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Singha T, Tomar S, Das S, Satpati B. D-Band Engineering in Pd-Based Nanowire Networks for Further Enhancement in Ethanol Electrooxidation Reaction. SMALL METHODS 2024:e2400368. [PMID: 38745535 DOI: 10.1002/smtd.202400368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/19/2024] [Indexed: 05/16/2024]
Abstract
The development of highly efficient electrocatalysts for the ethanol oxidation reaction (EOR) is essential for the commercialization of direct ethanol fuel cells, yet challenges remain. In this study, a one-pot solution-phase method to synthesize Pd nanowire networks (NNWs) with very high surface-to-volume ratio having numerous twin and grain boundaries is developed. Using the same method, the Pd lattice is further engineered by introducing Ag and Cu atoms to produce AgPd, and CuPd alloy structure which significantly shifts the Pd d-band center upward and downward, respectively due to strain and ligand effects. Theoretical analysis employing density functional theory (DFT) demonstrates that such modification of the d-band center significantly influences the adsorption energies of reactants on the catalytic surface. Owing to their notably high surface-to-volume ratio and the presence of multiple twin and grain boundaries, Pd NNWs demonstrate significantly enhanced electrocatalytic activity toward EOR, ≈7.2 times greater than that of commercial Pd/C. Remarkably, compared to Pd NNWs, AgPd, and CuPd NNWs display enlarged and reduced electrocatalytic activity toward EOR, respectively. Specifically, Ag4Pd7 NNWs achieve a remarkable mass activity of 9.00 A mgpd -1 for EOR, which is 13.6 times higher than commercial Pd/C.
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Affiliation(s)
- Tukai Singha
- Surface Physics & Material Science Division, Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, 1/AF Bidhannagar, Kolkata, 700064, India
| | - Shalini Tomar
- Indo-Korea Science and Technology Center (IKST), Bangalore, 560065, India
| | - Shuvankar Das
- Surface Physics & Material Science Division, Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, 1/AF Bidhannagar, Kolkata, 700064, India
| | - Biswarup Satpati
- Surface Physics & Material Science Division, Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, 1/AF Bidhannagar, Kolkata, 700064, India
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2
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Huynh TT, Huynh Q, Nguyen QV, Pham HQ. Lattice Strain and Composition Effects on the Methanol Oxidation Performance of Platinum-Ruthenium-Nickel Ternary Nanocatalysts. Inorg Chem 2023. [PMID: 37990435 DOI: 10.1021/acs.inorgchem.3c03518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Ternary Pt-based structures are a positive progress in addressing the disadvantages of monometallic and bimetallic Pt-based alloys for the electrochemical oxidation process of simple alcohols, which is a vital half-reaction in fuel cell technologies. We herein report a facile NaBH4-assisted ethylene glycol reduction process for fabricating a series of nanosized PtRuNi ternary alloys to explore the relationship between physicochemical properties and electrocatalytic behaviors for the acidic methanol oxidation reaction (MOR). Owing to a balance between lattice strain and synergistic effects, the Pt60Ru20Ni20/C electrocatalyst shows the highest MOR efficiency with the mass activity/specific activity of 844.48 mA mgMetal-1/1.93 mA cm-2, being a 1.94 and 2.38 times increase compared to those of the PtRu catalyst, respectively. Also, the Pt60Ru20Ni20/C catalyst possesses superior CO-tolerance and durability in strongly acidic electrolytes. This work suggests that optimizing the surface strain and electronic effects can boost the overall MOR efficiency of multicomponent Pt-based materials, which can help to further develop next-generation catalysts for energy conversion-related technologies.
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Affiliation(s)
- Tai Thien Huynh
- Ho Chi Minh City University of Natural Resources and Environment (HCMUNRE), Ho Chi Minh City 700000, Viet Nam
| | - Quyen Huynh
- Ho Chi Minh City University of Natural Resources and Environment (HCMUNRE), Ho Chi Minh City 700000, Viet Nam
| | - Qui Van Nguyen
- Ho Chi Minh City University of Natural Resources and Environment (HCMUNRE), Ho Chi Minh City 700000, Viet Nam
| | - Hau Quoc Pham
- Future Materials & Devices Lab., Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 700000, Viet Nam
- The Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang 550000, Viet Nam
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3
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Li S, Jin H, Wang Y. Recent progress on the synthesis of metal alloy nanowires as electrocatalysts. NANOSCALE 2023; 15:2488-2515. [PMID: 36722933 DOI: 10.1039/d2nr06090f] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Benefiting from both one-dimensional (1D) morphology and alloy composition, metal alloy nanowires have been exploited as advanced electrocatalysts in various electrochemical processes. In this review, the synthesis approaches for metal alloy nanowires are classified into two categories: direct syntheses and syntheses based on preformed 1D nanostructures. Ligand systems that are of critical importance to the formation of alloy nanowires are summarized and reviewed, together with the strategies imposed to achieve the co-reduction of different metals. Meanwhile, different scenarios that form alloy nanowires from pre-synthesized 1D nanostructures are compared and contrasted. In addition, the characterization and electrocatalytic applications of metal alloy nanowires are briefly discussed.
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Affiliation(s)
- Shumin Li
- Institute of Advanced Synthesis (IAS), Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P.R. China.
| | - Hui Jin
- Institute of Advanced Synthesis (IAS), Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P.R. China.
| | - Yawen Wang
- Institute of Advanced Synthesis (IAS), Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P.R. China.
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4
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Yang P, Zhou Z, Zheng T, Gu C, Gong X, Zhang Y, Xie Y, Yang N, Fei J. A novel strategy to synthesize Pt/CNTs nanocatalyst with highly improved activity for methanol electrooxidation. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115557] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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5
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Xu M, Wang F, Liang X, Shehzad MA, Wu L, Xu T. Poly (5-aminoindole)–modified TiO2NTs nanocomposites supported palladium as an anode catalyst for enhanced electrocatalytic oxidation of methanol. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138562] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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6
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Xie J, Yang H, Dong Q, Qin Q, Hu C, Yu G. Oxygen-rich PdSnCu nanocrystals with particle connection features as enhanced catalysts for ethanol oxidation reaction. NANOTECHNOLOGY 2021; 32:325704. [PMID: 33862606 DOI: 10.1088/1361-6528/abf8dc] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
Most electrocatalysts show a high mass and special activity during the ethanol oxidation reaction, but those still suffer from limited stability, finite renewable capability and poor anti-poisoning durability. Furthermore, the reliable structure and appropriate composition of catalysts are fairly associated with the electrocatalysis performance. Herein, we report the development of trimetallic Pd61Sn34Cu5nanocrystals (NCs) whose rough surfaces are rich in step atoms and coupled with abundant of SnOxand CuO, which may effectively boost reaction activity and rapidly remove carbonaceous intermediate, respectively. Under the tuning on the composition, the defect rich Pd61Sn34Cu5NCs exhibit elevated electrocatalysis activity and durability for ethanol oxidation reaction with an optimized mass activity (1.26 AmgPd-1) and specific activity (10.6 mA cm-2), which is about 2.21 and 2.58 times greater than that of the commercial Pd/C catalyst (0.57 AmgPd-1and 4.1 mA cm-2).
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Affiliation(s)
- Jian Xie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Hui Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Qizhi Dong
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Qian Qin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Chao Hu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Gang Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
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7
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Zhao G, Fang C, Hu J, Zhang D. Platinum-Based Electrocatalysts for Direct Alcohol Fuel Cells: Enhanced Performances toward Alcohol Oxidation Reactions. Chempluschem 2021; 86:574-586. [PMID: 33830678 DOI: 10.1002/cplu.202000811] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 03/20/2021] [Indexed: 12/28/2022]
Abstract
In the past few decades, Pt-based electrocatalysts have attracted great interests due to their high catalytic performances toward the direct alcohol fuel cell (DAFC). However, the high cost, poor stability, and the scarcity of Pt have markedly hindered their large-scale utilization in commerce. Therefore, enhancing the activity and durability of Pt-based electrocatalysts, reducing the Pt amount and thus the cost of DAFC have become the keys for their practical applications. In this minireview, we summarized some basic concepts to evaluate the catalytic performances in electrocatalytic alcohol oxidation reaction (AOR) including electrochemical active surface area, activity and stability, the effective approaches for boosting the catalytic AOR performance involving size decrease, structure and morphology modulation, composition effect, catalyst supports, and assistance under other external energies. Furthermore, we also presented the remaining challenges of the Pt-based electrocatalysts to achieve the fabrication of a real DAFC.
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Affiliation(s)
- Guili Zhao
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, P. R. China
| | - Caihong Fang
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, P. R. China
- Institute of Synthesis and Application of Medical Materials, Wannan Medical College, Wuhu, 241000, P. R. China
| | - Jinwu Hu
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, P. R. China
| | - Deliang Zhang
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, P. R. China
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8
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Qiao B, Yang T, Shi S, Jia N, Chen Y, Chen X, An Z, Chen P. Highly Active Hollow RhCu Nanoboxes toward Ethylene Glycol Electrooxidation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2006534. [PMID: 33590702 DOI: 10.1002/smll.202006534] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/04/2021] [Indexed: 06/12/2023]
Abstract
The efficient electrocatalysts toward the ethylene glycol oxidation reaction (EGOR) are highly desirable for direct ethylene glycol fuel cells because of the sluggish kinetics of anodic EGOR. Herein, porous RhCu nanoboxes are successfully prepared through facile galvanic replacement reaction and succedent sodium borohydride reduction strategy. Benefiting from hierarchical pore structure, RhCu nanoboxes display excellent electrocatalytic performance toward the EGOR in alkaline medium with a mass activity of 775.1 A gRh -1 , which is 2.8 times as large as that of commercial Rh nanocrystals. Moreover, the long-term stability of RhCu nanoboxes is better than that of commercial Rh nanocrystals. Furthermore, the theoretical calculations demonstrate that RhCu nanoboxes possess lower adsorption energy of CO and lower reaction barrier (0.27 eV) for the COads oxidation with aid of the adsorbed OHads species, resulting in the outstanding electrocatalytic performance toward the EGOR. This work provides a meaningful reference for developing highly effective electrocatalysts toward the EGOR.
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Affiliation(s)
- Bin Qiao
- Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Ting Yang
- Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Shufeng Shi
- Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Nan Jia
- Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Yu Chen
- Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Xinbing Chen
- Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Zhongwei An
- Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Pei Chen
- Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
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9
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ul Haq T, Bicer Y, Munir A, Mansour SA, Haik Y. Surface Assembling of Highly Interconnected and Vertically Aligned Porous Nanosheets of Gd−CoB on TiO
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Nanoflowers for Durable Methanol oxidation Reaction. ChemCatChem 2020. [DOI: 10.1002/cctc.202000392] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tanveer ul Haq
- College of Science and EngineeringHamad bin Khalifa University (HBKU)Qatar Foundation 34110 Doha Qatar
| | - Yusuf Bicer
- College of Science and EngineeringHamad bin Khalifa University (HBKU)Qatar Foundation 34110 Doha Qatar
| | - Akhtar Munir
- Department of Chemistry and Chemical EngineeringSBA School of Science and EngineeringLahore University of Management and Sciences (LUMS) DHA Lahore 54792 Pakistan
| | - Said A. Mansour
- Qatar Energy and Environment Research InstituteHamad bin Khalifa University (HBKU) Qatar Foundation 34110 Doha Qatar
| | - Yousef Haik
- College of Science and EngineeringHamad bin Khalifa University (HBKU)Qatar Foundation 34110 Doha Qatar
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10
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Song T, Gao F, Zhang Y, Chen C, Wang C, Li S, Shang H, Du Y. Efficient polyalcohol oxidation electrocatalysts enabled by PtM (M = Fe, Co, and Ni) nanocubes surrounded by (200) crystal facets. NANOSCALE 2020; 12:9842-9848. [PMID: 32342072 DOI: 10.1039/d0nr00163e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Due to the high-density (200) crystal planes and abundant active sites, cubic platinum nanomaterials have become outstanding electrocatalysts in promoting fuel cell reactions. However, because of the fact that the facet-controlled synthesis is difficult, it is still a grand challenge to synthesize a sequence of Pt-based nanocubes via a universal method. Herein, we report a general and simple eco-friendly solvothermal method to prepare (200)-enclosed PtM nanocubes. Different from the other nanomaterials, nanocubes are conducive to mass transfer. Moreover, the synergistic and electronic effects between M and Pt are profitable to improve the utilization of precious metals. We used (200)-encapsulated nanocrystals to evaluate their electrocatalytic performance towards glycerol and ethylene glycol oxidation reactions in an alkaline medium. In particular, Pt4Co nanocubes showed superior mass activities in glycerol and ethylene glycol oxidation reactions, which are 6.2- and 5.0-fold higher than those obtained for commercial Pt/C catalysts, respectively. Meanwhile, Pt4M catalysts manifested excellent stability in the endurance test, which is attributed to the alloying effect promoting the electrooxidation of intermediates. Our study provides an ideal method for the construction of Pt-based bimetallic nanocubes, which can be used for anode reactions of polyol fuel cells and beyond.
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Affiliation(s)
- Tongxin Song
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P.R. China.
| | - Fei Gao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P.R. China.
| | - Yangping Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P.R. China.
| | - Chunyan Chen
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P.R. China.
| | - Cheng Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P.R. China.
| | - Shujin Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P.R. China.
| | - Hongyuan Shang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P.R. China.
| | - Yukou Du
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P.R. China.
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11
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Wang H, Zhang K, Qiu J, Wu J, Shao J, Wang H, Zhang Y, Han J, Zhang Y, Yan L. Ternary PtFeCo alloys on graphene with high electrocatalytic activities for methanol oxidation. NANOSCALE 2020; 12:9824-9832. [PMID: 32338669 DOI: 10.1039/d0nr00757a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ternary PtFeCo alloys as alternatives to conventional Pt electrocatalysts are highly important in the field of the methanol oxidation reaction. In this study, we demonstrate a one-pot two-step reduction method for the synthesis of graphene supported PtFeCo alloy nanocomposites as an integrated binder-free catalyst. The synergistic effect of alloying with Fe and Co as well as graphene decorating contributes to an increase in the utilization of the noble metal, namely, reducing the amount of Pt in the nanocomposites to 7%. After tailoring the elemental composition of the alloys, Pt52Fe29Co19@G-7% exhibits a mass activity/specific activity of 1758.2 mA mg-1Pt/3.42 mA cm-2 that is 3.13/3.45 times that of commercial Pt/C in an acidic medium. Impressively, it showed a superior mass current density of 9356.1 mA mg-1Pt at 60 °C which is close to the operating temperature of direct methanol fuel cells. Moreover, the as-obtained Pt52Fe29Co19@G-7% also exhibited excellent CO tolerance and reliable stability compared to commercial Pt/C. The structural characterization further verifies that the surface strain and electronic effect play a critical role in determining the electrocatalytic properties of PtFeCo@G nanocomposites for the methanol oxidation reaction.
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Affiliation(s)
- Hongfei Wang
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemical Physics, iCHEM, University of Science and Technology of China, China.
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12
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Engineering 3D hierarchical thorn-like PtPdNiCu alloyed nanotripods with enhanced performances for methanol and ethanol electrooxidation. J Colloid Interface Sci 2020; 575:425-432. [PMID: 32402824 DOI: 10.1016/j.jcis.2020.04.120] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/17/2020] [Accepted: 04/27/2020] [Indexed: 01/28/2023]
Abstract
Developing efficient and stable electrocatalysts with three-dimensional (3D) hierarchical nanostructures is extremely important in practical applications of direct alcohol fuel cells. Herein, 3D hierarchical thorn-like multi-metallic PtPdNiCu alloyed nanotripods (PtPdNiCu TNTPs) were efficiently fabricated by a one-pot aqueous method, in which Pluronic F127 performed as the structure-director and dispersing agent. The as-prepared PtPdNiCu TNTPs exhibited distinct electrocatalytic activity for methanol oxidation reaction (MOR) with a mass activity (MA) of 1.465 A mg-1Pd, which is superior to commercial Pt/C (0.925 A mg-1Pd) in 1.0 M KOH solution, along with the greater MA (1.019 A mg-1Pd) for ethanol oxidation reaction (EOR) than Pt/C (0.712 A mg-1Pd). This work would provide an impetus for rationally constructing multimetal nanomaterials to commercial implementation of advanced alcohol fuel cells.
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13
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Hollow PtCu octahedral nanoalloys: Efficient bifunctional electrocatalysts towards oxygen reduction reaction and methanol oxidation reaction by regulating near-surface composition. J Colloid Interface Sci 2020; 562:244-251. [DOI: 10.1016/j.jcis.2019.12.020] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 12/05/2019] [Accepted: 12/05/2019] [Indexed: 11/23/2022]
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14
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Li M, Wang Y, Cai J, Li Y, Liu Y, Dong Y, Li S, Yuan X, Zhang X, Dai X. Surface sites assembled-strategy on Pt–Ru nanowires for accelerated methanol oxidation. Dalton Trans 2020; 49:13999-14008. [DOI: 10.1039/d0dt02567d] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Isolated Ru atoms activate more Pt atoms involved in the Langmuir–Hinshelwood (L–H) pathway, which collectively accelerate methanol oxidation.
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