201
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In situ FTIR spectroscopic study of ethanol oxidation on Pt(111)/Rh/Sn surface. The anion effect. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2014.12.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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202
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Zhu W, Ke J, Wang SB, Ren J, Wang HH, Zhou ZY, Si R, Zhang YW, Yan CH. Shaping Single-Crystalline Trimetallic Pt–Pd–Rh Nanocrystals toward High-Efficiency C–C Splitting of Ethanol in Conversion to CO2. ACS Catal 2015. [DOI: 10.1021/cs5018419] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Wei Zhu
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory
in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
| | - Jun Ke
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory
in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
| | - Si-Bo Wang
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory
in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
| | - Jie Ren
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Department
of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Hong-Hui Wang
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Department
of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhi-You Zhou
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Department
of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Rui Si
- Shanghai
Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
| | - Ya-Wen Zhang
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory
in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
| | - Chun-Hua Yan
- Beijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory
in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, China
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203
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Erini N, Rudi S, Beermann V, Krause P, Yang R, Huang Y, Strasser P. Exceptional Activity of a Pt-Rh-Ni Ternary Nanostructured Catalyst for the Electrochemical Oxidation of Ethanol. ChemElectroChem 2015. [DOI: 10.1002/celc.201402390] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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204
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Improved catalysis of room temperature synthesized Pd-Cu alloy nanoparticles for anodic oxidation of ethanol in alkaline media. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.12.054] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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205
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Dutta A, Ouyang J. Ternary NiAuPt Nanoparticles on Reduced Graphene Oxide as Catalysts toward the Electrochemical Oxidation Reaction of Ethanol. ACS Catal 2015. [DOI: 10.1021/cs501365y] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Abhijit Dutta
- Department of Materials Science
and Engineering, National University of Singapore, 7 Engineering
Drive 1, 117576 Singapore
| | - Jianyong Ouyang
- Department of Materials Science
and Engineering, National University of Singapore, 7 Engineering
Drive 1, 117576 Singapore
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206
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Liu C, Liu P. Mechanistic Study of Methanol Synthesis from CO2 and H2 on a Modified Model Mo6S8 Cluster. ACS Catal 2015. [DOI: 10.1021/cs501354b] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Cheng Liu
- Mechanical
Engineering College, Yangzhou University, 196 Huayang West Road, Yangzhou, Jiangsu 225127, P. R. China
| | - Ping Liu
- Chemistry Department,
Brookhaven National Laboratory, Upton, New York 11973, United States
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207
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Wu P, Huang Y, Zhou L, Wang Y, Bu Y, Yao J. Nitrogen-doped graphene supported highly dispersed palladium-lead nanoparticles for synergetic enhancement of ethanol electrooxidation in alkaline medium. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.11.110] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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208
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Suematsu K, Ma N, Yuasa M, Kida T, Shimanoe K. Surface-modification of SnO2 nanoparticles by incorporation of Al for the detection of combustible gases in a humid atmosphere. RSC Adv 2015. [DOI: 10.1039/c5ra17556a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aluminium-doped SnO2 nanoparticles inhibited hydroxyl poisoning and enhanced the sensor response in a humid atmosphere.
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Affiliation(s)
- Koichi Suematsu
- Department of Energy and Material Sciences
- Faculty of Engineering Science
- Kyushu University
- Kasuga
- Japan
| | - Nan Ma
- Department of Molecular and Material Science
- Interdisciplinary Graduate School of Engineering Science
- Kyushu University
- Kasuga
- Japan
| | - Masayoshi Yuasa
- Department of Energy and Material Sciences
- Faculty of Engineering Science
- Kyushu University
- Kasuga
- Japan
| | - Tetsuya Kida
- Department of Applied Chemistry and Biochemistry
- Kumamoto University
- Kumamoto
- Japan
| | - Kengo Shimanoe
- Department of Energy and Material Sciences
- Faculty of Engineering Science
- Kyushu University
- Kasuga
- Japan
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209
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von Weber A, Baxter ET, Proch S, Kane MD, Rosenfelder M, White HS, Anderson SL. Size-dependent electronic structure controls activity for ethanol electro-oxidation at Ptn/indium tin oxide (n = 1 to 14). Phys Chem Chem Phys 2015; 17:17601-10. [DOI: 10.1039/c5cp01824b] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Activity of small Ptn clusters on ITO is strongly dependent on cluster size, and anti-correlated with the Pt 4d core level binding energy, demonstrating that electron-rich Pt clusters are required for high activity.
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Affiliation(s)
| | - Eric T. Baxter
- Department of Chemistry
- University of Utah
- Salt Lake City
- USA
| | | | | | | | - Henry S. White
- Department of Chemistry
- University of Utah
- Salt Lake City
- USA
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210
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Oxidation of isotopically-labeled ethanol on platinum–tin–rhodium surfaces: Enhancing the production of CO2 from methyl groups. Electrochem commun 2014. [DOI: 10.1016/j.elecom.2014.09.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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211
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Leelavathi A, Madras G, Ravishankar N. New insights into electronic and geometric effects in the enhanced photoelectrooxidation of ethanol Using ZnO nanorod/ultrathin Au nanowire hybrids. J Am Chem Soc 2014; 136:14445-55. [PMID: 25244319 DOI: 10.1021/ja5059444] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Oxidation of small organic molecules in a fuel cell is a viable method for energy production. However, the key issue is the development of suitable catalysts that exhibit high efficiencies and remain stable during operation. Here, we demonstrate that amine-modified ZnO nanorods on which ultrathin Au nanowires are grown act as an excellent catalyst for the oxidation of ethanol. We show that the modification of the ZnO nanorods with oleylamine not only modifies the electronic structure favorably but also serves to anchor the Au nanowires on the nanorods. The adsorption of OH(-) species on the Au nanowires that is essential for ethanol oxidation is facilitated at much lower potentials as compared to bare Au nanowires leading to high activity. While ZnO shows negligible electrocatalytic activity under normal conditions, there is significant enhancement in the activity under light irradiation. We demonstrate a synergistic enhancement in the photoelectrocatalytic activity of the ZnO/Au nanowire hybrid and provide mechanistic explanation for this enhancement based on both electronic as well as geometric effects. The principles developed are applicable for tuning the properties of other metal/semiconductor hybrids with potentially interesting applications beyond the fuel cell application demonstrated here.
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Affiliation(s)
- Annamalai Leelavathi
- Centre for Nanoscience and Engineering, ‡Department of Chemical Engineering, and §Materials Research Centre, Indian Institute of Science , Bangalore-560012, India
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212
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Shen Y, Zhang MZ, Xiao K, Xi J. Synthesis of Pt, PtRh, and PtRhNi Alloys Supported by Pristine Graphene Nanosheets for Ethanol Electrooxidation. ChemCatChem 2014. [DOI: 10.1002/cctc.201402629] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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213
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Jin B, Sun H, Huang M, Zhao L. Ethanol Electro-oxidation on Novel Electrocatalyst PtVSnO 2 /C in Acidic Media. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.07.099] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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214
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Ramesh GV, Kodiyath R, Tanabe T, Manikandan M, Fujita T, Umezawa N, Ueda S, Ishihara S, Ariga K, Abe H. Stimulation of electro-oxidation catalysis by bulk-structural transformation in intermetallic ZrPt₃ nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2014; 6:16124-16130. [PMID: 25184479 DOI: 10.1021/am504147q] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Although compositional tuning of metal nanoparticles (NPs) has been extensively investigated, possible control of the catalytic performance through bulk-structure tuning is surprisingly overlooked. Here we report that the bulk structure of intermetallic ZrPt3 NPs can be engineered by controlled annealing and their catalytic performance is significantly enhanced as the result of bulk-structural transformation. Chemical reduction of organometallic precursors yielded the desired ZrPt3 NPs with a cubic FCC-type structure (c-ZrPt3 NPs). The c-ZrPt3 NPs were then transformed to a different phase of ZrPt3 with a hexagonal structure (h-ZrPt3 NPs) by annealing at temperatures between 900 and 1000 °C. The h-ZrPt3 NPs exhibited higher catalytic activity and long-term stability than either the c-ZrPt3 NPs or commercial Pt/C NPs toward the electro-oxidation of ethanol. Theoretical calculations have elucidated that the enhanced activity of the h-ZrPt3 NPs is attributed to the increased surface energy, whereas the stability of the catalyst is retained by the lowered bulk-free-energy.
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Affiliation(s)
- Gubbala V Ramesh
- National Institute for Materials Science , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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215
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Bedolla PO, Feldbauer G, Wolloch M, Gruber C, Eder S, Dörr N, Mohn P, Redinger J, Vernes A. Density Functional Investigation of the Adsorption of Isooctane, Ethanol, and Acetic Acid on a Water-Covered Fe(100) Surface. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2014; 118:21428-21437. [PMID: 25243045 PMCID: PMC4166681 DOI: 10.1021/jp504695m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 07/31/2014] [Indexed: 05/14/2023]
Abstract
The presence of water in biofuels poses the question of how it affects the frictional performance of additives in fuels containing organic substances. To investigate the effect of water on the adsorption of molecules present in fuel and its additives we simulated within the framework of density functional theory the adsorption of ethanol, isooctane (2,2,4-trimethylpentane), and acetic acid on a bare and a water-covered Fe(100) surface. Van der Waals interactions are taken into account in our computations. In those molecules, where dispersion forces contribute significantly to the binding mechanism, the water layer has a stronger screening effect. Additionally, this effect can be enhanced by the presence of polar functional groups in the molecule. Thus, with the introduction of a water layer, the adsorption energy of isooctane and ethanol is reduced but it is increased in the case of the acetic acid. The adsorption configuration of ethanol is changed, while the one of acetic acid is moderately, and for isooctane only very slightly altered. Therefore, the effect of a water layer in the adsorption of organic molecules on an Fe(100) surface strongly depends on the type of bond and consequently, so do the tribological properties.
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Affiliation(s)
- Pedro O. Bedolla
- Institute
of Applied Physics, Vienna University of
Technology, Wiedner Hauptstrasse
8-10/134, 1040 Vienna, Austria
- Austrian Center of Competence for Tribology, Viktor-Kaplan-Strasse 2, 2700 Wiener Neustadt, Austria
| | - Gregor Feldbauer
- Institute
of Applied Physics, Vienna University of
Technology, Wiedner Hauptstrasse
8-10/134, 1040 Vienna, Austria
- Austrian Center of Competence for Tribology, Viktor-Kaplan-Strasse 2, 2700 Wiener Neustadt, Austria
| | - Michael Wolloch
- Institute
of Applied Physics, Vienna University of
Technology, Wiedner Hauptstrasse
8-10/134, 1040 Vienna, Austria
- Austrian Center of Competence for Tribology, Viktor-Kaplan-Strasse 2, 2700 Wiener Neustadt, Austria
| | - Christoph Gruber
- Institute
of Applied Physics, Vienna University of
Technology, Wiedner Hauptstrasse
8-10/134, 1040 Vienna, Austria
| | - Stefan
J. Eder
- Austrian Center of Competence for Tribology, Viktor-Kaplan-Strasse 2, 2700 Wiener Neustadt, Austria
| | - Nicole Dörr
- Austrian Center of Competence for Tribology, Viktor-Kaplan-Strasse 2, 2700 Wiener Neustadt, Austria
| | - Peter Mohn
- Institute
of Applied Physics, Vienna University of
Technology, Wiedner Hauptstrasse
8-10/134, 1040 Vienna, Austria
| | - Josef Redinger
- Institute
of Applied Physics, Vienna University of
Technology, Wiedner Hauptstrasse
8-10/134, 1040 Vienna, Austria
| | - András Vernes
- Institute
of Applied Physics, Vienna University of
Technology, Wiedner Hauptstrasse
8-10/134, 1040 Vienna, Austria
- Austrian Center of Competence for Tribology, Viktor-Kaplan-Strasse 2, 2700 Wiener Neustadt, Austria
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216
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Narayanamoorthy B, Datta KKR, Eswaramoorthy M, Balaji S. Highly Active and Stable Pt3Rh Nanoclusters as Supportless Electrocatalyst for Methanol Oxidation in Direct Methanol Fuel Cells. ACS Catal 2014. [DOI: 10.1021/cs500628m] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Bhuvanendran Narayanamoorthy
- Department
of Chemistry, Faculty of Science, Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya (SCSVMV University), Enathur, Kanchipuram 631 561, India
| | - Kasibhatta Kumara Ramanatha Datta
- Regional
Centre of Advanced Technologies and Materials, Faculty of Science,
Department of Physical Chemistry, Palacky University, 771 46 Olomouc, Czech Republic
| | - Muthusamy Eswaramoorthy
- Nanomaterials
and Catalysis Lab, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bangalore 560 064, India
| | - Subramanian Balaji
- Department
of Chemistry, Faculty of Science, Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya (SCSVMV University), Enathur, Kanchipuram 631 561, India
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217
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Shan S, Luo J, Wu J, Kang N, Zhao W, Cronk H, Zhao Y, Joseph P, Petkov V, Zhong CJ. Nanoalloy catalysts for electrochemical energy conversion and storage reactions. RSC Adv 2014. [DOI: 10.1039/c4ra05943c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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218
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Martinez U, Serov A, Padilla M, Atanassov P. Mechanistic insight into oxide-promoted palladium catalysts for the electro-oxidation of ethanol. CHEMSUSCHEM 2014; 7:2351-2357. [PMID: 24984856 DOI: 10.1002/cssc.201402062] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 04/03/2014] [Indexed: 06/03/2023]
Abstract
Recent advancements in the development of alternatives to proton exchange membrane fuel cells utilizing less-expensive catalysts and renewable liquid fuels, such as alcohols, has been observed for alkaline fuel cell systems. Alcohol fuels present the advantage of not facing the challenge of storage and transportation encountered with hydrogen fuel. Oxidation of alcohols has been improved by the promotion of alloyed or secondary phases. Nevertheless, currently, there is no experimental understanding of the difference between an intrinsic and a synergistic promotion effect in high-pH environments. This report shows evidence of different types of promotion effects on palladium electrocatalysts obtained from the presence of an oxide phase for the oxidation of ethanol. The correlation of mechanistic in situ IR spectroscopic studies with electrochemical voltammetry studies on two similar electrocatalytic systems allow the role of either an alloyed or a secondary phase on the mechanism of oxidation of ethanol to be elucidated. Evidence is presented for the difference between an intrinsic effect obtained from an alloyed system and a synergistic effect produced by the presence of an oxide phase.
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Affiliation(s)
- Ulises Martinez
- Center for Emerging Energy Technologies, The University of New Mexico, 1 University of New Mexico-MSC01 1120, Albuquerque, NM 87131 (USA); Present Address: Materials Physics and Applications, Los Alamos National Laboratory, Los Alamos, NM 87545 (USA)
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219
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Du W, Yang G, Wong E, Deskins NA, Frenkel AI, Su D, Teng X. Platinum-Tin Oxide Core–Shell Catalysts for Efficient Electro-Oxidation of Ethanol. J Am Chem Soc 2014; 136:10862-5. [DOI: 10.1021/ja505456w] [Citation(s) in RCA: 159] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Wenxin Du
- Department
of Chemical Engineering, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - Guangxing Yang
- Department
of Chemical Engineering, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - Emily Wong
- Department
of Chemical Engineering, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - N. Aaron Deskins
- Department
of Chemical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, United States
| | - Anatoly I. Frenkel
- Department
of Physics, Yeshiva University, New York, New York 10016, United States
| | - Dong Su
- Center
for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Xiaowei Teng
- Department
of Chemical Engineering, University of New Hampshire, Durham, New Hampshire 03824, United States
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220
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Huang H, Liu Y, Gao Q, Ruan W, Lin X, Li X. Rational construction of strongly coupled metal-metal oxide-graphene nanostructure with excellent electrocatalytic activity and durability. ACS APPLIED MATERIALS & INTERFACES 2014; 6:10258-64. [PMID: 24919010 DOI: 10.1021/am5016606] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The interaction within heterogeneous nanostructures can provide a great opportunity to radically enhance their electrocatalytic properties and increase their activity and durability. Here a rational, simple, and integrated strategy is reported to construct uniform and strongly coupled metal-metal oxide-graphene nanostructure as an electrocatalyst with high performance. We first simply synthesized the interacted SnO2-prGO (protected and reduced graphene oxide) hybrid with SnO2 nanoparticles (∼4 nm) selectively anchored on the oxygenated defects of rGO using an in situ redox and hydrolysis reaction. After the deposition of Pt, uniform Pt NPs are found to contact intimately and exclusively with the SnO2 phase in the SnO2-prGO hybrid. This constructed nanostructure (Pt-SnO2-prGO) exhibits significantly improved electrocatalytic activity (2.19-fold) and durability (2.08-fold) toward methanol oxidation over that of the state-of-the-art Pt/C catalyst. The detailed explanation of the strong coupling between SnO2 and graphene as well as between Pt and SnO2 is discussed, revealing that such a process can be used to immobilize various metal catalysts on metal-oxide-decorated catalysts for realizing advanced catalytic systems with enhanced performance.
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Affiliation(s)
- Haoliang Huang
- Institute of Biomaterials, Department of Applied Chemistry, College of Sciences, South China Agricultural University , Guangzhou 510642, China
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221
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Alia SM, Duong K, Liu T, Jensen K, Yan Y. Palladium and gold nanotubes as oxygen reduction reaction and alcohol oxidation reaction catalysts in base. CHEMSUSCHEM 2014; 7:1739-1744. [PMID: 24757078 DOI: 10.1002/cssc.201400129] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Indexed: 06/03/2023]
Abstract
Palladium (PdNTs) and gold nanotubes (AuNTs) were synthesized by the galvanic displacement of silver nanowires. PdNTs and AuNTs have wall thicknesses of 6 nm, outer diameters of 60 nm, and lengths of 5-10 and 5-20 μm, respectively. Rotating disk electrode experiments showed that the PdNTs and AuNTs have higher area normalized activities for the oxygen reduction reaction (ORR) than conventional nanoparticle catalysts. The PdNTs produced an ORR area activity that was 3.4, 2.2, and 3.7 times greater than that on carbon-supported palladium nanoparticles (Pd/C), bulk polycrystalline palladium, and carbon-supported platinum nanoparticles (Pt/C), respectively. The AuNTs produced an ORR area activity that was 2.3, 9.0, and 2.0 times greater than that on carbon-supported gold nanoparticles (Au/C), bulk polycrystalline gold, and Pt/C, respectively. The PdNTs also had lower onset potentials than Pd/C and Pt/C for the oxidation of methanol (0.236 V), ethanol (0.215 V), and ethylene glycol (0.251 V). In comparison to Pt/C, the PdNTs and AuNTs further demonstrated improved alcohol tolerance during the ORR.
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Affiliation(s)
- Shaun M Alia
- Department of Chemical Engineering, University of Delaware, Newark, DE 19716 (USA), Fax: (+1) 302-831-1048; Department of Chemical and Environmental Engineering, University of California, Riverside, Riverside, CA 92521 (USA)
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222
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Murawska M, Cox JA, Miecznikowski K. PtIr-WO 3 nanostructured alloy for electrocatalytic oxidation of ethylene glycol and ethanol. J Solid State Electrochem 2014; 18:3003-3010. [PMID: 25360067 PMCID: PMC4207626 DOI: 10.1007/s10008-014-2493-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 04/25/2014] [Accepted: 04/27/2014] [Indexed: 12/01/2022]
Abstract
In this article, we characterized tungsten oxide-decorated carbon-supported PtIr nanoparticles and tested it for the electrooxidation reactions of ethylene glycol and ethanol. Phase and morphological evaluation of the proposed electrocatalytic materials are investigated employing various characterization techniques including X-ray diffraction (XRD) and transmission electron microscopy (TEM). Electrochemical diagnostic measurements such as cyclic voltammetry, chronoamperometry, and linear sweep voltammetry revealed that the tungsten oxide-modified PtIr/Vulcan nanoparticles have higher catalytic activity for ethylene glycol and ethanol electrooxidation than that of PtIr/Vulcan. A significant enhancement for electrooxidation of CO-adsorbate monolayers occurred in the presence of a transition metal oxide relative to that of pure PtIr/Vulcan electrocatalyst. The likely reasons for this are modification on the Pt center electronic structure and/or increasing the population of reactive oxo groups at the PtIr/Vulcan electrocatalytic interface in different potential regions.
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Affiliation(s)
- Magdalena Murawska
- Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warsaw, Poland
| | - James A. Cox
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056 USA
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223
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Erini N, Loukrakpam R, Petkov V, Baranova EA, Yang R, Teschner D, Huang Y, Brankovic SR, Strasser P. Ethanol Electro-Oxidation on Ternary Platinum–Rhodium–Tin Nanocatalysts: Insights in the Atomic 3D Structure of the Active Catalytic Phase. ACS Catal 2014. [DOI: 10.1021/cs500147p] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nina Erini
- Department of Chemistry, Chemical
Engineering Division, Technical University Berlin, 10623 Berlin, Germany
| | - Rameshwori Loukrakpam
- Department of Chemistry, Chemical
Engineering Division, Technical University Berlin, 10623 Berlin, Germany
| | - Valeri Petkov
- Department
of Physics, Central Michigan University, 1200 South Franklin Street, Mt. Pleasant, Michigan 48859, United States
| | - Elena A. Baranova
- Department of Chemical and
Biological Engineering, Centre
for Catalysis Research and Innovation (CCRI), University of Ottawa, 161 Louis Pasteur, Ottawa, ON K1N6N5, Canada
| | - Ruizhi Yang
- School of Energy, Soochow University, No. 1 Shizi Street, Suzhou, Jiangsu 215006, China
| | - Detre Teschner
- Department
of Inorganic Chemistry, Fritz-Haber-Institute of the Max Planck Society, Faradayweg 4−6, 14195 Berlin, Germany
| | - Yunhui Huang
- School of Materials
Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, China
| | - Stanko R. Brankovic
- Department
of Electrical and Computer Engineering, University of Houston, N308 Engineering Building 1, Houston, Texas 77204, United States
| | - Peter Strasser
- Department of Chemistry, Chemical
Engineering Division, Technical University Berlin, 10623 Berlin, Germany
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224
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Baglio V, Sebastián D, D’Urso C, Stassi A, Amin R, El-Khatib K, Aricò A. Composite anode electrode based on iridium oxide promoter for direct methanol fuel cells. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.10.141] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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225
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Hoque MA, Higgins DC, Hassan FM, Choi JY, Pritzker MD, Chen Z. Tin oxide - mesoporous carbon composites as platinum catalyst supports for ethanol oxidation and oxygen reduction. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.12.075] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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226
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Yang YY, Ren J, Li QX, Zhou ZY, Sun SG, Cai WB. Electrocatalysis of Ethanol on a Pd Electrode in Alkaline Media: An in Situ Attenuated Total Reflection Surface-Enhanced Infrared Absorption Spectroscopy Study. ACS Catal 2014. [DOI: 10.1021/cs401198t] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yao-Yue Yang
- Shanghai
Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative
Innovation Center for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Jie Ren
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Department
of Chemistry, College of Chemistry and Chemical Engineering, School
of Energy Research, Xiamen University, Xiamen 361005, China
| | - Qiao-Xia Li
- College
of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Zhi-You Zhou
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Department
of Chemistry, College of Chemistry and Chemical Engineering, School
of Energy Research, Xiamen University, Xiamen 361005, China
| | - Shi-Gang Sun
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Department
of Chemistry, College of Chemistry and Chemical Engineering, School
of Energy Research, Xiamen University, Xiamen 361005, China
| | - Wen-Bin Cai
- Shanghai
Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative
Innovation Center for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
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227
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Parlinska-Wojtan M, Sowa R, Pokora M, Martyła A, Lee KS, Kowal A. Structural investigation of SnO2
catalytic nanoparticles doped with F and Sb. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5384] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Roman Sowa
- Center for Innovation and Technology Transfer; University of Rzeszow; Poland
| | - Monika Pokora
- Central Laboratory of Batteries and Cells; Institute of Non-ferrous Metals; Poznan Poland
| | - Agnieszka Martyła
- Central Laboratory of Batteries and Cells; Institute of Non-ferrous Metals; Poznan Poland
| | | | - Andrzej Kowal
- Central Laboratory of Batteries and Cells; Institute of Non-ferrous Metals; Poznan Poland
- Center for Synthesis and Characterization of Nanomaterials; University of East Sarajevo; Sarajevo Bosnia and Herzegovina
- Institute of Power Engineering - Research Institute; Ceramic Branch; Boguchwala Poland
- Center for Microelectronics and Nanotechnology; University of Rzeszow; Rzeszow Poland
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228
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Zhang N, Zhang S, Du C, Wang Z, Shao Y, Kong F, Lin Y, Yin G. Pt/Tin Oxide/Carbon Nanocomposites as Promising Oxygen Reduction Electrocatalyst with Improved Stability and Activity. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.11.139] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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229
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Jin JM, Sheng T, Lin X, Kavanagh R, Hamer P, Hu P, Hardacre C, Martinez-Bonastre A, Sharman J, Thompsett D, Lin WF. The origin of high activity but low CO2 selectivity on binary PtSn in the direct ethanol fuel cell. Phys Chem Chem Phys 2014; 16:9432-40. [DOI: 10.1039/c4cp00859f] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Combined electrochemical in situ FTIR and DFT study provides an insight into ethanol fuel cell catalysis on the most active binary catalyst, PtSn, at the atomic and molecular levels.
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Affiliation(s)
- Jia-Mei Jin
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast BT9 5AG, UK
| | - Tian Sheng
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast BT9 5AG, UK
| | - Xiao Lin
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast BT9 5AG, UK
| | - Richard Kavanagh
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast BT9 5AG, UK
| | - Philip Hamer
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast BT9 5AG, UK
| | - Peijun Hu
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast BT9 5AG, UK
| | - Christopher Hardacre
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast BT9 5AG, UK
| | | | | | | | - Wen-Feng Lin
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast BT9 5AG, UK
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230
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Daubinger P, Kieninger J, Unmüssig T, Urban GA. Electrochemical characteristics of nanostructured platinum electrodes – a cyclic voltammetry study. Phys Chem Chem Phys 2014; 16:8392-9. [DOI: 10.1039/c4cp00342j] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article describes the electrochemical phenomena occurring at nanostructured platinum electrodes with high electrochemically active surface areas.
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Affiliation(s)
- P. Daubinger
- University of Freiburg
- Department of Microsystems Engineering – IMTEK, Laboratory for Sensors
- 79110 Freiburg, Germany
| | - J. Kieninger
- University of Freiburg
- Department of Microsystems Engineering – IMTEK, Laboratory for Sensors
- 79110 Freiburg, Germany
| | - T. Unmüssig
- University of Freiburg
- Department of Microsystems Engineering – IMTEK, Laboratory for Sensors
- 79110 Freiburg, Germany
| | - G. A. Urban
- University of Freiburg
- Department of Microsystems Engineering – IMTEK, Laboratory for Sensors
- 79110 Freiburg, Germany
- University of Freiburg, Freiburg Materials Research Center (FMF)
- 79104 Freiburg, Germany
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231
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Alia SM, Yan YS, Pivovar BS. Galvanic displacement as a route to highly active and durable extended surface electrocatalysts. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00736k] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spontaneous galvanic displacement has been utilized in the development of novel electrocatalysts.
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Affiliation(s)
- S. M. Alia
- Chemical and Materials Science Center
- National Renewable Energy Laboratory
- Golden, USA
| | - Y. S. Yan
- Department of Chemical and Biomolecular Engineering
- University of Delaware
- Newark, USA
| | - B. S. Pivovar
- Chemical and Materials Science Center
- National Renewable Energy Laboratory
- Golden, USA
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232
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Jin H, Xiong T, Li Y, Xu X, Li M, Wang Y. Improved electrocatalytic activity for ethanol oxidation by Pd@N-doped carbon from biomass. Chem Commun (Camb) 2014; 50:12637-40. [DOI: 10.1039/c4cc06206j] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The incorporation of nitrogen makes Pd@CN exhibit superior catalytic activity towards ethanol oxidation to Pd@AC and Pd@HC.
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Affiliation(s)
- Haiyan Jin
- Carbon Nano Materials Group
- ZJU-NHU United R&D Center
- Center for Chemistry of High-Performance and Novel Materials
- Key Lab of Applied Chemistry of Zhejiang Province
- Department of Chemistry
| | - Tianyi Xiong
- Carbon Nano Materials Group
- ZJU-NHU United R&D Center
- Center for Chemistry of High-Performance and Novel Materials
- Key Lab of Applied Chemistry of Zhejiang Province
- Department of Chemistry
| | - Yi Li
- Carbon Nano Materials Group
- ZJU-NHU United R&D Center
- Center for Chemistry of High-Performance and Novel Materials
- Key Lab of Applied Chemistry of Zhejiang Province
- Department of Chemistry
| | - Xuan Xu
- Carbon Nano Materials Group
- ZJU-NHU United R&D Center
- Center for Chemistry of High-Performance and Novel Materials
- Key Lab of Applied Chemistry of Zhejiang Province
- Department of Chemistry
| | - Mingming Li
- Carbon Nano Materials Group
- ZJU-NHU United R&D Center
- Center for Chemistry of High-Performance and Novel Materials
- Key Lab of Applied Chemistry of Zhejiang Province
- Department of Chemistry
| | - Yong Wang
- Carbon Nano Materials Group
- ZJU-NHU United R&D Center
- Center for Chemistry of High-Performance and Novel Materials
- Key Lab of Applied Chemistry of Zhejiang Province
- Department of Chemistry
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233
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Prieto MJ, Carbonio EA, Fatayer S, Landers R, Siervo AD. Electronic and structural study of Pt-modified Au vicinal surfaces: a model system for Pt–Au catalysts. Phys Chem Chem Phys 2014; 16:13329-39. [DOI: 10.1039/c4cp01448k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Morphology and electronic properties of Pt nanostructures are influenced by the underlying Au surface orientation and surface alloy formation, respectively.
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Affiliation(s)
- Mauricio J. Prieto
- Departamento de Física Aplicada
- Instituto de Física Gleb Wataghin
- Universidade Estadual de Campinas
- Campinas, Brazil
| | - Emilia A. Carbonio
- Departamento de Física Aplicada
- Instituto de Física Gleb Wataghin
- Universidade Estadual de Campinas
- Campinas, Brazil
| | - Shadi Fatayer
- Departamento de Física Aplicada
- Instituto de Física Gleb Wataghin
- Universidade Estadual de Campinas
- Campinas, Brazil
| | - Richard Landers
- Departamento de Física Aplicada
- Instituto de Física Gleb Wataghin
- Universidade Estadual de Campinas
- Campinas, Brazil
| | - Abner de Siervo
- Departamento de Física Aplicada
- Instituto de Física Gleb Wataghin
- Universidade Estadual de Campinas
- Campinas, Brazil
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234
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St John S, Boolchand P, Angelopoulos AP. Improved electrocatalytic ethanol oxidation activity in acidic and alkaline electrolytes using size-controlled Pt-Sn nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:16150-16159. [PMID: 24313249 DOI: 10.1021/la403704w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The promotion of the electrocatalytic ethanol oxidation reaction (EOR) on extended single-crystal Pt surfaces and dispersed Pt nanoparticles by Sn under acidic conditions is well known. However, the correlation of Sn coverage on Pt nanoparticle electrocatalysts to their size has proven difficult. The reason is that previous investigations have typically relied on commercially difficult to reproduce electrochemical treatments of prepared macroscopic electrodes to adsorb Sn onto exposed Pt surfaces. We demonstrate here how independent control over both Sn coverage and particle size can yield a significant enhancement in EOR activity in an acidic electrolyte relative to previously reported electrocatalysts. Our novel approach uses electroless nanoparticle synthesis where surface-adsorbed Sn is intrinsic to Pt particle formation. Sn serves as both a reducing agent and stabilizing ligand, producing particles with a narrow particle size distribution in a size range where the mass-specific electrocatalytic activity can be maximized (ca. 1-4 nm) as a result of the formation of a fully developed Sn shell. The extent of fractional Sn surface coverage on carbon-supported Pt nanoparticles can be systematically varied through wet-chemical treatment subsequent to nanoparticle formation but prior to incorporation into macroscopic electrodes. EOR activity for Pt nanoparticles is found to be optimum at a fractional Sn surface coverage of ca. 0.6. Furthermore, the EOR activity is shown to increase with Pt particle size and correlate with the active area of available Pt (110) surface sites for the corresponding Sn-free nanoparticles. The maximum area- and mass-specific EOR activities for the most active catalyst investigated were 17.9 μA/cm(2)Pt and 12.5 A/gPt, respectively, after 1 h of use at 0.42 V versus RHE in an acidic electrolyte. Such activity is a substantial improvement over that of commercially available Pt, Pt-Sn, and Pt-Ru alloy catalysts under either acidic or alkaline conditions.
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Affiliation(s)
- Samuel St John
- Chemical Engineering Program School of Energy, Environmental, and Biological & Medical Engineering and ‡Computer and Electrical Engineering Program School of Electronic and Computing Systems, University of Cincinnati , Cincinnati, Ohio 45221, United States
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235
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Tarasevich MR, Korchagin OV, Kuzov AV. Electrocatalysis of anodic oxidation of ethanol. RUSSIAN CHEMICAL REVIEWS 2013. [DOI: 10.1070/rc2013v082n11abeh004276] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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236
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Melaet G, Lindeman AE, Somorjai GA. Cobalt Particle Size Effects in the Fischer–Tropsch Synthesis and in the Hydrogenation of CO2 Studied with Nanoparticle Model Catalysts on Silica. Top Catal 2013. [DOI: 10.1007/s11244-013-0206-z] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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237
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Analysis of the selectivity of PtRh/C and PtRhSn/C to the formation of CO2 during ethanol electrooxidation. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.09.030] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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238
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Leong GJ, Schulze MC, Strand MB, Maloney D, Frisco SL, Dinh HN, Pivovar B, Richards RM. Shape-directed platinum nanoparticle synthesis: nanoscale design of novel catalysts. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.3048] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- G. Jeremy Leong
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
- Hydrogen Technologies and Systems Center; National Renewable Energy Laboratory; Golden CO 80401 USA
| | - Maxwell C. Schulze
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
| | - Matthew B Strand
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
| | - David Maloney
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
| | - Sarah L. Frisco
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
| | - Huyen N. Dinh
- Hydrogen Technologies and Systems Center; National Renewable Energy Laboratory; Golden CO 80401 USA
| | - Bryan Pivovar
- Hydrogen Technologies and Systems Center; National Renewable Energy Laboratory; Golden CO 80401 USA
| | - Ryan M. Richards
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
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239
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Shi F, Baker LR, Hervier A, Somorjai GA, Komvopoulos K. Tuning the electronic structure of titanium oxide support to enhance the electrochemical activity of platinum nanoparticles. NANO LETTERS 2013; 13:4469-4474. [PMID: 23924204 DOI: 10.1021/nl402392u] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Two times higher activity and three times higher stability in methanol oxidation reaction, a 0.12 V negative shift of the CO oxidation peak potential, and a 0.07 V positive shift of the oxygen reaction potential compared to Pt nanoparticles on pristine TiO2 support were achieved by tuning the electronic structure of the titanium oxide support of Pt nanoparticle catalysts. This was accomplished by adding oxygen vacancies or doping with fluorine. Experimental trends are interpreted in the context of an electronic structure model, showing an improvement in electrochemical activity when the Fermi level of the support material in Pt/TiOx systems is close to the Pt Fermi level and the redox potential of the reaction. The present approach provides guidance for the selection of the support material of Pt/TiOx systems and may be applied to other metal-oxide support materials, thus having direct implications in the design and optimization of fuel cell catalyst supports.
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Affiliation(s)
- Feifei Shi
- Department of Mechanical Engineering and ‡Department of Chemistry, University of California , Berkeley, California 94720, United States
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240
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Guo W, Stamatakis M, Vlachos DG. Design Principles of Heteroepitaxial Bimetallic Catalysts. ACS Catal 2013. [DOI: 10.1021/cs4005166] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wei Guo
- Center
for Catalytic Science and Technology, Department of Chemical and Biomolecular
Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Michail Stamatakis
- Center
for Catalytic Science and Technology, Department of Chemical and Biomolecular
Engineering, University of Delaware, Newark, Delaware 19716, United States
- Department
of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, U.K
| | - Dionisios G. Vlachos
- Center
for Catalytic Science and Technology, Department of Chemical and Biomolecular
Engineering, University of Delaware, Newark, Delaware 19716, United States
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241
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Zhang R, Wang G, Wang B. Insights into the mechanism of ethanol formation from syngas on Cu and an expanded prediction of improved Cu-based catalyst. J Catal 2013. [DOI: 10.1016/j.jcat.2013.05.028] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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242
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Li M, Zhou WP, Marinkovic N, Sasaki K, Adzic R. The role of rhodium and tin oxide in the platinum-based electrocatalysts for ethanol oxidation to CO2. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.10.046] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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243
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Yang J, Xie Y, Wang R, Jiang B, Tian C, Mu G, Yin J, Wang B, Fu H. Synergistic effect of tungsten carbide and palladium on graphene for promoted ethanol electrooxidation. ACS APPLIED MATERIALS & INTERFACES 2013; 5:6571-9. [PMID: 23826619 DOI: 10.1021/am401216s] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The synergistic effect of WC and Pd has large benefit for ethanol electrooxidation. The small-sized Pd nanoparticles (NPs) decorated tungsten carbide on graphene (Pd-WC/GN) will be a promising anode catalyst for the direct ethanol fuel cells. The density functional theory (DFT) calculations reveal that the strong interaction exists at the interface between Pd and WC, which induces the electron transfer from WC to Pd. Fortunately, the nanoscale architecture of Pd-WC/GN has been successfully fabricated in our experiments. X-ray photoelectron spectrum further confirms the existence of electron transfer from WC to Pd in a Pd-WC/GN nanohybrid. Notably, electrochemical tests show that the Pd-WC/GN catalyst exhibits low onset potential, a large electrochemical surface area, high activity, and stability for ethanol electrooxidation in alkaline solution compared with Pd/graphene and Pd/commercial Vulcan 72R carbon catalysts. The enhancement can be attributed to the synergistic effect of Pd and WC on graphene. At the interface between Pd and WC, the electron transfer from WC to Pd leads to the increased electron densities of surface Pd, which is available for weakening adsorption of intermediate oxygen-containing species such as CO and activating catalyst. Meanwhile, the increased tungsten oxide induced by electron transfer can facilitate the effective removal of intermediate species adsorbed on the Pd surface through a bifunctional mechanism or hydrogen spillover effect.
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Affiliation(s)
- Jun Yang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China
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244
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Yin J, Shan S, Ng MS, Yang L, Mott D, Fang W, Kang N, Luo J, Zhong CJ. Catalytic and electrocatalytic oxidation of ethanol over palladium-based nanoalloy catalysts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:9249-9258. [PMID: 23841935 DOI: 10.1021/la401839m] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The control of the nanoscale composition and structure of alloy catalysts plays an important role in heterogeneous catalysis. This paper describes novel findings of an investigation for Pd-based nanoalloy catalysts (PdCo and PdCu) for ethanol oxidation reaction (EOR) in gas phase and alkaline electrolyte. Although the PdCo catalyst exhibits a mass activity similar to Pd, the PdCu catalyst is shown to display a much higher mass activity than Pd for the electrocatalytic EOR in alkaline electrolyte. This finding is consistent with the finding on the surface enrichment of Pd on the alloyed PdCu surface, in contrast to the surface enrichment of Co in the alloyed PdCo surface. The viability of C-C bond cleavage was also probed for the PdCu catalysts in both gas-phase and electrolyte-phase EOR. In the gas-phase reaction, although the catalytic conversion rate for CO2 product is higher over Pd than PdCu, the nanoalloy PdCu catalyst appears to suppress the formation of acetic acid, which is a significant portion of the product in the case of pure Pd catalyst. In the alkaline electrolyte, CO2 was detected from the gas phase above the electrolyte upon acid treatment following the electrolysis, along with traces of aldehyde and acetic acid. An analysis of the electrochemical properties indicates that the oxophilicity of the base metal alloyed with Pd, in addition to the surface enrichment of metals, may have played an important role in the observed difference of the catalytic and electrocatalytic activities. In comparison with Pd alloyed with Co, the results for Pd alloyed with Cu showed a more significant positive shift of the reduction potential of the oxygenated Pd species on the surface. These findings have important implications for further fine-tuning of the Pd nanoalloys in terms of base metal composition toward highly active and selective catalysts for EOR.
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Affiliation(s)
- Jun Yin
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, USA
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245
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246
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Wang AL, Xu H, Feng JX, Ding LX, Tong YX, Li GR. Design of Pd/PANI/Pd Sandwich-Structured Nanotube Array Catalysts with Special Shape Effects and Synergistic Effects for Ethanol Electrooxidation. J Am Chem Soc 2013; 135:10703-9. [DOI: 10.1021/ja403101r] [Citation(s) in RCA: 328] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- An-Liang Wang
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Han Xu
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Jin-Xian Feng
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Liang-Xin Ding
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Ye-Xiang Tong
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Gao-Ren Li
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
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247
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Syu CY, Wang JH. Mechanistic Study of the Oxidative Steam Reforming of EtOH on Rh(111): The Importance of the Oxygen Effect. ChemCatChem 2013. [DOI: 10.1002/cctc.201200964] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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248
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Castro JC, Assumpção MHMT, de Souza RFB, Spinacé EV, Neto AO. Electro-Oxidation of Ethanol on PtSnRh/C-Sb2O5·SnO2 Electrocatalysts Prepared by Borohydride Reduction. Electrocatalysis (N Y) 2013. [DOI: 10.1007/s12678-013-0134-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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249
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Li HH, Zhao S, Gong M, Cui CH, He D, Liang HW, Wu L, Yu SH. Ultrathin PtPdTe Nanowires as Superior Catalysts for Methanol Electrooxidation. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302090] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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250
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Li HH, Zhao S, Gong M, Cui CH, He D, Liang HW, Wu L, Yu SH. Ultrathin PtPdTe Nanowires as Superior Catalysts for Methanol Electrooxidation. Angew Chem Int Ed Engl 2013; 52:7472-6. [DOI: 10.1002/anie.201302090] [Citation(s) in RCA: 194] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 04/26/2013] [Indexed: 11/06/2022]
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