1
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Mkhohlakali AC, Fuku X, Modibedi RM, Khotseng LE, Mathe MK. Electroformation of Pd‐modified Thin Film Electrocatalysts Using E‐ALD Technique. ELECTROANAL 2021. [DOI: 10.1002/elan.202100040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- A. C. Mkhohlakali
- Smart Places Energy Centre Council for Scientific and Industrial Research (CSIR) Pretoria 0012 South Africa
- Department of Chemistry University of the Western Cape, Bellville Cape Town South Africa
| | - X. Fuku
- Smart Places Energy Centre Council for Scientific and Industrial Research (CSIR) Pretoria 0012 South Africa
| | - R. M. Modibedi
- Smart Places Energy Centre Council for Scientific and Industrial Research (CSIR) Pretoria 0012 South Africa
| | - L. E. Khotseng
- Department of Chemistry University of the Western Cape, Bellville Cape Town South Africa
| | - M. K. Mathe
- Smart Places Energy Centre Council for Scientific and Industrial Research (CSIR) Pretoria 0012 South Africa
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2
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Ahmadi K, Dole N, Wu D, Salavati-Fard T, Grabow LC, Robles Hernandez FC, Brankovic SR. Electroless Pb Monolayer Deposition—Prelude for Further Advances in Catalyst Monolayer Synthesis via Surface Limited Redox Replacement Reaction. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kamyar Ahmadi
- Material Science and Engineering Program, University of Houston, Houston Texas 77204, United States
| | - Nikhil Dole
- Electrical and Computer Engineering Department, University of Houston, Houston Texas 77204, United States
| | - Dongjun Wu
- Electrical and Computer Engineering Department, University of Houston, Houston Texas 77204, United States
| | - Taha Salavati-Fard
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
- Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, Texas 77204, United States
| | - Lars C. Grabow
- Material Science and Engineering Program, University of Houston, Houston Texas 77204, United States
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
- Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, Texas 77204, United States
| | - Francisco Carlos Robles Hernandez
- Material Science and Engineering Program, University of Houston, Houston Texas 77204, United States
- Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, Texas 77204, United States
- Collge of Technology, University of Houston, Houston Texas 77204, United States
| | - Stanko R. Brankovic
- Electrical and Computer Engineering Department, University of Houston, Houston Texas 77204, United States
- Material Science and Engineering Program, University of Houston, Houston Texas 77204, United States
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
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3
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Alinezhad A, Benedetti TM, Lian J, Gonçales VR, Gooding JJ, Tilley RD. Controlling hydrogen evolution reaction activity on Ni core-Pt island nanoparticles by tuning the size of the Pt islands. Chem Commun (Camb) 2021; 57:2788-2791. [PMID: 33599222 DOI: 10.1039/d0cc07769k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Pt islands with different sizes were grown on amorphous Ni nanoparticles, allowing the tuning of the Pt-Ni interface without changing the hydrogen binding energy of the Pt sites. As a result, the HER activity of the electrocatalysts increases by decreasing the size of the Pt islands due to the greater surface area of the Pt-Ni interfaces.
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Affiliation(s)
- Ali Alinezhad
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.
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4
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Adstructures of platinum-complex precursors and platinum nanoparticles formed on low-index single-crystal Au surfaces for oxygen reduction reaction. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Lapp AS, Crooks RM. Multilayer electrodeposition of Pt onto 1-2 nm Au nanoparticles using a hydride-termination approach. NANOSCALE 2020; 12:11026-11039. [PMID: 32420580 DOI: 10.1039/d0nr02929g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Here we report on hydride-terminated (HT) electrodeposition of Pt multilayers onto ∼1.6 nm Au nanoparticles (NPs). The results build on our earlier findings regarding electrodeposition of a single monolayer of Pt onto Au NPs and reports relating to HT Pt electrodeposition onto bulk Au. In the latter case, it was found that electrodeposition of Pt from a solution containing PtCl42- can be limited to a single monolayer of Pt atoms if it is immediately followed by adsorption of a monolayer of H atoms. The H-atom capping layer prevents deposition of Pt multilayers. In the present report we are interested in comparing the structure of NPs after multiple HT Pt electrodeposition cycles to the bulk analog. The results indicate that a greater number of HT Pt cycles are required to electrodeposit both a single Pt monolayer and Pt multilayers onto these Au NPs compared to bulk Au. Additionally, detailed structural analysis shows that there are fundamental differences in the structures of the AuPt materials depending on whether they are prepared on Au NPs or bulk Au. The resulting structures have a profound impact on formic acid oxidation electrocatalysis.
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Affiliation(s)
- Aliya S Lapp
- Department of Chemistry and Texas Materials Institute, The University of Texas at Austin, 2506 Speedway, Stop A5300, Austin, TX 78712-1224, USA.
| | - Richard M Crooks
- Department of Chemistry and Texas Materials Institute, The University of Texas at Austin, 2506 Speedway, Stop A5300, Austin, TX 78712-1224, USA.
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6
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Zhang C, Chao L, Wang L, Cheng Y, Xie Q. Preparation of a Pt thin-film modified electrode for alkaline electrocatalytic oxidation of methanol by Cu(OH)2 electrodeposition and galvanic replacement reaction. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2019.135234] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Abstract
Abstract
The current study outlines the electrochemical recovery of tellurium from a metallurgical plant waste fraction, namely Doré slag. In the precious metals plant, tellurium is enriched to the TROF (Tilting, Rotating Oxy Fuel) furnace slag and is therefore considered to be a lost resource—although the slag itself still contains a recoverable amount of tellurium. To recover Te, the slag is first leached in aqua regia, to produce multimetal pregnant leach solution (PLS) with 421 ppm of Te and dominating dissolved elements Na, Ba, Bi, Cu, As, B, Fe and Pb (in the range of 1.4–6.4 g dm−3), as well as trace elements at the ppb to ppm scale. The exposure of slag to chloride-rich solution enables the formation of cuprous chloride complex and consequently, a decrease in the reduction potential of elemental copper. This allows improved selectivity in electrochemical recovery of Te. The results suggest that electrowinning (EW) is a preferred Te recovery method at concentrations above 300 ppm, whereas at lower concentrations EDRR is favoured. The purity of recovered tellurium is investigated with SEM–EDS (scanning electron microscope–energy dispersion spectroscopy). Based on the study, a new, combined two-stage electrochemical recovery process of tellurium from Doré slag PLS is proposed: EW followed by EDRR.
Graphic abstract
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8
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Alinezhad A, Gloag L, Benedetti TM, Cheong S, Webster RF, Roelsgaard M, Iversen BB, Schuhmann W, Gooding JJ, Tilley RD. Direct Growth of Highly Strained Pt Islands on Branched Ni Nanoparticles for Improved Hydrogen Evolution Reaction Activity. J Am Chem Soc 2019; 141:16202-16207. [PMID: 31580659 DOI: 10.1021/jacs.9b07659] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The direct growth of Pt islands on lattice mismatched Ni nanoparticles is a major synthetic challenge and a promising strategy to create highly strained Pt atoms for electrocatalysis. By using very mild reaction conditions, Pt islands with tunable strain were formed directly on Ni branched particles. The highly strained 1.9 nm Pt-island on branched Ni nanoparticles exhibited high specific activity and the highest mass activity for hydrogen evolution (HER) in a pH 13 electrolyte. These results show the ability to synthetically tune the size of the Pt islands to control the strain to give higher HER activity.
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Affiliation(s)
- Ali Alinezhad
- School of Chemistry , The University of New South Wales , Sydney , New South Wales 2052 , Australia
| | - Lucy Gloag
- School of Chemistry , The University of New South Wales , Sydney , New South Wales 2052 , Australia
| | - Tania M Benedetti
- School of Chemistry , The University of New South Wales , Sydney , New South Wales 2052 , Australia
| | - Soshan Cheong
- Mark Wainwright Analytical Centre , The University of New South Wales , Sydney , New South Wales 2052 , Australia
| | - Richard F Webster
- Mark Wainwright Analytical Centre , The University of New South Wales , Sydney , New South Wales 2052 , Australia
| | - Martin Roelsgaard
- Center for Materials Crystallography, Department of Chemistry and iNANO , Aarhus University , Langelandsgade 140 , DK-8000 Aarhus C , Denmark.,PETRA III, Deutsches-Elektronen Synchrotron (DESY) , Notkestr. 85 , D-22607 Hamburg , Germany
| | - Bo B Iversen
- Center for Materials Crystallography, Department of Chemistry and iNANO , Aarhus University , Langelandsgade 140 , DK-8000 Aarhus C , Denmark
| | - Wolfgang Schuhmann
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry , Ruhr University Bochum , Universitätsstr. 150 , D-44780 Bochum , Germany
| | - J Justin Gooding
- School of Chemistry , The University of New South Wales , Sydney , New South Wales 2052 , Australia.,Australian Centre for NanoMedicine , The University of New South Wales , Sydney , New South Wales 2052 , Australia
| | - Richard D Tilley
- School of Chemistry , The University of New South Wales , Sydney , New South Wales 2052 , Australia.,Mark Wainwright Analytical Centre , The University of New South Wales , Sydney , New South Wales 2052 , Australia.,Australian Centre for NanoMedicine , The University of New South Wales , Sydney , New South Wales 2052 , Australia
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9
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Lee J, Yoo JK, Lee H, Kim SH, Sohn Y, Rhee CK. Formic acid oxidation on Pt deposit model catalysts on Au: Single-layered Pt deposits, plateau-type Pt deposits, and conical Pt deposits. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.04.107] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Halli P, Heikkinen JJ, Elomaa H, Wilson BP, Jokinen V, Yliniemi K, Franssila S, Lundström M. Platinum Recovery from Industrial Process Solutions by Electrodeposition-Redox Replacement. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2018; 6:14631-14640. [PMID: 30416892 PMCID: PMC6224123 DOI: 10.1021/acssuschemeng.8b03224] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 09/14/2018] [Indexed: 05/29/2023]
Abstract
In the current study, platinum-present as a negligible component (below 1 ppb, the detection limit of the HR-ICP-MS at the dilutions used) in real industrial hydrometallurgical process solutions-was recovered by an electrodeposition-redox replacement (EDRR) method on pyrolyzed carbon (PyC) electrode, a method not earlier applied to metal recovery. The recovery parameters of the EDRR process were initially investigated using a synthetic nickel electrolyte solution ([Ni] = 60 g/L, [Ag] = 10 ppm, [Pt] = 20 ppm, [H2SO4] = 10 g/L), and the results demonstrated an extraordinary increase of 3 × 105 in the [Pt]/[Ni] on the electrode surface cf. synthetic solution. EDRR recovery of platinum on PyC was also tested with two real industrial process solutions that contained a complex multimetal solution matrix: Ni as the major component (>140 g/L) and very low contents of Pt, Pd, and Ag (i.e., <1 ppb, 117 and 4 ppb, respectively). The selectivity of Pt recovery by EDRR on the PyC electrode was found to be significant-nanoparticles deposited on the electrode surface comprised on average of 90 wt % platinum and a [Pt]/[Ni] enrichment ratio of 1011 compared to the industrial hydrometallurgical solution. Furthermore, other precious metallic elements like Pd and Ag could also be enriched on the PyC electrode surface using the same methodology. This paper demonstrates a remarkable advancement in the recovery of trace amounts of platinum from real industrial solutions that are not currently considered as a source of Pt metal.
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Affiliation(s)
- Petteri Halli
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, Otakaari 3 J, P.O. Box 12200, FI-00076 Aalto, Finland
| | - Joonas J. Heikkinen
- Microfabrication,
Department of Chemistry and Materials Science (CMAT), School of Chemical
Engineering, Aalto University, Micronova, Tietotie 3, P.O. Box 13500, Fi-00076 Aalto, Finland
| | - Heini Elomaa
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, Otakaari 3 J, P.O. Box 12200, FI-00076 Aalto, Finland
| | - Benjamin P. Wilson
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, Otakaari 3 J, P.O. Box 12200, FI-00076 Aalto, Finland
| | - Ville Jokinen
- Microfabrication,
Department of Chemistry and Materials Science (CMAT), School of Chemical
Engineering, Aalto University, Micronova, Tietotie 3, P.O. Box 13500, Fi-00076 Aalto, Finland
| | - Kirsi Yliniemi
- Department
of Chemistry and Materials Science (CMAT), Aalto University, School of Chemical Engineering, Kemistintie 1, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Sami Franssila
- Microfabrication,
Department of Chemistry and Materials Science (CMAT), School of Chemical
Engineering, Aalto University, Micronova, Tietotie 3, P.O. Box 13500, Fi-00076 Aalto, Finland
| | - Mari Lundström
- Hydrometallurgy
and Corrosion, Department of Chemical and Metallurgical Engineering
(CMET), School of Chemical Engineering, Aalto University, Otakaari 3 J, P.O. Box 12200, FI-00076 Aalto, Finland
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11
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Lee J, Yoo JK, Kim J, Sohn Y, Rhee CK. Conical multiple-layered Pt deposits on Au and its adsorption stoichiometries of CO and hydrogen. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.09.078] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Ultra-Thin Platinum Deposits by Surface-Limited Redox Replacement of Tellurium. NANOMATERIALS 2018; 8:nano8100836. [PMID: 30326574 PMCID: PMC6215156 DOI: 10.3390/nano8100836] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 10/07/2018] [Accepted: 10/12/2018] [Indexed: 11/17/2022]
Abstract
Platinum is the most employed electrocatalyst for the reactions taking place in energy converters, such as the oxygen reduction reaction in proton exchange membrane fuel cells, despite being a very low abundant element in the earth’s crust and thus extremely expensive. The search for more active electrocatalysts with ultra-low Pt loading is thus a very active field of investigation. Here, surface-limited redox replacement (SLRR) that utilizes the monolayer-limited nature of underpotential deposition (UPD) was used to prepare ultrathin deposits of Pt, using Te as sacrificial metal. Cyclic voltammetry and anodic potentiodynamic scanning experiments have been performed to determine the optimal deposition conditions. Physicochemical and electrochemical characterization of the deposited Pt was carried out. The deposit comprises a series of contiguous Pt islands that form along the grain interfaces of the Au substrate. The electrochemical surface area (ECSA) of the Pt deposit obtained after 5 replacements, estimated to be 18 m2/g, is in agreement with the ECSA of extended surface catalysts on flat surfaces.
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13
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Wu D, Solanki DJ, Ramirez JL, Yang W, Joi A, Dordi Y, Dole N, Brankovic SR. Electroless Deposition of Pb Monolayer: A New Process and Application to Surface Selective Atomic Layer Deposition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11384-11394. [PMID: 30179483 DOI: 10.1021/acs.langmuir.8b02272] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The present work demonstrates an electroless (e-less) deposition of Pb monolayer on Au and Cu surface whose morphology and properties resemble its underpotentially deposited counterpart. Our results and analysis show that the e-less Pb monolayer deposition is a surface selective, surface controlled, self-terminating process. Results also show that the electroless Pb monolayer deposition is enabling a phenomenon for new deposition method called "electroless atomic layer deposition" (e-less ALD). Here, the e-less Pb monolayer serves as reducing agent and sacrificial material in surface limited redox replacement reaction with noble metal ions such as Pt n+, i.e., Pt deposition. The e-less ALD is highly selective to the metal substrates at which Pb forms the e-less monolayer. The full e-less ALD cycle leads to an overall deposition of a controlled amount of the noble metal. Repetition of the two-step e-less ALD cycle an arbitrary number of times leads to formation of a highly compact, smooth, and conformal noble metal thin film with applications spanning from catalyst synthesis to semiconductor technology. The process is designed for (but not limited to) aqueous solutions that can be easily scaled up to any size and shape of the substrate, deeming its wide applications.
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Affiliation(s)
- Dongjun Wu
- Cullen College of Engineering , University of Houston , Houston , Texas 77204 , United States
| | - Dhaivat J Solanki
- Cullen College of Engineering , University of Houston , Houston , Texas 77204 , United States
| | - J Luis Ramirez
- Cullen College of Engineering , University of Houston , Houston , Texas 77204 , United States
| | - Wenli Yang
- Cullen College of Engineering , University of Houston , Houston , Texas 77204 , United States
| | - Aniruddha Joi
- Lam Research Corporation , Fremont , California 94538 , United States
| | - Yezdi Dordi
- Lam Research Corporation , Fremont , California 94538 , United States
| | - Nikhil Dole
- Lam Research Corporation , Fremont , California 94538 , United States
| | - Stanko R Brankovic
- Cullen College of Engineering , University of Houston , Houston , Texas 77204 , United States
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14
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Nutariya J, Kuroiwa E, Takimoto D, Shen Z, Mochizuki D, Sugimoto W. Model electrode study of Ru@Pt core-shell nanosheet catalysts: Pure two-dimensional growth via surface limited redox replacement. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.07.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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16
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Huang JF, Tseng PK. High performance layer-by-layer Pt 3Ni(Pt-skin)-modified Pd/C for the oxygen reduction reaction. Chem Sci 2018; 9:6134-6142. [PMID: 30090301 PMCID: PMC6053971 DOI: 10.1039/c8sc01358f] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 06/26/2018] [Indexed: 11/21/2022] Open
Abstract
A core (Pd)/shell (Pt3Ni(Pt-skin)) ORR catalyst was obtained, and displayed eminently superior catalytic performance to state-of-the-art Pt–Ni catalysts.
Bimetallic Pt–Ni with Pt on the outermost layer and an innermost layer enriched in Ni, referred to as Pt3Ni(Pt-skin), is a promising configuration of an electrocatalyst for the oxygen reduction reaction (ORR) in fuel cells. We prepare a core (Pd)/shell (Pt3Ni(Pt-skin)) catalyst (Pt3Ni(Pt-skin)/Pd/C) from Zn underpotential deposition (UPD) on a Ni UPD modified Pd/C catalyst, facilitating Pt atomic layer-by-layer growth on the Ni surface through the galvanic replacement process. Pt3Ni(Pt-skin)/Pd/C shows the best ORR performance, with a Pt specific activity of 16.7 mA cm–2 and Pt mass activity of 14.2 A mgPt–1, which are 90- and 156- fold improvements over commercial Pt/C catalysts. The Pt3Ni(Pt-skin) structure effectively inhibits Ni leaching to improve the durability in two accelerated durability test modes mimicking the catalyst lifetime and start-up/shut-down cycles.
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Affiliation(s)
- Jing-Fang Huang
- Department of Chemistry , National Chung Hsing University , Taichung 402 , Taiwan , Republic of China .
| | - Po-Kai Tseng
- Department of Chemistry , National Chung Hsing University , Taichung 402 , Taiwan , Republic of China .
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17
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Lapp AS, Duan Z, Marcella N, Luo L, Genc A, Ringnalda J, Frenkel AI, Henkelman G, Crooks RM. Experimental and Theoretical Structural Investigation of AuPt Nanoparticles Synthesized Using a Direct Electrochemical Method. J Am Chem Soc 2018; 140:6249-6259. [DOI: 10.1021/jacs.7b12306] [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)
| | | | - Nicholas Marcella
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | | | - Arda Genc
- Thermo Fisher Scientific, 5350 NE Dawson Creek Drive, Hillsboro, Oregon 97124, United States
| | - Jan Ringnalda
- Thermo Fisher Scientific, 5350 NE Dawson Creek Drive, Hillsboro, Oregon 97124, United States
| | - Anatoly I. Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
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18
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Legkaya DA, Solov’eva ND, Yakovlev AV. Physicomechanical properties of nickel coating deposited from sulfate nickel plating electrolyte using preliminary underpotential deposition. RUSS J APPL CHEM+ 2018. [DOI: 10.1134/s1070427217090129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Yuan Q, Takakusagi S, Wakisaka Y, Uemura Y, Wada T, Ariga H, Asakura K. Polarization-dependent Total Reflection Fluorescence X-ray Absorption Fine Structure (PTRF-XAFS) Studies on the Structure of a Pt Monolayer on Au(111) Prepared by the Surface-limited Redox Replacement Reaction. CHEM LETT 2017. [DOI: 10.1246/cl.170423] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Qiuyi Yuan
- ICAT, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021
| | - Satoru Takakusagi
- ICAT, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021
| | - Yuki Wakisaka
- ICAT, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021
| | - Yohei Uemura
- Institute for Molecular Science, Okazaki, Aichi 444-0867
| | | | - Hiroko Ariga
- ICAT, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021
| | - Kiyotaka Asakura
- ICAT, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021
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20
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Benson DM, Tsang CF, Sugar JD, Jagannathan K, Robinson DB, El Gabaly F, Cappillino PJ, Stickney JL. Enhanced Kinetics of Electrochemical Hydrogen Uptake and Release by Palladium Powders Modified by Electrochemical Atomic Layer Deposition. ACS APPLIED MATERIALS & INTERFACES 2017; 9:18338-18345. [PMID: 28449579 DOI: 10.1021/acsami.7b03005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Electrochemical atomic layer deposition (E-ALD) is a method for the formation of nanofilms of materials, one atomic layer at a time. It uses the galvanic exchange of a less noble metal, deposited using underpotential deposition (UPD), to produce an atomic layer of a more noble element by reduction of its ions. This process is referred to as surface limited redox replacement and can be repeated in a cycle to grow thicker deposits. It was previously performed on nanoparticles and planar substrates. In the present report, E-ALD is applied for coating a submicron-sized powder substrate, making use of a new flow cell design. E-ALD is used to coat a Pd powder substrate with different thicknesses of Rh by exchanging it for Cu UPD. Cyclic voltammetry and X-ray photoelectron spectroscopy indicate an increasing Rh coverage with increasing numbers of deposition cycles performed, in a manner consistent with the atomic layer deposition (ALD) mechanism. Cyclic voltammetry also indicated increased kinetics of H sorption and desorption in and out of the Pd powder with Rh present, relative to unmodified Pd.
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Affiliation(s)
- David M Benson
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Chu F Tsang
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Joshua D Sugar
- Sandia National Laboratories , Livermore, California 94550, United States
| | - Kaushik Jagannathan
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - David B Robinson
- Sandia National Laboratories , Livermore, California 94550, United States
| | - Farid El Gabaly
- Sandia National Laboratories , Livermore, California 94550, United States
| | - Patrick J Cappillino
- Sandia National Laboratories , Livermore, California 94550, United States
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth , North Dartmouth, Massachusetts 02747, United States
| | - John L Stickney
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
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21
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Kartal C, Hanedar Y, Öznülüer T, Demir Ü. Stoichiometry, Morphology, and Size-Controlled Electrochemical Fabrication of Cu xO (x = 1, 2) at Underpotential. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3960-3967. [PMID: 28391680 DOI: 10.1021/acs.langmuir.7b00340] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new one-step electrochemical approach has been developed for the morphology, size, and stoichiometry-controlled synthesis of Cu2O, CuO, and Cu2O/CuO composite structures at room temperature without using surfactants, capping agents, or any other additives. The electrochemical deposition of a Cu monolayer using underpotential deposition (UPD) and the flow rate of oxygen gas bubbled through the deposition solution used for oxidation of the Cu layer are the key parameters for controlling the stoichiometry of the CuxO (x = 1, 2) structures. The morphologies, crystallinity, stoichiometries, optical properties, and photoelectrochemical properties of the as-electrodeposited Cu2O and CuO materials were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS), UV-vis absorption, and photoelectrochemical (PEC) techniques. The results indicated that the Cu2O and CuO materials electrodeposited on both indium tin oxide coated (ITO) quartz and gold electrodes using this new electrochemical technique exhibit high-quality single crystalline structures and high photoactivity with rapid photoelectrical response to light irradiation.
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Affiliation(s)
- Cemile Kartal
- Faculty of Sciences, Department of Chemistry, Atatürk University , 25240 Erzurum, Turkey
| | - Yeşim Hanedar
- Faculty of Sciences, Department of Chemistry, Atatürk University , 25240 Erzurum, Turkey
| | - Tuba Öznülüer
- Faculty of Sciences, Department of Chemistry, Atatürk University , 25240 Erzurum, Turkey
| | - Ümit Demir
- Faculty of Sciences, Department of Chemistry, Atatürk University , 25240 Erzurum, Turkey
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23
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Pang L, Li M, Ma Q, Zhang Y, Ren X, Zhang D, Liu SF. Controlled Pt Monolayer Fabrication on Complex Carbon Fiber Structures for Superior Catalytic Applications. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.11.134] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Staikov G. Nanoscale electrodeposition of low-dimensional metal phases and clusters. NANOSCALE 2016; 8:13880-13892. [PMID: 27273215 DOI: 10.1039/c6nr01547f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The present status of the problem of electrochemical formation of low-dimensional metal phases is reviewed. The progress in this field achieved in the last two decades is discussed on the basis of experimental results obtained in selected electrochemical systems with well defined single crystal substrates. The influence of crystallographic orientation and surface inhomogeneities of foreign substrates on the mechanism of formation and the atomic structure of two-dimensional (2D) metal phases in the underpotential deposition range is considered. The localized electrodeposition of metal nanoclusters on solid state surfaces applying the STM-tip as a nanoelectrode is demonstrated.
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25
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Surface Limited Redox Replacement Deposition of Platinum Ultrathin Films on Gold: Thickness and Structure Dependent Activity towards the Carbon Monoxide and Formic Acid Oxidation reactions. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.05.161] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Dimitrov N. Recent Advances in the Growth of Metals, Alloys, and Multilayers by Surface Limited Redox Replacement (SLRR) Based Approaches. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.05.115] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Li M, Ma Q, Zi W, Liu X, Zhu X, Liu S(F. Pt monolayer coating on complex network substrate with high catalytic activity for the hydrogen evolution reaction. SCIENCE ADVANCES 2015; 1:e1400268. [PMID: 26601247 PMCID: PMC4643788 DOI: 10.1126/sciadv.1400268] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 07/05/2015] [Indexed: 05/19/2023]
Abstract
A deposition process has been developed to fabricate a complete-monolayer Pt coating on a large-surface-area three-dimensional (3D) Ni foam substrate using a buffer layer (Ag or Au) strategy. The quartz crystal microbalance, current density analysis, cyclic voltammetry integration, and X-ray photoelectron spectroscopy results show that the monolayer deposition process accomplishes full coverage on the substrate and the deposition can be controlled to a single atomic layer thickness. To our knowledge, this is the first report on a complete-monolayer Pt coating on a 3D bulk substrate with complex fine structures; all prior literature reported on submonolayer or incomplete-monolayer coating. A thin underlayer of Ag or Au is found to be necessary to cover a very reactive Ni substrate to ensure complete-monolayer Pt coverage; otherwise, only an incomplete monolayer is formed. Moreover, the Pt monolayer is found to work as well as a thick Pt film for catalytic reactions. This development may pave a way to fabricating a high-activity Pt catalyst with minimal Pt usage.
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Affiliation(s)
- Man Li
- Key Laboratory for Applied Surface and Colloid Chemistry, National Ministry of Education, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Qiang Ma
- Key Laboratory for Applied Surface and Colloid Chemistry, National Ministry of Education, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Wei Zi
- Key Laboratory for Applied Surface and Colloid Chemistry, National Ministry of Education, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Xiaojing Liu
- Key Laboratory for Applied Surface and Colloid Chemistry, National Ministry of Education, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Xuejie Zhu
- Key Laboratory for Applied Surface and Colloid Chemistry, National Ministry of Education, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Shengzhong (Frank) Liu
- Key Laboratory for Applied Surface and Colloid Chemistry, National Ministry of Education, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, China
- Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
- Corresponding author. E-mail:
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28
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Yang T, Cao G, Huang Q, Ma Y, Wan S, Zhao H, Li N, Sun X, Yin F. Surface-Limited Synthesis of Pt Nanocluster Decorated Pd Hierarchical Structures with Enhanced Electrocatalytic Activity toward Oxygen Reduction Reaction. ACS APPLIED MATERIALS & INTERFACES 2015; 7:17162-17170. [PMID: 26181191 DOI: 10.1021/acsami.5b04021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Exploring superior catalysts with high catalytic activity and durability is of significant for the development of an electrochemical device involving the oxygen reduction reaction. This work describes the synthesis of Pt-on-Pd bimetallic heterogeneous nanostructures, and their high electrocatalytic activity toward the oxygen reduction reaction (ORR). Pt nanoclusters with a size of 1-2 nm were generated on Pd nanorods (NRs) through a modified Cu underpotential deposition (UPD) process free of potential control and a subsequent surface-limited redox reaction. The Pt nanocluster decorated Pd nanostructure with a ultralow Pt content of 1.5 wt % exhibited a mass activity of 105.3 mA mg(-1) (Pt-Pd) toward ORR, comparable to that of the commercial Pt/C catalyst but 4 times higher than that of carbon supported Pd NRs. More importantly, the carbon supported Pt-on-Pd catalyst displays relatively small losses of 16% in electrochemical surface area (ECSA) and 32% in mass activity after 10 000 potential sweeps, in contrast to respective losses of 46 and 64% for the commercial Pt/C catalyst counterpart. The results demonstrated that Pt decoration might be an efficient way to improve the electrocatalytic activity of Pd and in turn allow Pd to be a promising substitution for commercial Pt catalyst.
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Affiliation(s)
- Tao Yang
- †School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, People's Republic of China
| | - Guojian Cao
- ‡School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, People's Republic of China
| | - Qingli Huang
- §Testing Center, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Yanxia Ma
- †School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, People's Republic of China
| | - Sheng Wan
- †School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, People's Republic of China
| | - Hong Zhao
- †School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, People's Republic of China
| | - Na Li
- †School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, People's Republic of China
| | - Xia Sun
- †School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, People's Republic of China
| | - Fujun Yin
- †School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, People's Republic of China
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29
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Ambrozik S, Dimitrov N. The Deposition of Pt via Electroless Surface Limited Redox Replacement. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.04.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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30
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Abdelhafiz A, Vitale A, Joiner C, Vogel E, Alamgir FM. Layer-by-layer evolution of structure, strain, and activity for the oxygen evolution reaction in graphene-templated Pt monolayers. ACS APPLIED MATERIALS & INTERFACES 2015; 7:6180-6188. [PMID: 25730297 DOI: 10.1021/acsami.5b00182] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, we explore the dimensional aspect of structure-driven surface properties of metal monolayers grown on a graphene/Au template. Here, surface limited redox replacement (SLRR) is used to provide precise layer-by-layer growth of Pt monolayers on graphene. We find that after a few iterations of SLRR, fully wetted 4-5 monolayer Pt films can be grown on graphene. Incorporating graphene at the Pt-Au interface modifies the growth mechanism, charge transfers, equilibrium interatomic distances, and associated strain of the synthesized Pt monolayers. We find that a single layer of sandwiched graphene is able to induce a 3.5% compressive strain on the Pt adlayer grown on it, and as a result, catalytic activity is increased due to a greater areal density of the Pt layers beyond face-centered-cubic close packing. At the same time, the sandwiched graphene does not obstruct vicinity effects of near-surface electron exchange between the substrate Au and adlayers Pt. X-ray photoelectron spectroscopy (XPS) and extended X-ray absorption fine structure (EXAFS) techniques are used to examine charge mediation across the Pt-graphene-Au junction and the local atomic arrangement as a function of the Pt adlayer dimension. Cyclic voltammetry (CV) and the oxygen reduction reaction (ORR) are used as probes to examine the electrochemically active area of Pt monolayers and catalyst activity, respectively. Results show that the inserted graphene monolayer results in increased activity for the Pt due to a graphene-induced compressive strain, as well as a higher resistance against loss of the catalytically active Pt surface.
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Affiliation(s)
- Ali Abdelhafiz
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332, United States
| | - Adam Vitale
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332, United States
| | - Corey Joiner
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332, United States
| | - Eric Vogel
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332, United States
| | - Faisal M Alamgir
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332, United States
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31
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Ahn SH, Liu Y, Moffat TP. Ultrathin Platinum Films for Methanol and Formic Acid Oxidation: Activity as a Function of Film Thickness and Coverage. ACS Catal 2015. [DOI: 10.1021/cs501228j] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Sang Hyun Ahn
- Materials Science and Engineering
Division, Material Measurement Laboratory, National Institute of Standard and Technology (NIST), 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
| | - Yihua Liu
- Materials Science and Engineering
Division, Material Measurement Laboratory, National Institute of Standard and Technology (NIST), 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
| | - Thomas P. Moffat
- Materials Science and Engineering
Division, Material Measurement Laboratory, National Institute of Standard and Technology (NIST), 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
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32
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Yan X, Xiong H, Bai Q, Frenzel J, Si C, Chen X, Eggeler G, Zhang Z. Atomic layer-by-layer construction of Pd on nanoporous gold via underpotential deposition and displacement reaction. RSC Adv 2015. [DOI: 10.1039/c4ra17014h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ultrathin Pd films with one to five atomic layers were decorated on nanoporous gold by underpotential deposition and galvanic displacement.
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Affiliation(s)
- Xuejiao Yan
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Shandong University
- Jinan
- P.R. China
| | - Haiyan Xiong
- Center for Advanced Energy Materials & Technology Research (AEMT), and School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- China
| | - Qingguo Bai
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Shandong University
- Jinan
- P.R. China
| | - Jan Frenzel
- Institut für Werkstoffe
- Ruhr Universität Bochum
- Bochum 44780
- Germany
| | - Conghui Si
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Shandong University
- Jinan
- P.R. China
| | - Xiaoting Chen
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Shandong University
- Jinan
- P.R. China
| | - Gunther Eggeler
- Institut für Werkstoffe
- Ruhr Universität Bochum
- Bochum 44780
- Germany
| | - Zhonghua Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Shandong University
- Jinan
- P.R. China
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33
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Qin SJ, Zhao Y, Peng F, Chen XQ, Pan GB. Dispersing Pt and Pd atoms on Au nanoparticles deposited on n-GaN substrates for formic acid oxidation. RSC Adv 2015. [DOI: 10.1039/c5ra16807d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Au nanoparticles, with dispersed Pt and Pd atoms on them, supported on n-GaN substrates were prepared. The catalysts showed an enhanced performance for formic acid oxidation, and the mass activity reached 3.5 mA μgPtPd−1.
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Affiliation(s)
- S.-J. Qin
- Department of Chemistry
- College of Sciences
- Shanghai University
- 200444 Shanghai
- China
| | - Y. Zhao
- Suzhou Institute of Nano-tech and Nano-bionics
- Chinese Academy of Sciences
- 215123 Suzhou
- China
| | - F. Peng
- Suzhou Institute of Nano-tech and Nano-bionics
- Chinese Academy of Sciences
- 215123 Suzhou
- China
| | - X.-Q. Chen
- Suzhou Institute of Nano-tech and Nano-bionics
- Chinese Academy of Sciences
- 215123 Suzhou
- China
| | - G.-B. Pan
- Suzhou Institute of Nano-tech and Nano-bionics
- Chinese Academy of Sciences
- 215123 Suzhou
- China
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34
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Bliznakov S, Vukmirovic M, Adzic R. Electrochemical Atomic-level Controlled Syntheses of Electrocatalysts for the Oxygen Reduction Reaction. ATOMICALLY-PRECISE METHODS FOR SYNTHESIS OF SOLID CATALYSTS 2014. [DOI: 10.1039/9781782628439-00144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
It is becoming apparent that the electrocatalysts consisting of a platinum (Pt) monolayer (ML) shell on a metal, or alloy nanoparticle cores are one of the most promising classes of fuel cell catalysts offering ultra-low Pt content, complete Pt utilization, very high activity and excellent performance stability. In this chapter, the electrochemical strategies for depositing a Pt ML-shell on various nanostructured cores are discussed. The advantages of the electrodeposition techniques over the conventional chemical methods for synthesis of electrocatalysts for the oxygen reduction reaction are described. Illustrations include the electrodeposition of Pt ML on mono- and bi-metallic (Pd, PdAu, PdIr, NiW) nanostructures on functionalized carbons that creates highly efficient cathode electrocatalysts for proton exchange membrane fuel cells. These features, and a simple scale-up of this syntheses, make the electrodeposition strategies a viable way of solving the remaining obstacles hindering the fuel cell commercialization.
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Affiliation(s)
- Stoyan Bliznakov
- Chemistry Department, Brookhaven National Laboratory Upton NY 11973 USA adzic(bnl.gov
| | - Miomir Vukmirovic
- Chemistry Department, Brookhaven National Laboratory Upton NY 11973 USA adzic(bnl.gov
| | - Radoslav Adzic
- Chemistry Department, Brookhaven National Laboratory Upton NY 11973 USA adzic(bnl.gov
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35
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Mkwizu TS, Cukrowski I. Physico–chemical Modelling of Adlayer Phase Formation via Surface–limited Reactions of Copper in Relation to Sequential Electrodeposition of Multilayered Platinum on Crystalline Gold. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.09.086] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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36
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Enhanced Adhesion of Continuous Nanoporous Au Layers by Thermochemical Oxidation of Glassy Carbon. COATINGS 2014. [DOI: 10.3390/coatings4030416] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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37
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Hydrogen sorption properties of bare and Rh-modified Pd nanofilms grown via surface limited redox replacement reactions. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.10.096] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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38
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Kim J, Shin D, Rhee CK, Yoon SH. Formation of single-layered Pt islands on Au(111) using irreversible adsorption of Pt and selective adsorption of CO to Pt. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4203-4206. [PMID: 24694250 DOI: 10.1021/la500005p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This communication compares two different multiple deposition routes of Pt on Au(111), using irreversible adsorption of Pt precursor ions and selective adsorption of CO. A scanning tunneling microscopy study revealed that the conventional route, not utilizing CO, produced multiple-layered Pt cluster islands, while the CO route, employing CO, formed single-layered Pt islands exclusively. The role of CO selectively adsorbed on pre-existing Pt islands was to prevent additional irreversible adsorption of Pt precursor ions onto Pt islands. Cyclic voltammetric works disclosed that the CO and hydrogen coverages on single-layered Pt islands were higher than those on multiple-layered ones, and that the Pt islands on Au were more effective in adsorbing CO than hydrogen.
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Affiliation(s)
- Jandee Kim
- Department of Chemistry, Chungnam National University , Daejeon 305-764, Korea
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39
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Jayaraju N, Banga D, Thambidurai C, Liang X, Kim YG, Stickney JL. PtRu nanofilm formation by electrochemical atomic layer deposition (E-ALD). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:3254-3263. [PMID: 24568151 DOI: 10.1021/la403018v] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The high CO tolerance of PtRu electrocatalysis, compared with pure Pt and other Pt-based alloys, makes it interesting as an anode material in proton exchange membrane fuel cells (PEMFC) and direct methanol fuel cells (DMFC). This report describes the formation of bimetallic PtRu nanofilms using the electrochemical form of atomic layer deposition (E-ALD). Metal nanofilm formation using E-ALD is facilitated by use of surface-limited redox replacement (SLRR), where an atomic layer (AL) of a sacrificial metal is first formed by UPD. The AL is then spontaneously exchanged for a more noble metal at the open-circuit potential (OCP). In the present study, PtRu nanofilms were formed using SLRR for Pt and Ru, and Pb UPD was used to form the sacrificial layers. The PtRu E-ALD cycle consisted of Pb UPD at -0.19 V, followed by replacement using Pt(IV) ions at OCP, rinsing with blank, then Pb UPD at -0.19 V, followed by replacement using Ru(III) ions at OCP. PtRu nanofilm thickness was controlled by the number of times the cycle was repeated. PtRu nanofilms with atomic proportions of 70/30, 82/18, and 50/50 Pt/Ru were formed on Au on glass slides using related E-ALD cycles. The charge for Pb UPD and changes in the OCP during replacement were monitored during the deposition process. The PtRu films were then characterized by CO adsorption and electrooxidation to determine their overpotentials. The 50/50 PtRu nanofilms displayed the lowest CO electrooxidation overpotentials as well as the highest currents, compared with the other alloy compositions, pure Pt, and pure Ru. In addition, CO electrooxidation studies of the terminating AL on the 50/50 PtRu nanostructured alloy were investigated by deposition of one or two SLRR of Pt, Ru, or PtRu on top.
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Affiliation(s)
- Nagarajan Jayaraju
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
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40
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Nutariya J, Fayette M, Dimitrov N, Vasiljevic N. Growth of Pt by surface limited redox replacement of underpotentially deposited hydrogen. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.01.052] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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41
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Photoelectrochemical properties of nanostructured ZnO prepared by controlled electrochemical underpotential deposition. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.06.135] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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42
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Brimaud S, Behm RJ. Electrodeposition of a Pt Monolayer Film: Using Kinetic Limitations for Atomic Layer Epitaxy. J Am Chem Soc 2013; 135:11716-9. [DOI: 10.1021/ja4051795] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sylvain Brimaud
- Institute of Surface Chemistry
and Catalysis, Ulm University, Albert-Einstein-Allee
47, D-89063 Ulm,
Germany
| | - R. Jürgen Behm
- Institute of Surface Chemistry
and Catalysis, Ulm University, Albert-Einstein-Allee
47, D-89063 Ulm,
Germany
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43
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Sheridan LB, Gebregziabiher DK, Stickney JL, Robinson DB. Formation of palladium nanofilms using electrochemical atomic layer deposition (E-ALD) with chloride complexation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1592-1600. [PMID: 23228276 DOI: 10.1021/la303816z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Pd thin films were formed by electrochemical atomic layer deposition (E-ALD) using surface-limited redox replacement (SLRR) of Cu underpotential deposits (UPD) on polycrystalline Au substrates. An automated electrochemical flow deposition system was used to deposit Pd atomic layers using a sequence of steps referred to as a cycle. The initial step was Cu UPD, followed by its exchange for Pd ions at open circuit, and finishing with a blank rinse to complete the cycle. Deposits were formed with up to 75 cycles and displayed proportional deposit thicknesses. Previous reports by this group indicated excess Pd deposition at the flow cell ingress, from electron probe microanalysis (EPMA). Those results suggested that the SLRR mechanism did not involve direct transfer between a Cu(UPD) atom and a Pd(2+) ion that would take its position. Instead, it was proposed that electrons are transferred through the metallic surface to reduce Pd(2+) ions near the surface where their activity is highest. It was proposed that if the cell was filled completely before a significant fraction of the Cu(UPD) atoms had been oxidized then the deposit would be homogeneous. Previous work with EDTA indicated that the hypothesis had merit, but it proved to be very sensitive to the EDTA concentration. In the present study, chloride was used to complex Pd(2+) ions, forming PdCl(4)(2-), to slow the exchange rate. Both complexing agents led to a decrease in the rate of replacement, producing more homogeneous films. Although the use of EDTA improved the homogeneity, it also decreased the deposit thickness by a factor of 3 compared to the thickness obtained via the use of chloride.
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Affiliation(s)
- Leah B Sheridan
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
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44
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Wu Q, Li Y, Xian H, Xu C, Wang L, Chen Z. Ultralow Pt-loading bimetallic nanoflowers: fabrication and sensing applications. NANOTECHNOLOGY 2013; 24:025501. [PMID: 23220775 DOI: 10.1088/0957-4484/24/2/025501] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Ultralow Pt-loading Au nanoflowers (AuNFs) were synthesized on a glassy carbon electrode surface by the underpotential deposition (UPD) monolayer redox replacement technique, which involves redox replacement of a copper UPD monolayer by PtCl(4)(2-) that can be reduced and deposited simultaneously. Field-emission scanning electron microscopy, energy dispersive spectroscopy, x-ray photoelectron spectroscopy and the electrochemical method were utilized to characterize the ultralow Pt-loading AuNFs. Cyclic voltammogram results showed that the ultralow Pt-loading AuNFs exhibited excellent electrocatalytic activity towards the reduction of hydrogen peroxide and the oxidation of glucose in neutral media, and the reaction pathway of glucose oxidation was changed from an intermediate process based on the electrosorption of glucose to a direct oxidation process. From chronoamperometric results, it could be obtained that this prepared biosensor had wide linear ranges and very low detection limits (DLs) for H(2)O(2) (0.025-94.3 μM; DL = 0.006 μM) and glucose (0.0028-8.0 mM; DL = 0.8 μM), which were much better than previous results.
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Affiliation(s)
- Qingqing Wu
- College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, People's Republic of China
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Li M, Liu P, Adzic RR. Platinum Monolayer Electrocatalysts for Anodic Oxidation of Alcohols. J Phys Chem Lett 2012; 3:3480-3485. [PMID: 26290976 DOI: 10.1021/jz3016155] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The slow, incomplete oxidation of methanol and ethanol on platinum-based anodes as well as the high price and limited reserves of Pt has hampered the practical application of direct alcohol fuel cells. We describe the electrocatalysts consisting of one Pt monolayer (one atom thick layer) placed on extended or nanoparticle surfaces having the activity and selectivity for the oxidation of alcohol molecules that can be controlled with platinum-support interaction. The suitably expanded Pt monolayer (i.e., Pt/Au(111)) exhibits a factor of 7 activity increase in catalyzing methanol electrooxidation relative to Pt(111). Sizable enhancement is also observed for ethanol electrooxidation. Furthermore, a correlation between substrate-induced lateral strain in a Pt monolayer and its activity/selectivity is established and rationalized by experimental and theoretical studies. The knowledge we gained with single-crystal model catalysts was successfully applied in designing real nanocatalysts. These findings for alcohols are likely to be applicable for the oxidation of other classes of organic molecules.
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Affiliation(s)
- Meng Li
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Ping Liu
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Radoslav R Adzic
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
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Mitchell C, Fayette M, Dimitrov N. Homo- and hetero-epitaxial deposition of Au by surface limited redox replacement of Pb underpotentially deposited layer in one-cell configuration. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.08.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Yuan Q, Tripathi A, Slavkovic M, Brankovic SR. Lead Underpotential Deposition on Pt-submonolayer Modified Au(111). ACTA ACUST UNITED AC 2012. [DOI: 10.1524/zpch.2012.0254] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Lead underpotential deposition on Au(111) surface modified with submonolayer of Pt is studied using cyclic voltammetry and in situ scanning tunneling microscopy methods. The two-dimensional Pt submonolayers (nanoclusters) on Au(111) were obtained by spontaneous Pt deposition on Au(111) from × 103 M {PtCl6}2− + 0.1 M HClO4 solution. The in situ scanning tunneling microscopy data were analyzed using statistical image processing algorithm which enabled quantification of the morphology change on Pt-modified Au(111) surface as a function of applied underpotential. The results suggest that Pb underpotential deposition starts on Au steps and other surface defects, similar to Pb underpotential deposition on Au(111). The further process proceeds by Pb monolayer nucleation and growth on Au terraces into a complete layer. In parallel, the Pb monolayer starts to nucleate on top of the Pt nanoclusters. The final stage of the Pb underpotential deposition is formation of the compact Pb nanoclusters/layer on top of the pre-existing Pt nanoclusters. The scanning tunneling microscopy data suggests that morphology of underpotentially deposited Pb monolayer on Pt-modified Au(111) is similar to the starting surface in terms of the areal density of nanoclusters, their size and shape. The morphological changes of the Pt modified Au(111) surface during Pb underpotential deposition are correlated with cyclic voltammetry results.
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Affiliation(s)
- Qiuyi Yuan
- University of Houston, Electrical and Computer Engineering Department, Houston Texas, U.S.A
| | - Ashish Tripathi
- University of Houston, Electrical and Computer Engineering Department, Houston Texas, U.S.A
| | - Milan Slavkovic
- University of Houston, Biomedical Engineering Department, Houston Texas, U.S.A
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Bromberg L, Fayette M, Martens B, Luo ZP, Wang Y, Xu D, Zhang J, Fang J, Dimitrov N. Catalytic Performance Comparison of Shape-Dependent Nanocrystals and Oriented Ultrathin Films of Pt4Cu Alloy in the Formic Acid Oxidation Process. Electrocatalysis (N Y) 2012. [DOI: 10.1007/s12678-012-0109-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Hossain MA, Cummins KD, Park YS, Soriaga MP, Stickney JL. Layer-by-Layer Deposition of Pd on Pt(111) Electrode: an Electron Spectroscopy–Electrochemistry Study. Electrocatalysis (N Y) 2012. [DOI: 10.1007/s12678-012-0102-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Electrochemical Atomic Layer Deposition (E-ALD) of Palladium Nanofilms by Surface Limited Redox Replacement (SLRR), with EDTA Complexation. Electrocatalysis (N Y) 2012. [DOI: 10.1007/s12678-012-0080-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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