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Radael GN, Oliveira GG, Pontes RM. A DFT study of ethanol interaction with the bimetallic clusters of PtSn and its implications on reactivity. J Mol Graph Model 2023; 125:108621. [PMID: 37689026 DOI: 10.1016/j.jmgm.2023.108621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/11/2023]
Abstract
The comprehension of the factors affecting the adsorption of ethanol over metals and metal alloys is a crucial step for the rational development of new catalysts for hydrogen production through ethanol reforming. In this work, we analyze the effect of combining Pt and Sn on a metal cluster on the complexation energy and reactivity for OH dehydrogenation of ethanol. Metal clusters of Pt10, Sn10 and Pt5Sn5 had their putative minimum located with the help of the artificial bee colony algorithm. Whereas the isolated Pt cluster shows a high degree of polarization (ESP surface), the Sn cluster shows a quite uniform electron density surface. The PtSn cluster is strongly polarized, with Pt atoms withdrawing electron density of Sn atoms. Complexation occurs with the oxygen atom of ethanol directed towards the point of highest electron potential in the ESP surface. Pt presents the highest complexation energy, -20.90 kcal/mol, against only -7.83 kcal/mol (at the B97-3c level). For the PtSn cluster, the value is intermediate, namely -12.39 kcal/mol. The more malleable electron density of Pt and its electron affinity are responsible for its highest complexation energy. These characteristics are partially transferred to the PtSn cluster. QTAIM results show that, for the PtSn cluster, the O-H bond in ethanol is somewhat weaker than for pure Pt and Sn. As a consequence, the energy barrier for the O-H dehydrogenation has its lowest value for the PtSn cluster, which shows that the alloying of two metals can lead to quite quite unexpected results opening the perspective for a more rational fine tuning of catalysts properties.
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Affiliation(s)
- Graziela N Radael
- Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5790, Maringá, Paraná, CEP 87900-020, Brazil
| | - Gabriel G Oliveira
- Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5790, Maringá, Paraná, CEP 87900-020, Brazil
| | - Rodrigo M Pontes
- Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5790, Maringá, Paraná, CEP 87900-020, Brazil.
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2
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Borup AB, Bertelsen AD, Kløve M, Christensen RS, Broge NLN, Dippel AC, Jørgensen MRV, Iversen BB. Unveiling the formation mechanism of Pb xPd y intermetallic phases in solvothermal synthesis using in situ X-ray total scattering. NANOSCALE 2023; 15:18481-18488. [PMID: 37942507 DOI: 10.1039/d3nr03901c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Pd possesses attractive catalytic properties and nano-structuring is an obvious way to enhance catalytic activity. Alloying Pd with Pb has been shown to enhance the catalytic effect of alcohol oxidation. Further optimization of the catalytic effect can be accomplished by controlling the particle size and key to this is understanding the formation mechanism. By monitoring solvothermal syntheses using in situ X-ray total scattering, this study unveils the formation mechanism of PbxPdy intermetallic nanoparticles. The formation occurs through a multi-step mechanism. Initially, Pd nanoparticles are formed, followed by incorporation of Pb into the Pd-structure, thus forming PbxPdy intermetallic nanoparticles. By varying the reaction time and temperature, the incorporation of Pb can be controlled, thereby tailoring the phase outcome. Based on the in situ solvothermal syntheses, ex situ autoclave syntheses were performed, resulting in the synthesis of Pb3Pd5 and Pb9Pd13 with a purity above 93%. The catalytic effect of these intermetallic phases towards the hydrogen evolution reaction (HER) is assessed. It is found that Pd, Pb3Pd5, and Pb9Pd13 have comparable stabilities, however, the overpotential increases with increasing amounts of Pb.
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Affiliation(s)
- Anders Bæk Borup
- Center for Integrated Materials Research, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark.
| | - Andreas Dueholm Bertelsen
- Center for Integrated Materials Research, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark.
| | - Magnus Kløve
- Center for Integrated Materials Research, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark.
| | - Rasmus Stubkjær Christensen
- Center for Integrated Materials Research, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark.
| | - Nils Lau Nyborg Broge
- Center for Integrated Materials Research, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark.
| | - Ann-Christin Dippel
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - Mads Ry Vogel Jørgensen
- Center for Integrated Materials Research, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark.
- MAX IV Laboratory, Lund University, 224 84 Lund, Sweden
| | - Bo Brummerstedt Iversen
- Center for Integrated Materials Research, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark.
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3
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Rigo VA, Baletto F. Pt 38 as a promising ethanol catalyst: a first principles study. Phys Chem Chem Phys 2023; 25:4649-4655. [PMID: 36722856 DOI: 10.1039/d2cp04323h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This first-principles study predicts Pt38 nanoparticles as a catalyst for ethanol reactions. Starting from the adsorption properties, we shed light on the effectiveness of Pt-based nanoclusters as ethanol catalysts. First, the ethanol adsorption on Pt38 shows that the most stable site positions the molecule with the oxygen anchored on top of an edge, whereas CH3 is oriented towards the facet and the molecule remains in trans-symmetry. The ethanol-oxygen adsorbed on top of a facet Pt-atom offers the least stable configuration and the longer Pt-O distance (2.318 Å), while the shorter Pt-O distance (2.237 Å) is found when ethanol is on top of an edge site and the molecule is vertically oriented with Gauche symmetry. A shorter Pt-O distance correlates with higher radial breathing of the nanoparticle after ethanol adsorption. Atomic charge redistribution is calculated on all the considered systems and cases. In any event, we show that the Pt-anchor receives a charge, whilst oxygen-ethanol donates electrons. Orbital analysis shows that Pt-anchors and ethanol-oxygen atoms primarily exchange p-charge. Energy barriers associated with the ethanol bond cleavage show that the C-C bond break is slightly more favourable on Pt38 than on an extended Pt(111). In addition, we find that the cleavage of the hydroxyl O-H ethanol bond shows a higher energy barrier while the removal of an H-atom from the CH3 group is easier. These three facts indicate that the Pt38 nanoparticle enhances ethanol catalysis and hence is a good candidate for ethanol-based fuel cells.
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Affiliation(s)
- Vagner Alexandre Rigo
- Department of Natural Sciences, Universidade Tecnológica Federal do Paraná (UTFPR), Cornélio Procópio, 86300-000, Brazil.
| | - Francesca Baletto
- Physics Department, University of Milan, Via Celoria 16, 20133, Italy.,Physics Department, King's College London, Strand WC2R 2LS, UK
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4
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Almeida CV, Huang H, Russell AE, Eguiluz KI, Salazar-Banda GR. Improving the catalytic activity of Pt-Rh/C towards ethanol oxidation through the addition of Pb. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Amorim FML, Crisafulli R, Linares JJ. An Alkaline-Acid Glycerol Electrochemical Reformer for Simultaneous Production of Hydrogen and Electricity. NANOMATERIALS 2022; 12:nano12081315. [PMID: 35458022 PMCID: PMC9024791 DOI: 10.3390/nano12081315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/06/2022] [Accepted: 04/08/2022] [Indexed: 11/28/2022]
Abstract
This study shows the results, for the first time, of an glycerol alkaline-acid electrolyzer. Such a configuration allows spontaneous operation, producing energy and hydrogen simultaneously as a result of the utilization of the neutralization and fuel chemical energy. The electroreformer—built with a 20 wt% Pd/C anode and cathode, and a Na+-pretreated Nafion® 117—can simultaneously produce hydrogen and electricity in the low current density region, whereas it operates in electrolysis mode at high current densities. In the spontaneous region, the maximum power densities range from 1.23 mW cm−2 at 30 °C to 11.9 mW cm−2 at 90 °C, with a concomitant H2 flux ranging from 0.0545 STP m−3 m−2 h−1 at 30 °C to 0.201 STP m−3 m−2 h−1 at 90 °C, due to the beneficial effect of the temperature on the performance. Furthermore, over a chronoamperometric test, the electroreformer shows a stable performance over 12 h. As a challenge, proton crossover from the cathode to the anode through the cation exchange Nafion® partially reduces the pH gradient, responsible for the extra electromotive force, thus requiring a less permeable membrane.
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Affiliation(s)
- Fernando M. L. Amorim
- Institute of Chemistry, Federal University of Goiás, Campus Samambaia, Avenida Esperança s/n, Goiania 74690-900, Brazil;
| | - Rudy Crisafulli
- Institute of Chemistry, University of Brasilia, Campus Universitário Darcy Ribeiro, Brasilia 70910-900, Brazil;
| | - José J. Linares
- Institute of Chemistry, University of Brasilia, Campus Universitário Darcy Ribeiro, Brasilia 70910-900, Brazil;
- Correspondence: ; Tel.: +55-6131-0739-01
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6
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The ethanol–metal interaction in bimetallic clusters of Pt and Rh. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02877-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Hamo ER, Rosen BA. Improved Durability and Activity in Pt/Mo
2
C Fuel Cell Cathodes by Magnetron Sputtering of Tantalum. ChemElectroChem 2021. [DOI: 10.1002/celc.202100591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Eliran R. Hamo
- Department of Materials Science and Engineering Tel Aviv University Tel Aviv-Yafo, Ramat Aviv 69978001 ISRAEL
| | - Brian A. Rosen
- Department of Materials Science and Engineering Tel Aviv University Tel Aviv-Yafo, Ramat Aviv 69978001 ISRAEL
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8
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Effect of platinum dispersity, platinum loading and Pt-Oxide coverage on oxygen reduction reaction in PEMFC-Cathode. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115414] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Filippov SP, Yaroslavtsev AB. Hydrogen energy: development prospects and materials. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr5014] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Effect of CeO2 Presence on the Electronic Structure and the Activity for Ethanol Oxidation of Carbon Supported Pt. Catalysts 2021. [DOI: 10.3390/catal11050579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Pt/CeO2/C electrocatalysts in different compositions were prepared and their structural characteristics and activities for ethanol oxidation in alkaline media were evaluated. In the presence of CeO2, an increase in the platinum particle size was observed. XANES measurements indicated that the Pt d-band vacancies increased with increasing CeO2 amounts. For the first time, the decrease in electro activity was described to an electronic effect for high CeO2 contents. The dependence of the activity for ethanol oxidation on CeO2 content went to a maximum, due to the counteracting bifunctional and electronic effects of the metal oxide.
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11
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Zhao G, Fang C, Hu J, Zhang D. Platinum-Based Electrocatalysts for Direct Alcohol Fuel Cells: Enhanced Performances toward Alcohol Oxidation Reactions. Chempluschem 2021; 86:574-586. [PMID: 33830678 DOI: 10.1002/cplu.202000811] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 03/20/2021] [Indexed: 12/28/2022]
Abstract
In the past few decades, Pt-based electrocatalysts have attracted great interests due to their high catalytic performances toward the direct alcohol fuel cell (DAFC). However, the high cost, poor stability, and the scarcity of Pt have markedly hindered their large-scale utilization in commerce. Therefore, enhancing the activity and durability of Pt-based electrocatalysts, reducing the Pt amount and thus the cost of DAFC have become the keys for their practical applications. In this minireview, we summarized some basic concepts to evaluate the catalytic performances in electrocatalytic alcohol oxidation reaction (AOR) including electrochemical active surface area, activity and stability, the effective approaches for boosting the catalytic AOR performance involving size decrease, structure and morphology modulation, composition effect, catalyst supports, and assistance under other external energies. Furthermore, we also presented the remaining challenges of the Pt-based electrocatalysts to achieve the fabrication of a real DAFC.
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Affiliation(s)
- Guili Zhao
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, P. R. China
| | - Caihong Fang
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, P. R. China
- Institute of Synthesis and Application of Medical Materials, Wannan Medical College, Wuhu, 241000, P. R. China
| | - Jinwu Hu
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, P. R. China
| | - Deliang Zhang
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, P. R. China
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12
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Wadhwa R, Yadav KK, Goswami T, Guchhait SK, Nishanthi ST, Ghosh HN, Jha M. Mechanistic Insights for Photoelectrochemical Ethanol Oxidation on Black Gold Decorated Monoclinic Zirconia. ACS APPLIED MATERIALS & INTERFACES 2021; 13:9942-9954. [PMID: 33606504 DOI: 10.1021/acsami.0c21010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Surface decoration of metal oxides by metals for enhancing their electrocatalytic properties for organic conversions has attracted a lot of researchers' interest due to their high abundancy, inexpensiveness, and high stability. In the present work, a process for the synthesis of black gold (BG) using a citrate assisted chemical route and m-ZrO2 by a hydrothermal method at 200 °C has been developed. Further, different concentrations of black gold are being used to decorate the surface of zirconia by exploitation of surface potential of zirconia and gold surfaces. The catalyst having 6 mol % concentration of black gold shows excellent electrocatalytic activity for ethanol oxidation with low oxidation peak potential (1.17 V) and high peak current density (8.54 mA cm-2). The current density ratio (jf/jb) is also high (2.54) for this catalyst indicating its high tolerance toward poisoning by intermediate species generated during the catalytic cycle. The enhanced electrocatalytic activity can be attributed to the high tolerance of gold toward CO poisoning and high stability of the ZrO2 support. The black gold decorated zirconia catalyst showed enhanced activity during photoelectrochemical studies when the entire spectrum of light falls on the catalyst. Ultrafast transient studies demonstrated plasmonic excitation of metallic free electrons and subsequent charge separation in the black gold-ZrO2 heterointerface as the key factor for enhanced photoelectrocatalytic activity.
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Affiliation(s)
- Ritika Wadhwa
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
| | - Krishna K Yadav
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
| | - Tanmay Goswami
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
| | - Sujit Kumar Guchhait
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
| | - S T Nishanthi
- Electrochemical Power Sources Division, CSIR-CECRI, Karaikudi 630006, Tamil Nadu, India
| | - Hirendra N Ghosh
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - Menaka Jha
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
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13
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Komorsky-Lovrić Š, Lovrić M. Staircase cyclic voltammetry of electrocatalytic reaction inhibited by the product. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04554-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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15
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Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction. INORGANICS 2020. [DOI: 10.3390/inorganics8110059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Precious metal nanoparticles, in particular palladium nanomaterials, show excellent catalytic properties and are key in the development of energy systems. For instance, ethanol fuel cells are promising devices for sustainable energy conversion, where Pd-based catalysts are key catalysts for the related ethanol oxidation reaction (EOR). Pd is a limited resource; thus, a remaining challenge is the development of efficient and stable Pd-based catalysts. This calls for a deeper understanding of the Pd properties at the nanoscale. This knowledge can be gained in comparative studies of different Pd nanomaterials. However, such studies remain challenging to perform and interpret due to the lack of cross-studies using the same Pd nanomaterials as a reference. Here, as-prepared sub 3 nm diameter surfactant-free Pd nanoparticles supported on carbon are obtained by a simple approach. The as-prepared catalysts with Pd loading 10 and 30 wt % show higher activity and stability compared to commercially available counterparts for the EOR. Upon electrochemical testing, a significant size increase and loss of electrochemical active surface are observed for the as-prepared catalysts, whereas the commercial samples show an increase in the electrochemically active surface area and moderate size increase. This study shines light on the challenging comparison of different catalysts across the literature. Further advancement in Pd (electro)catalyst design will gain from including self-prepared catalysts. The simple synthesis detailed easily leads to suitable nanoparticles to be used as a reference for more systematic comparative studies of Pd catalysts across the literature.
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16
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Deng J, Zhang J, Chen J, Luo Y, Chen Y, Xue Y, Wang G, Wang R. Fabrication of layered porous TiO2/carbon fiber paper decorated by Pt nanoparticles using atomic layer deposition for efficient methanol electro-oxidation. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114468] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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17
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Barroso-Bogeat A, Alexandre-Franco M, Fernández-González C, Gómez-Serrano V. Surface morphological characterization of activated carbon-metal (hydr)oxide composites: some insights into the role of the precursor chemistry in aqueous solution. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2019.1635889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Adrián Barroso-Bogeat
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Universidad de Cádiz, Puerto Real (Cádiz), Spain
- Instituto de Investigación en Microscopía Electrónica y Materiales (IMEYMAT), Universidad de Cádiz, Puerto Real (Cádiz), Spain
| | - María Alexandre-Franco
- Departamento de Química Orgánica e Inorgánica, Universidad de Extremadura, Badajoz, Spain
| | | | - Vicente Gómez-Serrano
- Departamento de Química Orgánica e Inorgánica, Universidad de Extremadura, Badajoz, Spain
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18
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Torres MJ, Sánchez P, de Lucas-Consuegra A, de la Osa AR. Electrocatalytic hydrogenation of cinnamaldehyde in a PEM cell: The role of sodium hydroxide and platinum loading. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110936] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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19
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Almeida C, Galiote N, Eguiluz K, Salazar-Banda G, Del Colle V, Tremiliosi-Filho G. Evidence of surface restructuration on Pt–Rh/C and Pt–Rh–Ni/C nanoparticles applied to ethanol electrooxidation reaction. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136223] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Abstract
Pt/C, PtMOn/C (M = Ni, Sn, Ti, and PtX/C (X = Rh, Ir) catalyst systems were prepared by using the pulse alternating current (PAC) technique. Physical and electrochemical parameters of samples were carried out by x-ray powder diffraction (XRD), transmission electron microscopy (TEM), and CO stripping. The catalytic activity of the synthesized samples for the ethanol electrooxidation reaction (EOR) was investigated. The XRD patterns of the samples showed the presence of diffraction peaks characteristic for Pt, NiO, SnO2, TiO2, Rh, and Ir. The TEM images indicate that the Pt, Rh, and PtIr (alloys) particles had a uniform distribution over the carbon surface in the Pt/C, PtRh/C, PtIr/C, and PtMOn/C (M = Ni, Sn, Ti) catalysts. The electrochemically active surface area of catalysts was determined by the CO-stripping method. The addition of a second element to Pt or the use of hybrid supported catalysts can evidently improve the EOR activity. A remarkable positive affecting shift of the onset potential for the EOR was observed as follows: PtSnO2/C > PtTiO2/C ≈ PtIr/C ≈ PtNiO/C > PtRh/C ≈ Pt/C. The addition of SnO2 to Pt/C catalyst led to the decrease of the onset potential and to significantly facilitate the EOR. The long-term cyclic stability of the synthesized catalysts was investigated. Thereby, the PtSnO2/C catalyst prepared by the PAC technique can be considered as a promising anode catalyst for direct ethanol fuel cells.
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Bucher J, Quinson J, Mingers AM, Zhang D, Arenz M. On the facile and accurate determination of the Pt content in standard carbon supported Pt fuel cell catalysts. Anal Chim Acta 2020; 1101:41-49. [PMID: 32029117 DOI: 10.1016/j.aca.2019.12.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 12/04/2019] [Accepted: 12/05/2019] [Indexed: 11/19/2022]
Abstract
We introduce a new and straight-forward methodology to accurately determine the Pt content in polymer membrane electrolyte fuel cell (PEMFC) catalysts consisting of carbon supported Pt nanoparticles (Pt/C). The method is based on an indirect Pt proof (IPP) consisting of the oxidative removal of the carbon support, the digestion of the Pt in aqua regia followed by a replacement reaction to form Cu ions (CuCl2). The Pt content is then determined via the Cu-ions with the help a complexometric indicator using a simple titration. The procedure is fast and does not require any expensive equipment. Thus, it can be implemented in any standard chemistry laboratory. The advantages and disadvantages of the IPP method are evaluated in a comparison to alternative methods for the determination of the Pt content in supported catalysts, i.e. inductively coupled plasma mass spectrometry (ICP-MS) and UV/Vis spectroscopy (UV/Vis). It is demonstrated that the IPP method delivers reliable and accurate results and is less influenced than for example ICP-MS by side effects such as excess in nitric acid or organic impurities. Furthermore, during the procedure up to 60% of the Pt material is recovered during the IPP procedure.
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Affiliation(s)
- Jan Bucher
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012, Bern, Switzerland
| | - Jonathan Quinson
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen, Denmark
| | - Andrea M Mingers
- Max-Planck-Institut for Iron Research GmbH, Max-Planck-Straße 1, D-40237, Düsseldorf, Germany
| | - Damin Zhang
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012, Bern, Switzerland
| | - Matthias Arenz
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012, Bern, Switzerland.
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22
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Nechitailov AA, Glebova NV, Krasnova AO. Structure Formation Model in the Pt/C-CNT-Nafion System. J STRUCT CHEM+ 2019. [DOI: 10.1134/s0022476619090166] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Kuriganova AB, Faddeev NA, Leontyev IN, Allix M, Rakhmatullin A, Smirnova NV. New Electrochemical Approach for the Synthesis of Pd‐PdO/C Electrocatalyst and Application to Formic Acid Electrooxidation. ChemistrySelect 2019. [DOI: 10.1002/slct.201901628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Alexandra B. Kuriganova
- Platov South-Russian State Polytechnic University (NPI) Prosvescheniya str 132, Novocherkassk 346428 Russia
| | - Nikita A. Faddeev
- Platov South-Russian State Polytechnic University (NPI) Prosvescheniya str 132, Novocherkassk 346428 Russia
| | | | | | | | - Nina V. Smirnova
- Platov South-Russian State Polytechnic University (NPI) Prosvescheniya str 132, Novocherkassk 346428 Russia
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Enhancing Activity of Pd-Based/rGO Catalysts by Al-Si-Na Addition in Ethanol Electrooxidation in Alkaline Medium. J CHEM-NY 2019. [DOI: 10.1155/2019/6842849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The article presents modified Pd-based catalysts supported on reduced graphene oxide (rGO), used in the electrooxidation reaction of ethanol in alkaline medium. When NaBH4 reducing agent was used, the random presence of Na was found out. According to this result, Na was used as a promoter of Pd-based catalyst. Consequently, the Al-Si-Na addition not only assisted active phase Pd nanoparticles to disperse homogenously on graphene surport, but also contributed to increase catalytic activity in the reaction. This value, 16138 mA·mg−1Pd, is about 1.5 times higer than that of the catalyst modified by Al-Si. Moreover, the stability of the catalyst is enhanced more. The electrochemical stability of PASGN.N catalyst was relatively good: after 500 scanning cycles, the current density diminished 32% compared with the highest peak current density of the 15th cycle, which was chosen as a reference. These significant improvement results in electrooxidation of ethanol have opened up the high potential application of these catalysts in direct-ethanol fuel cell.
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Bai J, Liu D, Yang J, Chen Y. Nanocatalysts for Electrocatalytic Oxidation of Ethanol. CHEMSUSCHEM 2019; 12:2117-2132. [PMID: 30834720 DOI: 10.1002/cssc.201803063] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 03/01/2019] [Indexed: 06/09/2023]
Abstract
The use of ethanol as a fuel in direct alcohol fuel cells depends not only on its ease of production from renewable sources, but also on overcoming the challenges of storage and transportation. In an ethanol-based fuel cell, highly active electrocatalysts are required to break the C-C bond in ethanol for its complete oxidation at lower overpotentials, with the aim of increasing the cell performance, ethanol conversion rates, and fuel efficiency. In recent decades, the development of wet-chemistry methods has stimulated research into catalyst design, reactivity tailoring, and mechanistic investigations, and thus, created great opportunities to achieve efficient oxidation of ethanol. In this Minireview, the nanomaterials tested as electrocatalysts for the ethanol oxidation reaction in acid or alkaline environments are summarized. The focus is mainly on nanomaterials synthesized by using wet-chemistry methods, with particular attention on the relationship between the chemical and physical characteristics of the catalysts, for example, catalyst composition, morphology, structure, degree of alloying, presence of oxides or supports, and their activity for ethanol electro-oxidation. As potential alternatives to noble metals, non-noble-metal catalysts for ethanol oxidation are also briefly reviewed. Insights into further enhancing the catalytic performance through the design of efficient electrocatalysts are also provided.
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Affiliation(s)
- Juan Bai
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of, Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, PR China
| | - Danye Liu
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering Address, Chinese Academy of Sciences, Beijing, 100190, PR China
- University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Jun Yang
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering Address, Chinese Academy of Sciences, Beijing, 100190, PR China
- University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Yu Chen
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of, Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, PR China
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Paulo MJ, Venancio RH, Freitas RG, Pereira EC, Tavares AC. Investigation of the electrocatalytic activity for ethanol oxidation of Pt nanoparticles modified with small amount (≤5 wt%) of CeO2. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.04.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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27
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Non-isothermal decomposition of platinum acetylacetonate as a cost-efficient and Size-Controlled Synthesis of Pt/C nanoparticles. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2018.08.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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28
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Kuriganova AB, Leontyev IN, Maslova OA, Smirnova NV. Electrochemically synthesized Pt-based catalysts with different carbon supports for proton exchange membrane fuel cell applications. MENDELEEV COMMUNICATIONS 2018. [DOI: 10.1016/j.mencom.2018.07.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gwebu SS, Nomngongo PN, Maxakato NW. Pt-Sn Nanoparticles Supported on Carbon Nanodots as Anode Catalysts for Alcohol Electro-oxidation in Acidic Conditions. ELECTROANAL 2018. [DOI: 10.1002/elan.201800098] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sandile Surprise Gwebu
- Department of Applied Chemistry; University of Johannesburg, P.O. Box 17011; Doornfontein 2028 South Africa
| | - Philiswa Nosizo Nomngongo
- Department of Applied Chemistry; University of Johannesburg, P.O. Box 17011; Doornfontein 2028 South Africa
| | - Nobanathi Wendy Maxakato
- Department of Applied Chemistry; University of Johannesburg, P.O. Box 17011; Doornfontein 2028 South Africa
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Synergistic effect of nano-Pt and Ni spine for HER in alkaline solution: hydrogen spillover from nano-Pt to Ni spine. Sci Rep 2018; 8:2986. [PMID: 29445208 PMCID: PMC5813055 DOI: 10.1038/s41598-018-21396-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 01/31/2018] [Indexed: 11/08/2022] Open
Abstract
The design of active, stable, and cost-effective electrocatalysts for the H2 evolution reaction (HER) in alkaline conditions is important for electrochemical systems such as the chloro-alkaline process and H2 production. Here we report catalysts comprising Pt on Ni single crystalline spines (Pt/Ni-SP) with high activity and stability for HER in alkaline solution with proposed mechanism. The Pt/Ni-SP catalysts are prepared by dispersing platinum nanoparticles (1.7-3.1 nm) on the single-crystalline spines (Ni-SP) of Ni urchin-like particles. The size and coverage of Pt nanoparticles on Ni-SP are increased with increases in the Pt loading amount. X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy are performed to observe the structure of the Pt/Ni-SP catalyst. The catalysts achieve the mass activity of 1.11 A mg-1(Pt), comparing favorably to Pt/C catalysts with the mass activity of 0.33 A mg-1(Pt) at 0.05 V overpotential. The Tafel slope of the Pt/Ni-SP catalyst is approximately 30 mV dec-1, similar to that of Pt, while Pt/Ni-SP is very stable in alkaline solution, like Ni. The synergistic effect of Pt/Ni-SP is ascribed to H spillover from Pt to Ni.
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31
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G. Verga L, Russell AE, Skylaris CK. Ethanol, O, and CO adsorption on Pt nanoparticles: effects of nanoparticle size and graphene support. Phys Chem Chem Phys 2018; 20:25918-25930. [DOI: 10.1039/c8cp04798g] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT calculations reveal aspects of size and support effects for Pt nanoparticles on graphene interacting with O, CO and ethanol.
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Affiliation(s)
- L. G. Verga
- Department of Chemistry, University of Southampton
- Highfield
- UK
| | - A. E. Russell
- Department of Chemistry, University of Southampton
- Highfield
- UK
| | - C.-K. Skylaris
- Department of Chemistry, University of Southampton
- Highfield
- UK
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32
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Zhu C, Fu S, Shi Q, Du D, Lin Y. Single-Atom Electrocatalysts. Angew Chem Int Ed Engl 2017; 56:13944-13960. [DOI: 10.1002/anie.201703864] [Citation(s) in RCA: 816] [Impact Index Per Article: 116.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Chengzhou Zhu
- School of Mechanical and Materials Engineering; Washington State University; Pullman WA 99164 USA
| | - Shaofang Fu
- School of Mechanical and Materials Engineering; Washington State University; Pullman WA 99164 USA
| | - Qiurong Shi
- School of Mechanical and Materials Engineering; Washington State University; Pullman WA 99164 USA
| | - Dan Du
- School of Mechanical and Materials Engineering; Washington State University; Pullman WA 99164 USA
- Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry; Central China Normal University; Wuhan 430079 P. R. China
| | - Yuehe Lin
- School of Mechanical and Materials Engineering; Washington State University; Pullman WA 99164 USA
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33
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Affiliation(s)
- Chengzhou Zhu
- School of Mechanical and Materials Engineering; Washington State University; Pullman WA 99164 USA
| | - Shaofang Fu
- School of Mechanical and Materials Engineering; Washington State University; Pullman WA 99164 USA
| | - Qiurong Shi
- School of Mechanical and Materials Engineering; Washington State University; Pullman WA 99164 USA
| | - Dan Du
- School of Mechanical and Materials Engineering; Washington State University; Pullman WA 99164 USA
- Key Laboratory of Pesticides and Chemical Biology; Ministry of Education, College of Chemistry, Central China Normal University; Wuhan 430079 P. R. China
| | - Yuehe Lin
- School of Mechanical and Materials Engineering; Washington State University; Pullman WA 99164 USA
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34
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Highly active platinum nanoparticles supported by nitrogen/sulfur functionalized graphene composite for ethanol electro-oxidation. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.05.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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Impact of the atmosphere composition in the process of synthesis on the morphology and electrochemical performance of Pt/C electrocatalysts. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-017-3581-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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36
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Muthukumar V, Chetty R. Morphological transformation of electrodeposited Pt and its electrocatalytic activity towards direct formic acid fuel cells. J APPL ELECTROCHEM 2017. [DOI: 10.1007/s10800-017-1076-z] [Citation(s) in RCA: 10] [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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37
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Simple synthesis of Pt-Ag/SnO2-C for use as a catalyst of methanol oxidation in alkaline media. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-017-3567-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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38
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Krishnamurthy G, Shivakumar MS. Electroless deposition of nanosized nickel over graphite substrate with better coating coverage and catalytic activity for fuel cell application. J APPL ELECTROCHEM 2017. [DOI: 10.1007/s10800-017-1043-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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39
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Corradini PG, Santos NA, Silva GC, Perez J. Pt–rare earth catalysts for ethanol electrooxidation: modification of polyol synthesis. J Solid State Electrochem 2016. [DOI: 10.1007/s10008-016-3296-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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40
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Liu S, Tian N, Xie AY, Du JH, Xiao J, Liu L, Sun HY, Cheng ZY, Zhou ZY, Sun SG. Electrochemically Seed-Mediated Synthesis of Sub-10 nm Tetrahexahedral Pt Nanocrystals Supported on Graphene with Improved Catalytic Performance. J Am Chem Soc 2016; 138:5753-6. [DOI: 10.1021/jacs.5b13473] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shuo Liu
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, Department of
Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Na Tian
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, Department of
Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Ai-Yun Xie
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, Department of
Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jia-Huan Du
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, Department of
Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jing Xiao
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, Department of
Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Li Liu
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, Department of
Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Hong-Yu Sun
- National
Center for Electron Microscopy in Beijing, School of Materials Science
and Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Zhi-Ying Cheng
- National
Center for Electron Microscopy in Beijing, School of Materials Science
and Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Zhi-You Zhou
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, Department of
Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Shi-Gang Sun
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative
Innovation Center of Chemistry for Energy Materials, Department of
Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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41
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Bach Delpeuch A, Jacquot M, Chatenet M, Cremers C. The influence of mass-transport conditions on the ethanol oxidation reaction (EOR) mechanism of Pt/C electrocatalysts. Phys Chem Chem Phys 2016; 18:25169-25175. [DOI: 10.1039/c6cp04294e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study aims to provide further understanding of the influence of different parameters that control mass-transport (the revolution rate of the rotating disk electrode and the potential scan rate) on the ethanol oxidation reaction (EOR).
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Affiliation(s)
- Antoine Bach Delpeuch
- Fraunhofer Institut für Chemische Technologie ICT
- 76327 Pfinztal
- Germany
- Univ. Grenoble Alpes
- LEPMI
| | - Marjorie Jacquot
- Fraunhofer Institut für Chemische Technologie ICT
- 76327 Pfinztal
- Germany
- Univ. Grenoble Alpes
- LEPMI
| | | | - Carsten Cremers
- Fraunhofer Institut für Chemische Technologie ICT
- 76327 Pfinztal
- Germany
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42
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Verga LG, Aarons J, Sarwar M, Thompsett D, Russell AE, Skylaris CK. Effect of graphene support on large Pt nanoparticles. Phys Chem Chem Phys 2016; 18:32713-32722. [DOI: 10.1039/c6cp07334d] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Large scale DFT calculations of Pt nanoparticles supported on graphene explore the non-trivial interplay of size and support effects.
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Affiliation(s)
- L. G. Verga
- Department of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
| | - J. Aarons
- Department of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
| | - M. Sarwar
- Johnson Matthey Technology Centre
- Blounts Court
- Reading
- UK
| | - D. Thompsett
- Johnson Matthey Technology Centre
- Blounts Court
- Reading
- UK
| | - A. E. Russell
- Department of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
| | - C.-K. Skylaris
- Department of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
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43
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Bach Delpeuch A, Chatenet M, Rau MS, Cremers C. Influence of H- and OH-adsorbates on the ethanol oxidation reaction--a DEMS study. Phys Chem Chem Phys 2015; 17:10881-93. [PMID: 25820025 DOI: 10.1039/c5cp00132c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ethanol oxidation reaction (EOR) was investigated by potentiodynamic techniques on Pt/C, Rh/C, Pt-Rh/C, Pt-SnO2/C and Pt-Rh-SnO2/C by differential electrochemical mass spectrometry (DEMS) in a flow cell system. Prior to the cyclic voltammetries, adsorption of H- and OH-species was carried out by chronoamperometry at Ead = 0.05 and 1 V vs. RHE, respectively, in order to examine their influence on the EOR on the different electrocatalysts. For the sake of comparison, another adsorption potential was chosen at Ead = 0.3 V vs. RHE, in the double layer region (i.e. in the absence of such adsorbates). For this study, 20 wt% electrocatalysts were synthesized using a modified polyol method and were physically characterized by inductively coupled plasma atomic emission spectrometry (ICP-AES), X-ray diffraction (XRD) and transmission electron microscopy (TEM). When comparing the first and second cycles of the cyclic voltammograms (CVs) on Pt/C and Pt-SnO2/C, the presence of Had on the electrocatalyst surface seems to hinder the initiation of the ethanol electrooxidation, whereas the reaction onset potential is shifted negatively with the presence of OH-adsorbates. In contrast to them, the EOR on Rh/C is enhanced when the electrocatalyst surface is covered with Had and is inhibited after adsorption at Ead = 0.3 and 1 V vs. RHE. Finally, on Pt-Rh/C and Pt-Rh-SnO2/C, neither the H- nor OH-adsorbates do impact the EOR initiation. The lowest EOR onset was recorded on Pt-SnO2/C and Pt-Rh-SnO2/C electrocatalysts. The CO2 currency efficiency (CCE) was also determined for each electrocatalyst and demonstrated higher values on Pt-Rh-SnO2/C.
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Affiliation(s)
- Antoine Bach Delpeuch
- Fraunhofer Institute for Chemical Technology ICT, Joseph-von-Fraunhofer-Straße 7, 76327 Pfinztal, Germany.
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Sun CL, Tang JS, Brazeau N, Wu JJ, Ntais S, Yin CW, Chou HL, Baranova EA. Particle size effects of sulfonated graphene supported Pt nanoparticles on ethanol electrooxidation. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.12.099] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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45
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Yürüm A, Gürsel SA, Okan BS, Taralp A, Bakan F, Letofsky-Papst I, Yürüm Y. Size and Dispersion Control of Pt Nanoparticles Grown Upon Graphite-Derived Nanosheets. CHEM ENG COMMUN 2014. [DOI: 10.1080/00986445.2014.968714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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46
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Gomes J, Profeti D, Deiner LJ. Influence of the Particle Size Distribution on the Activity and Selectivity of Carbon-Supported Platinum Nanoparticle Catalysts for Ethanol Electrooxidation. ChemElectroChem 2013. [DOI: 10.1002/celc.201300060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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47
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Friedl J, Stimming U. Model catalyst studies on hydrogen and ethanol oxidation for fuel cells. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.12.130] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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48
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Antolini E. Effect of the structural characteristics of binary Pt-Ru and ternary Pt-Ru-M fuel cell catalysts on the activity of ethanol electrooxidation in acid medium. CHEMSUSCHEM 2013; 6:966-973. [PMID: 23650220 DOI: 10.1002/cssc.201300138] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Indexed: 06/02/2023]
Abstract
In view of their possible use as anode materials in acid direct ethanol fuel cells, the electrocatalytic activity of Pt-Ru and Pt-Ru-M catalysts for ethanol oxidation has been investigated. This minireview examines the effects of the structural characteristics of Pt-Ru, such as the degree of alloying and Ru oxidation state, on the electrocatalytic activity for ethanol oxidation.
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Affiliation(s)
- Ermete Antolini
- Scuola di Scienza dei Materiali, Via 25 aprile 22, 16016 Cogoleto, Genova, Italy
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49
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Nepel TC, Lopes PP, Paganin VA, Ticianelli EA. CO tolerance of proton exchange membrane fuel cells with Pt/C and PtMo/C anodes operating at high temperatures: A mass spectrometry investigation. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.10.039] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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50
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