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Arias-Pinedo O, Cardenas Riojas AA, Pastor E, López EO, Perez G, Archanjo BS, Ponce-Vargas M, Planes GÁ, Baena-Moncada AM. Hierarchical Porous Carbon-PtPd Catalysts and Their Activity toward Oxygen Reduction Reaction. ACS OMEGA 2022; 7:20860-20871. [PMID: 35755396 PMCID: PMC9219087 DOI: 10.1021/acsomega.2c01457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 05/11/2022] [Indexed: 06/15/2023]
Abstract
PtPd bimetallic catalysts supported on hierarchical porous carbon (HPC) with different porous sizes were developed for the oxygen reduction reaction (ORR) toward fuel cell applications. The HPC pore size was controlled by using SiO2 nanoparticles as a template with different sizes, 287, 371, and 425 nm, to obtain three HPC materials denoted as HPC-1, HPC-2, and HPC-3, respectively. PtPd/HPC catalysts were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy. The electrochemical performance was examined by cyclic voltammetry and linear sweep voltammetry. PtPd/HPC-2 turned out to be the most optimal catalyst with an electroactive surface area (ESA) of 40.2 m2 g-1 and a current density for ORR of -1285 A g-1 at 2 mV s-1 and 1600 rpm. In addition, we conducted a density functional theory computational study to examine the interactions between a PtPd cluster and a graphitic domain of HPC, as well as the interaction between the catalyst and the oxygen molecule. These results reveal the strong influence of the porous size (in HPC) and ESA values (in PtPd nanoparticles) in the mass transport process which rules the electrochemical performance.
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Affiliation(s)
- Ofelia
Marilu Arias-Pinedo
- Laboratorio
de Investigación de Electroquímica Aplicada, Facultad
de Ciencias, Universidad Nacional de Ingeniería, Av. Túpac Amaru 210, Rímac, Lima 15333, Perú
| | - Andy A. Cardenas Riojas
- Laboratorio
de Investigación de Electroquímica Aplicada, Facultad
de Ciencias, Universidad Nacional de Ingeniería, Av. Túpac Amaru 210, Rímac, Lima 15333, Perú
| | - Elena Pastor
- Departamento
de Química, Instituto de Materiales
y Nanotecnología, Universidad de La Laguna, Avenida Astrofísico F. Sánchez S/N,
38200, P. O. Box 456, La Laguna, Tenerife, Spain
| | - Elvis O. López
- Laboratorio
de Investigación de Electroquímica Aplicada, Facultad
de Ciencias, Universidad Nacional de Ingeniería, Av. Túpac Amaru 210, Rímac, Lima 15333, Perú
- Department
of Experimental Low Energy Physics, Brazilian
Center for Research in Physics (CBPF), Rio de Janeiro 22290-180, Brazil
| | - Geronimo Perez
- Department
of Engineering, Federal Fluminense University
(UFF), Niteroi, Rio de Janeiro 24210-240, Brazil
| | - Braulio S. Archanjo
- Materials
Metrology Division, National Institute of
Metrology Quality and Technology (INMETRO), Rio de Janeiro 25250-020, Brazil
| | - Miguel Ponce-Vargas
- Institut
de Chimie Moléculaire de Reims, Université
de Reims Champagne-Ardenne, Reims 51687, France
| | - Gabriel Ángel Planes
- Facultad
de Ciencias Exactas Fisicoquímicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nac. 36, Km 601, Río Cuarto, Córdoba, Argentina
- Instituto
de Investigaciones en Tecnologías Energéticas y Materiales
Avanzados (IITEMA), Universidad Nacional
de Río Cuarto, Ruta Nac. 36, Km 601, Río Cuarto, Córdoba, Argentina
| | - Angélica María Baena-Moncada
- Laboratorio
de Investigación de Electroquímica Aplicada, Facultad
de Ciencias, Universidad Nacional de Ingeniería, Av. Túpac Amaru 210, Rímac, Lima 15333, Perú
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2
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Ma J, Wei W, Qin G, Xiao T, Tang W, Zhao S, Jiang L, Liu S. Electrochemical reduction of nitrate in a catalytic carbon membrane nano-reactor. WATER RESEARCH 2022; 208:117862. [PMID: 34814021 DOI: 10.1016/j.watres.2021.117862] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 11/06/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
Nitrate pollution is a critical environmental issue in need of urgent addressing. Electrochemical reduction is an attractive strategy for treating nitrate due to the environmental friendliness. However, it is still a challenge to achieve the simultaneous high activity and selectivity. Here we report the design of a porous tubular carbon membrane as the electrode deposited with catalysts, which provides a large triple-phase boundary area for nitrate removal reactions. The achieved nitrate removal rate is one order of magnitude higher than other literatures with high nitrate conversion and high selectivity of nitrogen. The carbon membrane itself had a limited catalytic property thus Cu-Pd bimetal catalysts were deposited inside the nano-pores to enhance the activity and selectivity. When Na2SO4 electrolyte was applied, the achieved single-pass removal of nitrate was increased from 55.15% (for blank membrane) to 97.12% by adding catalysts inside the membrane. In case of NaOH as the electrolyte, the single-pass nitrate removal efficiency, selectivity to nitrogen formation and nitrate removal rate was 90.66%, 96.40% and 1.47 × 10-3 mmol min-1 cm-2, respectively. Density functional theory studies demonstrate that the loading of bimetal catalysts compared with single metal catalysts enhances the adsorption of *NO3 on membrane surface favorable for N2 formation than NH3 on Cu-Pd surface. The application of catalytic carbon membrane nano-reactors can open new windows for nitrate removal due to the high reactor efficiency.
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Affiliation(s)
- Jing Ma
- School of Space and Environment, Beihang University, Shahe Campus, Beijing 102206, China
| | - Wei Wei
- College of Biochemical Engineering, Beijing Union University, 18 Sanqu Fatouxili, Chaoyang District, Beijing 100023, China
| | - Guotong Qin
- School of Space and Environment, Beihang University, Shahe Campus, Beijing 102206, China.
| | - Tianliang Xiao
- School of Energy and Power Engineering, Beihang University, Shahe Campus, Beijing 102206, China
| | - Weiqiang Tang
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Shuangliang Zhao
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Lei Jiang
- School of Chemistry, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, 37 Xueyuan Road, Beijing 100191, China
| | - Shaomin Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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3
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Zhao Q, Chu C, Xiao X, Chen B. Selectively coupled small Pd nanoparticles on sp 2-hybridized domain of graphene-based aerogel with enhanced catalytic activity and stability. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 771:145396. [PMID: 33736138 DOI: 10.1016/j.scitotenv.2021.145396] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/19/2021] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
The precisely coupling of metal nanoparticles with support domain are crucial to enhance the catalytic activity and stability of supported metal nanoparticle catalysts (MNPs). Here we selectively anchor Pd nanoparticles to the sp2 domain in graphene-based aerogel constructed with base-washed graphene oxide (BGO) by removing oxidative debris (OD). The effects of OD on the size and chemical composition of Pd nanoparticles in aerogels are initially unveiled. The removal of OD nanoparticles prompt selective coupling of Pd nanoparticles to the exposed sp2-hybridized domain on BGO nanosheets, and then prevent it from agglomeration. As a result, the Pd nanoparticle size of self-assembled Pd/BGA is 4.67 times smaller than that of traditional Pd/graphene oxide aerogel (Pd/GA). The optimal catalytic activity of Pd/BGA for the model catalytic reduction of 4-nitrophenol is 15 times higher than that of Pd/GA. Pd/BGA could maintain its superior catalytic activity and achieves 98.72% conversion in the fifth cycle. The superior catalytic performance could be ascribed to the small Pd nanoparticles and high percentage of Pd(0) in Pd/BGA, and the enhanced electronic conductivity of Pd/BGA. These integrated merits of Pd/BGA as heterogeneous catalysts are attributed to selectively anchor Pd nanoparticles on sp2-hybridized domain of graphene-based aerogel, and strongly coupled interaction of MNPs with support. The structure-regulated BGO nanosheets could serve as versatile building blocks for fabricating MNPs/graphene aerogels with superior performance for catalytic transformation of water pollutants.
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Affiliation(s)
- Qiang Zhao
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
| | - Chiheng Chu
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
| | - Xin Xiao
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - Baoliang Chen
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China.
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4
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Tate GL, Mehrabadi BAT, Xiong W, Kenvin A, Monnier JR. Synthesis of Highly Active Pd@Cu-Pt/C Methanol Oxidation Electrocatalysts via Continuous, Co-Electroless Deposition. NANOMATERIALS 2021; 11:nano11030793. [PMID: 33808842 PMCID: PMC8003816 DOI: 10.3390/nano11030793] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/09/2021] [Accepted: 03/15/2021] [Indexed: 12/20/2022]
Abstract
Controlled deposition of metals is essential for the creation of bimetallic catalysts having predictable composition and character. Continuous co-electroless deposition (co-ED) permits the creation of bimetallic catalysts with predictive control over composition. This method was applied to create a suite of Cu–Pt mixed-metal shell catalysts for use in methanol electrooxidation in direct methanol fuel cell applications (DMFCs). Enhanced performance of Cu–Pt compositions over Pt alone was predicted by existing computational studies in the literature. Experimental evidence from this study supports the bifunctional catalyst explanation for enhanced activity and confirms the optimum Cu:Pt ratio as Cu3Pt for this methanol electrooxidation. This ability to control the composition of a bimetallic shell can be extended to other systems where the ratio of two metals is critical for catalytic performance.
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Affiliation(s)
- Gregory L. Tate
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA; (G.L.T.); (B.A.T.M.); (W.X.); (A.K.)
| | - Bahareh Alsadat Tavakoli Mehrabadi
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA; (G.L.T.); (B.A.T.M.); (W.X.); (A.K.)
- Research and Development, Nikola Motors, Phoenix, AZ 85040, USA
| | - Wen Xiong
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA; (G.L.T.); (B.A.T.M.); (W.X.); (A.K.)
| | - Adam Kenvin
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA; (G.L.T.); (B.A.T.M.); (W.X.); (A.K.)
| | - John R. Monnier
- Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA; (G.L.T.); (B.A.T.M.); (W.X.); (A.K.)
- Correspondence: ; Tel.: +1-803-777-6813
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5
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Hannagan RT, Giannakakis G, Flytzani-Stephanopoulos M, Sykes ECH. Single-Atom Alloy Catalysis. Chem Rev 2020; 120:12044-12088. [DOI: 10.1021/acs.chemrev.0c00078] [Citation(s) in RCA: 286] [Impact Index Per Article: 71.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Pikna L, Heželová M, Milkovič O, Smrčová M. Study on electrochemical properties of Pd-C and Pd-CNT catalysts. PARTICULATE SCIENCE AND TECHNOLOGY 2019. [DOI: 10.1080/02726351.2018.1445151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- L’. Pikna
- Institute of Recycling Technologies, Faculty of Metallurgy, Technical University of Kosice, Košice, Slovakia
| | - M. Heželová
- Institute of Recycling Technologies, Faculty of Metallurgy, Technical University of Kosice, Košice, Slovakia
| | - O. Milkovič
- Institute of Materials Research, Slovak Academy of Science, Košice, Slovakia
- Institute of Materials and Quality Engineering, Faculty of Materials, Metallurgy and Recycling, Technical university of Košice, Košice, Slovakia
| | - M. Smrčová
- Department of Chemistry, Biochemistry and Biophysics, University of Veterinary Medicine and Pharmacy in Košice, Košice, Slovakia
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7
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Tate G, Kenvin A, Diao W, Monnier JR. Preparation of Pt-containing bimetallic and trimetallic catalysts using continuous electroless deposition methods. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.12.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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8
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Wang W, Wang Z, Wang J, Zhong C, Liu C. Highly Active and Stable Pt-Pd Alloy Catalysts Synthesized by Room-Temperature Electron Reduction for Oxygen Reduction Reaction. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2017; 4:1600486. [PMID: 28435780 PMCID: PMC5396164 DOI: 10.1002/advs.201600486] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 12/19/2016] [Indexed: 05/22/2023]
Abstract
Carbon-supported platinum (Pt) and palladium (Pd) alloy catalyst has become a promising alternative electrocatalyst for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. In this work, the synthesis of highly active and stable carbon-supported Pt-Pd alloy catalysts is reported with a room-temperature electron reduction method. The alloy nanoparticles thus prepared show a particle size around 2.6 nm and a core-shell structure with Pt as the shell. With this structure, the breaking of O-O bands and desorption of OH are both promoted in electrocatalysis of ORR. In comparison with the commercial Pt/C catalyst prepared by conventional method, the mass activity of the Pt-Pd/C catalyst for ORR is shown to increase by a factor of ≈4. After 10 000-cycle durability test, the Pt-Pd/C catalyst is shown to retain 96.5% of the mass activity, which is much more stable than that of the commercial Pt/C catalyst.
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Affiliation(s)
- Wei Wang
- Collaborative Innovation Center of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin300072P. R. China
| | - Zongyuan Wang
- Collaborative Innovation Center of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin300072P. R. China
| | - Jiajun Wang
- Collaborative Innovation Center of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin300072P. R. China
| | - Chuan‐Jian Zhong
- Department of ChemistryState University of New York at BinghamtonBinghamtonNY13902USA
| | - Chang‐Jun Liu
- Collaborative Innovation Center of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin300072P. R. China
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9
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Directed Dispersion of Au Based Catalysts at H2 Reduction Process for Aerobic Oxidation of Benzyl Alcohol. Catal Letters 2016. [DOI: 10.1007/s10562-016-1938-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Synthesis and Electrochemical Evaluation of Carbon Supported Pt-Co Bimetallic Catalysts Prepared by Electroless Deposition and Modified Charge Enhanced Dry Impregnation. Catalysts 2016. [DOI: 10.3390/catal6060083] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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11
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Wang H, Liu D, Xu C. Directed synthesis of well dispersed and highly active AuCu and AuNi nanoparticle catalysts. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00799f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Supported bimetallic AuCu and AuNi catalysts were prepared via a controlled synthesis by controlling the dispersion of both the first metal and second metal.
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Affiliation(s)
- Hanfei Wang
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University)
- Ministry of Education
- Xi'an 710119
- PR China
- School of Chemistry and Chemical Engineering
| | - Dan Liu
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University)
- Ministry of Education
- Xi'an 710119
- PR China
- School of Chemistry and Chemical Engineering
| | - Chunli Xu
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University)
- Ministry of Education
- Xi'an 710119
- PR China
- School of Chemistry and Chemical Engineering
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12
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Grigoriev SA, Fedotov AA, Murzin VY, Khramov EV, Zubavichus YV, Millet P, Lyutikova EK, Martemianov SA, Fateev VN. Study of nanostructured electrocatalysts synthesized by the platinum magnetron–ion-beam sputtering onto metallized nanostructured carbonaceous support. RUSS J ELECTROCHEM+ 2015. [DOI: 10.1134/s1023193515090062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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The Effect of Rapid Thermal Annealing on Sputtered Pt and Pt3Pd2 Thin Film Electrocatalysts for Aqueous SO2 Electro-Oxidation. Electrocatalysis (N Y) 2015. [DOI: 10.1007/s12678-015-0274-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Direct Synthesis of Hydrogen Peroxide Over Au–Pd Catalysts Prepared by Electroless Deposition. Catal Letters 2015. [DOI: 10.1007/s10562-015-1621-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Diao W, Tengco JMM, Regalbuto JR, Monnier JR. Preparation and Characterization of Pt–Ru Bimetallic Catalysts Synthesized by Electroless Deposition Methods. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01011] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weijian Diao
- Department
of Chemical Engineering, Swearingen Engineering Center, University of South Carolina, 301 Main Street, Columbia, South Carolina 29208 United States
| | - John Meynard M. Tengco
- Department
of Chemical Engineering, Swearingen Engineering Center, University of South Carolina, 301 Main Street, Columbia, South Carolina 29208 United States
| | - John R. Regalbuto
- Department
of Chemical Engineering, Swearingen Engineering Center, University of South Carolina, 301 Main Street, Columbia, South Carolina 29208 United States
| | - John R. Monnier
- Department
of Chemical Engineering, Swearingen Engineering Center, University of South Carolina, 301 Main Street, Columbia, South Carolina 29208 United States
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16
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Hakim SH, Sener C, Alba-Rubio AC, Gostanian TM, O’Neill BJ, Ribeiro FH, Miller JT, Dumesic JA. Synthesis of supported bimetallic nanoparticles with controlled size and composition distributions for active site elucidation. J Catal 2015. [DOI: 10.1016/j.jcat.2014.12.015] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells. Catalysts 2015. [DOI: 10.3390/catal5031221] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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18
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Galhenage RP, Xie K, Diao W, Tengco JMM, Seuser GS, Monnier JR, Chen DA. Platinum-ruthenium bimetallic clusters on graphite: a comparison of vapor deposition and electroless deposition methods. Phys Chem Chem Phys 2015; 17:28354-63. [PMID: 26018140 DOI: 10.1039/c5cp00075k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bimetallic Pt-Ru clusters have been grown on highly ordered pyrolytic graphite (HOPG) surfaces by vapor deposition and by electroless deposition. These studies help to bridge the material gap between well-characterized vapor deposited clusters and electrolessly deposited clusters, which are better suited for industrial catalyst preparation. In the vapor deposition experiments, bimetallic clusters were formed by the sequential deposition of Pt on Ru or Ru on Pt. Seed clusters of the first metal were grown on HOPG surfaces that were sputtered with Ar(+) to introduce defects, which act as nucleation sites for Pt or Ru. On the unmodified HOPG surface, both Pt and Ru clusters preferentially nucleated at the step edges, whereas on the sputtered surface, clusters with relatively uniform sizes and spatial distributions were formed. Low energy ion scattering experiments showed that the surface compositions of the bimetallic clusters are Pt-rich, regardless of the order of deposition, indicating that the interdiffusion of metals within the clusters is facile at room temperature. Bimetallic clusters on sputtered HOPG were prepared by the electroless deposition of Pt on Ru seed clusters from a Pt(+2) solution using dimethylamine borane as the reducing agent at pH 11 and 40 °C. After exposure to the electroless deposition bath, Pt was selectively deposited on Ru, as demonstrated by the detection of Pt on the surface by XPS, and the increase in the average cluster height without an increase in the number of clusters, indicating that Pt atoms are incorporated into the Ru seed clusters. Electroless deposition of Ru on Pt seed clusters was also achieved, but it should be noted that this deposition method is extremely sensitive to the presence of other metal ions in solution that have a higher reduction potential than the metal ion targeted for deposition.
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Affiliation(s)
- Randima P Galhenage
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA.
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19
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Cho HR, Regalbuto JR. The rational synthesis of Pt-Pd bimetallic catalysts by electrostatic adsorption. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.09.029] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Ortiz N, Weiner RG, Skrabalak SE. Ligand-controlled Co-reduction versus electroless Co-deposition: synthesis of nanodendrites with spatially defined bimetallic distributions. ACS NANO 2014; 8:12461-12467. [PMID: 25490676 DOI: 10.1021/nn5052822] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The predictable synthesis of bimetallic nanostructures via co-reduction of two metal precursors is challenging due to our limited understanding of precursor ligand effects. Here, the influence of different metal-ligand environments is systematically examined in the synthesis of Pd-Pt nanostructures as a model bimetallic system. Nanodendrites with different spatially defined Pd-Pt compositions are achieved, where the local ligand environments of metal precursors dictate if temporally separated co-reduction dominates to achieve core-shell nanostructures or whether electroless co-deposition proceeds to facilitate alloyed nanostructure formation. As the properties of bimetallic nanomaterials depend on crystal ordering and composition, chemical routes to structurally defined bimetallic nanomaterials are critically needed. The approaches reported here should be applicable to other bimetallic compositions given the established reactivity of coordination complexes available for use as precursors.
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Affiliation(s)
- Nancy Ortiz
- Department of Chemistry, Indiana University , 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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21
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Li SS, Lv JJ, Teng LN, Wang AJ, Chen JR, Feng JJ. Facile synthesis of PdPt@Pt nanorings supported on reduced graphene oxide with enhanced electrocatalytic properties. ACS APPLIED MATERIALS & INTERFACES 2014; 6:10549-10555. [PMID: 24960067 DOI: 10.1021/am502148z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this work, a facile one-pot wet-chemical method was developed for the self-assembly of PdPt@Pt nanorings via in situ reduction of [PdCl4](2-) and [PtCl6](2-) at room temperature, which are simultaneously dispersed on reduced graphene oxide (rGO; denoted as PdPt@Pt/rGO). Hexadecylpyridinium chloride was demonstrated as a shape-directing agent and formic acid as a reducing agent during the reaction process. The as-prepared PdPt@Pt/rGO exhibited enhanced electrocatalytic activity and better stability for oxygen reduction reaction and ethanol oxidation reaction in acid media, compared with PtPd/rGO, Pt/rGO, Pd/rGO, Pt black, and Pt/C catalysts.
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Affiliation(s)
- Shan-Shan Li
- College of Chemistry and Life Science, College of Geography and Environmental Science, Zhejiang Normal University , Jinhua 321004, China
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22
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Sun J, Fu Y, He G, Sun X, Wang X. Catalytic hydrogenation of nitrophenols and nitrotoluenes over a palladium/graphene nanocomposite. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00048j] [Citation(s) in RCA: 147] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A plausible mechanism for the reduction of p-nitrophenol catalyzed by a Pd/G catalyst in the presence of sodium borohydride.
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Affiliation(s)
- Jingwen Sun
- Key Laboratory of Soft Chemistry and Functional Materials
- (Nanjing University of Science and Technology)
- Ministry of Education
- Nanjing, China
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering
| | - Yongsheng Fu
- Key Laboratory of Soft Chemistry and Functional Materials
- (Nanjing University of Science and Technology)
- Ministry of Education
- Nanjing, China
| | - Guangyu He
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering
- Changzhou University
- Changzhou 213164, China
| | - Xiaoqiang Sun
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering
- Changzhou University
- Changzhou 213164, China
| | - Xin Wang
- Key Laboratory of Soft Chemistry and Functional Materials
- (Nanjing University of Science and Technology)
- Ministry of Education
- Nanjing, China
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Huang H, Wang X. Design and synthesis of Pd–MnO2 nanolamella–graphene composite as a high-performance multifunctional electrocatalyst towards formic acid and methanol oxidation. Phys Chem Chem Phys 2013; 15:10367-75. [DOI: 10.1039/c3cp51569a] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Effect of deposition sequences on electrocatalytic properties of PtPd/C catalysts for formic acid electrooxidation. CATAL COMMUN 2011. [DOI: 10.1016/j.catcom.2011.01.012] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Palladium-based electrodes: A way to reduce platinum content in polymer electrolyte membrane fuel cells. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.11.101] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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