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Shen T, Xiao D, Deng Z, Wang S, An L, Song M, Zhang Q, Zhao T, Gong M, Wang D. Stabilizing Diluted Active Sites of Ultrasmall High-Entropy Intermetallics for Efficient Formic Acid Electrooxidation. Angew Chem Int Ed Engl 2024; 63:e202403260. [PMID: 38503695 DOI: 10.1002/anie.202403260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/08/2024] [Accepted: 03/19/2024] [Indexed: 03/21/2024]
Abstract
The poisoning of undesired intermediates or impurities greatly hinders the catalytic performances of noble metal-based catalysts. Herein, high-entropy intermetallics i-(PtPdIrRu)2FeCu (HEI) are constructed to inhibit the strongly adsorbed carbon monoxide intermediates (CO*) during the formic acid oxidation reaction. As probed by multiple-scaled structural characterizations, HEI nanoparticles are featured with partially negative Pt oxidation states, diluted Pt/Pd/Ir/Ru atomic sites and ultrasmall average size less than 2 nm. Benefiting from the optimized structures, HEI nanoparticles deliver more than 10 times promotion in intrinsic activity than that of pure Pt, and well-enhanced mass activity/durability than that of ternary i-Pt2FeCu intermetallics counterpart. In situ infrared spectroscopy manifests that both bridge and top CO* are favored on pure Pt but limited on HEI. Further theoretical elaboration indicates that HEI displayed a much weaker binding of CO* on Pt sites and sluggish diffusion of CO* among different sites, in contrast to pure Pt that CO* bound more strongly and was easy to diffuse on larger Pt atomic ensembles. This work verifies that HEIs are promising catalysts via integrating the merits of intermetallics and high-entropy alloys.
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Affiliation(s)
- Tao Shen
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Dongdong Xiao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Zhiping Deng
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Shuang Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Lulu An
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Min Song
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Qian Zhang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Tonghui Zhao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Mingxing Gong
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Deli Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
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2
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Zhang P, Chen HC, Zhu H, Chen K, Li T, Zhao Y, Li J, Hu R, Huang S, Zhu W, Liu Y, Pan Y. Inter-site structural heterogeneity induction of single atom Fe catalysts for robust oxygen reduction. Nat Commun 2024; 15:2062. [PMID: 38453927 PMCID: PMC10920901 DOI: 10.1038/s41467-024-46389-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 02/23/2024] [Indexed: 03/09/2024] Open
Abstract
Metal-nitrogen-carbon catalysts with hierarchically dispersed porosity are deemed as efficient geometry for oxygen reduction reaction (ORR). However, catalytic performance determined by individual and interacting sites originating from structural heterogeneity is particularly elusive and yet remains to be understood. Here, an efficient hierarchically porous Fe single atom catalyst (Fe SAs-HP) is prepared with Fe atoms densely resided at micropores and mesopores. Fe SAs-HP exhibits robust ORR performance with half-wave potential of 0.94 V and turnover frequency of 5.99 e-1s-1site-1 at 0.80 V. Theoretical simulations unravel a structural heterogeneity induced optimization, where mesoporous Fe-N4 acts as real active centers as a result of long-range electron regulation by adjacent microporous sites, facilitating O2 activation and desorption of key intermediate *OH. Multilevel operando characterization results identify active Fe sites undergo a dynamic evolution from basic Fe-N4 to active Fe-N3 under working conditions. Our findings reveal the structural origin of enhanced intrinsic activity for hierarchically porous Fe-N4 sites.
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Affiliation(s)
- Peng Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China
| | - Hsiao-Chien Chen
- Center for Reliability Science and Technologies, Chang Gung University, Taoyuan, 33302, Taiwan
- Kidney Research Center, Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taoyuan, 33305, Taiwan
| | - Houyu Zhu
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Kuo Chen
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China
| | - Tuya Li
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Yilin Zhao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China
| | - Jiaye Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China
| | - Ruanbo Hu
- State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Siying Huang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China
| | - Wei Zhu
- State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yunqi Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China.
| | - Yuan Pan
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, China.
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3
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Gatin AK, Dokhlikova NV, Mukhutdinova RG, Ozerin SA, Grishin MV. Specific Features of the Interaction of Oxidized Platinum Nanoparticles with Molecular Hydrogen and Carbon Monoxide. COLLOID JOURNAL 2022. [DOI: 10.1134/s1061933x22600233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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4
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Li G, Marinkovic N, Wang B, Komarneni MR, Resasco DE. Manipulating the Microenvironment of Surfactant-Encapsulated Pt Nanoparticles to Promote Activity and Selectivity. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gengnan Li
- School of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, Oklahoma73019, United States
| | - Nebojsa Marinkovic
- Synchrotron Catalysis Consortium and Department of Chemical Engineering, Columbia University, New York, New York10027, United States
| | - Bin Wang
- School of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, Oklahoma73019, United States
| | - Mallikharjuna Rao Komarneni
- School of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, Oklahoma73019, United States
| | - Daniel E. Resasco
- School of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, Oklahoma73019, United States
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5
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Su X, Jiang Z, Zhou J, Liu H, Zhou D, Shang H, Ni X, Peng Z, Yang F, Chen W, Qi Z, Wang D, Wang Y. Complementary Operando Spectroscopy identification of in-situ generated metastable charge-asymmetry Cu2-CuN3 clusters for CO2 reduction to ethanol. Nat Commun 2022; 13:1322. [PMID: 35277523 PMCID: PMC8917205 DOI: 10.1038/s41467-022-29035-8] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 02/23/2022] [Indexed: 12/21/2022] Open
Abstract
Copper-based materials can reliably convert carbon dioxide into multi-carbon products but they suffer from poor activity and product selectivity. The atomic structure-activity relationship of electrocatalysts for the selectivity is controversial due to the lacking of systemic multiple dimensions for operando condition study. Herein, we synthesized high-performance CO2RR catalyst comprising of CuO clusters supported on N-doped carbon nanosheets, which exhibited high C2+ products Faradaic efficiency of 73% including decent ethanol selectivity of 51% with a partial current density of 14.4 mA/cm−2 at −1.1 V vs. RHE. We evidenced catalyst restructuring and tracked the variation of the active states under reaction conditions, presenting the atomic structure-activity relationship of this catalyst. Operando XAS, XANES simulations and Quasi-in-situ XPS analyses identified a reversible potential-dependent transformation from dispersed CuO clusters to Cu2-CuN3 clusters which are the optimal sites. This cluster can’t exist without the applied potential. The N-doping dispersed the reduced Cun clusters uniformly and maintained excellent stability and high activity with adjusting the charge distribution between the Cu atoms and N-doped carbon interface. By combining Operando FTIR and DFT calculations, it was recognized that the Cu2-CuN3 clusters displayed charge-asymmetric sites which were intensified by CH3* adsorbing, beneficial to the formation of the high-efficiency asymmetric ethanol. Copper-based materials can convert carbon dioxide into multi-carbon products but suffer from poor activity and selectivity. Here, the authors report CuO clusters supported on nitrogen-doped carbon nanosheets for the reduction CO2-to-ethanol, and investigate the change in the catalytic sites while in operation.
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KIKKAWA S, Teramura K, Kato K, Asakura H, Hosokawa S, Tanaka T. Formation of CH4 at Metal–Support Interface of Pt/Al2O3 During Hydrogenation of CO2: Operando XAS‐DRIFTS Study. ChemCatChem 2022. [DOI: 10.1002/cctc.202101723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Soichi KIKKAWA
- Tokyo Metropolitan University Graduate School and Faculty of Science: Tokyo Toritsu Daigaku Rigakubu Daigakuin Rigaku Kenkyuka Chemistry 1-1 Minami-Osawa 192-0397 Hachioji JAPAN
| | - Kentaro Teramura
- Kyoto University Department of Molecular Engineering, Graduate School of Engineering Kyotodaigaku Katsura 615-8510 Kyoto JAPAN
| | - Kazuo Kato
- Japan Synchrotron Radiation Research Institute, SPring-8 Center for Synchrotron Radiation Research JAPAN
| | - Hiroyuki Asakura
- Kyoto University Faculty of Engineering Graduate School of Engineering: Kyoto Daigaku Kogakubu Daigakuin Kogaku Kenkyuka Department of Molecular Engineering JAPAN
| | - Saburo Hosokawa
- Kyoto University Faculty of Engineering Graduate School of Engineering: Kyoto Daigaku Kogakubu Daigakuin Kogaku Kenkyuka Department of Molecular Engineering JAPAN
| | - Tsunehiro Tanaka
- Kyoto University Faculty of Engineering Graduate School of Engineering: Kyoto Daigaku Kogakubu Daigakuin Kogaku Kenkyuka Department of Molecular Engineering JAPAN
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7
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KIKKAWA S, TERAMURA K, ASAKURA H, HOSOKAWA S, TANAKA T. In Situ Time-Resolved XAS Study on Metal-Support-Interaction-Induced Morphology Change of PtO2 Nanoparticles Supported on γ-Al2O3 Under H2 Reduction. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.02.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Piccolo L. Restructuring effects of the chemical environment in metal nanocatalysis and single-atom catalysis. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.03.052] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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9
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Khan S, Sharifi M, Hasan A, Attar F, Edis Z, Bai Q, Derakhshankhah H, Falahati M. Magnetic nanocatalysts as multifunctional platforms in cancer therapy through the synthesis of anticancer drugs and facilitated Fenton reaction. J Adv Res 2021; 30:171-184. [PMID: 34026294 PMCID: PMC8132204 DOI: 10.1016/j.jare.2020.12.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 11/16/2020] [Accepted: 12/01/2020] [Indexed: 12/19/2022] Open
Abstract
Background Heterocyclic compounds have always been used as a core portion in the development of anticancer drugs. However, there is a pressing need for developing inexpensive and simple alternatives to high-cost and complex chemical agents-based catalysts for large-scale production of heterocyclic compounds. Also, development of some smart platforms for cancer treatment based on nanoparticles (NPs) which facilitate Fenton reaction have been widely explored by different scientists. Magnetic NPs not only can serve as catalysts in the synthesis of heterocyclic compounds with potential anticancer properties, but also are widely used as smart agents in targeting cancer cells and inducing Fenton reactions. Aim of Review Therefore, in this review we aim to present an updated summary of the reports related to the main clinical or basic application and research progress of magnetic NPs in cancer as well as their application in the synthesis of heterocyclic compounds as potential anticancer drugs. Afterwards, specific tumor microenvironment (TME)-responsive magnetic nanocatalysts for cancer treatment through triggering Fenton-like reactions were surveyed. Finally, some ignored factors in the design of magnetic nanocatalysts- triggered Fenton-like reaction, challenges and future perspective of magnetic nanocatalysts-assisted synthesis of heterocyclic compounds and selective cancer therapy were discussed.Key Scientific Concepts of Review:This review may pave the way for well-organized translation of magnetic nanocatalysts in cancer therapy from the bench to the bedside.
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Affiliation(s)
- Suliman Khan
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China
| | - Majid Sharifi
- Department of Nanotechnology, Faculty of Advanced Sciences and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Anwarul Hasan
- Department of Mechanical and Industrial Engineering, College of Engineering, Qatar University, Doha 2713, Qatar
- Biomedical Research Center, Qatar University, Doha 2713, Qatar
| | - Farnoosh Attar
- Department of Food Toxicology, Research Center of Food Technology and Agricultural Products, Standard Research Institute (SRI), Karaj, Iran
| | - Zehra Edis
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Ajman University, PO Box 346, Ajman, United Arab Emirates
| | - Qian Bai
- Department of Anesthesiology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China
| | - Hossein Derakhshankhah
- Pharmaceutical Sciences Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mojtaba Falahati
- Department of Nanotechnology, Faculty of Advanced Sciences and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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10
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Yasumura S, Ide H, Ueda T, Jing Y, Liu C, Kon K, Toyao T, Maeno Z, Shimizu KI. Transformation of Bulk Pd to Pd Cations in Small-Pore CHA Zeolites Facilitated by NO. JACS AU 2021; 1:201-211. [PMID: 34467284 PMCID: PMC8395613 DOI: 10.1021/jacsau.0c00112] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Indexed: 06/13/2023]
Abstract
Atomic dispersion of metal species has attracted attention as a unique phenomenon that affects adsorption properties and catalytic activities and that can be used to design so-called single atom materials. In this work, we describe atomic dispersion of bulk Pd into small pores of CHA zeolites. Under 4% NO flow at 600 °C, bulk Pd metal on the outside of CHA zeolites effectively disperses, affording Pd2+ cations on Al sites with concomitant formation of N2O, as revealed by microscopic and spectroscopic characterizations combined with mass spectroscopy. In the present method, even commercially available submicrosized Pd black can be used as a Pd source, and importantly, 4.1 wt % of atomic Pd2+ cations, which is the highest loading amount reported so far, can be introduced into CHA zeolites. The structural evolution of bulk Pd metal is also investigated by in situ X-ray absorption spectroscopy (XAS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), as well as ab initio thermodynamic analysis using density functional theory (DFT) calculations.
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Affiliation(s)
- Shunsaku Yasumura
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Hajime Ide
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Taihei Ueda
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Yuan Jing
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Chong Liu
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Kenichi Kon
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Takashi Toyao
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
- Elements
Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Zen Maeno
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Ken-ichi Shimizu
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
- Elements
Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
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11
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Timoshenko J, Roldan Cuenya B. In Situ/ Operando Electrocatalyst Characterization by X-ray Absorption Spectroscopy. Chem Rev 2021; 121:882-961. [PMID: 32986414 PMCID: PMC7844833 DOI: 10.1021/acs.chemrev.0c00396] [Citation(s) in RCA: 205] [Impact Index Per Article: 68.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Indexed: 12/18/2022]
Abstract
During the last decades, X-ray absorption spectroscopy (XAS) has become an indispensable method for probing the structure and composition of heterogeneous catalysts, revealing the nature of the active sites and establishing links between structural motifs in a catalyst, local electronic structure, and catalytic properties. Here we discuss the fundamental principles of the XAS method and describe the progress in the instrumentation and data analysis approaches undertaken for deciphering X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra. Recent usages of XAS in the field of heterogeneous catalysis, with emphasis on examples concerning electrocatalysis, will be presented. The latter is a rapidly developing field with immense industrial applications but also unique challenges in terms of the experimental characterization restrictions and advanced modeling approaches required. This review will highlight the new insight that can be gained with XAS on complex real-world electrocatalysts including their working mechanisms and the dynamic processes taking place in the course of a chemical reaction. More specifically, we will discuss applications of in situ and operando XAS to probe the catalyst's interactions with the environment (support, electrolyte, ligands, adsorbates, reaction products, and intermediates) and its structural, chemical, and electronic transformations as it adapts to the reaction conditions.
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Affiliation(s)
- Janis Timoshenko
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz-Haber Institute of the Max-Planck Society, 14195 Berlin, Germany
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12
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Rodriguez‐Gomez A, Lopez‐Martin A, Ramirez A, Gascon J, Caballero A. Elucidating the Promotional Effect of Cerium in the Dry Reforming of Methane. ChemCatChem 2020. [DOI: 10.1002/cctc.202001527] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Alberto Rodriguez‐Gomez
- Instituto de Ciencia de Materiales de Sevilla (CSIC-University of Seville) and Departamento de Quimica Inorganica University of Seville 41092 Seville Spain
- KAUST Catalysis Center (KCC) Advanced Catalytic Materials King Abdullah University of Science and Technology Thuwal 23955 Saudi Arabia
| | - Angeles Lopez‐Martin
- Instituto de Ciencia de Materiales de Sevilla (CSIC-University of Seville) and Departamento de Quimica Inorganica University of Seville 41092 Seville Spain
| | - Adrian Ramirez
- KAUST Catalysis Center (KCC) Advanced Catalytic Materials King Abdullah University of Science and Technology Thuwal 23955 Saudi Arabia
| | - Jorge Gascon
- KAUST Catalysis Center (KCC) Advanced Catalytic Materials King Abdullah University of Science and Technology Thuwal 23955 Saudi Arabia
| | - Alfonso Caballero
- Instituto de Ciencia de Materiales de Sevilla (CSIC-University of Seville) and Departamento de Quimica Inorganica University of Seville 41092 Seville Spain
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13
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Song B, Yang TT, Yuan Y, Sharifi-Asl S, Cheng M, Saidi WA, Liu Y, Shahbazian-Yassar R. Revealing Sintering Kinetics of MoS 2-Supported Metal Nanocatalysts in Atmospheric Gas Environments via Operando Transmission Electron Microscopy. ACS NANO 2020; 14:4074-4086. [PMID: 32283933 DOI: 10.1021/acsnano.9b08757] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The decoration of two-dimensional (2D) substrates with nanoparticles (NPs) serve as heterostructures for various catalysis applications. Deep understanding of catalyst degradation mechanisms during service conditions is crucial to improve the catalyst durability. Herein, we studied the sintering behavior of Pt and bimetallic Au-core Pt-shell (Au@Pt core-shell) NPs on MoS2 supports at high temperatures under vacuum, nitrogen (N2), hydrogen (H2), and air environments by in situ gas-cell transmission electron microscopy (TEM). The key observations are summarized as effect of environment: while particle migration and coalescence (PMC) was the main mechanism that led to Pt and Au@Pt NPs degradation under vacuum, N2, and H2 environments, the degradation of MoS2 substrate was prominent under exposure to air at high temperatures. Pt NPs were less stable in H2 environment when compared with the Pt NPs under vacuum or N2, due to Pt-H interactions that weakened the adhesion of Pt on MoS2. Effect of NP composition: under H2, the stability of Au@Pt NPs was higher in comparison to Pt NPs. This is because H2 promotes the alloying of Pt-Au, thus reducing the number of Pt at the surface (reducing H2 interactions) and increasing Pt atoms in contact with MoS2. Effect of NP size: The alloying effect promoted by H2 was more pronounced in small size Au@Pt NPs resulting in their higher sintering resistance in comparison to large size Au@Pt NPs and similar size Pt NPs. The present work provides key insights into the parameters affecting the catalyst degradation mechanisms on 2D supports.
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Affiliation(s)
- Boao Song
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Timothy T Yang
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Yifei Yuan
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Soroosh Sharifi-Asl
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Meng Cheng
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Wissam A Saidi
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Yuzi Liu
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Reza Shahbazian-Yassar
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
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14
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Marcella N, Liu Y, Timoshenko J, Guan E, Luneau M, Shirman T, Plonka AM, van der Hoeven JES, Aizenberg J, Friend CM, Frenkel AI. Neural network assisted analysis of bimetallic nanocatalysts using X-ray absorption near edge structure spectroscopy. Phys Chem Chem Phys 2020; 22:18902-18910. [DOI: 10.1039/d0cp02098b] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trained neural networks are used to extract the first partial coordination numbers from XANES spectra. In bimetallic nanoparticles, the four local structure descriptors provide rich information on structural motifs.
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15
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Timoshenko J, Frenkel AI. “Inverting” X-ray Absorption Spectra of Catalysts by Machine Learning in Search for Activity Descriptors. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03599] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Janis Timoshenko
- Department of Interface Science, Fritz-Haber-Institute of the Max Planck Society, 14195 Berlin, Germany
| | - Anatoly I. Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
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16
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Macino M, Barnes AJ, Althahban SM, Qu R, Gibson EK, Morgan DJ, Freakley SJ, Dimitratos N, Kiely CJ, Gao X, Beale AM, Bethell D, He Q, Sankar M, Hutchings GJ. Tuning of catalytic sites in Pt/TiO2 catalysts for the chemoselective hydrogenation of 3-nitrostyrene. Nat Catal 2019. [DOI: 10.1038/s41929-019-0334-3] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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17
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Bergmann A, Roldan Cuenya B. Operando Insights into Nanoparticle Transformations during Catalysis. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01831] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Arno Bergmann
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
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18
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Dessal C, Len T, Morfin F, Rousset JL, Aouine M, Afanasiev P, Piccolo L. Dynamics of Single Pt Atoms on Alumina during CO Oxidation Monitored by Operando X-ray and Infrared Spectroscopies. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00903] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Caroline Dessal
- Univ Lyon, Université Claude Bernard—Lyon 1, CNRS, IRCELYON—UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne CEDEX, France
| | - Thomas Len
- Univ Lyon, Université Claude Bernard—Lyon 1, CNRS, IRCELYON—UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne CEDEX, France
| | - Franck Morfin
- Univ Lyon, Université Claude Bernard—Lyon 1, CNRS, IRCELYON—UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne CEDEX, France
| | - Jean-Luc Rousset
- Univ Lyon, Université Claude Bernard—Lyon 1, CNRS, IRCELYON—UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne CEDEX, France
| | - Mimoun Aouine
- Univ Lyon, Université Claude Bernard—Lyon 1, CNRS, IRCELYON—UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne CEDEX, France
| | - Pavel Afanasiev
- Univ Lyon, Université Claude Bernard—Lyon 1, CNRS, IRCELYON—UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne CEDEX, France
| | - Laurent Piccolo
- Univ Lyon, Université Claude Bernard—Lyon 1, CNRS, IRCELYON—UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne CEDEX, France
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19
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Dessal C, Sangnier A, Chizallet C, Dujardin C, Morfin F, Rousset JL, Aouine M, Bugnet M, Afanasiev P, Piccolo L. Atmosphere-dependent stability and mobility of catalytic Pt single atoms and clusters on γ-Al 2O 3. NANOSCALE 2019; 11:6897-6904. [PMID: 30912782 DOI: 10.1039/c9nr01641d] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Atomically dispersed metals promise the ultimate catalytic efficiency, but their stabilization onto suitable supports remains challenging owing to their aggregation tendency. Focusing on the industrially-relevant Pt/γ-Al2O3 catalyst, in situ X-ray absorption spectroscopy and environmental scanning transmission electron microscopy allow us to monitor the stabilization of Pt single atoms under O2 atmosphere, as well as their aggregation into mobile reduced subnanometric clusters under H2. Density functional theory calculations reveal that oxygen from the gas phase directly contributes to metal-support adhesion, maximal for single Pt atoms, whereas hydrogen only adsorbs on Pt, and thereby leads to Pt clustering. Finally, Pt cluster mobility is shown to be activated at low temperature and high H2 pressure. Our results highlight the crucial importance of the reactive atmosphere on the stability of single-atom versus cluster catalysts.
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Affiliation(s)
- Caroline Dessal
- Univ Lyon, Université Claude Bernard - Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne Cedex, France.
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20
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Gan Y, Wang ZD, Shi Y, Guo CQ, Tan HY, Lu ZX, Yan CF. Synthesis of density-multiplied Pt-NP arrays and their application in fuel cell by self-assembly of di-block copolymer. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.05.153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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21
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Simonsen SB, Wang Y, Jensen JO, Zhang W. Coarsening of carbon black supported Pt nanoparticles in hydrogen. NANOTECHNOLOGY 2017; 28:475710. [PMID: 28984273 DOI: 10.1088/1361-6528/aa91a8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This study addresses coarsening mechanisms of Pt nanoparticles supported on carbon black in hydrogen. By means of in situ transmission electron microscopy (TEM), Pt nanoparticle coarsening was monitored in 6 mbar 20% H2/Ar while ramping up the temperature to almost 1000 °C. Time-resolved TEM images directly reveal that separated ca. 3 nm sized Pt nanoparticles in a hydrogen environment are stable up to ca. 800 °C at a heating rate of 10 °C min-1. The coarsening above this temperature is dominated by the particle migration and coalescence mechanism. However, for agglomerated Pt nanoparticles, coalescence events were observed already above 200 °C. The temperature-dependency of particle sizes and the observed migration distances are described and found to be consistent with simple early models for the migration and coalescence.
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Affiliation(s)
- Søren Bredmose Simonsen
- Department of Energy Conversion and Storage, Technical University of Denmark, DK-4000 Roskilde, Denmark
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22
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Timoshenko J, Lu D, Lin Y, Frenkel AI. Supervised Machine-Learning-Based Determination of Three-Dimensional Structure of Metallic Nanoparticles. J Phys Chem Lett 2017; 8:5091-5098. [PMID: 28960990 DOI: 10.1021/acs.jpclett.7b02364] [Citation(s) in RCA: 122] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Tracking the structure of heterogeneous catalysts under operando conditions remains a challenge due to the paucity of experimental techniques that can provide atomic-level information for catalytic metal species. Here we report on the use of X-ray absorption near-edge structure (XANES) spectroscopy and supervised machine learning (SML) for refining the 3D geometry of metal catalysts. SML is used to unravel the hidden relationship between the XANES features and catalyst geometry. To train our SML method, we rely on ab initio XANES simulations. Our approach allows one to solve the structure of a metal catalyst from its experimental XANES, as demonstrated here by reconstructing the average size, shape, and morphology of well-defined platinum nanoparticles. This method is applicable to the determination of the nanoparticle structure in operando studies and can be generalized to other nanoscale systems. It also allows on-the-fly XANES analysis and is a promising approach for high-throughput and time-dependent studies.
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Affiliation(s)
- Janis Timoshenko
- Department of Material Science and Chemical Engineering, Stony Brook University , Stony Brook, New York 11794, United States
| | - Deyu Lu
- Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Yuewei Lin
- Computational Science Initiative, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Anatoly I Frenkel
- Department of Material Science and Chemical Engineering, Stony Brook University , Stony Brook, New York 11794, United States
- Division of Chemistry, Brookhaven National Laboratory , Upton, New York 11973, United States
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23
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Goodman ED, Schwalbe JA, Cargnello M. Mechanistic Understanding and the Rational Design of Sinter-Resistant Heterogeneous Catalysts. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01975] [Citation(s) in RCA: 166] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Emmett D. Goodman
- Department of Chemical Engineering
and SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, California 94305, United States
| | - Jay A. Schwalbe
- Department of Chemical Engineering
and SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, California 94305, United States
| | - Matteo Cargnello
- Department of Chemical Engineering
and SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, California 94305, United States
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24
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Mondal S, Rajesh T, Dhar BB, Snellman M, Li J, Leonard Deepak F, Devi RN. Understanding alloy structure and composition in sinter-resistant AgPd@SiO2 encapsulated catalysts and their effect on catalytic properties. NEW J CHEM 2017. [DOI: 10.1039/c7nj03652c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Effects of precursor particle size, extent of alloying and alloy composition on AgPd@SiO2 catalytic performances.
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Affiliation(s)
- Sourik Mondal
- Catalysis and Inorganic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Thattarathody Rajesh
- Catalysis and Inorganic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Basab B. Dhar
- Chemical Engineering and Process Development
- Division CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Markus Snellman
- Department of Advanced Electron Microscopy
- Imaging and Spectroscopy
- International Iberian Nanotechnology Laboratory
- Braga 4715-310
- Portugal
| | - Junjie Li
- Department of Advanced Electron Microscopy
- Imaging and Spectroscopy
- International Iberian Nanotechnology Laboratory
- Braga 4715-310
- Portugal
| | - Francis Leonard Deepak
- Department of Advanced Electron Microscopy
- Imaging and Spectroscopy
- International Iberian Nanotechnology Laboratory
- Braga 4715-310
- Portugal
| | - R. Nandini Devi
- Catalysis and Inorganic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
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25
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Ahmadi M, Mistry H, Roldan Cuenya B. Tailoring the Catalytic Properties of Metal Nanoparticles via Support Interactions. J Phys Chem Lett 2016; 7:3519-33. [PMID: 27530730 DOI: 10.1021/acs.jpclett.6b01198] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The development of new catalysts for energy technology and environmental remediation requires a thorough knowledge of how the physical and chemical properties of a catalyst affect its reactivity. For supported metal nanoparticles (NPs), such properties can include the particle size, shape, composition, and chemical state, but a critical parameter which must not be overlooked is the role of the NP support. Here, we highlight the key mechanisms behind support-induced enhancement in the catalytic properties of metal NPs. These include support-induced changes in the NP morphology, stability, electronic structure, and chemical state, as well as changes in the support due to the NPs. Utilizing the support-dependent phenomena described in this Perspective may allow significant breakthroughs in the design and tailoring of the catalytic activity and selectivity of metal nanoparticles.
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Affiliation(s)
- M Ahmadi
- Department of Physics, University of Central Florida , Orlando, Florida 32816, United States
| | - H Mistry
- Department of Physics, University of Central Florida , Orlando, Florida 32816, United States
- Department of Physics, Ruhr-University Bochum , 44801 Bochum, Germany
| | - B Roldan Cuenya
- Department of Physics, Ruhr-University Bochum , 44801 Bochum, Germany
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26
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Yan W, Kouk QY, Tan SX, Luo J, Liu Y. Effects of Pt 0 -PtO x particle size on 1-butene oxidative dehydrogenation to 1,3-butadiene using CO 2 as soft oxidant. J CO2 UTIL 2016. [DOI: 10.1016/j.jcou.2016.04.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Bar-Ziv R, Zidki T, Zilbermann I, Yardeni G, Meyerstein D. Effect of Hydrogen Pretreatment of Platinum Nanoparticles on their Catalytic Properties: Reactions with Alkyl Radicals - A Mechanistic Study. ChemCatChem 2016. [DOI: 10.1002/cctc.201600553] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ronen Bar-Ziv
- Chemistry Department; Nuclear Research Centre Negev; Beer-Sheva 84190 Israel
- Chemistry Department; Ben Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Tomer Zidki
- Chemical Sciences Department and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Applications; Ariel University; Ariel 40700 Israel
| | - Israel Zilbermann
- Chemistry Department; Nuclear Research Centre Negev; Beer-Sheva 84190 Israel
- Chemistry Department; Ben Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Guy Yardeni
- Chemistry Department; Nuclear Research Centre Negev; Beer-Sheva 84190 Israel
| | - Dan Meyerstein
- Chemistry Department; Ben Gurion University of the Negev; Beer-Sheva 84105 Israel
- Chemical Sciences Department and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Applications; Ariel University; Ariel 40700 Israel
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28
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House SD, Bonifacio CS, Grieshaber RV, Li L, Zhang Z, Ciston J, Stach EA, Yang JC. Statistical analysis of support thickness and particle size effects in HRTEM imaging of metal nanoparticles. Ultramicroscopy 2016; 169:22-29. [PMID: 27421079 DOI: 10.1016/j.ultramic.2016.06.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 06/08/2016] [Accepted: 06/23/2016] [Indexed: 10/21/2022]
Abstract
High-resolution transmission electron microscopy (HRTEM) examination of nanoparticles requires their placement on some manner of support - either TEM grid membranes or part of the material itself, as in many heterogeneous catalyst systems - but a systematic quantification of the practical imaging limits of this approach has been lacking. Here we address this issue through a statistical evaluation of how nanoparticle size and substrate thickness affects the ability to resolve structural features of interest in HRTEM images of metallic nanoparticles on common support membranes. The visibility of lattice fringes from crystalline Au nanoparticles on amorphous carbon and silicon supports of varying thickness was investigated with both conventional and aberration-corrected TEM. Over the 1-4nm nanoparticle size range examined, the probability of successfully resolving lattice fringes differed significantly as a function both of nanoparticle size and support thickness. Statistical analysis was used to formulate guidelines for the selection of supports and to quantify the impact a given support would have on HRTEM imaging of crystalline structure. For nanoparticles ≥1nm, aberration-correction was found to provide limited benefit for the purpose of visualizing lattice fringes; electron dose is more predictive of lattice fringe visibility than aberration correction. These results confirm that the ability to visualize lattice fringes is ultimately dependent on the signal-to-noise ratio of the HRTEM images, rather than the point-to-point resolving power of the microscope. This study provides a benchmark for HRTEM imaging of crystalline supported metal nanoparticles and is extensible to a wide variety of supports and nanostructures.
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Affiliation(s)
- Stephen D House
- Chemical and Petroleum Engineering, and Physics, University of Pittsburgh, Pittsburgh, PA 15261, USA.
| | - Cecile S Bonifacio
- Chemical and Petroleum Engineering, and Physics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Ross V Grieshaber
- Chemical and Petroleum Engineering, and Physics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Long Li
- Chemical and Petroleum Engineering, and Physics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Zhongfan Zhang
- Chemical and Petroleum Engineering, and Physics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Jim Ciston
- National Center of Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Eric A Stach
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Judith C Yang
- Chemical and Petroleum Engineering, and Physics, University of Pittsburgh, Pittsburgh, PA 15261, USA
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29
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Xin L, Yang F, Rasouli S, Qiu Y, Li ZF, Uzunoglu A, Sun CJ, Liu Y, Ferreira P, Li W, Ren Y, Stanciu LA, Xie J. Understanding Pt Nanoparticle Anchoring on Graphene Supports through Surface Functionalization. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02722] [Citation(s) in RCA: 146] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Le Xin
- Department
of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Fan Yang
- Department
of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Somaye Rasouli
- Materials
Science and Engineering Program, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Yang Qiu
- Department
of Chemical and Biological Engineering, Biorenewables Research Laboratory, Iowa State University, Ames, Iowa 50011, United States
| | - Zhe-Fei Li
- Department
of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
| | - Aytekin Uzunoglu
- School of
Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Cheng-Jun Sun
- Advanced
Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Yuzi Liu
- Center
for Nanoscale Materials, Argonne National Laboratory, 9700 South
Cass Avenue, Argonne, Illinois 60439, United States
| | - Paulo Ferreira
- Materials
Science and Engineering Program, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Wenzhen Li
- Department
of Chemical and Biological Engineering, Biorenewables Research Laboratory, Iowa State University, Ames, Iowa 50011, United States
| | - Yang Ren
- Advanced
Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Lia A. Stanciu
- School of
Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Weldon
School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Jian Xie
- Department
of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, United States
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30
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Mondal S, Samanta A, Dhar BB, Devi RN. Encapsulation of ultra small metal clusters in silica: Evolution of the concept of nanoreactors and the case of Ag–Pd@SiO2 alloy catalyst. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.11.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Tabib Zadeh Adibi P, Mazzotta F, Antosiewicz TJ, Skoglundh M, Grönbeck H, Langhammer C. In Situ Plasmonic Sensing of Platinum Model Catalyst Sintering on Different Oxide Supports and in O2 and NO2 Atmospheres with Different Concentrations. ACS Catal 2014. [DOI: 10.1021/cs5015173] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Behafarid F, Matos J, Hong S, Zhang L, Rahman TS, Roldan Cuenya B. Structural and electronic properties of micellar Au nanoparticles: size and ligand effects. ACS NANO 2014; 8:6671-6681. [PMID: 24437393 DOI: 10.1021/nn406568b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Gaining experimental insight into the intrinsic properties of nanoparticles (NPs) represents a scientific challenge due to the difficulty of deconvoluting these properties from various environmental effects such as the presence of adsorbates or a support. A synergistic combination of experimental and theoretical tools, including X-ray absorption fine-structure spectroscopy, scanning transmission electron microscopy, atomic force microscopy, and density functional theory was used in this study to investigate the structure and electronic properties of small (∼1-4 nm) Au NPs synthesized by an inverse micelle encapsulation method. Metallic Au NPs encapsulated by polystyrene 2-vinylpiridine (PS-P2VP) were studied in the solution phase (dispersed in toluene) as well as after deposition on γ-Al2O3. Our experimental data revealed a size-dependent contraction of the interatomic distances of the ligand-protected NPs with decreasing NP size. These findings are in good agreement with the results from DFT calculations of unsupported Au NPs surrounded by P2VP, as well as those obtained for pure (ligand-free) Au clusters of analogous sizes. A comparison of the experimental and theoretical results supports the conclusion that the P2VP ligands employed to stabilize the gold NPs do not lead to strong distortions in the average interatomic spacing. The changes in the electronic structure of the Au-P2VP NPs were found to originate mainly from finite size effects and not from charge transfer between the NPs and their environment (e.g., Au-ligand interactions). In addition, the isolated ligand-protected experimental NPs only display a weak interaction with the support, making them an ideal model system for the investigation of size-dependent physical and chemical properties of structurally well-defined nanomaterials.
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Affiliation(s)
- Farzad Behafarid
- Department of Physics, University of Central Florida , Orlando, Florida 32816, United States
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33
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Behafarid F, Pandey S, Diaz RE, Stach EA, Cuenya BR. An in situ transmission electron microscopy study of sintering and redispersion phenomena over size-selected metal nanoparticles: environmental effects. Phys Chem Chem Phys 2014; 16:18176-84. [DOI: 10.1039/c4cp02574a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The thermal and chemical stability of micelle-synthesized size-selected Pt nanoparticles (NPs) supported on thin SiO2(20 nm) films was monitoredin situ viatransmission electron microscopy (TEM) under pure hydrogen and pure oxygen environments.
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Affiliation(s)
| | - Sudeep Pandey
- Department of Physics
- University of Central Florida
- Orlando, USA
| | - Rosa E. Diaz
- Center of Functional Nanomaterials
- Brookhaven National Laboratory
- Upton, USA
| | - Eric A. Stach
- Center of Functional Nanomaterials
- Brookhaven National Laboratory
- Upton, USA
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34
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Mistry H, Behafarid F, Zhou E, Ono LK, Zhang L, Roldan Cuenya B. Shape-Dependent Catalytic Oxidation of 2-Butanol over Pt Nanoparticles Supported on γ-Al2O3. ACS Catal 2013. [DOI: 10.1021/cs400888n] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- H. Mistry
- Department
of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - F. Behafarid
- Department
of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - E. Zhou
- Department
of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - L. K. Ono
- Department
of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - L. Zhang
- Center
of Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - B. Roldan Cuenya
- Department
of Physics, University of Central Florida, Orlando, Florida 32816, United States
- Department
of Physics, Ruhr-University Bochum, 44780 Bochum, Germany
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35
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DeLaRiva AT, Hansen TW, Challa SR, Datye AK. In situ Transmission Electron Microscopy of catalyst sintering. J Catal 2013. [DOI: 10.1016/j.jcat.2013.08.018] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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36
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Ono LK, Behafarid F, Cuenya BR. Nano-gold diggers: Au-assisted SiO(2)-decomposition and desorption in supported nanocatalysts. ACS NANO 2013; 7:10327-34. [PMID: 24215320 DOI: 10.1021/nn404744b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
An investigation of the thermal stability of size-selected Au nanoparticles (NPs) synthesized via inverse micelle encapsulation and deposited on SiO2(4 nm)/Si(100) is presented. The size and mobility of individual Au NPs after annealing at elevated temperatures in ultrahigh vacuum (UHV) was monitored via atomic force microscopy (AFM). An enhanced thermal stability against coarsening and lack of NP mobility was observed up to 1343 K. In addition, a drastic decrease in the average NP height was detected with increasing annealing temperature, which was not accompanied by the sublimation of Au atoms/clusters in UHV. The apparent decrease in the Au NP height observed is assigned to their ability to dig vertical channels in the underlying SiO2 support. More specifically, a progressive reduction in the thickness of the SiO2 support underneath and in the immediate vicinity of the NPs was evidenced, leading to NPs partially sinking into the SiO2 substrate. The complete removal of silicon oxide in small patches was observed to take place around the Au NPs after annealing at 1343 K in UHV. These results reveal a Au-assisted oxygen desorption from the support via reverse oxygen spillover to the NPs.
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Affiliation(s)
- Luis K Ono
- Department of Physics, University of Central Florida , Orlando, Florida 32816, United States
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37
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Towards the Understanding of Sintering Phenomena at the Nanoscale: Geometric and Environmental Effects. Top Catal 2013. [DOI: 10.1007/s11244-013-0149-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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38
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Merte LR, Ahmadi M, Behafarid F, Ono LK, Lira E, Matos J, Li L, Yang JC, Roldan Cuenya B. Correlating Catalytic Methanol Oxidation with the Structure and Oxidation State of Size-Selected Pt Nanoparticles. ACS Catal 2013. [DOI: 10.1021/cs400234h] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lindsay R. Merte
- Department of Physics, University of Central Florida, Orlando, Florida 32816,
United States
| | - Mahdi Ahmadi
- Department of Physics, University of Central Florida, Orlando, Florida 32816,
United States
| | - Farzad Behafarid
- Department of Physics, University of Central Florida, Orlando, Florida 32816,
United States
| | - Luis K. Ono
- Department of Physics, University of Central Florida, Orlando, Florida 32816,
United States
| | - Estephania Lira
- Department of Physics, University of Central Florida, Orlando, Florida 32816,
United States
| | - Jeronimo Matos
- Department of Physics, University of Central Florida, Orlando, Florida 32816,
United States
| | - Long Li
- Department
of Chemical and Petroleum Engineering, Department of Physics, University of Pittsburgh, Pittsburgh, Pennsylvania
15261, United States
| | - Judith C. Yang
- Department
of Chemical and Petroleum Engineering, Department of Physics, University of Pittsburgh, Pittsburgh, Pennsylvania
15261, United States
| | - Beatriz Roldan Cuenya
- Department of Physics, University of Central Florida, Orlando, Florida 32816,
United States
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Samanta A, Devi RN. Pd Ultra-Small Clusters as Precursors for Silica-Encapsulated Pd Nanoreactors: Highly Sinter-Resistant Catalysts. ChemCatChem 2013. [DOI: 10.1002/cctc.201200908] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Porsgaard S, Merte LR, Ono LK, Behafarid F, Matos J, Helveg S, Salmeron M, Roldan Cuenya B, Besenbacher F. Stability of platinum nanoparticles supported on SiO2/Si(111): a high-pressure X-ray photoelectron spectroscopy study. ACS NANO 2012; 6:10743-10749. [PMID: 23140267 DOI: 10.1021/nn3040167] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The stability of Pt nanoparticles (NPs) supported on ultrathin SiO(2) films on Si(111) was investigated in situ under H(2) and O(2) (0.5 Torr) by high-pressure X-ray photoelectron spectroscopy (HP-XPS) and ex situ by atomic force microscopy (AFM). No indication of sintering was observed up to 600 °C in both reducing and oxidizing environments for size-selected Pt NPs synthesized by inverse micelle encapsulation. However, HP-XPS revealed a competing effect of volatile PtO(x) desorption from the Pt NPs (~2 and ~4 nm NP sizes) at temperatures above 450 °C in the presence of 0.5 Torr of O(2). Under oxidizing conditions, the entire NPs were oxidized, although with no indication of a PtO(2) phase, with XPS binding energies better matching PtO. The stability of catalytic NPs in hydrogenation and oxidation reactions is of great importance due to the strong structure sensitivity observed in a number of catalytic processes of industrial relevance. An optimum must be found between the maximization of the surface active sites and metal loading (i.e., minimization of the NP size), combined with the maximization of their stability, which, as it will be shown here, is strongly dependent on the reaction environment.
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Affiliation(s)
- Soeren Porsgaard
- Interdisciplinary Nanoscience Center (iNANO) and Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
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