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Shao RY, Niu X, Xu XC, Zhou ZH, Chu S, Tong L, Zhang L, Liang HW. Enhancing Surface Strain of Intermetallic Fuel Cell Catalysts by Composition-Induced Phase Transition. NANO LETTERS 2024; 24:5578-5584. [PMID: 38682925 DOI: 10.1021/acs.nanolett.4c00898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
The lattice parameter of platinum-based intermetallic compounds (IMCs), which correlates with the intrinsic activity of the oxygen reduction reaction (ORR), can be modulated by crystal phase engineering. However, the controlled preparation of IMCs with unconventional crystal structures remains highly challenging. Here, we demonstrate the synthesis of carbon-supported PtCu-based IMC catalysts with an unconventional L10 structure by a composition-regulated strategy. Experiment and machine learning reveal that the thermodynamically favorable structure changes from L11 to L10 when slight Cu atoms are substituted with Co. Benefiting from crystal-phase-induced strain enhancement, the prepared L10-type PtCu0.8Co0.2 catalyst exhibits much-enhanced mass and specific activities of 1.82 A mgPt-1 and 3.27 mA cmPt-2, which are 1.91 and 1.73 times higher than those of the L11-type PtCu catalyst, respectively. Our work highlights the important role of crystal phase in determining the surface strain of IMCs, and opens a promising avenue for the rational preparation of IMCs with different crystal phases by doping.
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Affiliation(s)
- Ru-Yang Shao
- Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Xiangfu Niu
- Center for Combustion Energy School of Vehicle and Mobility, Tsinghua University, Beijing 100084, People's Republic of China
- Beijing Huairou Laboratory, Beijing 101400, People's Republic of China
| | - Xiao-Chu Xu
- Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Zhen-Hua Zhou
- Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Shengqi Chu
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Lei Tong
- Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Liang Zhang
- Center for Combustion Energy School of Vehicle and Mobility, Tsinghua University, Beijing 100084, People's Republic of China
- Beijing Huairou Laboratory, Beijing 101400, People's Republic of China
| | - Hai-Wei Liang
- Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China
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2
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Wang J, Ye J, Chen S, Zhang Q. Strain Engineering of Unconventional Crystal-Phase Noble Metal Nanocatalysts. Molecules 2024; 29:1617. [PMID: 38611896 PMCID: PMC11013576 DOI: 10.3390/molecules29071617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/06/2023] [Accepted: 12/12/2023] [Indexed: 04/14/2024] Open
Abstract
The crystal phase, alongside the composition, morphology, architecture, facet, size, and dimensionality, has been recognized as a critical factor influencing the properties of noble metal nanomaterials in various applications. In particular, unconventional crystal phases can potentially enable fascinating properties in noble metal nanomaterials. Recent years have witnessed notable advances in the phase engineering of nanomaterials (PEN). Within the accessible strategies for phase engineering, the effect of strain cannot be ignored because strain can act not only as the driving force of phase transition but also as the origin of the diverse physicochemical properties of the unconventional crystal phase. In this review, we highlight the development of unconventional crystal-phase noble metal nanomaterials within strain engineering. We begin with a short introduction of the unconventional crystal phase and strain effect in noble metal nanomaterials. Next, the correlations of the structure and performance of strain-engineered unconventional crystal-phase noble metal nanomaterials in electrocatalysis are highlighted, as well as the phase transitions of noble metal nanomaterials induced by the strain effect. Lastly, the challenges and opportunities within this rapidly developing field (i.e., the strain engineering of unconventional crystal-phase noble metal nanocatalysts) are discussed.
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Affiliation(s)
- Jie Wang
- Key Laboratory of Fluid and Power Machinery of Ministry of Education, School of Materials Science and Engineering, Xihua University, Chengdu 610039, China
| | | | | | - Qinyong Zhang
- Key Laboratory of Fluid and Power Machinery of Ministry of Education, School of Materials Science and Engineering, Xihua University, Chengdu 610039, China
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3
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Lin F, Li M, Zeng L, Luo M, Guo S. Intermetallic Nanocrystals for Fuel-Cells-Based Electrocatalysis. Chem Rev 2023; 123:12507-12593. [PMID: 37910391 DOI: 10.1021/acs.chemrev.3c00382] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
Electrocatalysis underpins the renewable electrochemical conversions for sustainability, which further replies on metallic nanocrystals as vital electrocatalysts. Intermetallic nanocrystals have been known to show distinct properties compared to their disordered counterparts, and been long explored for functional improvements. Tremendous progresses have been made in the past few years, with notable trend of more precise engineering down to an atomic level and the investigation transferring into more practical membrane electrode assembly (MEA), which motivates this timely review. After addressing the basic thermodynamic and kinetic fundamentals, we discuss classic and latest synthetic strategies that enable not only the formation of intermetallic phase but also the rational control of other catalysis-determinant structural parameters, such as size and morphology. We also demonstrate the emerging intermetallic nanomaterials for potentially further advancement in energy electrocatalysis. Then, we discuss the state-of-the-art characterizations and representative intermetallic electrocatalysts with emphasis on oxygen reduction reaction evaluated in a MEA setup. We summarize this review by laying out existing challenges and offering perspective on future research directions toward practicing intermetallic electrocatalysts for energy conversions.
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Affiliation(s)
- Fangxu Lin
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
- Beijing Innovation Centre for Engineering Science and Advanced Technology, Peking University, Beijing 100871, China
| | - Menggang Li
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Lingyou Zeng
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Mingchuan Luo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Shaojun Guo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
- Beijing Innovation Centre for Engineering Science and Advanced Technology, Peking University, Beijing 100871, China
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4
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Lim C, Fairhurst AR, Ransom BJ, Haering D, Stamenkovic VR. Role of Transition Metals in Pt Alloy Catalysts for the Oxygen Reduction Reaction. ACS Catal 2023; 13:14874-14893. [PMID: 38026811 PMCID: PMC10660348 DOI: 10.1021/acscatal.3c03321] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/26/2023] [Accepted: 10/03/2023] [Indexed: 12/01/2023]
Abstract
In pursuit of higher activity and stability of electrocatalysts toward the oxygen reduction reaction, it has become standard practice to alloy platinum in various structural configurations. Transition metals have been extensively studied for their ability to tune catalyst functionality through strain, ligand, and ensemble effects. The origin of these effects and potential for synergistic application in practical materials have been the subject of many theoretical and experimental analyses in recent years. Here, a comprehensive overview of these phenomena is provided regarding the impact on reaction mechanisms and kinetics through combined experimental and theoretical approaches. Experimental approaches to electrocatalysis are discussed.
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Affiliation(s)
- Chaewon Lim
- Department
of Chemical & Biomolecular Engineering, University of California, Irvine, California 92697, United States
- HORIBA
Institute for Mobility and Connectivity, University of California, Irvine, California 92697, United States
| | - Alasdair R. Fairhurst
- Department
of Chemical & Biomolecular Engineering, University of California, Irvine, California 92697, United States
- HORIBA
Institute for Mobility and Connectivity, University of California, Irvine, California 92697, United States
| | - Benjamin J. Ransom
- Department
of Chemical & Biomolecular Engineering, University of California, Irvine, California 92697, United States
- HORIBA
Institute for Mobility and Connectivity, University of California, Irvine, California 92697, United States
| | - Dominik Haering
- Department
of Chemical & Biomolecular Engineering, University of California, Irvine, California 92697, United States
- HORIBA
Institute for Mobility and Connectivity, University of California, Irvine, California 92697, United States
| | - Vojislav R. Stamenkovic
- Department
of Chemical & Biomolecular Engineering, University of California, Irvine, California 92697, United States
- HORIBA
Institute for Mobility and Connectivity, University of California, Irvine, California 92697, United States
- Department
of Chemistry, University of California, Irvine, California 92697, United States
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5
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Liu X, Liang J, Li Q. Design principle and synthetic approach of intermetallic Pt-M alloy oxygen reduction catalysts for fuel cells. CHINESE JOURNAL OF CATALYSIS 2023. [DOI: 10.1016/s1872-2067(22)64165-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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6
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Methodical designing of Pt3-xCo0.5+yNi0.5+y/C (x=0, 1, 2; y=0, 0.5, 1) particles using a single-step solid state chemistry method as efficient cathode catalyst in H2-O2 fuel cells. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.11.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Acquaye FY, Roberts A, Street S. Effect of Crystal Growth on the Thermodynamic Stability and Oxygen Reduction Reaction Activity of Cu-Pt Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10621-10631. [PMID: 35969848 DOI: 10.1021/acs.langmuir.2c01594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Thermodynamically stable (ordered) platinum-based bimetallic nanoparticle (NP) catalysts are auspicious candidates for catalyzing the oxygen reduction reaction (ORR) in fuel cells. Although the cubic (L12) and tetragonal (L10) ordered phases have been extensively studied, very little is known about the cubic (D7) thermally stable/ordered CuPt7 with regard to its synthesis at room temperature and ORR activity. The typical synthetic approach to the ordered phase (L12 and L10) has been by thermal annealing of the disordered phase in an inert atmosphere. We demonstrate that by coordinating Cu2+ and Pt4+ ions to amino groups in aqueous polyethyleneimine (PEI) (precursor solution), slow crystal growth by a UV-light assisted photoreduction can be used to achieve ordered CuPt7 NPs at room temperature. Slow crystal growth produces a relatively expanded lattice (7.766 Å) of CuPt7 and a lesser ORR activity via a four-electron transfer pathway. Conversely, fast crystal growth through a NaBH4 assisted chemical reduction produces a disordered CuPt phase at room temperature and a contracted lattice (3.809 Å) that enhances the ORR activity of CuPt via a two-electron transfer pathway. Our comparative observations of CuPt and CuPt7 support the observation that lattice contraction is critical in the ORR activity of Cu-Pt nanoalloys.
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Affiliation(s)
- Francis Y Acquaye
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Anne Roberts
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Shane Street
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
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8
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Abstract
ConspectusProton-exchange membrane fuel cells (PEMFCs) are highly efficient energy storage and conversion devices. Thus, the platinum group metal (PGM)-based catalysts which are the dominant choice for the PEMFCs have received extensive interest during the past couple of decades. However, the drawbacks in the existing PGM-based catalysts (i.e., high cost, slow kinetics, poor stability, etc.) still limit their applications in fuel cells. The Pt-based core-shell catalysts potentially alleviate these issues through the low Pt loading with the associated low cost and the high corrosion resistance and further improve the oxygen reduction reaction's (ORR's) activity and stability. This Account focuses on the synthetic strategies, catalytic mechanisms, factors influencing enhanced ORR performance, and applications in PEMFCs for the Pt-based core-shell catalysts. We first highlight the synthetic strategies for Pt-based core-shell catalysts including the galvanic displacement of an underpotentially deposited non-noble metal monolayer, thermal annealing, and dealloying methods, which can be scaled-up to meet the requirements of fuel cell operations. Subsequently, catalytic mechanisms such as the self-healing mechanism in the Pt monolayer on Pd core catalysts, the pinning effect of nitrogen (N) dopants in N-doped PtNi core-shell catalysts, and the ligand effect of the ordered intermetallic structure in L10-Pt/CoPt core-shell catalysts and their synergistic effects in N-doped L10-PtNi catalysts are described in detail. The core-shell structure in the Pt-based catalysts have two main effects for enhanced ORR performance: (i) the interaction between Pt shells and core substrates can tune the electronic state of the surface Pt, thus boosting the ORR activity and stability, and (ii) the outer Pt shell with modest thickness can enhance the oxidation and dissolution resistance of the core, resulting in improved durability. We then review the recent attempts to optimize the ORR performance of the Pt-based core-shell catalysts by considering the shape, composition, surface orientation, and shell thickness. The factors influencing the ORR performance can be grouped into two categories: the effect of the core and the effect of the shell. In the former, PtM core-shell catalysts which use different non-PGM element cores (M) are summarized, and in the latter, Pt-based core-shell catalysts with different shell structures and compositions are described. The modifications of the core and/or shell structure can not only optimize the intermediate-binding energetics on the Pt surface through tuning the strain of the surface Pt, which increases the intrinsic activity and stability, but also offer a significantly decreased catalyst cost. Finally, we discuss the membrane electrode assembly performance of Pt-based core-shell catalysts in fuel cell cathodes and evaluate their potential in real PEMFCs for light-duty and heavy-duty vehicle applications. Even though some challenges to the activity and lifetime in the fuel cells remain, the Pt-based core-shell catalysts are expected to be promising for many practical PEMFC applications.
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Affiliation(s)
- Xueru Zhao
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Kotaro Sasaki
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
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9
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PtCo-Based nanocatalyst for oxygen reduction reaction: Recent highlights on synthesis strategy and catalytic mechanism. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.03.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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10
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Pt-Based Intermetallic Nanocrystals in Cathode Catalysts for Proton Exchange Membrane Fuel Cells: From Precise Synthesis to Oxygen Reduction Reaction Strategy. Catalysts 2021. [DOI: 10.3390/catal11091050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Although oxygen reduction reaction (ORR) catalysts have been extensively investigated and developed, there is a lack of clarity on catalysts that can balance high performance and low cost. Pt-based intermetallic nanocrystals are of special interest in the commercialization of proton exchange membrane fuel cells (PEMFCs) due to their excellent ORR activity and stability. This review summarizes the wide range of applications of Pt-based intermetallic nanocrystals in cathode catalysts for PEMFCs and their unique advantages in the field of ORR. Firstly, we introduce the fundamental understanding of Pt-based intermetallic nanocrystals, and highlight the difficulties and countermeasures in their synthesis. Then, the progress of theoretical and experimental studies related to the ORR activity and stability of Pt-based intermetallic nanocrystals in recent years are reviewed, especially the integrated strategies for enhancing the stability of ORR. Finally, the challenges faced by Pt-based intermetallic nanocrystals are summarized and future research directions are proposed. In addition, numerous design ideas of Pt-based intermetallic nanocrystals as ORR catalysts are summarized, aiming to promote further development of commercialization of PEMFC catalysts while fully understanding Pt-based intermetallic nanocrystals.
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11
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Kim HY, Kim JY, Joo SH. Pt‐based
Intermetallic Nanocatalysts for Promoting the Oxygen Reduction Reaction. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12274] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Ho Young Kim
- Center for Hydrogen and Fuel Cell Research Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea
| | - Jin Young Kim
- Center for Hydrogen and Fuel Cell Research Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea
| | - Sang Hoon Joo
- Department of Chemistry Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
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12
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Zhao X, Cheng H, Song L, Han L, Zhang R, Kwon G, Ma L, Ehrlich SN, Frenkel AI, Yang J, Sasaki K, Xin HL. Rhombohedral Ordered Intermetallic Nanocatalyst Boosts the Oxygen Reduction Reaction. ACS Catal 2020. [DOI: 10.1021/acscatal.0c04021] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xueru Zhao
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
- Institute of New-Energy Materials, Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Hao Cheng
- Department of Physics and Astronomy, University of California Irvine, Irvine, California 92697, United States
| | - Liang Song
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Lili Han
- Department of Physics and Astronomy, University of California Irvine, Irvine, California 92697, United States
| | - Rui Zhang
- Department of Physics and Astronomy, University of California Irvine, Irvine, California 92697, United States
| | - Gihan Kwon
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Lu Ma
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Steven N. Ehrlich
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Anatoly I. Frenkel
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Jing Yang
- Institute of New-Energy Materials, Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Kotaro Sasaki
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Huolin L. Xin
- Department of Physics and Astronomy, University of California Irvine, Irvine, California 92697, United States
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13
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Li J, Sharma S, Wei K, Chen Z, Morris D, Lin H, Zeng C, Chi M, Yin Z, Muzzio M, Shen M, Zhang P, Peterson AA, Sun S. Anisotropic Strain Tuning of L10 Ternary Nanoparticles for Oxygen Reduction. J Am Chem Soc 2020; 142:19209-19216. [DOI: 10.1021/jacs.0c08962] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Junrui Li
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Shubham Sharma
- School of Engineering, Brown University, Providence, Rhode Island 02912, United States
| | - Kecheng Wei
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Zitao Chen
- Center for Nanophase Materials Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | - David Morris
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Honghong Lin
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Cheng Zeng
- School of Engineering, Brown University, Providence, Rhode Island 02912, United States
| | - Miaofang Chi
- Center for Nanophase Materials Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Zhouyang Yin
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Michelle Muzzio
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Mengqi Shen
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Peng Zhang
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Andrew A. Peterson
- School of Engineering, Brown University, Providence, Rhode Island 02912, United States
| | - Shouheng Sun
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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14
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Wu T, Sun M, Huang B. Probing the Irregular Lattice Strain-Induced Electronic Structure Variations on Late Transition Metals for Boosting the Electrocatalyst Activity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002434. [PMID: 32815291 DOI: 10.1002/smll.202002434] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 07/08/2020] [Indexed: 06/11/2023]
Abstract
Owing to the simplicity in practice and continuous fine-tuning ability toward the binding strengths of adsorbates, the strain effect is intensively explored, especially focused on the modulation of catalytic activity in transition metal (TM) based electrocatalysts. Recently, more and more abnormal cases have been found that cannot be explained by the conventional simplified models. In this work, the strain effects in five late TMs, Fe, Co, Ni, Pd, and Pt are studied in-depth regarding the facet engineering, the surface atom density, and the d-band center. Interestingly, the irregular response of Fe lattice to the applied strain is identified, indicating the untapped potential of achieving the phase change by precise strain modulation. For the complicated high-index facets, the surface atom density has become the pivotal factor in determining the surface stability and electroactivity, which identifies the potential of high entropy alloys (HEA) in electrocatalysis. The work supplies insightful understanding and significant references for future research in subtle modulation of electroactivity based on the precise facet engineering in the more complex facets and morphologies.
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Affiliation(s)
- Tong Wu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, 999077, China
| | - Mingzi Sun
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, 999077, China
| | - Bolong Huang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, 999077, China
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15
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Zhao X, Xi C, Zhang R, Song L, Wang C, Spendelow JS, Frenkel AI, Yang J, Xin HL, Sasaki K. High-Performance Nitrogen-Doped Intermetallic PtNi Catalyst for the Oxygen Reduction Reaction. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03036] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xueru Zhao
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
- Institute of New-Energy Materials, Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Cong Xi
- Institute of New-Energy Materials, Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Rui Zhang
- Department of Physics and Astronomy, University of California, Irvine, California 92697, United States
| | - Liang Song
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Chenyu Wang
- Materials Physics and Application Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Jacob S. Spendelow
- Materials Physics and Application Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Anatoly I. Frenkel
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Jing Yang
- Institute of New-Energy Materials, Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Huolin L. Xin
- Department of Physics and Astronomy, University of California, Irvine, California 92697, United States
| | - Kotaro Sasaki
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
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16
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Ashberry HM, Gamler JTL, Unocic RR, Skrabalak SE. Disorder-to-Order Transition Mediated by Size Refocusing: A Route toward Monodisperse Intermetallic Nanoparticles. NANO LETTERS 2019; 19:6418-6423. [PMID: 31430166 DOI: 10.1021/acs.nanolett.9b02610] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Intermetallic nanoparticles are remarkable due to their often enhanced catalytic, magnetic, and optical properties, which arise from their ordered crystal structures and high structural stability. Typical syntheses of intermetallic nanoparticles include thermal annealing of the disordered counterpart in atmosphere (or vacuum) or colloidal syntheses, where the phase transformation is achieved in solution. Although both methods can produce intermetallic nanoparticles, there is difficulty in achieving monodisperse nanoparticles, which is critical to exploiting their properties for various applications. Here, we show that overgrowth on random alloy AuCu nanoparticles mediated by size refocusing yields monodisperse intermetallic AuCu nanoparticles. Size refocusing has been used in syntheses of semiconductor and upconverting nanocrystals to achieve monodisperse samples, but now we demonstrate size refocusing as a mechanism to achieve the disorder-to-order phase transformation in multimetallic nanoparticles. The phase transformation was monitored by time evolution experiments, where analysis of reaction aliquots with transmission electron microscopy and powder X-ray diffraction revealed the generation and dissolution of small nanoparticles coupled with an increase in the average size of the nanoparticles and conversion to the ordered phase. This demonstration advances the understanding of intermetallic nanoparticle formation in colloidal syntheses, which can expedite the development of electrocatalysts and magnetic storage materials.
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Affiliation(s)
- Hannah M Ashberry
- Department of Chemistry , Indiana University , 800 East Kirkwood Avenue , Bloomington , Indiana 47405 , United States
| | - Jocelyn T L Gamler
- Department of Chemistry , Indiana University , 800 East Kirkwood Avenue , Bloomington , Indiana 47405 , United States
| | - Raymond R Unocic
- Center for Nanophase Materials Sciences , Oak Ridge National Laboratory , One Bethel Valley Road , Oak Ridge , Tennessee 37831 , United States
| | - Sara E Skrabalak
- Department of Chemistry , Indiana University , 800 East Kirkwood Avenue , Bloomington , Indiana 47405 , United States
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