enrichment at the ATO surface may not always favor an increment of the electric current. In addition, the calculation results show that the presence of Sb dopants in ATO has little effect on the catalytic activity of deposited three-layer Pt toward the oxygen reduction reaction, although subsequent alloying of Pt and Sb could lower the corresponding catalytic activity. These findings help to support future applications of ATO/Pt-based materials as possible cathodes for proton exchange membrane fuel cell applications with enhanced durability under practical applications.
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Affiliation(s)
- Qiang Fu
- Department of Energy Conversion and Storage, Technical University of Denmark , Fysikvej, 2800 Kongens Lyngby, Denmark
| | | | - Umberto Martinez
- QuantumWise A/S, Fruebjergvej 3, Postbox 4, 2100 Copenhagen, Denmark
| | - Paul Inge Dahl
- SINTEF Materials and Chemistry, NO0-7465 Trondheim, Norway
| | - Juan Maria García Lastra
- Department of Energy Conversion and Storage, Technical University of Denmark , Fysikvej, 2800 Kongens Lyngby, Denmark
| | | | | | - Tejs Vegge
- Department of Energy Conversion and Storage, Technical University of Denmark , Fysikvej, 2800 Kongens Lyngby, Denmark
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Lankiang S, Chiwata M, Baranton S, Uchida H, Coutanceau C. Oxygen reduction reaction at binary and ternary nanocatalysts based on Pt, Pd and Au. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.061] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Tripkovic V, Zheng J, Rizzi GA, Marega C, Durante C, Rossmeisl J, Granozzi G. Comparison between the Oxygen Reduction Reaction Activity of Pd5Ce and Pt5Ce: The Importance of Crystal Structure. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01254] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vladimir Tripkovic
- Center
for Atomic-scale Materials Design, Department of Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Jian Zheng
- Department
of Chemical Sciences, University of Padova, Via Marzolo, 1-35131 Padova, Italy
| | - Gian Andrea Rizzi
- Department
of Chemical Sciences, University of Padova, Via Marzolo, 1-35131 Padova, Italy
| | - Carla Marega
- Department
of Chemical Sciences, University of Padova, Via Marzolo, 1-35131 Padova, Italy
| | - Christian Durante
- Department
of Chemical Sciences, University of Padova, Via Marzolo, 1-35131 Padova, Italy
| | - Jan Rossmeisl
- Center
for Atomic-scale Materials Design, Department of Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
- Nano-Science
Center, Department of Chemistry, University of Copenhagen, Universitetsparken
5, DK-2100 Copenhagen, Denmark
| | - Gaetano Granozzi
- Department
of Chemical Sciences, University of Padova, Via Marzolo, 1-35131 Padova, Italy
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