1
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Talukdar B, Kuo TC, Sneed BT, Lyu LM, Lin HM, Chuang YC, Cheng MJ, Kuo CH. Enhancement of NH 3 Production in Electrochemical N 2 Reduction by the Cu-Rich Inner Surfaces of Beveled CuAu Nanoboxes. ACS Appl Mater Interfaces 2021; 13:51839-51848. [PMID: 33845573 DOI: 10.1021/acsami.1c03454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The global ammonia yield is critical to the fertilizer industry as the global food demand is highly dependent on it, whereas, NH3 is also a key chemical for pharmaceutical, textile, plastic, explosive, and dye-making industries. At present, the demand for NH3 is fulfilled by the Haber-Bosch method, which consumes 1-3% of global energy and causes 0.5-1% CO2 emission every year. To reduce emissions and improve energy efficiency, the electrochemical nitrogen gas reduction reaction (N2RR) has received much attention and support after the funding announcement by the U.S. Department of Energy. In this work, we have created hollow CuAu nanoboxes with Cu-rich inner walls to improve the NH3 Faradaic efficiency in N2RR. These beveled nanoboxes are produced in different degrees of corner and edge etching, which produces both polyhedral and concave structures. In N2RR, the binary CuAu nanoboxes enhanced NH3 production compared to individual Au and Cu nanocubes. The results of DFT calculations suggest the Cu-rich inner walls in the hollow beveled CuAu nanoboxes play a major role in their performance by reducing the free energy ΔG*NNH for the potential-determining step to form *NNH (* + N2(g) + H+ + e- → *NNH). Meanwhile, the results in 10-cycle and solar-illuminated N2RR indicate the beveled CuAu nanoboxes are not only robust electrocatalysts but show promise in photocatalysis as well.
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Affiliation(s)
- Biva Talukdar
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Sustainable Chemical Science and Technology, Taiwan International Graduate Program, Academia Sinica and National Yang Ming Chiao Tung University, Taipei 11529, Taiwan
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Tung-Chun Kuo
- Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan
| | - Brian T Sneed
- Cabot Microelectronics, Aurora, Illinois 60504, United States
| | - Lian-Ming Lyu
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hung-Min Lin
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Chun Chuang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Mu-Jeng Cheng
- Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chun-Hong Kuo
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Institute of Materials Science and Engineering, National Central University, Taoyuan 32001, Taiwan
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2
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Williams BP, Lo WS, Morabito JV, Young AP, Tsung F, Kuo CH, Palomba JM, Rayder TM, Chou LY, Sneed BT, Liu XY, Lamontagne LK, Petroff CA, Brodsky CN, Yang J, Andoni I, Li Y, Zhang F, Li Z, Chen SY, Gallacher C, Li B, Tsung SY, Pu MH, Tsung CK. Tailoring Heterogeneous Catalysts at the Atomic Level: In Memoriam, Prof. Chia-Kuang (Frank) Tsung. ACS Appl Mater Interfaces 2021; 13:51809-51828. [PMID: 34310110 DOI: 10.1021/acsami.1c08916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Professor Chia-Kuang (Frank) Tsung made his scientific impact primarily through the atomic-level design of nanoscale materials for application in heterogeneous catalysis. He approached this challenge from two directions: above and below the material surface. Below the surface, Prof. Tsung synthesized finely controlled nanoparticles, primarily of noble metals and metal oxides, tailoring their composition and surface structure for efficient catalysis. Above the surface, he was among the first to leverage the tunability and stability of metal-organic frameworks (MOFs) to improve heterogeneous, molecular, and biocatalysts. This article, written by his former students, seeks first to commemorate Prof. Tsung's scientific accomplishments in three parts: (1) rationally designing nanocrystal surfaces to promote catalytic activity; (2) encapsulating nanocrystals in MOFs to improve catalyst selectivity; and (3) tuning the host-guest interaction between MOFs and guest molecules to inhibit catalyst degradation. The subsequent discussion focuses on building on the foundation laid by Prof. Tsung and on his considerable influence on his former group members and collaborators, both inside and outside of the lab.
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Affiliation(s)
- Benjamin P Williams
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Wei-Shang Lo
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Joseph V Morabito
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Allison P Young
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Frances Tsung
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Chun-Hong Kuo
- Institute of Chemistry, Academia Sinica, No. 128, Section 2, Academia Rd, Nangang District, Taipei City, Taiwan 115
| | - Joseph M Palomba
- U.S. Army DEVCOM Soldier Center, 10 General Greene Avenue, Natick, Massachusetts 01760, United States
| | - Thomas M Rayder
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Lien-Yang Chou
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, P. R. China
| | - Brian T Sneed
- CMC Materials, 870 North Commons Drive, Aurora, Illinois 60504, United States
| | - Xiao-Yuan Liu
- Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic, 7098 Liuxian Boulevard, Nanshan District, Shenzhen 518055, P. R. China
| | - Leo K Lamontagne
- SecureSeniorConnections, 7114 East Stetson Drive, Scottsdale, Arizona 85251, United States
| | - Christopher A Petroff
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Casey N Brodsky
- University of Michigan Medical School, 7300 Medical Sciences Building I-A Wing, 1301 Catherine Street, Ann Arbor, Michigan 48109, United States
| | - Jane Yang
- Department of Chemistry and Biochemistry, University of California Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Ilektra Andoni
- Department of Chemistry, University of California Irvine, 1102 Natural Sciences 2, Irvine, California 92697-2025, United States
| | - Yang Li
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Furui Zhang
- Department of Chemistry and the Institute for Catalysis in Energy Processes, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Zhehui Li
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Sheng-Yu Chen
- Institute of Chemistry, Academia Sinica, No. 128, Section 2, Academia Rd, Nangang District, Taipei City, Taiwan 115
| | - Connor Gallacher
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Banruo Li
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Sheng-Yuan Tsung
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Ming-Hwa Pu
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Chia-Kuang Tsung
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
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3
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Williams BP, Yaguchi M, Lo WS, Kao CR, Lamontagne LK, Sneed BT, Brodsky CN, Chou LY, Kuo CH, Tsung CK. Investigating lattice strain impact on the alloyed surface of small Au@PdPt core-shell nanoparticles. Nanoscale 2020; 12:8687-8692. [PMID: 32267279 DOI: 10.1039/d0nr01021a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We investigated lattice strain on alloyed surfaces using ∼10 nm core-shell nanoparticles with controlled size, shape, and composition. We developed a wet-chemistry method for synthesizing small octahedral PdPt alloy nanoparticles and Au@PdPt core-shell nanoparticles with Pd-Pt alloy shells and Au cores. Upon introduction of the Au core, the size and shape of the overall nanostructure and the composition of the alloyed PdPt were maintained, enabling the use of the electrooxidation of formic acid as a probe to compare the surface structures with different lattice strain. We have found that the structure of the alloyed surface is indeed impacted by the lattice strain generated by the Au core. To further reveal the impact of lattice strain, we fine-tuned the shell thickness. Then, we used synchrotron-based X-ray diffraction to investigate the degree of lattice strain and compared the observations with the results of the formic acid electrooxidation, suggesting that there is an optimal intermediate shell thickness for high catalytic activity.
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Affiliation(s)
- Benjamin P Williams
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, USA.
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4
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Patlolla SR, Kao CR, Chen GW, Huang YC, Chuang YC, Sneed BT, Chou WC, Ong TG, Dong CL, Kuo CH. Au-BINOL Hybrid Nanocatalysts: Insights into the Structure-Based Enhancement of Catalytic and Photocatalytic Performance. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b06489] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shashank Reddy Patlolla
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Sustainable Chemical Science and Technology, Taiwan International Graduate Program, Academia Sinica and National Chiao Tung University, Taipei 11529, Taiwan
| | - Chen-Rui Kao
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Guan-Wei Chen
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 30013, Taiwan
| | | | - Yu-Chun Chuang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Brian T. Sneed
- Cabot Microelectronics, Aurora, Illinois 60504, United States
| | | | - Tiow-Gan Ong
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Chung-Li Dong
- Department of Physics, Tamkang University, New Taipei 25137, Taiwan
| | - Chun-Hong Kuo
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Institute of Materials Science and Engineering, National Central University, Jhongli 32001, Taiwan
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5
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Patlolla SR, Kao CR, Yeh AH, Lin HM, Chuang YC, Wen YS, Sneed BT, Chen WC, Ong TG, Kuo CH. Interface-Controlled Synthesis of Au-BINOL Hybrid Nanostructures and Mechanism Study. Langmuir 2018; 34:13697-13704. [PMID: 30343577 DOI: 10.1021/acs.langmuir.8b02857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The combined functionality of components in organic-inorganic hybrid nanomaterials render them efficient nanoreactors. However, the development in this field is limited due to a lack of synthetic avenues and systematic control of the growth kinetics of hybrid structures. In this work, we take advantage of an ionic switch for regio-control of Au-BINOL(1,1'-Bi-2-naphthol) hybrid nanostructures. Aromatic BINOL molecules assemble into nanospheres, concomitant with the growth of the Au nanocrystals. The morphological evolution of Au nanocrystals is solely controlled by the presence of halides in the synthetic system. Here we show that quaternary ammonium surfactants (CTAB or CTAC), not only bridging Au and BINOL, but also contributing to the formation of concentric or eccentric structures when their concentrations are tuned to the range of 10-5 to 10-3 M. This facile strategy offers the potential advantage of scalable production, with diverse functional organic-inorganic hybrid nanocomposites being produced based on the specific archetype of Au-BINOL hybrid nanocomposites.
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Affiliation(s)
- Shashank Reddy Patlolla
- Institute of Chemistry , Academia Sinica , Taipei 11529 , Taiwan
- Sustainable Chemical Science and Technology, Taiwan International Graduate Program , Academia Sinica and National Chiao Tung University , Taipei 11529 , Taiwan
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30010 , Taiwan
| | - Chen-Rui Kao
- Institute of Chemistry , Academia Sinica , Taipei 11529 , Taiwan
| | - Ai-Hsuan Yeh
- Institute of Chemistry , Academia Sinica , Taipei 11529 , Taiwan
| | - Hung-Min Lin
- Institute of Chemistry , Academia Sinica , Taipei 11529 , Taiwan
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Yu-Chun Chuang
- National Synchrotron Radiation Research Center , Hsinchu 30076 , Taiwan
| | - Yuh-Sheng Wen
- Institute of Chemistry , Academia Sinica , Taipei 11529 , Taiwan
| | - Brian T Sneed
- Cabot Microelectronics , Aurora , Illinois 60504 , United States
| | - Wen-Ching Chen
- Institute of Chemistry , Academia Sinica , Taipei 11529 , Taiwan
| | - Tiow-Gan Ong
- Institute of Chemistry , Academia Sinica , Taipei 11529 , Taiwan
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30010 , Taiwan
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Chun-Hong Kuo
- Institute of Chemistry , Academia Sinica , Taipei 11529 , Taiwan
- Institute of Materials Science and Engineering , National Central University , Jhongli 32001 , Taiwan
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6
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Ma Y, Li D, Herzing AA, Cullen DA, Sneed BT, More KL, Nuhfer NT, Bain JA, Skowronski M. Formation of the Conducting Filament in TaO x-Resistive Switching Devices by Thermal-Gradient-Induced Cation Accumulation. ACS Appl Mater Interfaces 2018; 10:23187-23197. [PMID: 29912544 DOI: 10.1021/acsami.8b03726] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The distribution of tantalum and oxygen ions in electroformed and/or switched TaO x-based resistive switching devices has been assessed by high-angle annular dark-field microscopy, X-ray energy-dispersive spectroscopy, and electron energy-loss spectroscopy. The experiments have been performed in the plan-view geometry on the cross-bar devices producing elemental distribution maps in the direction perpendicular to the electric field. The maps revealed an accumulation of +20% Ta in the inner part of the filament with a 3.5% Ta-depleted ring around it. The diameter of the entire structure was approximately 100 nm. The distribution of oxygen was uniform with changes, if any, below the detection limit of 5%. We interpret the elemental segregation as due to diffusion driven by the temperature gradient, which in turn is induced by the spontaneous current constriction associated with the negative differential resistance-type I- V characteristics of the as-fabricated metal/oxide/metal structures. A finite-element model was used to evaluate the distribution of temperature in the devices and correlated with the elemental maps. In addition, a fine-scale (∼5 nm) intensity contrast was observed within the filament and interpreted as due phase separation of the functional oxide in the two-phase composition region. Understanding the temperature-gradient-induced phenomena is central to the engineering of oxide memory cells.
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Affiliation(s)
| | | | - Andrew A Herzing
- National Institute of Standards and Technology , Gaithersburg , Maryland 20899 , United States
| | - David A Cullen
- Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Brian T Sneed
- Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Karren L More
- Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
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7
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Chung HT, Cullen DA, Higgins D, Sneed BT, Holby EF, More KL, Zelenay P. Direct atomic-level insight into the active sites of a high-performance PGM-free ORR catalyst. Science 2018; 357:479-484. [PMID: 28774924 DOI: 10.1126/science.aan2255] [Citation(s) in RCA: 580] [Impact Index Per Article: 96.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 07/06/2017] [Indexed: 01/21/2023]
Abstract
Platinum group metal-free (PGM-free) metal-nitrogen-carbon catalysts have emerged as a promising alternative to their costly platinum (Pt)-based counterparts in polymer electrolyte fuel cells (PEFCs) but still face some major challenges, including (i) the identification of the most relevant catalytic site for the oxygen reduction reaction (ORR) and (ii) demonstration of competitive PEFC performance under automotive-application conditions in the hydrogen (H2)-air fuel cell. Herein, we demonstrate H2-air performance gains achieved with an iron-nitrogen-carbon catalyst synthesized with two nitrogen precursors that developed hierarchical porosity. Current densities recorded in the kinetic region of cathode operation, at fuel cell voltages greater than ~0.75 V, were the same as those obtained with a Pt cathode at a loading of 0.1 milligram of Pt per centimeter squared. The proposed catalytic active site, carbon-embedded nitrogen-coordinated iron (FeN4), was directly visualized with aberration-corrected scanning transmission electron microscopy, and the contributions of these active sites associated with specific lattice-level carbon structures were explored computationally.
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Affiliation(s)
- Hoon T Chung
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - David A Cullen
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Drew Higgins
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Brian T Sneed
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Edward F Holby
- Sigma Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Karren L More
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Piotr Zelenay
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
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8
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Sneed BT, Cullen DA, Reeves KS, Dyck OE, Langlois DA, Mukundan R, Borup RL, More KL. 3D Analysis of Fuel Cell Electrocatalyst Degradation on Alternate Carbon Supports. ACS Appl Mater Interfaces 2017; 9:29839-29848. [PMID: 28809471 DOI: 10.1021/acsami.7b09716] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Understanding the mechanisms associated with Pt/C electrocatalyst degradation in proton exchange membrane fuel cell (PEMFC) cathodes is critical for the future development of higher-performing materials; however, there is a lack of information regarding Pt coarsening under PEMFC operating conditions within the cathode catalyst layer. We report a direct and quantitative 3D study of Pt dispersions on carbon supports (high surface area carbon (HSAC), Vulcan XC-72, and graphitized carbon) with varied surface areas, graphitic character, and Pt loadings ranging from 5 to 40 wt %. This is accomplished both before and after catalyst-cycling accelerated stress tests (ASTs) through observations of the cathode catalyst layer of membrane electrode assemblies. Electron tomography results show Pt nanoparticle agglomeration occurs predominantly at junctions and edges of aggregated graphitized carbon particles, leading to poor Pt dispersion in the as-prepared catalysts and increased coalescence during ASTs. Tomographic reconstructions of Pt/HSAC show much better initial Pt dispersions, less agglomeration, and less coarsening during ASTs in the cathode. However, a large loss of the electrochemically active surface area (ECSA) is still observed and is attributed to accelerated Pt dissolution and nanoparticle coalescence. Furthermore, a strong correlation between Pt particle/agglomerate size and measured ECSA is established and is proposed as a more useful metric than average crystallite size in predicting degradation behavior across different catalyst systems.
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Affiliation(s)
- Brian T Sneed
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - David A Cullen
- Materials Science and Technology Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Kimberly S Reeves
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Ondrej E Dyck
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - David A Langlois
- Materials Physics and Applications Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Rangachary Mukundan
- Materials Physics and Applications Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Rodney L Borup
- Materials Physics and Applications Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Karren L More
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
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9
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Becknell N, Son Y, Kim D, Li D, Yu Y, Niu Z, Lei T, Sneed BT, More KL, Markovic NM, Stamenkovic VR, Yang P. Control of Architecture in Rhombic Dodecahedral Pt–Ni Nanoframe Electrocatalysts. J Am Chem Soc 2017; 139:11678-11681. [DOI: 10.1021/jacs.7b05584] [Citation(s) in RCA: 144] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Nigel Becknell
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Materials
Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Yoonkook Son
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Dohyung Kim
- Department
of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Dongguo Li
- Materials
Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Yi Yu
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Zhiqiang Niu
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Teng Lei
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Brian T. Sneed
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Karren L. More
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Nenad M. Markovic
- Materials
Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Vojislav R. Stamenkovic
- Materials
Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Peidong Yang
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Materials
Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department
of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Kavli Energy NanoSciences Institute, Berkeley, California 94720, United States
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10
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Guo W, Sneed BT, Zhou L, Tang W, Kramer MJ, Cullen DA, Poplawsky JD. Correlative Energy-Dispersive X-Ray Spectroscopic Tomography and Atom Probe Tomography of the Phase Separation in an Alnico 8 Alloy. Microsc Microanal 2016; 22:1251-1260. [PMID: 27998366 DOI: 10.1017/s1431927616012496] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Alnico alloys have long been used as strong permanent magnets because of their ferromagnetism and high coercivity. Understanding their structural details allows for better prediction of the resulting magnetic properties. However, quantitative three-dimensional characterization of the phase separation in these alloys is still challenged by the spatial quantification of nanoscale phases. Herein, we apply a dual tomography approach, where correlative scanning transmission electron microscopy (STEM) energy-dispersive X-ray spectroscopic (EDS) tomography and atom probe tomography (APT) are used to investigate the initial phase separation process of an alnico 8 alloy upon non-magnetic annealing. STEM-EDS tomography provides information on the morphology and volume fractions of Fe-Co-rich and Νi-Al-rich phases after spinodal decomposition in addition to quantitative information of the composition of a nanoscale volume. Subsequent analysis of a portion of the same specimen by APT offers quantitative chemical information of each phase at the sub-nanometer scale. Furthermore, APT reveals small, 2-4 nm Fe-rich α 1 phases that are nucleated in the Ni-rich α 2 matrix. From this information, we show that phase separation of the alnico 8 alloy consists of both spinodal decomposition and nucleation and growth processes. The complementary benefits and challenges associated with correlative STEM-EDS and APT are discussed.
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Affiliation(s)
- Wei Guo
- 1Oak Ridge National Laboratory,Center for Nanophase Materials Sciences,Oak Ridge,TN 37831,USA
| | - Brian T Sneed
- 1Oak Ridge National Laboratory,Center for Nanophase Materials Sciences,Oak Ridge,TN 37831,USA
| | - Lin Zhou
- 2Ames Laboratory, Division of Materials Science and Engineering,Ames,IA 50011,USA
| | - Wei Tang
- 2Ames Laboratory, Division of Materials Science and Engineering,Ames,IA 50011,USA
| | - Matthew J Kramer
- 2Ames Laboratory, Division of Materials Science and Engineering,Ames,IA 50011,USA
| | - David A Cullen
- 3Oak Ridge National Laboratory,Materials Science and Technology Division,Oak Ridge,TN 37831,USA
| | - Jonathan D Poplawsky
- 1Oak Ridge National Laboratory,Center for Nanophase Materials Sciences,Oak Ridge,TN 37831,USA
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11
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Hsu SC, Chuang YC, Sneed BT, Cullen DA, Chiu TW, Kuo CH. Turning the Halide Switch in the Synthesis of Au-Pd Alloy and Core-Shell Nanoicosahedra with Terraced Shells: Performance in Electrochemical and Plasmon-Enhanced Catalysis. Nano Lett 2016; 16:5514-20. [PMID: 27575057 DOI: 10.1021/acs.nanolett.6b02005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Au-Pd nanocrystals are an intriguing system to study the integrated functions of localized surface plasmon resonance (LSPR) and heterogeneous catalysis. Gold is both durable and can harness incident light energy to enhance the catalytic activity of another metal, such as Pd, via the SPR effect in bimetallic nanocrystals. Despite the superior catalytic performance of icosahedral (IH) nanocrystals compared to alternate morphologies, the controlled synthesis of alloy and core-shell IH is still greatly challenged by the disparate reduction rates of metal precursors and lack of continuous epigrowth on multiply twinned boundaries of such surfaces. Herein, we demonstrate a one-step strategy for the controlled growth of monodisperse Au-Pd alloy and core-shell IH with terraced shells by turning an ionic switch between [Br(-)]/[Cl(-)] in the coreduction process. The core-shell IH nanocrystals contain AuPd alloy cores and ultrathin Pd shells (<2 nm). They not only display more than double the activity of the commercial Pd catalysts in ethanol electrooxidation attributed to monatomic step terraces but also show SPR-enhanced conversion of 4-nitrophenol. This strategy holds promise toward the development of alternate bimetallic IH nanocrystals for electrochemical and plasmon-enhanced catalysis.
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Affiliation(s)
- Shih-Cheng Hsu
- Institute of Chemistry, Academia Sinica , Taipei 11529, Taiwan
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology , Taipei 10608, Taiwan
| | - Yu-Chun Chuang
- National Synchrotron Radiation Research Center , Hsinchu 30076, Taiwan
| | | | | | - Te-Wei Chiu
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology , Taipei 10608, Taiwan
| | - Chun-Hong Kuo
- Institute of Chemistry, Academia Sinica , Taipei 11529, Taiwan
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Zhuang J, Chou LY, Sneed BT, Cao Y, Hu P, Feng L, Tsung CK. Surfactant-Mediated Conformal Overgrowth of Core-Shell Metal-Organic Framework Materials with Mismatched Topologies. Small 2015; 11:5551-5. [PMID: 26344934 DOI: 10.1002/smll.201501710] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 07/26/2015] [Indexed: 05/22/2023]
Abstract
Fracture-free and conformal Pd-UiO-66@ZIF-8 core-shell metal-organic framework material is synthesized by a surfactant-mediated method. The hierarchical nanoporous material exhibits great size-selective hydrogenation catalysis and demonstrates potentials for many different applications.
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Affiliation(s)
- Jia Zhuang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Lien-Yang Chou
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Brian T Sneed
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Yingze Cao
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
- Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Pan Hu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Lin Feng
- Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Chia-Kuang Tsung
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
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Abstract
The focus on surface lattice strain in nanostructures as a fundamental research topic has gained momentum in recent years as scientists investigated its significant impact on the surface electronic structure and catalytic properties of nanomaterials. Researchers have begun to tell a more complete story of catalysis from a perspective which brings this concept to the forefront of the discussion. The nano-'realm' makes the effects of surface lattice strain, which acts on the same spatial scales, more pronounced due to a higher ratio of surface to bulk atoms. This is especially evident in the field of metal nanoparticle catalysis, where displacement of atoms on surfaces can significantly alter the sorption properties of molecules. In part, the concept of strain-engineering for catalysis opened up due to the achievements that were made in the synthesis of a more sophisticated nanoparticle library from an ever-expanding set of methodologies. Developing synthesis methods for metal nanoparticles with well-defined and strained architectures is a worthy goal that, if reached, will have considerable impact in the search for catalysts. In this review, we summarize the recent accomplishments in the area of surface lattice-strained metal nanoparticle synthesis, framing the discussion from the important perspective of surface lattice strain effects in catalysis.
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Affiliation(s)
- Brian T Sneed
- Boston College Chemistry Department, Merkert Chemistry Center, 2609 Beacon St, Chestnut Hill, MA 02467, USA.
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Sneed BT, Young AP, Jalalpoor D, Golden MC, Mao S, Jiang Y, Wang Y, Tsung CK. Shaped Pd-Ni-Pt core-sandwich-shell nanoparticles: influence of Ni sandwich layers on catalytic electrooxidations. ACS Nano 2014; 8:7239-7250. [PMID: 24896733 DOI: 10.1021/nn502259g] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Shape-controlled metal nanoparticles (NPs) interfacing Pt and nonprecious metals (M) are highly active energy conversion electrocatalysts; however, there are still few routes to shaped M-Pt core-shell NPs and fewer studies on the geometric effects of shape and strain on catalysis by such structures. Here, well-defined cubic multilayered Pd-Ni-Pt sandwich NPs are synthesized as a model platform to study the effects of the nonprecious metal below the shaped Pt surface. The combination of shaped Pd substrates and mild reduction conditions directs the Ni and Pt overgrowth in an oriented, layer-by-layer fashion. Exposing a majority of Pt(100) facets, the catalytic performance in formic acid and methanol electro-oxidations (FOR and MOR) is assessed for two different Ni layer thicknesses and two different particle sizes of the ternary sandwich NPs. The strain imparted to the Pt shell layer by the introduction of the Ni sandwich layer (Ni-Pt lattice mismatch of ∼11%) results in higher specific initial activities compared to core-shell Pd-Pt bimetallic NPs in alkaline MOR. The trends in activity are the same for FOR and MOR electrocatalysis in acidic electrolyte. However, restructuring in acidic conditions suggests a more complex catalytic behavior from changes in composition. Notably, we also show that cubic quaternary Au-Pd-Ni-Pt multishelled NPs, and Pd-Ni-Pt nanooctahedra can be generated by the method, the latter of which hold promise as potentially highly active oxygen reduction catalysts.
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Affiliation(s)
- Brian T Sneed
- Department of Chemistry, Merkert Chemistry Center, Boston College , 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
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15
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Kuo CH, Lamontagne LK, Brodsky CN, Chou LY, Zhuang J, Sneed BT, Sheehan MK, Tsung CK. The effect of lattice strain on the catalytic properties of Pd nanocrystals. ChemSusChem 2013; 6:1993-2000. [PMID: 24106237 DOI: 10.1002/cssc.201300447] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Indexed: 05/04/2023]
Abstract
The effect of lattice strain on the catalytic properties of Pd nanoparticles is systematically studied. Synthetic strategies for the preparation of a series of shape-controlled Pd nanocrystals with lattice strain generated from different sources has been developed. All of these nanocrystals were created with the same capping agent under similar reaction conditions. First, a series of Pd nanoparticles was synthesized that were enclosed in {111} surfaces: Single-crystalline Pd octahedra, single-crystalline AuPd core-shell octahedra, and twinned Pd icosahedra. Next, various {100}-terminated particles were synthesized: Single-crystalline Pd cubes and single-crystalline AuPd core-shell cubes. Different extents of lattice strain were evident by comparing the X-ray diffraction patterns of these particles. During electrocatalysis, decreased potentials for CO stripping and increased current densities for formic-acid oxidation were observed for the strained nanoparticles. In the gas-phase hydrogenation of ethylene, the activities of the strained nanoparticles were lower than those of the single-crystalline Pd nanoparticles, perhaps owing to a larger amount of cetyl trimethylammonium bromide on the surface.
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Affiliation(s)
- Chun-Hong Kuo
- Department of Chemistry, Boston College, 2609 Beacon St., Chestnut Hill, MA 02467 (USA)
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Sneed BT, Brodsky CN, Kuo CH, Lamontagne LK, Jiang Y, Wang Y, Tao F(F, Huang W, Tsung CK. Nanoscale-Phase-Separated Pd–Rh Boxes Synthesized via Metal Migration: An Archetype for Studying Lattice Strain and Composition Effects in Electrocatalysis. J Am Chem Soc 2013; 135:14691-700. [DOI: 10.1021/ja405387q] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Brian T. Sneed
- Department
of Chemistry, Merkert Chemistry Center, Boston College, 2609
Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Casey N. Brodsky
- Department
of Chemistry, Merkert Chemistry Center, Boston College, 2609
Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Chun-Hong Kuo
- Department
of Chemistry, Merkert Chemistry Center, Boston College, 2609
Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Leo K. Lamontagne
- Department
of Chemistry, Merkert Chemistry Center, Boston College, 2609
Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Ying Jiang
- Center
of Electron Microscopy and State Key Laboratory of Silicon Materials,
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yong Wang
- Center
of Electron Microscopy and State Key Laboratory of Silicon Materials,
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Franklin (Feng) Tao
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Weixin Huang
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Chia-Kuang Tsung
- Department
of Chemistry, Merkert Chemistry Center, Boston College, 2609
Beacon Street, Chestnut Hill, Massachusetts 02467, United States
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Sneed BT, Kuo CH, Brodsky CN, Tsung CK. Iodide-Mediated Control of Rhodium Epitaxial Growth on Well-Defined Noble Metal Nanocrystals: Synthesis, Characterization, and Structure-Dependent Catalytic Properties. J Am Chem Soc 2012; 134:18417-26. [DOI: 10.1021/ja308030h] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Brian T. Sneed
- Department
of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
| | - Chun-Hong Kuo
- Department
of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
| | - Casey N. Brodsky
- Department
of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
| | - Chia-Kuang Tsung
- Department
of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
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Kuo CH, Tang Y, Chou LY, Sneed BT, Brodsky CN, Zhao Z, Tsung CK. Yolk–Shell Nanocrystal@ZIF-8 Nanostructures for Gas-Phase Heterogeneous Catalysis with Selectivity Control. J Am Chem Soc 2012; 134:14345-8. [DOI: 10.1021/ja306869j] [Citation(s) in RCA: 548] [Impact Index Per Article: 45.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Chun-Hong Kuo
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
| | - Yang Tang
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
| | - Lien-Yang Chou
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
| | - Brian T. Sneed
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
| | - Casey N. Brodsky
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
| | - Zipeng Zhao
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
| | - Chia-Kuang Tsung
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill,
Massachusetts 02467, United States
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