1
|
Shiba S, Ogata A, Matsushita S, Niwa O, Kunitake M, Matsuguchi M, Komoda M, Nishina Y. Diverse Hierarchical Meso/Nanoporous Pt Film Electrocatalysts Prepared via Hydrogen Adsorption-Assisted Dynamic Soft Templating. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:16349-16360. [PMID: 39046223 DOI: 10.1021/acs.langmuir.4c01567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
In this study, we present an innovative approach for creating hierarchical meso/nanoporous Pt films using dynamic soft templating. The fabrication process, called dynamic soft templating, involves Pt electrodeposition within a specialized bicontinuous microemulsion (BME) system characterized by a sophisticated three-dimensional network comprising water and oil phases, surfactants, and cosurfactants. Pt electrodeposition exclusively occurs in the water phase of the BME. This results in a porous Pt film exhibiting a nanostructure mirroring the oil solution/water solution nanostructure (solution/solution structure) of the BME, the size of which can be tailored by adjusting the BME composition. Through a simultaneous interplay of Pt electrodeposition and overpotential deposition of hydrogen (H-OPD, dissociative adsorption of water), potential-dependent Pt mesostructures are dynamically shaped. As a result, we achieve diverse morphologies in the form of hierarchical meso/nanoporous Pt films. The potential applications of the films are evaluated as electrocatalysts for the methanol oxidation reaction (MOR), and it was found that the electrocatalytic performances seem to be sensitive to nanoporosity and not relevant to mesoporosity.
Collapse
Affiliation(s)
- Shunsuke Shiba
- Advanced Materials Research Laboratory, NiSiNa Materials Co. Ltd., 2-6-20-3, Kitagata, Kita-ku, Okayama 700-0803, Japan
| | - Ayano Ogata
- Department of Applied Chemistry, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
| | - Shin Matsushita
- Department of Applied Chemistry, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
| | - Osamu Niwa
- Advanced Science Research Laboratory, Saitama Institute of Technology, 1690 Fusaiji, Fukaya, Saitama 369-0293, Japan
| | - Masashi Kunitake
- Institute of Industrial Nanomaterials, Kumamoto University, 2-39-1 Kurokami, Chuou-ku, Kumamoto 860-8555, Japan
| | - Masanobu Matsuguchi
- Department of Applied Chemistry, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
| | - Masato Komoda
- The Research Institute for Interdisciplinary Science, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Yuta Nishina
- The Research Institute for Interdisciplinary Science, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| |
Collapse
|
2
|
Li C, Clament Sagaya Selvam N, Fang J. Shape-Controlled Synthesis of Platinum-Based Nanocrystals and Their Electrocatalytic Applications in Fuel Cells. NANO-MICRO LETTERS 2023; 15:83. [PMID: 37002489 PMCID: PMC10066057 DOI: 10.1007/s40820-023-01060-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 02/28/2023] [Indexed: 06/05/2023]
Abstract
To achieve environmentally benign energy conversion with the carbon neutrality target via electrochemical reactions, the innovation of electrocatalysts plays a vital role in the enablement of renewable resources. Nowadays, Pt-based nanocrystals (NCs) have been identified as one class of the most promising candidates to efficiently catalyze both the half-reactions in hydrogen- and hydrocarbon-based fuel cells. Here, we thoroughly discuss the key achievement in developing shape-controlled Pt and Pt-based NCs, and their electrochemical applications in fuel cells. We begin with a mechanistic discussion on how the morphology can be precisely controlled in a colloidal system, followed by highlighting the advanced development of shape-controlled Pt, Pt-alloy, Pt-based core@shell NCs, Pt-based nanocages, and Pt-based intermetallic compounds. We then select some case studies on models of typical reactions (oxygen reduction reaction at the cathode and small molecular oxidation reaction at the anode) that are enhanced by the shape-controlled Pt-based nanocatalysts. Finally, we provide an outlook on the potential challenges of shape-controlled nanocatalysts and envision their perspective with suggestions.
Collapse
Affiliation(s)
- Can Li
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY, USA
| | | | - Jiye Fang
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY, USA.
| |
Collapse
|
3
|
Chemical functionalized noble metal nanocrystals for electrocatalysis. CHINESE JOURNAL OF CATALYSIS 2023. [DOI: 10.1016/s1872-2067(22)64186-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
4
|
Ji SG, Kwon HC, Kim TH, Sim U, Choi CH. Does the Encapsulation Strategy of Pt Nanoparticles with Carbon Layers Really Ensure Both Highly Active and Durable Electrocatalysis in Fuel Cells? ACS Catal 2022. [DOI: 10.1021/acscatal.2c01618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sang Gu Ji
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Han Chang Kwon
- The CARBON STUDIO, Inc. R&D Center, Daejeon 34015, Republic of Korea
| | - Tae-Hoon Kim
- Department of Materials Science and Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Uk Sim
- School of Energy Technology, Korea Institute of Energy Technology (KENTECH), Jeollanamdo 58330, Republic of Korea
| | - Chang Hyuck Choi
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| |
Collapse
|
5
|
García-Cruz L, Montiel V, Solla-Gullón J. Shape-controlled metal nanoparticles for electrocatalytic applications. PHYSICAL SCIENCES REVIEWS 2019. [DOI: 10.1515/psr-2017-0124] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Abstract
The application of shape-controlled metal nanoparticles is profoundly impacting the field of electrocatalysis. On the one hand, their use has remarkably enhanced the electrocatalytic activity of many different reactions of interest. On the other hand, their usage is deeply contributing to a correct understanding of the correlations between shape/surface structure and electrochemical reactivity at the nanoscale. However, from the point of view of an electrochemist, there are a number of questions that must be fully satisfied before the evaluation of the shaped metal nanoparticles as electrocatalysts including (i) surface cleaning, (ii) surface structure characterization, and (iii) correlations between particle shape and surface structure. In this chapter, we will cover all these aspects. Initially, we will collect and discuss about the different practical protocols and procedures for obtaining clean shaped metal nanoparticles. This is an indispensable requirement for the establishment of correct correlations between shape/surface structure and electrochemical reactivity. Next, we will also report how some easy-to-do electrochemical experiments including their subsequent analyses can enormously contribute to a detailed characterization of the surface structure of the shaped metal nanoparticles. At this point, we will remark that the key point determining the resulting electrocatalytic activity is the surface structure of the nanoparticles (obviously, the atomic composition is also extremely relevant) but not the particle shape. Finally, we will summarize some of the most significant advances/results on the use of these shaped metal nanoparticles in electrocatalysis covering a wide range of electrocatalytic reactions including fuel cell-related reactions (electrooxidation of formic acid, methanol and ethanol and oxygen reduction) and also CO2 electroreduction.
Graphical Abstract:
Collapse
|
6
|
Gamler JTL, Ashberry HM, Skrabalak SE, Koczkur KM. Random Alloyed versus Intermetallic Nanoparticles: A Comparison of Electrocatalytic Performance. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1801563. [PMID: 29984851 DOI: 10.1002/adma.201801563] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 04/12/2018] [Indexed: 05/15/2023]
Abstract
As synthetic methods advance for metal nanoparticles, more rigorous studies of structure-function relationships can be made. Many electrocatalytic processes depend on the size, shape, and composition of the nanocatalysts. Here, the properties and electrocatalytic behavior of random alloyed and intermetallic nanoparticles are compared. Beginning with an introduction of metallic nanoparticles for catalysis and the unique features of bimetallic compositions, the discussion transitions to case studies of nanoscale electrocatalysts where direct comparisons of alloy and intermetallic compositions are undertaken for methanol electrooxidation, formic acid electrooxidation, the oxygen reduction reaction, and the electroreduction of carbon dioxide (CO2 ). Design and synthesis strategies for random alloyed and intermetallic nanoparticles are discussed, with an emphasis on Pt-M and Cu-M compositions as model systems. The differences in catalytic performance between alloys and intermetallic nanoparticles are highlighted in order to provide an outlook for future electrocatalyst design.
Collapse
Affiliation(s)
- Jocelyn T L Gamler
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN, 47405, USA
| | - Hannah M Ashberry
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN, 47405, USA
| | - Sara E Skrabalak
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN, 47405, USA
| | - Kallum M Koczkur
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN, 47405, USA
| |
Collapse
|
7
|
Li J, Rong H, Tong X, Wang P, Chen T, Wang Z. Platinum–silver alloyed octahedral nanocrystals as electrocatalyst for methanol oxidation reaction. J Colloid Interface Sci 2018; 513:251-257. [DOI: 10.1016/j.jcis.2017.11.039] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Accepted: 11/12/2017] [Indexed: 10/18/2022]
|
8
|
Preface. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
9
|
Vidal-Iglesias FJ, Solla-Gullón J, Feliu JM. Recent Advances in the Use of Shape-Controlled Metal Nanoparticles in Electrocatalysis. NANOSTRUCTURE SCIENCE AND TECHNOLOGY 2016. [DOI: 10.1007/978-3-319-29930-3_2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
|
10
|
Abstract
A novel process is developed to prepare highly efficient single site Pt(111) hexagonal nanocrystals on a carbon support for the asymmetric hydrogenation of α-ketoesters.
Collapse
Affiliation(s)
- Poonam Sharma
- Department of Chemistry
- Indian Institute of Technology Jodhpur
- India
| | - Rakesh K. Sharma
- Department of Chemistry
- Indian Institute of Technology Jodhpur
- India
| |
Collapse
|
11
|
Mahata A, Rawat KS, Choudhuri I, Pathak B. Cuboctahedral vs. octahedral platinum nanoclusters: insights into the shape-dependent catalytic activity for fuel cell applications. Catal Sci Technol 2016. [DOI: 10.1039/c6cy01709f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The shape of a catalyst plays an important role in any catalytic reaction.
Collapse
Affiliation(s)
- Arup Mahata
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology (IIT) Indore
- Indore
- India
| | - Kuber Singh Rawat
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology (IIT) Indore
- Indore
- India
| | - Indrani Choudhuri
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology (IIT) Indore
- Indore
- India
| | - Biswarup Pathak
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology (IIT) Indore
- Indore
- India
| |
Collapse
|
12
|
Dhavale VM, Kurungot S. Cu–Pt Nanocage with 3-D Electrocatalytic Surface as an Efficient Oxygen Reduction Electrocatalyst for a Primary Zn–Air Battery. ACS Catal 2015. [DOI: 10.1021/cs501571e] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Vishal M. Dhavale
- Physical
and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, Maharashtra, India
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110001, India
| | - Sreekumar Kurungot
- Physical
and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, Maharashtra, India
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110001, India
| |
Collapse
|
13
|
Chen J, Mao J, Zhao J, Ren M, Wei M. Surfactant-free platinum nanocubes with greatly enhanced activity towards methanol/ethanol electrooxidation. RSC Adv 2014. [DOI: 10.1039/c4ra03446e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
|
14
|
Anodic Oxidation of COads Derived from Methanol on Pt Electrocatalysts Linked to the Bonding Type and Adsorption Site. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
15
|
Levendorf AM, Sun SG, Tong YJ. In Situ FT-IR Investigation of Methanol and CO Electrooxidation on Cubic and Octahedral/Tetrahedral Pt Nanoparticles Having Residual PVP. Electrocatalysis (N Y) 2014. [DOI: 10.1007/s12678-014-0186-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
16
|
Levendorf AM, Chen DJ, Rom CL, Liu Y, Tong YJ. Electrochemical and in situ ATR-SEIRAS investigations of methanol and CO electro-oxidation on PVP-free cubic and octahedral/tetrahedral Pt nanoparticles. RSC Adv 2014. [DOI: 10.1039/c4ra00815d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The adsorbed PVP enhances further the MOR activity on the O/T but suppresses it on the cubic Pt NPs.
Collapse
Affiliation(s)
| | - De-Jun Chen
- Department of Chemistry
- Georgetown University
- Washington DC, USA
| | | | - Yangwei Liu
- Department of Chemistry
- Georgetown University
- Washington DC, USA
| | - YuYe J. Tong
- Department of Chemistry
- Georgetown University
- Washington DC, USA
| |
Collapse
|
17
|
|
18
|
Zaera F. Shape-controlled nanostructures in heterogeneous catalysis. CHEMSUSCHEM 2013; 6:1797-1820. [PMID: 24014476 DOI: 10.1002/cssc.201300398] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Indexed: 06/02/2023]
Abstract
Nanotechnologies have provided new methods for the preparation of nanomaterials with well-defined sizes and shapes, and many of those procedures have been recently implemented for applications in heterogeneous catalysis. The control of nanoparticle shape in particular offers the promise of a better definition of catalytic activity and selectivity through the optimization of the structure of the catalytic active site. This extension of new nanoparticle synthetic procedures to catalysis is in its early stages, but has shown some promising leads already. Here, we survey the major issues associated with this nanotechnology-catalysis synergy. First, we discuss new possibilities associated with distinguishing between the effects originating from nanoparticle size versus those originating from nanoparticle shape. Next, we survey the information available to date on the use of well-shaped metal and non-metal nanoparticles as active phases to control the surface atom ensembles that define the catalytic site in different catalytic applications. We follow with a brief review of the use of well-defined porous materials for the control of the shape of the space around that catalytic site. A specific example is provided to illustrate how new selective catalysts based on shape-defined nanoparticles can be designed from first principles by using fundamental mechanistic information on the reaction of interest obtained from surface-science experiments and quantum-mechanics calculations. Finally, we conclude with some thoughts on the state of the field in terms of the advances already made, the future potentials, and the possible limitations to be overcome.
Collapse
Affiliation(s)
- Francisco Zaera
- Department of Chemistry, University of California, Riverside, CA 92521 (USA).
| |
Collapse
|
19
|
Sarkar A, Kerr JB, Cairns EJ. Electrochemical Oxygen Reduction Behavior of Selectively Deposited Platinum Atoms on Gold Nanoparticles. Chemphyschem 2013; 14:2132-42. [DOI: 10.1002/cphc.201200917] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 02/06/2013] [Indexed: 11/06/2022]
|
20
|
Jaber S, Nasr P, Xin Y, Sleem F, Halaoui LI. Assemblies of polyvinylpyrrolidone-capped tetrahedral and spherical Pt nanoparticles in polyelectrolytes: hydrogen underpotential deposition and electrochemical characterization. Phys Chem Chem Phys 2013; 15:15223-33. [DOI: 10.1039/c3cp51061a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
21
|
Muthuswamy N, de la Fuente JLG, Ochal P, Giri R, Raaen S, Sunde S, Rønning M, Chen D. Towards a highly-efficient fuel-cell catalyst: optimization of Pt particle size, supports and surface-oxygen group concentration. Phys Chem Chem Phys 2013; 15:3803-13. [DOI: 10.1039/c3cp43659d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
22
|
Meher SK, Rao GR. Polymer-Assisted Hydrothermal Synthesis of Highly Reducible Shuttle-Shaped CeO2: Microstructural Effect on Promoting Pt/C for Methanol Electrooxidation. ACS Catal 2012. [DOI: 10.1021/cs300473e] [Citation(s) in RCA: 121] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Sumanta Kumar Meher
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - G. Ranga Rao
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| |
Collapse
|
23
|
Hofstead-Duffy AM, Chen DJ, Tong YJ. An in situ attenuated total reflection-surface enhanced infrared absorption spectroscopic study of enhanced methanol electro-oxidation activity on carbon-supported Pt nanoparticles by poly(vinylpyrrolidone) of different molecular weights. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.02.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
24
|
Balan BK, Kurungot S. Tuning the Functionality of a Carbon Nanofiber–Pt–RuO2 System from Charge Storage to Electrocatalysis. Inorg Chem 2012; 51:9766-74. [DOI: 10.1021/ic301147s] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Beena K. Balan
- Physical and Materials
Chemistry Division, National Chemical Laboratory, Pune 411 008, India
| | - Sreekumar Kurungot
- Physical and Materials
Chemistry Division, National Chemical Laboratory, Pune 411 008, India
| |
Collapse
|
25
|
Vidal-Iglesias FJ, Arán-Ais RM, Solla-Gullón J, Garnier E, Herrero E, Aldaz A, Feliu JM. Shape-dependent electrocatalysis: formic acid electrooxidation on cubic Pd nanoparticles. Phys Chem Chem Phys 2012; 14:10258-65. [DOI: 10.1039/c2cp40992e] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
26
|
Kim J, Kim S, Rhee CK. Preoxidation of CO on Os-modified Pt(111): a comparison with Ru-modified Pt(111). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:2044-2051. [PMID: 21244079 DOI: 10.1021/la103256k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The variation in CO adsorption structures during the preoxidation of CO on Os-modified Pt(111) (Pt(111)/Os) was investigated using cyclic voltammetry and electrochemical scanning tunneling microscopy. The spontaneous deposition of Os on Pt(111) resulted in randomly scattered islands with a coverage range of 0.13-0.54. During preoxidation on Pt(111)/Os, a phase transition from (2 × 2)-α to (√19 × √19) via the transient structures of (2 × 2)-β and (1 × 1) took place as on unmodified Pt(111). As the amount of Os increased, however, the transient structures of (2 × 2)-β and (1 × 1) appeared at lower potentials with higher populations. When the population of the transient structures was greater than 50%, an oxidative CO stripping process took place to the structure of (√19 × √19), completing the preoxidation. These observations strongly support the idea that the presence of Os increases the mobility of adsorbed CO by electronic modification of the Pt(111) surface (electronic effect). In addition, the results obtained with Pt(111)/Os were compared with those of Pt(111)/Ru.
Collapse
Affiliation(s)
- Jandee Kim
- Department of Chemistry, Chungnam National University, Dajeon 305-764, South Korea
| | | | | |
Collapse
|
27
|
Susut C, Tong YJ. Size-Dependent Methanol Electro-oxidation Activity of Pt Nanoparticles with Different Shapes. Electrocatalysis (N Y) 2011. [DOI: 10.1007/s12678-011-0041-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
28
|
Brimaud S, Jusys Z, Behm RJ. Controlled Surface Structure for In Situ ATR-FTIRS Studies Using Preferentially Shaped Pt Nanocrystals. Electrocatalysis (N Y) 2011. [DOI: 10.1007/s12678-011-0040-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
29
|
Hsu-Yao T, Browne KP, Honesty N, Tong YJ. Polyoxometalate-stabilized Pt nanoparticles and their electrocatalytic activities. Phys Chem Chem Phys 2011; 13:7433-8. [DOI: 10.1039/c0cp02805c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
30
|
|
31
|
Susut C, Chen DJ, Sun SG, Tong YJ. Capping polymer-enhanced electrocatalytic activity on Pt nanoparticles: a combined electrochemical and in situ IR spectroelectrochemical study. Phys Chem Chem Phys 2011; 13:7467-74. [DOI: 10.1039/c1cp20164f] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
32
|
Zhou ZY, Kang X, Song Y, Chen S. Butylphenyl-functionalized palladium nanoparticles as effective catalysts for the electrooxidation of formic acid. Chem Commun (Camb) 2011; 47:6075-7. [DOI: 10.1039/c1cc11235j] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
33
|
Vellacheri R, Unni SM, Nahire S, Kharul UK, Kurungot S. Pt–MoOx-carbon nanotube redox couple based electrocatalyst as a potential partner with polybenzimidazole membrane for high temperature Polymer Electrolyte Membrane Fuel Cell applications. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.01.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
34
|
Nakamura M, Hanioka Y, Ouchida W, Yamada M, Hoshi N. Estimation of Surface Structure and Carbon Monoxide Oxidation Site of Shape-Controlled Pt Nanoparticles. Chemphyschem 2009; 10:2719-24. [DOI: 10.1002/cphc.200900486] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|