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Vital CA, Buendía F, Beltrán MR. CO oxidation reactions on 3-d single metal atom catalysts/MgO(100). Phys Chem Chem Phys 2024; 26:18173-18181. [PMID: 38899760 DOI: 10.1039/d4cp00160e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
The present work deals with a comprehensive computational theoretical study of the molecular CO and O2 adsorption on 3d single atoms (M/MgO(100)). The study is based on the chemical elements of the 3d row, as they represent an economic advantage compared with the so-called noble metals. The present study has been performed employing density functional theory calculations. Through the representation of the metastable states, we perform a synergetic analysis of the CO oxidation reaction to find trends that suggest the possible use of new candidates such as Ni/MgO(100) or Cu/MgO(100) single-atom catalysts, for this type of redox reaction. We found that Ni and Cu produce energetically viable CO to CO2 reactions. Ni and Cu atoms show the greatest diffusion barrier and are the best candidates due to their low sintering capability. The energetic and electronic properties of the single Cu and Ni atoms on MgO (100) give them the best characteristics to help in the CO oxidation process.
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Affiliation(s)
- C A Vital
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, C.P. 04510, Ciudad de México, Mexico
| | - F Buendía
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore.
| | - M R Beltrán
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, C.P. 04510, Ciudad de México, Mexico
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2
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Huang L, Liu W, Xing X. Adsorption of O 2 on the Preferred -O-Au Sites of Small Gold Oxide Clusters: Charge-dependent Interaction and Activation. Molecules 2024; 29:1645. [PMID: 38611924 PMCID: PMC11013888 DOI: 10.3390/molecules29071645] [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: 03/12/2024] [Revised: 04/01/2024] [Accepted: 04/04/2024] [Indexed: 04/14/2024] Open
Abstract
Decades of research have illuminated the significant roles of gold/gold oxide clusters in small molecule catalytic oxidation. However, many fundamental questions, such as the actual sites to adsorb and activate O2 and the impact of charge, remain unanswered. Here, we have utilized an improved genetic algorithm program coupled with the DFT method to systematically search for the structures of Au1-5Ox-/+/0 (x = 1-4) and calculated binding interactions between Au1-5Ox-/+/0 (x = 1-2) and O2, aiming to determine the active sites and to elucidate the impact of different charge states in gold oxide systems. The results revealed that the reactivity of all three kinds of small gold oxide clusters toward O2 is strongly site-dependent, with clusters featuring an -O-Au site exhibiting a preference for adsorption. The charges on small gold oxide clusters significantly impact the interaction strength and the activation degree of adsorbed O2: in the case of anionic cluster, the interaction between O2 and the -O-Au sites leads to a chemical reaction involving electron transfer, thereby significantly activating O2; in neutral and cationic clusters, the adsorption of O2 on their -O-Au sites can be viewed as an electrostatic interaction. Pointedly, for cationic clusters, the highly concentrated positive charge on the Au atom of the -O-Au sites can strongly adsorb but hardly activate the adsorbed O2. These results have certain reference points for understanding the gold oxide interfaces and the improved catalytic oxidation performance of gold-based systems in the presence of atomic oxygen species.
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Affiliation(s)
| | | | - Xiaopeng Xing
- Shanghai Key Lab of Chemical Assessment and Sustainability, Department of Chemistry, Tongji University, 1239 Siping Road, Shanghai 200092, China; (L.H.); (W.L.)
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3
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Alam N, Noor T, Iqbal N. Catalyzing Sustainable Water Splitting with Single Atom Catalysts: Recent Advances. CHEM REC 2024; 24:e202300330. [PMID: 38372409 DOI: 10.1002/tcr.202300330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/17/2024] [Indexed: 02/20/2024]
Abstract
Electrochemical water splitting for sustainable hydrogen and oxygen production have shown enormous potentials. However, this method needs low-cost and highly active catalysts. Traditional nano catalysts, while effective, have limits since their active sites are mostly restricted to the surface and edges, leaving interior surfaces unexposed in redox reactions. Single atom catalysts (SACs), which take advantage of high atom utilization and quantum size effects, have recently become appealing electrocatalysts. Strong interaction between active sites and support in SACs have considerably improved the catalytic efficiency and long-term stability, outperforming their nano-counterparts. This review's first section examines the Hydrogen Evolution Reaction (HER) and the Oxygen Evolution Reaction (OER). In the next section, SACs are categorized as noble metal, non-noble metal, and bimetallic synergistic SACs. In addition, this review emphasizes developing methodologies for effective SAC design, such as mass loading optimization, electrical structure modulation, and the critical role of support materials. Finally, Carbon-based materials and metal oxides are being explored as possible supports for SACs. Importantly, for the first time, this review opens a discussion on waste-derived supports for single atom catalysts used in electrochemical reactions, providing a cost-effective dimension to this vibrant research field. The well-known design techniques discussed here may help in development of electrocatalysts for effective water splitting.
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Affiliation(s)
- Nasar Alam
- School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
| | - Tayyaba Noor
- School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
| | - Naseem Iqbal
- U.S.-Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
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4
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Hojo H, Nakashima M, Yoshizaki S, Einaga H. Lattice-Plane-Dependent Distribution of Ce 3+ at Pt and CeO 2 Interfaces for Pt/CeO 2 Catalysts. ACS NANO 2024. [PMID: 38285709 DOI: 10.1021/acsnano.3c09092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
The interaction between a metal and a support, which is known as the metal-support interaction, often plays a determining role in the catalytic properties of supported metal catalysts. Herein, we have developed model Pt/CeO2 catalysts, which enabled us to investigate the interface atomic and electronic structures between Pt and the {001}, {011}, and {111} planes of CeO2 using scanning transmission electron microscopy and electron energy-loss spectroscopy. We found that the number of Ce3+ ions around the Pt nanoparticles followed the order {001} > {011} > {111}, which was the opposite order of the generally accepted stability of low index surfaces of CeO2. Systematic first-principles calculations revealed that the presence of Pt nanoparticles facilitated the formation of oxygen vacancies and that the appearance of the Ptδ+ state was preferred when Pt nanoparticles were in contact with CeO2 {001} planes due to direct charge transfer from Pt to CeO2. These results provide important insights into the nature of the metal-support interaction for a comprehensive understanding of the properties of supported metal catalysts.
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Affiliation(s)
- Hajime Hojo
- Department of Advanced Materials Science and Engineering, Faculty of Engineering Sciences, Kyushu University, 6-1, Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - Minori Nakashima
- Department of Molecular and Material Sciences, Graduate School of Engineering Sciences, Kyushu University, 6-1, Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - Satoru Yoshizaki
- Department of Molecular and Material Sciences, Graduate School of Engineering Sciences, Kyushu University, 6-1, Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - Hisahiro Einaga
- Department of Advanced Materials Science and Engineering, Faculty of Engineering Sciences, Kyushu University, 6-1, Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
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5
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Liu Y, Ma C, Zhang J, Zhou H, Qin G, Li S. Tuning the electronic structure of Pd by the surface configuration of Al 2O 3 for hydrogenation reactions. NANOSCALE 2023; 16:335-342. [PMID: 38059873 DOI: 10.1039/d3nr05258c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
The electronic interaction between a metal and a support modulates the electronic structures of supported metals and plays an important role in manipulating their catalytic performance. However, this interaction is mainly realized in heterogeneous catalysts composed of reducible oxides. Herein, we demonstrate the electronic interaction between γ-Al2O3 and η-Al2O3 with varying acid-base properties and supported Pd nanoparticles (NPs) of 2 nm in size. The strength and number of acid-base sites on the supports and catalysts were systemically characterized by FT-IR spectroscopy and TPD. The supported Pd NPs exhibit electron-rich surface properties by receiving electrons from the electron-donating basic sites on γ-Al2O3, which are beneficial for catalyzing the hydrogenation of nitrobenzene. In contrast, Pd NPs loaded on η-Al2O3 are electron-deficient because of the rich electron-withdrawing acid sites of η-Al2O3. As a result, Pd/η-Al2O3 exhibits higher catalytic activity in phenylacetylene hydrogenation than Pd/γ-Al2O3. Our results suggest a promising route for designing high-performance catalysts by adjusting the acid-base properties of Al2O3 supports to maneuver the electronic structures of metals.
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Affiliation(s)
- Yinglei Liu
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Chicheng Ma
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Jiye Zhang
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Huiying Zhou
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Gaowu Qin
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
- Institute of Materials Intelligent Technology, Liaoning Academy of Materials, Shenyang 110004, China
| | - Song Li
- Key Lab for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
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Darkwah WK, Appiagyei AB, Puplampu JB, Otabil Bonsu J. Mechanistic Understanding of the Use of Single-Atom and Nanocluster Catalysts for Syngas Production via Partial Oxidation of Methane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37315185 DOI: 10.1021/acs.langmuir.2c03271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Single-atom and nanocluster catalysts presenting potent catalytic activity and excellent stability are used in high-temperature applications such as in structural composites, electrical devices, and catalytic chemical reactions. Recently, more attention has been drawn to application of these materials in clean fuel processing based on oxidation in terms of recovery and purification. The most popular media for catalytic oxidation reactions include gas phases, pure organic liquid phases, and aqueous solutions. It has been proven from the literature that catalysts are frequently selected as the finest in regulating organic wastewater, solar energy utilization, and environmental treatment applications in most catalytic oxidation of methane vis-à-vis photons and in environmental treatment applications. Single-atom and nanocluster catalysts have been engineered and applied in catalytic oxidations considering metal-support interactions and mechanisms facilitating catalytic deactivation. In this review, the present improvements on engineering single-atom and nano-catalysts are discussed. In detail, we summarize structure modification strategies, catalytic mechanisms, methods of synthesis, and application of single-atom and nano-catalysts for partial oxidation of methane (POM). We also present the catalytic performance of various atoms in the POM reaction. Full knowledge of the use of remarkable POM vis-à-vis the excellent structure is revealed. Based on the review conducted on single-atom and nanoclustered catalysts, we conclude their viability for POM reactions; however, the catalyst design must be carefully considered not only for isolating the individual influences from the active metal and support but also for incorporating the interactions of these components.
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Affiliation(s)
- Williams Kweku Darkwah
- School of Chemical Engineering, Faculty of Engineering, University of New South Wales Sydney, Kensington, Sydney, New South Wales 2052, Australia
- Department of Biochemistry, School of Biological Sciences, University of Cape Coast, Cape Coast 233, Ghana
| | - Alfred Bekoe Appiagyei
- Department of Chemical and Biological Engineering, Monash University, Wellington Road, Clayton, Melbourne, Victoria 3800, Australia
| | - Joshua B Puplampu
- Department of Biochemistry, School of Biological Sciences, University of Cape Coast, Cape Coast 233, Ghana
| | - Jacob Otabil Bonsu
- School of Chemical Engineering, Faculty of Engineering, University of New South Wales Sydney, Kensington, Sydney, New South Wales 2052, Australia
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7
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Yoon SH, Jeon JH, Cho SB, Nacpil EJC, Jeon I, Choi JB, Kim H. Extreme Gradient Boosting to Predict Atomic Layer Deposition for Platinum Nano-Film Coating. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:4984-4992. [PMID: 36947443 PMCID: PMC10100550 DOI: 10.1021/acs.langmuir.2c03465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/24/2023] [Indexed: 06/18/2023]
Abstract
Extreme gradient boosting (XGBoost) is an artificial intelligence algorithm capable of high accuracy and low inference time. The current study applies this XGBoost to the production of platinum nano-film coating through atomic layer deposition (ALD). In order to generate a database for model development, platinum is coated on α-Al2O3 using a rotary-type ALD equipment. The process is controlled by four parameters: process temperature, stop valve time, precursor pulse time, and reactant pulse time. A total of 625 samples according to different process conditions are obtained. The ALD coating index is used as the Al/Pt component ratio through ICP-AES analysis during postprocessing. The four process parameters serve as the input data and produces the Al/Pt component ratio as the output data. The postprocessed data set is randomly divided into 500 training samples and 125 test samples. XGBoost demonstrates 99.9% accuracy and a coefficient of determination of 0.99. The inference time is lower than that of random forest regression, in addition to a higher prediction safety than that of the light gradient boosting machine.
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Affiliation(s)
- Sung-Ho Yoon
- Electronic
Convergence Materials and Device Research Center, Korea Electronics Technology Institute, 25, Saenari-ro, Bundang-gu, Seongnam 13509, Republic
of Korea
- Mechanical
Engineering, Sungkyunkwan University, 2066 Seobu-ro,
Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
- Department
of Nano Engineering, Department of Nano Science and Technology, SKKU
Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Jun-Hyeok Jeon
- Electronic
Convergence Materials and Device Research Center, Korea Electronics Technology Institute, 25, Saenari-ro, Bundang-gu, Seongnam 13509, Republic
of Korea
- Mechanical
Engineering, Sungkyunkwan University, 2066 Seobu-ro,
Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Seung-Beom Cho
- Mechanical
Engineering, Sungkyunkwan University, 2066 Seobu-ro,
Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Edric John Cruz Nacpil
- Department
of Nano Engineering, Department of Nano Science and Technology, SKKU
Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Il Jeon
- Department
of Nano Engineering, Department of Nano Science and Technology, SKKU
Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Jae-Boong Choi
- Mechanical
Engineering, Sungkyunkwan University, 2066 Seobu-ro,
Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Hyeongkeun Kim
- Electronic
Convergence Materials and Device Research Center, Korea Electronics Technology Institute, 25, Saenari-ro, Bundang-gu, Seongnam 13509, Republic
of Korea
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8
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Deraet X, Turek J, Alonso M, Tielens F, Weckhuysen BM, Calatayud M, De Proft F. Understanding the Reactivity of Supported Late Transition Metals on a Bare Anatase (101) Surface: A Periodic Conceptual DFT Investigation. Chemphyschem 2023; 24:e202200785. [PMID: 36401599 DOI: 10.1002/cphc.202200785] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/17/2022] [Indexed: 11/21/2022]
Abstract
The rapidly growing interest for new heterogeneous catalytic systems providing high atomic efficiency along with high stability and reactivity triggered an impressive progress in the field of single-atom catalysis. Nevertheless, unravelling the factors governing the interaction strength between the support and the adsorbed metal atoms remains a major challenge. Based on periodic density functional theory (DFT) calculations, this paper provides insight into the adsorption of single late transition metals on a defect-free anatase surface. The obtained adsorption energies fluctuate, with the exception of Pd, between -3.11 and -3.80 eV and are indicative of a strong interaction. Depending on the considered transition metal, we could attribute the strength of this interaction with the support to i) an electron transfer towards anatase (Ru, Rh, Ni), ii) s-d orbital hybridisation effects (Pt), or iii) a synergistic effect between both factors (Fe, Co, Os, Ir). The driving forces behind the adsorption were also found to be strongly related to Klechkowsky's rule for orbital filling. In contrast, the deviating behaviour of Pd is most likely associated with the lower dissociation enthalpy of the Pd-O bond. Additionally, the reactivity of these systems was evaluated using the Fermi weighted density of states approach. The resulting softness values can be clearly related to the electron configuration of the catalytic systems as well as with the net charge on the transition metal. Finally, these indices were used to construct a model that predicts the adsorption strength of CO on these anatase-supported d-metal atoms. The values obtained from this regression model show, within a 95 % probability interval, a correlation of 84 % with the explicitly calculated CO adsorption energies.
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Affiliation(s)
- Xavier Deraet
- Department of General Chemistry (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, Elsene, 1050, Brussels, Belgium
| | - Jan Turek
- Department of General Chemistry (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, Elsene, 1050, Brussels, Belgium
| | - Mercedes Alonso
- Department of General Chemistry (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, Elsene, 1050, Brussels, Belgium
| | - Frederik Tielens
- Department of General Chemistry (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, Elsene, 1050, Brussels, Belgium
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Monica Calatayud
- Sorbonne Université, CNRS, Laboratoire de Chimie Théorique, LCT, 75005, Paris, France
| | - Frank De Proft
- Department of General Chemistry (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, Elsene, 1050, Brussels, Belgium
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9
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Luo Z, Wang J, Zhou W, Li J. Catalyst-Support Interactions Promoted Acidic Electrochemical Oxygen Evolution Catalysis: A Mini Review. Molecules 2023; 28:molecules28052262. [PMID: 36903508 PMCID: PMC10005733 DOI: 10.3390/molecules28052262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 02/23/2023] [Accepted: 02/26/2023] [Indexed: 03/06/2023] Open
Abstract
In the context of the growing human demand for green secondary energy sources, proton-exchange membrane water electrolysis (PEMWE) is necessary to meet the high-efficiency production of high-purity hydrogen required for proton-exchange membrane fuel cells (PEMFCs). The development of stable, efficient, and low-cost oxygen evolution reaction (OER) catalysts is key to promoting the large-scale application of hydrogen production by PEMWE. At present, precious metals remain irreplaceable in acidic OER catalysis, and loading the support body with precious metal components is undoubtedly an effective strategy to reduce costs. In this review, we will discuss the unique role of common catalyst-support interactions such as Metal-Support Interactions (MSIs), Strong Metal-Support Interactions (SMSIs), Strong Oxide-Support Interactions (SOSIs), and Electron-Metal-Support Interactions (EMSIs) in modulating catalyst structure and performance, thereby promoting the development of high-performance, high-stability, low-cost noble metal-based acidic OER catalysts.
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Affiliation(s)
- Zijie Luo
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Jia Wang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Wei Zhou
- School of Science, Wuhan University of Technology, Wuhan 430070, China
- Correspondence: (W.Z.); (J.L.)
| | - Junsheng Li
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
- Correspondence: (W.Z.); (J.L.)
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10
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Ashraf M, Ahmad MS, Inomata Y, Ullah N, Tahir MN, Kida T. Transition metal nanoparticles as nanocatalysts for Suzuki, Heck and Sonogashira cross-coupling reactions. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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11
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Longato A, Vanzan M, Colusso E, Corni S, Martucci A. Enhancing Tungsten Oxide Gasochromism with Noble Metal Nanoparticles: The Importance of the Interface. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205522. [PMID: 36464497 DOI: 10.1002/smll.202205522] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/04/2022] [Indexed: 06/17/2023]
Abstract
Crystalline tungsten trioxide (WO3 ) thin films covered by noble metal (gold and platinum) nanoparticles are synthesized via wet chemistry and used as optical sensors for gaseous hydrogen. Sensing performances are strongly influenced by the catalyst used, with platinum (Pt) resulting as best. Surprisingly, it is found that gold (Au) can provide remarkable sensing activity that tuned out to be strongly dependent on the nanoparticle size: devices sensitized with smaller nanoparticles display better H2 sensing performance. Computational insight based on density functional theory calculations suggested that this can be related to processes occurring specifically at the Au nanoparticle-WO3 interface (whose extent is in fact dependent on the nanoparticle size), where the hydrogen dissociative adsorption turns out to be possible. While both experiments and calculations single out Pt as better than Au for sensing, the present work reveals how an exquisitely nanoscopic effect can yield unexpected sensing performance for Au on WO3 , and how these performances can be tuned by controlling the nanoscale features of the system.
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Affiliation(s)
- Alessandro Longato
- Department of Industrial Engineering, University of Padova and INSTM, Via Marzolo, 9, Padova, 35131, Italy
| | - Mirko Vanzan
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, Padova, 35131, Italy
| | - Elena Colusso
- Department of Industrial Engineering, University of Padova and INSTM, Via Marzolo, 9, Padova, 35131, Italy
| | - Stefano Corni
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, Padova, 35131, Italy
- Center S3, CNR Institute of Nanoscience, Via Campi 213/A, Modena, 41125, Italy
| | - Alessandro Martucci
- Department of Industrial Engineering, University of Padova and INSTM, Via Marzolo, 9, Padova, 35131, Italy
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12
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Salvadori E, Bruzzese PC, Giamello E, Chiesa M. Single Metal Atoms on Oxide Surfaces: Assessing the Chemical Bond through 17O Electron Paramagnetic Resonance. Acc Chem Res 2022; 55:3706-3715. [PMID: 36442497 PMCID: PMC9774661 DOI: 10.1021/acs.accounts.2c00606] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
ConspectusEven in the gas phase single atoms possess catalytic properties, which can be crucially enhanced and modulated by the chemical interaction with a solid support. This effect, known as electronic metal-support interaction, encompasses charge transfer, orbital overlap, coordination structure, etc., in other words, all the crucial features of the chemical bond. These very features are the object of this Account, with specific reference to open-shell (paramagnetic) single metal atoms or ions on oxide supports. Such atomically dispersed species are part of the emerging class of heterogeneous catalysts known as single-atom catalysts (SACs). In these materials, atomic dispersion ensures maximum atom utilization and uniform active sites, whereby the nature of the chemical interaction between the metal and the oxide surface modulates the catalytic activity of the metal active site by tuning the energy of the frontier orbitals. A comprehensive set of examples includes fourth period metal atoms and ions in zeolites on insulating (e.g., MgO) or reducible (e.g., TiO2) oxides and are among the most relevant catalysts for a wealth of key processes of industrial and environmental relevance, from the abatement of NOx to the selective oxidation of hydrocarbons and the conversion of methane to methanol.There exist several spectroscopic techniques able to inform on the geometric and electronic structure of isolated single metal ion sites, but either they yield information averaged over the bulk or they lack description of the intimate features of chemical bonding, which include covalency, ionicity, electron and spin delocalization. All of these can be recovered at once by measuring the magnetic interactions between open-shell metals and the surrounding nuclei with Electron Paramagnetic Resonance (EPR) spectroscopy. In the case of oxides, this entails the synthesis of 17O isotopically enriched materials. We have established 17O EPR as a unique source of information about the local binding environment around oxygen of magnetic atoms or ions on different oxidic supports to rationalize structure-property relationships. Here, we will describe strategies for 17O surface enrichments and approaches to monitor the state of charge and spin delocalization of atoms or ions from K to Zn dispersed on oxide surfaces characterized by different chemical properties (i.e., basicity or reducibility). Emphasis is placed on chemical insight at the atomic-scale level achieved by 17O EPR, which is a crucial step in understanding the structure-property relationships of single metal atom catalysts and in enabling efficient design of future materials for a range of end uses.
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Affiliation(s)
- Enrico Salvadori
- Department
of Chemistry and NIS Centre of Excellence, University of Turin, via Giuria 9, 10125 Torino, Italy
| | - Paolo Cleto Bruzzese
- Department
of Chemistry and NIS Centre of Excellence, University of Turin, via Giuria 9, 10125 Torino, Italy,Felix
Bloch Institute for Solid State Physics, Leipzig University, Linnéstr. 5, 04103 Leipzig, Germany
| | - Elio Giamello
- Department
of Chemistry and NIS Centre of Excellence, University of Turin, via Giuria 9, 10125 Torino, Italy
| | - Mario Chiesa
- Department
of Chemistry and NIS Centre of Excellence, University of Turin, via Giuria 9, 10125 Torino, Italy,E-mail:
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13
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Shan J, Ye C, Zhu C, Dong J, Xu W, Chen L, Jiao Y, Jiang Y, Song L, Zhang Y, Jaroniec M, Zhu Y, Zheng Y, Qiao SZ. Integrating Interactive Noble Metal Single-Atom Catalysts into Transition Metal Oxide Lattices. J Am Chem Soc 2022; 144:23214-23222. [DOI: 10.1021/jacs.2c11374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jieqiong Shan
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA5005, Australia
| | - Chao Ye
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA5005, Australia
| | - Chongzhi Zhu
- Center for Electron Microscopy, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang310014, China
| | - Juncai Dong
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, China
| | - Wenjie Xu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei230029, China
| | - Ling Chen
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA5005, Australia
| | - Yan Jiao
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA5005, Australia
| | - Yunling Jiang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA5005, Australia
| | - Li Song
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei230029, China
| | - Yaning Zhang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, China
| | - Mietek Jaroniec
- Department of Chemistry and Biochemistry and Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, Ohio44242, United States
| | - Yihan Zhu
- Center for Electron Microscopy, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang310014, China
| | - Yao Zheng
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA5005, Australia
| | - Shi-Zhang Qiao
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA5005, Australia
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14
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Xiang G, Huo J, Liu Z. Understanding and application of metal-support interactions in catalysts for CO-PROX. Phys Chem Chem Phys 2022; 24:18454-18468. [PMID: 35913070 DOI: 10.1039/d2cp02035a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Preferential oxidation of carbon monoxide (CO-PROX) plays a vital role in H2 purification in the upstream systems of proton exchange membrane fuel cells (PEMFCs) for its high efficiency, low cost and practicability. The key to the application of CO-PROX is the design and preparation of catalysts, and the supported metal catalysts have been the mainstay after decades of development. The metal-support interaction (MSI), which acts as a bridge between the design of supported catalysts and atomic-level theoretical research, has triggered increasing attention. There is a growing body of literature that recognizes the importance of the MSI in heterogeneous catalysis. In this review, the impacts of the MSI including strong metal-support interactions and electronic metal-support interactions on the essential characteristics of supported single atom, nanocluster and nanoparticle catalysts, and therefore, on catalytic behaviors were discussed, respectively, primarily focusing on electron transfer, chemical bonding and the encapsulation of active sites induced by the MSI. We also presented an overview of how the MSI can be utilized to rationally design catalysts to meet target requirements such as high activity, selectivity or stability via appropriate selection and modification of support and active species. The perspectives of the future development for comprehensive understanding of the MSI were also proposed.
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Affiliation(s)
- Ganghua Xiang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China.
| | - Jia Huo
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China.
| | - Zhigang Liu
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China.
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15
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Davies AR, Azim H, Wright TG. Interactions in coinage-metal/ligand complexes, CM–L, and their cations (CM = Cu, Ag, Au; L = CO, N 2 and H 2). Mol Phys 2022. [DOI: 10.1080/00268976.2022.2101956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Alexander R. Davies
- School of Chemistry, University of Nottingham, University Park, Nottingham, UK
| | - Hiba Azim
- School of Chemistry, University of Nottingham, University Park, Nottingham, UK
| | - Timothy G. Wright
- School of Chemistry, University of Nottingham, University Park, Nottingham, UK
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16
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Fan B, Wang H, Han X, Deng Y, Hu W. Single atoms (Pt, Ir and Rh) anchored on activated NiCo LDH for alkaline hydrogen evolution reaction. Chem Commun (Camb) 2022; 58:8254-8257. [PMID: 35788581 DOI: 10.1039/d2cc02732a] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here, we report the synthesis of activated NiCo LDH to immobilize Pt, Ir and Rh single atoms for hydrogen evolution reaction. The Pt/A-NiCo LDH electrocatalyst exhibits the highest catalytic ability with a low overpotential of 16 mV to achieve a current density of 10 mA cm-2 and a mass activity about 24.8-fold that of commercial Pt/C. The results suggest that the Pt single atom catalyst can not only accelerate the Volmer steps in alkaline media, but also optimize the hydrogen adsorption process, improving the HER catalytic activity.
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Affiliation(s)
- Binbin Fan
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City, Fuzhou 350207, China
| | - Haozhi Wang
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City, Fuzhou 350207, China
| | - Xiaopeng Han
- School of Materials Science and Engineering Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China.
| | - Yida Deng
- School of Materials Science and Engineering Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China. .,School of Materials Science and Engineering, Hainan University, Haikou 570100, China
| | - Wenbin Hu
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City, Fuzhou 350207, China.,School of Materials Science and Engineering Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China.
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17
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Chatenet M, Pollet BG, Dekel DR, Dionigi F, Deseure J, Millet P, Braatz RD, Bazant MZ, Eikerling M, Staffell I, Balcombe P, Shao-Horn Y, Schäfer H. Water electrolysis: from textbook knowledge to the latest scientific strategies and industrial developments. Chem Soc Rev 2022; 51:4583-4762. [PMID: 35575644 PMCID: PMC9332215 DOI: 10.1039/d0cs01079k] [Citation(s) in RCA: 173] [Impact Index Per Article: 86.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Indexed: 12/23/2022]
Abstract
Replacing fossil fuels with energy sources and carriers that are sustainable, environmentally benign, and affordable is amongst the most pressing challenges for future socio-economic development. To that goal, hydrogen is presumed to be the most promising energy carrier. Electrocatalytic water splitting, if driven by green electricity, would provide hydrogen with minimal CO2 footprint. The viability of water electrolysis still hinges on the availability of durable earth-abundant electrocatalyst materials and the overall process efficiency. This review spans from the fundamentals of electrocatalytically initiated water splitting to the very latest scientific findings from university and institutional research, also covering specifications and special features of the current industrial processes and those processes currently being tested in large-scale applications. Recently developed strategies are described for the optimisation and discovery of active and durable materials for electrodes that ever-increasingly harness first-principles calculations and machine learning. In addition, a technoeconomic analysis of water electrolysis is included that allows an assessment of the extent to which a large-scale implementation of water splitting can help to combat climate change. This review article is intended to cross-pollinate and strengthen efforts from fundamental understanding to technical implementation and to improve the 'junctions' between the field's physical chemists, materials scientists and engineers, as well as stimulate much-needed exchange among these groups on challenges encountered in the different domains.
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Affiliation(s)
- Marian Chatenet
- University Grenoble Alpes, University Savoie Mont Blanc, CNRS, Grenoble INP (Institute of Engineering and Management University Grenoble Alpes), LEPMI, 38000 Grenoble, France
| | - Bruno G Pollet
- Hydrogen Energy and Sonochemistry Research group, Department of Energy and Process Engineering, Faculty of Engineering, Norwegian University of Science and Technology (NTNU) NO-7491, Trondheim, Norway
- Green Hydrogen Lab, Institute for Hydrogen Research (IHR), Université du Québec à Trois-Rivières (UQTR), 3351 Boulevard des Forges, Trois-Rivières, Québec G9A 5H7, Canada
| | - Dario R Dekel
- The Wolfson Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa, 3200003, Israel
- The Nancy & Stephen Grand Technion Energy Program (GTEP), Technion - Israel Institute of Technology, Haifa 3200003, Israel
| | - Fabio Dionigi
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Jonathan Deseure
- University Grenoble Alpes, University Savoie Mont Blanc, CNRS, Grenoble INP (Institute of Engineering and Management University Grenoble Alpes), LEPMI, 38000 Grenoble, France
| | - Pierre Millet
- Paris-Saclay University, ICMMO (UMR 8182), 91400 Orsay, France
- Elogen, 8 avenue du Parana, 91940 Les Ulis, France
| | - Richard D Braatz
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Martin Z Bazant
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Department of Mathematics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Michael Eikerling
- Chair of Theory and Computation of Energy Materials, Division of Materials Science and Engineering, RWTH Aachen University, Intzestraße 5, 52072 Aachen, Germany
- Institute of Energy and Climate Research, IEK-13: Modelling and Simulation of Materials in Energy Technology, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Iain Staffell
- Centre for Environmental Policy, Imperial College London, London, UK
| | - Paul Balcombe
- Division of Chemical Engineering and Renewable Energy, School of Engineering and Material Science, Queen Mary University of London, London, UK
| | - Yang Shao-Horn
- Research Laboratory of Electronics and Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Helmut Schäfer
- Institute of Chemistry of New Materials, The Electrochemical Energy and Catalysis Group, University of Osnabrück, Barbarastrasse 7, 49076 Osnabrück, Germany.
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18
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Kovarik S, Robles R, Schlitz R, Seifert TS, Lorente N, Gambardella P, Stepanow S. Electron Paramagnetic Resonance of Alkali Metal Atoms and Dimers on Ultrathin MgO. NANO LETTERS 2022; 22:4176-4181. [PMID: 35512394 DOI: 10.1021/acs.nanolett.2c00980] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Electron paramagnetic resonance (EPR) can provide unique insight into the chemical structure and magnetic properties of dopants in oxide and semiconducting materials that are of interest for applications in electronics, catalysis, and quantum sensing. Here, we demonstrate that EPR in combination with scanning tunneling microscopy (STM) allows for probing the bonding and charge state of alkali metal atoms on an ultrathin magnesium oxide layer on a Ag substrate. We observe a magnetic moment of 1 μB for Li2, LiNa, and Na2 dimers corresponding to spin radicals with a charge state of +1e. Single alkali atoms have the same charge state and no magnetic moment. The ionization of the adsorbates is attributed to charge transfer through the oxide to the metal substrate. Our work highlights the potential of EPR-STM to provide insight into dopant atoms that are relevant for the control of the electrical properties of surfaces and nanodevices.
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Affiliation(s)
- Stepan Kovarik
- Department of Materials, ETH Zurich, Hönggerbergring 64, Zürich CH-8093, Switzerland
| | - Roberto Robles
- Centro de Física de Materiales CFM/MPC (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, San Sebastián 20018, Spain
| | - Richard Schlitz
- Department of Materials, ETH Zurich, Hönggerbergring 64, Zürich CH-8093, Switzerland
| | - Tom Sebastian Seifert
- Department of Materials, ETH Zurich, Hönggerbergring 64, Zürich CH-8093, Switzerland
- Department of Physics, Freie Universität Berlin, Berlin 14195, Germany
| | - Nicolas Lorente
- Centro de Física de Materiales CFM/MPC (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, San Sebastián 20018, Spain
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, San Sebastián 20018, Spain
| | - Pietro Gambardella
- Department of Materials, ETH Zurich, Hönggerbergring 64, Zürich CH-8093, Switzerland
| | - Sebastian Stepanow
- Department of Materials, ETH Zurich, Hönggerbergring 64, Zürich CH-8093, Switzerland
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19
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Support effects on the dispersion and interaction of Ce and W species for NH3-SCR. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Shan J, Ye C, Jiang Y, Jaroniec M, Zheng Y, Qiao SZ. Metal-metal interactions in correlated single-atom catalysts. SCIENCE ADVANCES 2022; 8:eabo0762. [PMID: 35486734 PMCID: PMC9054016 DOI: 10.1126/sciadv.abo0762] [Citation(s) in RCA: 73] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Single-atom catalysts (SACs) include a promising family of electrocatalysts with unique geometric structures. Beyond conventional ones with fully isolated metal sites, an emerging class of catalysts with the adjacent metal single atoms exhibiting intersite metal-metal interactions appear in recent years and can be denoted as correlated SACs (C-SACs). This type of catalysts provides more opportunities to achieve substantial structural modification and performance enhancement toward a wider range of electrocatalytic applications. On the basis of a clear identification of metal-metal interactions, this review critically examines the recent research progress in C-SACs. It shows that the control of metal-metal interactions enables regulation of atomic structure, local coordination, and electronic properties of metal single atoms, which facilitate the modulation of electrocatalytic behavior of C-SACs. Last, we outline directions for future work in the design and development of C-SACs, which is indispensable for creating high-performing new SAC architectures.
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Affiliation(s)
- Jieqiong Shan
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Chao Ye
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Yunling Jiang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Mietek Jaroniec
- Department of Chemistry and Biochemistry and Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA
| | - Yao Zheng
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
- Corresponding author. (Y.Z.); (S.-Z.Q.)
| | - Shi-Zhang Qiao
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
- Corresponding author. (Y.Z.); (S.-Z.Q.)
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21
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Kang B, Vincent JL, Lee Y, Ke L, Crozier PA, Zhu Q. Modeling surface spin polarization on ceria-supported Pt nanoparticles. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:255002. [PMID: 35354123 DOI: 10.1088/1361-648x/ac62a3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 03/30/2022] [Indexed: 06/14/2023]
Abstract
In this work, we employ density functional theory simulations to investigate possible spin polarization of CeO2-(111) surface and its impact on the interactions between a ceria support and Pt nanoparticles. With a Gaussian type orbital basis, our simulations suggest that the CeO2-(111) surface exhibits a robust surface spin polarization due to the internal charge transfer between atomic Ce and O layers. In turn, it can lower the surface oxygen vacancy formation energy and enhance the oxide reducibility. We show that the inclusion of spin polarization can significantly reduce the major activation barrier in the proposed reaction pathway of CO oxidation on ceria-supported Pt nanoparticles. For metal-support interactions, surface spin polarization enhances the bonding between Pt nanoparticles and ceria surface oxygen, while CO adsorption on Pt nanoparticles weakens the interfacial interaction regardless of spin polarization. However, the stable surface spin polarization can only be found in the simulations based on the Gaussian type orbital basis. Given the potential importance in the design of future high-performance catalysts, our present study suggests a pressing need to examine the surface ferromagnetism of transition metal oxides in both experiment and theory.
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Affiliation(s)
- Byungkyun Kang
- Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154, United States of America
| | - Joshua L Vincent
- School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ 85281, United States of America
| | - Yongbin Lee
- Ames Laboratory, US Department of Energy, Ames, IA 50011, United States of America
| | - Liqin Ke
- Ames Laboratory, US Department of Energy, Ames, IA 50011, United States of America
| | - Peter A Crozier
- School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ 85281, United States of America
| | - Qiang Zhu
- Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154, United States of America
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22
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Three-Dimensional Pinecone-like Binder-Free Pt-TiO 2 Nanorods on Ti Mesh Structures: Synthesis, Characterization and Electroactivity towards Ethanol Oxidation. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27061921. [PMID: 35335284 PMCID: PMC8955681 DOI: 10.3390/molecules27061921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/02/2022] [Accepted: 03/13/2022] [Indexed: 11/17/2022]
Abstract
We report here the synthesis of binderless and template-less three-dimensional (3D) pinecone-shaped Pt/TiO2/Ti mesh structure. The TiO2 hydrothermally synthesized onto Ti mesh is composed of a mixture of flower-like nanorods and vertically aligned bar-shaped structures, whereas Pt film grown by pulsed laser deposition displays a smooth surface. XRD analyses reveal an average crystallite size of 41.4 nm and 68.5 nm of the TiO2 nanorods and Pt, respectively. In H2SO4 solution, the platinum oxide formation at the Pt/TiO2/Ti mesh electrode is 180 mV more negative than that at the Pt/Ti mesh electrode, indicating that TiO2 provides oxygeneous species at lower potentials, which will facilitate the removal of CO-like intermediates and accelerate an ethanol oxidation reaction (EOR). Indeed, the Pt/TiO2/Ti mesh catalyst exhibits current activity of 1.19 mA towards an EOR at a remarkably superior rate of 4.4 times that of the Pt/Ti mesh electrode (0.27 mA). Moreover, the presence of TiO2 as a support to Pt delivers a steady-state current of 2.1 mA, with an increment in durability of 6.6 times compared to Pt/Ti mesh (0.32 mA). Pt is chosen here as a benchmark catalyst and we believe that with catalysts that perform better than Pt, such 3D pinecone structures can be useful for a variety of catalytic or photoelectrochemical reactions.
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23
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Longo A, Giannici F, Casaletto MP, Rovezzi M, Sahle CJ, Glatzel P, Joly Y, Martorana A. Dynamic Role of Gold d-Orbitals during CO Oxidation under Aerobic Conditions. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05739] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alessandro Longo
- ESRF - The European Synchrotron, CS 40220, 38043 Cedex 9 Grenoble, France
- Istituto per lo Studio dei Materiali Nanostrutturati, Consiglio Nazionale delle Ricerche, Via Ugo La Malfa 153, 90146 Palermo, Italy
| | - Francesco Giannici
- Dipartimento di Fisica e Chimica, Università di Palermo, Viale delle Scienze, I-90128 Palermo, Italy
| | - Maria Pia Casaletto
- Istituto per lo Studio dei Materiali Nanostrutturati, Consiglio Nazionale delle Ricerche, Via Ugo La Malfa 153, 90146 Palermo, Italy
| | - Mauro Rovezzi
- ESRF - The European Synchrotron, CS 40220, 38043 Cedex 9 Grenoble, France
- Universitè Grenoble Alpes, CNRS, IRD, Irstea, Météo France, OSUG, FAME, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Christoph J. Sahle
- ESRF - The European Synchrotron, CS 40220, 38043 Cedex 9 Grenoble, France
| | - Pieter Glatzel
- ESRF - The European Synchrotron, CS 40220, 38043 Cedex 9 Grenoble, France
| | - Yves Joly
- Universitè Grenoble Alpes Inst NEEL, 38042 Grenoble (France) and CNRS, Inst NEEL, 38042 Grenoble, France
| | - Antonino Martorana
- Dipartimento di Fisica e Chimica, Università di Palermo, Viale delle Scienze, I-90128 Palermo, Italy
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24
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Construction of mesoporous ceria-supported gold catalysts with rich oxygen vacancies for efficient CO oxidation. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2021.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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25
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Kim T, Roy SB, Moon S, Yoo S, Choi H, Parale VG, Kim Y, Lee J, Jun SC, Kang K, Chun SH, Kanamori K, Park HH. Highly Dispersed Pt Clusters on F-Doped Tin(IV) Oxide Aerogel Matrix: An Ultra-Robust Hybrid Catalyst for Enhanced Hydrogen Evolution. ACS NANO 2022; 16:1625-1638. [PMID: 36350111 DOI: 10.1021/acsnano.1c10504] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Dispersing the minuscule mass loading without hampering the high catalytic activity and long-term stability of a noble metal catalyst results in its ultimate efficacy for the electrochemical hydrogen evolution reaction (HER). Despite being the most efficient HER catalyst, the use of Pt is curtailed due to its scarcity and tendency to leach out in the harsh electrochemical reaction environment. In this study, we combined F-doped tin(IV) oxide (F-SnO2) aerogel with Pt catalyst to prevent metallic corrosion and to achieve abundant Pt active sites (approximately 5 nm clusters) with large specific surface area (321 cm2·g-1). With nanoscopic Pt loading inside the SnO2 aerogel matrix, the as-synthesized hybrid F-SnO2@Pt possesses a large specific surface area and high porosity and, thus, exhibits efficient experimental and intrinsic HER activity (a low overpotential of 42 mV at 10 mA·cm-2 in 0.5 M sulfuric acid), a 22-times larger turnover frequency (11.2 H2·s-1) than that of Pt/C at 50 mV, and excellent robustness over 10,000 cyclic voltammetry cycles. The existing metal support interaction and strong intermolecular forces between Pt and F-SnO2 account for the catalytic superiority and persistence against corrosion of F-SnO2@Pt compared to commercially used Pt/C. Density functional theory analysis suggests that hybridization between the Pt and F-SnO2 orbitals enhances intermediate hydrogen atom (H*) adsorption at their interface, which improves the reaction kinetics.
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Affiliation(s)
- Taehee Kim
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
| | - Sanjib Baran Roy
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
| | - Sunil Moon
- Department of Mechanical Engineering, Yonsei University, Seoul 03722, Korea
| | - SangHyuk Yoo
- Department of Mechanical Engineering, Yonsei University, Seoul 03722, Korea
| | - Haryeong Choi
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
| | - Vinayak G Parale
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
| | - Younghun Kim
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
| | - Jihun Lee
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
| | - Seong Chan Jun
- Department of Mechanical Engineering, Yonsei University, Seoul 03722, Korea
| | - Keonwook Kang
- Department of Mechanical Engineering, Yonsei University, Seoul 03722, Korea
| | - Seung-Hyun Chun
- Department of Physics, Sejong University, Seoul 05006, Korea
| | | | - Hyung-Ho Park
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea
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26
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Pacchioni G. From Li clusters to nanocatalysis: A brief tour of 40 years of cluster chemistry. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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27
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Yamamoto M, Kuwabara A, Yoshida T. Influence of Ag Clusters on the Electronic Structures of β-Ga 2O 3 Photocatalyst Surfaces. ACS OMEGA 2021; 6:33701-33707. [PMID: 34926918 PMCID: PMC8675022 DOI: 10.1021/acsomega.1c04730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 11/23/2021] [Indexed: 06/14/2023]
Abstract
In order to understand the photocatalytic carbon dioxide reduction over Ag-loaded β-Ga2O3 photocatalysts, first principles calculations based on density functional theory were performed on the surface model of a Ag cluster-adsorbed β-Ga2O3 system. The stable adsorption structures of Ag n (n = 1 to 4) clusters on the β-Ga2O3 (100) surface were determined. In the electronic structure analysis, the valence states of all Ag clusters mixed with the top of the O 2p valence band of Ga2O3, leading the Fermi level of Ag n /β-Ga2O3 to shift to the bottom of the conduction band. It was also revealed that the unoccupied states of Ag n clusters overlapped with the Ga unoccupied states, and occupied electronic states of Ag clusters were formed in the band gap. These calculation results corresponded to the experimental ones obtained in our previous study, i.e., small Ag clusters had strong interaction with the Ga2O3 surface, enhancing the electron transfer between the Ag clusters and the Ga2O3 surface. That is, excited electrons toward Ag n clusters or the perimeter of Ag-Ga2O3 should be the important key to promote photocatalytic CO2 reduction.
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Affiliation(s)
- Muneaki Yamamoto
- Research
Center for Artificial Photosynthesis, Osaka
City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Akihide Kuwabara
- Nanostructures
Research Laboratory, Japan Fine Ceramics
Center, 2-4-1 Mutsuno,
Atsuta-ku, Nagoya 456-8587, Japan
| | - Tomoko Yoshida
- Research
Center for Artificial Photosynthesis, Osaka
City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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28
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Tosoni S, Di Liberto G, Pacchioni G. Structures and properties of Pd nanoparticles intercalated in layered TiO2: A computational study. Catal Today 2021. [DOI: 10.1016/j.cattod.2021.07.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Singh B, Singh A, Yadav A, Indra A. Modulating electronic structure of metal-organic framework derived catalysts for electrochemical water oxidation. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214144] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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30
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Etim UJ, Bai P, Gazit OM, Zhong Z. Low-Temperature Heterogeneous Oxidation Catalysis and Molecular Oxygen Activation. CATALYSIS REVIEWS 2021. [DOI: 10.1080/01614940.2021.1919044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ubong J. Etim
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, China
| | - Peng Bai
- College of Chemical Engineering, China University of Petroleum, Qingdao, China
| | - Oz M. Gazit
- Wolfson Faculty of Chemical Engineering, Technion – Israel Institute of Technology, Haifa, Israel
| | - Ziyi Zhong
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, China
- Technion Israel Institute of Technology (IIT), Haifa, Israel
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31
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Klein J, Kampermann L, Saddeler S, Korte J, Kowollik O, Smola T, Schulz S, Bacher G. Atmosphere-sensitive photoluminescence of Co x Fe 3-x O 4 metal oxide nanoparticles. RSC Adv 2021; 11:33905-33915. [PMID: 35497307 PMCID: PMC9042345 DOI: 10.1039/d1ra06228j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/11/2021] [Indexed: 12/21/2022] Open
Abstract
In this work the photoluminescence (PL) of Co x Fe3-x O4 spinel oxide nanoparticles under pulsed UV laser irradiation (λ exc = 270 nm) is investigated for varying Co/Fe ratios (x = 0.4⋯2.5). A broad emission in the green spectral range is observed, exhibiting two maxima at around 506 nm, which is dominant for Fe-rich nanoparticles (x = 0.4, 0.9), and at around 530 nm, that is more pronounced for Co-rich nanoparticles (x > 1.6). As examinations in different atmospheres show that the observed emission reacts sensitively to the presence of water, it is proposed that the emission is mainly caused by OH groups with terminal or bridging metal-O bonds on the Co x Fe3-x O4 surface. Raman spectroscopy supports that the emission maximum at 506 nm corresponds to terminal OH groups bound to metal cations on tetrahedral sites (i.e., Fe3+), while the maximum around 530 nm corresponds to terminal OH groups bound to metal cations on octahedral sites (i.e., Co3+). Photoinduced dehydroxylation shows that OH groups can be removed on Fe-rich nanoparticles more easily, leading to a conversion process and the formation of new OH groups with different bonds to the surface. As such behavior is not observed for Co x Fe3-x O4 with x > 1.6, we conclude that the OH groups are more stable against dehydroxylation on Co-rich nanoparticles. The higher OH stability is expected to lead to a higher catalytic activity of Co-rich cobalt ferrites in the electrochemical generation of oxygen.
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Affiliation(s)
- Julian Klein
- Werkstoffe der Elektrotechnik and CENIDE, Universität Duisburg-Essen Bismarckstraße 81 47057 Duisburg Germany
| | - Laura Kampermann
- Werkstoffe der Elektrotechnik and CENIDE, Universität Duisburg-Essen Bismarckstraße 81 47057 Duisburg Germany
| | - Sascha Saddeler
- Institute of Inorganic Chemistry and CENIDE, University of Duisburg-Essen Universitätsstraße 7 45141 Essen Germany
| | - Jannik Korte
- Werkstoffe der Elektrotechnik and CENIDE, Universität Duisburg-Essen Bismarckstraße 81 47057 Duisburg Germany
| | - Oliver Kowollik
- Werkstoffe der Elektrotechnik and CENIDE, Universität Duisburg-Essen Bismarckstraße 81 47057 Duisburg Germany
| | - Tim Smola
- Werkstoffe der Elektrotechnik and CENIDE, Universität Duisburg-Essen Bismarckstraße 81 47057 Duisburg Germany
| | - Stephan Schulz
- Institute of Inorganic Chemistry and CENIDE, University of Duisburg-Essen Universitätsstraße 7 45141 Essen Germany
| | - Gerd Bacher
- Werkstoffe der Elektrotechnik and CENIDE, Universität Duisburg-Essen Bismarckstraße 81 47057 Duisburg Germany
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32
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Han B, Yu B, Wang J, Liu M, Gao G, Xia K, Gao Q, Zhou C. Understanding the electronic metal-support interactions of the supported Ni cluster for the catalytic hydrogenation of ethylene. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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33
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Qawasmeh Y, Töpfer K, Serwatka T, Tremblay JC, Paulus B. Theoretical investigations of the interaction between diatomic molecules and coinage metal atoms. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1892224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Y. Qawasmeh
- Institut für Chemie und Biochemie, Freie Universität Berlin, Berlin, Germany
| | - K. Töpfer
- Institut für Chemie und Biochemie, Freie Universität Berlin, Berlin, Germany
| | - T. Serwatka
- Institut für Chemie und Biochemie, Freie Universität Berlin, Berlin, Germany
| | - J. C. Tremblay
- Laboratoire de Physique et Chimie Théoriques, CNRS-Université de Lorraine, Metz, France
| | - B. Paulus
- Institut für Chemie und Biochemie, Freie Universität Berlin, Berlin, Germany
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34
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Das T, Tosoni S, Pacchioni G. Role of support in tuning the properties of single atom catalysts: Cu, Ag, Au, Ni, Pd, and Pt adsorption on SiO 2/Ru, SiO 2/Pt, and SiO 2/Si ultrathin films. J Chem Phys 2021; 154:134706. [PMID: 33832274 DOI: 10.1063/5.0048104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The role of the support in tuning the properties of transition metal (TM) atoms is studied by means of density functional theory calculations. We have considered the adsorption of Cu, Ag, Au, Ni, Pd, and Pt atoms on crystalline silica bilayers, either free-standing or supported on Ru(0001) and Pt(111) metal surfaces. These systems have been compared with an hydroxylated SiO2/Si(100) film simulating the native oxide formed on a silicon wafer. The properties of the TM atoms change significantly on the various supports. While the unsupported silica bilayer weakly binds some of the TM atoms studied, the SiO2/Ru(0001) or SiO2/Pt(111) supports exhibit enhanced reactivity, sometimes resulting in a net electron transfer with the formation of charged species. Differences in the behavior of SiO2/Ru(0001) and SiO2/Pt(111) are rationalized in terms of different work functions and metal/oxide interfacial distances. No electron transfer is observed on the SiO2/Si(100) films. Here, the presence of hydroxyl groups on the surface provides relatively strong binding sites for the TM atoms that can be stabilized by the interaction with one or two OH groups. The final aspect that has been investigated is the porosity of the silica bilayer, at variance with the dense SiO2/Si(100) film. Depending on the atomic size, some TM atoms can penetrate spontaneously through the six-membered silica rings and become stabilized in the pores of the bilayer or at the SiO2/metal interface. This study shows how very different chemical properties can be obtained by depositing the same TM atom on different silica supports.
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Affiliation(s)
- Tilak Das
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano-Bicocca, via R. Cozzi, 55-20125 Milano, Italy
| | - Sergio Tosoni
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano-Bicocca, via R. Cozzi, 55-20125 Milano, Italy
| | - Gianfranco Pacchioni
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano-Bicocca, via R. Cozzi, 55-20125 Milano, Italy
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35
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Facet-Dependent Reactivity of Ceria Nanoparticles Exemplified by CeO2-Based Transition Metal Catalysts: A Critical Review. Catalysts 2021. [DOI: 10.3390/catal11040452] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The rational design and fabrication of highly-active and cost-efficient catalytic materials constitutes the main research pillar in catalysis field. In this context, the fine-tuning of size and shape at the nanometer scale can exert an intense impact not only on the inherent reactivity of catalyst’s counterparts but also on their interfacial interactions; it can also opening up new horizons for the development of highly active and robust materials. The present critical review, focusing mainly on our recent advances on the topic, aims to highlight the pivotal role of shape engineering in catalysis, exemplified by noble metal-free, CeO2-based transition metal catalysts (TMs/CeO2). The underlying mechanism of facet-dependent reactivity is initially discussed. The main implications of ceria nanoparticles’ shape engineering (rods, cubes, and polyhedra) in catalysis are next discussed, on the ground of some of the most pertinent heterogeneous reactions, such as CO2 hydrogenation, CO oxidation, and N2O decomposition. It is clearly revealed that shape functionalization can remarkably affect the intrinsic features and in turn the reactivity of ceria nanoparticles. More importantly, by combining ceria nanoparticles (CeO2 NPs) of specific architecture with various transition metals (e.g., Cu, Fe, Co, and Ni) remarkably active multifunctional composites can be obtained due mainly to the synergistic metalceria interactions. From the practical point of view, novel catalyst formulations with similar or even superior reactivity to that of noble metals can be obtained by co-adjusting the shape and composition of mixed oxides, such as Cu/ceria nanorods for CO oxidation and Ni/ceria nanorods for CO2 hydrogenation. The conclusions derived could provide the design principles of earth-abundant metal oxide catalysts for various real-life environmental and energy applications.
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36
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Bettahar MM. Role of H and OH surface species in the reduction of the C O double bond. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2020.111338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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37
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Chen K, Kim S, Rajendiran R, Prabakar K, Li G, Shi Z, Jeong C, Kang J, Li OL. Enhancing ORR/OER active sites through lattice distortion of Fe-enriched FeNi3 intermetallic nanoparticles doped N-doped carbon for high-performance rechargeable Zn-air battery. J Colloid Interface Sci 2021; 582:977-990. [DOI: 10.1016/j.jcis.2020.08.101] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 08/12/2020] [Accepted: 08/25/2020] [Indexed: 01/01/2023]
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38
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Pennington AM, Pitman CL, DeSario PA, Brintlinger TH, Jeon S, Balow RB, Pietron JJ, Stroud RM, Rolison DR. Photocatalytic CO Oxidation over Nanoparticulate Au-Modified TiO2 Aerogels: The Importance of Size and Intimacy. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03640] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ashley M. Pennington
- Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- National Research Council Postdoctoral Associate, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Catherine L. Pitman
- Former NRC Postdoctoral Associate, Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Paul A. DeSario
- Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Todd H. Brintlinger
- Materials Science and Technology Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Seokmin Jeon
- Former NRC Postdoctoral Associate, Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Robert B. Balow
- Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Jeremy J. Pietron
- Former Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Rhonda M. Stroud
- Materials Science and Technology Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Debra R. Rolison
- Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
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39
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Yang J, Li W, Wang D, Li Y. Electronic Metal-Support Interaction of Single-Atom Catalysts and Applications in Electrocatalysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2003300. [PMID: 33125802 DOI: 10.1002/adma.202003300] [Citation(s) in RCA: 199] [Impact Index Per Article: 49.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/08/2020] [Indexed: 05/03/2023]
Abstract
The electronic metal-support interaction (EMSI), which acts as a bridge between theoretical electronic study and the design of heterogenous catalysts, has attracted much attention. Utilizing the interaction between the metal and the support is one of the most essential strategies to enhance electrocatalytic efficiency due to structural and synergetic promotion. To date, as the ideal model for realizing EMSI, many types of single-atom catalysts (SACs) have been developed. The understanding of the electronic interaction on SACs has also been pushed to a higher level. However, systematic theories and operando experiments are seldom reported, and will be necessary to put forward and be carried out, respectively. Herein, the types, characterization, mechanism, and electrocatalytic applications of EMSI are comprehensively summarized and discussed. In addition to the basic information above, the challenges, opportunities, and future development of the EMSI on SACs are also proposed to present an overall view and reference to the later research.
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Affiliation(s)
- Jiarui Yang
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Wenhao Li
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Dingsheng Wang
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Yadong Li
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
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40
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Tang M, Yuan W, Ou Y, Li G, You R, Li S, Yang H, Zhang Z, Wang Y. Recent Progresses on Structural Reconstruction of Nanosized Metal Catalysts via Controlled-Atmosphere Transmission Electron Microscopy: A Review. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03335] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Min Tang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Wentao Yuan
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yang Ou
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Guanxing Li
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ruiyang You
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Songda Li
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hangsheng Yang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ze Zhang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yong Wang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
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41
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Wang Y, Duan X, Xie Y, Sun H, Wang S. Nanocarbon-Based Catalytic Ozonation for Aqueous Oxidation: Engineering Defects for Active Sites and Tunable Reaction Pathways. ACS Catal 2020. [DOI: 10.1021/acscatal.0c04232] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yuxian Wang
- State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing 102249, China
| | - Xiaoguang Duan
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Yongbing Xie
- Division of Environment Technology and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Hongqi Sun
- School of Engineering, Edith Cowan University, Joondalup, Western Australia 6027, Australia
| | - Shaobin Wang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, South Australia 5005, Australia
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42
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Schmies H, Bergmann A, Hornberger E, Drnec J, Wang G, Dionigi F, Kühl S, Sandbeck DJS, Mayrhofer KJJ, Ramani V, Cherevko S, Strasser P. Anisotropy of Pt nanoparticles on carbon- and oxide-support and their structural response to electrochemical oxidation probed by in situ techniques. Phys Chem Chem Phys 2020; 22:22260-22270. [PMID: 33001131 DOI: 10.1039/d0cp03233f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Identifying the structural response of nanoparticle-support ensembles to the reaction conditions is essential to determine their structure in the catalytically active state as well as to unravel the possible degradation pathways. In this work, we investigate the (electronic) structure of carbon- and oxide-supported Pt nanoparticles during electrochemical oxidation by in situ X-ray diffraction, absorption spectroscopy as well as the Pt dissolution rate by in situ mass spectrometry. We prepared ellipsoidal Pt nanoparticles by impregnation of the carbon and titanium-based oxide support as well as spherical Pt nanoparticles on an indium-based oxide support by a surfactant-assisted synthesis route. During electrochemical oxidation, we show that the oxide-supported Pt nanoparticles resist (bulk) oxide formation and Pt dissolution. The lattice of smaller Pt nanoparticles exhibits a size-induced lattice contraction in the as-prepared state with respect to bulk Pt but it expands reversibly during electrochemical oxidation. This expansion is suppressed for the Pt nanoparticles with a bulk-like relaxed lattice. We could correlate the formation of d-band vacancies in the metallic Pt with Pt lattice expansion. PtOx formation is strongest for platelet-like nanoparticles and we explain this with a higher fraction of exposed Pt(100) facets. Of all investigated nanoparticle-support ensembles, the structural response of RuO2/TiO2-supported Pt nanoparticles is the most promising with respect to their morphological and structural integrity under electrochemical reaction conditions.
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Affiliation(s)
- Henrike Schmies
- Department of Chemistry, Chemical Engineering Division, Technical University of Berlin, Berlin, Germany.
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43
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Baima J, Le HLT, Goniakowski J, Noguera C, Koltsov A, Mataigne JM. Theoretical study of metal/silica interfaces: Ti, Fe, Cr and Ni on β-cristobalite. Phys Chem Chem Phys 2020; 22:21453-21462. [PMID: 32945324 DOI: 10.1039/d0cp03216f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The understanding of interfacial effects and adhesion at oxide-metal contacts is of key importance in modern technology. Metal-silica interfaces specifically are relevant in electronics, catalysis and nanotechnology. However, adhesion at these interfaces is hindered by a formation of siloxane rings on the silica surface which saturate the dangling bonds at stoichiometric terminations. In this context, we report a thorough density functional theory study of the interaction between β-cristobalite and selected 3d transition metals under different oxygen conditions. For any given interface stoichiometry, we find a progressive decrease of the metal/silica interaction along the series, following the increase of metal electronegativity. Crucially, in presence of early transition metals (Ti or Cr) the surface siloxane rings are spontaneously broken, allowing for strong adhesion. Late transition metals interact only weakly with reconstructed surfaces, similarly to what was found for zinc. In absence of reconstruction, stoichiometric silica/metal contacts behave similarly to alumina/metal contacts, but display larger interactions across the interface. Based on these results, we show that early transition metal or stainless steel buffers can significantly improve the weak adhesion between silica and zinc, responsible for a poor performance of anti-corrosive galvanic zinc coatings on modern advanced high strength steels.
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Affiliation(s)
- Jacopo Baima
- CNRS and Sorbonne Université, UMR 7588, Institut des Nanosciences de Paris (INSP), 4 place Jussieu, 75005 Paris, France.
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44
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Siemer M, Tomaschun G, Klüner T, Christopher P, Al-Shamery K. Insights into Spectator-Directed Catalysis: CO Adsorption on Amine-Capped Platinum Nanoparticles on Oxide Supports. ACS APPLIED MATERIALS & INTERFACES 2020; 12:27765-27776. [PMID: 32432456 DOI: 10.1021/acsami.0c06086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Introducing spectator molecules to the surface of supported noble metal nanoparticles is an innovative approach to improve the selectivity of heterogeneous catalysts. Colloidal synthesis of the nanoparticles allows researchers to select the spectator and the nanoparticle size, as well as the subsequent particle loading on different supports under well-defined conditions. However, understanding the interplay of the various effects that spectators can have on the catalytic properties of metal surfaces still requires further development. In this work, dodecylamine (DDA) is used to develop insights into the influence of spectator species on the chemical properties of 1.4-3.7 nm colloidal Pt nanoparticles on different supports (powders of Al2O3, ZnO, and TiO2). DDA deposition results in two chemically distinct spectator species on the Pt surface depending on temperature, as evidenced from X-ray photoelectron spectroscopy (XPS). DDA selectively blocks terrace sites on the Pt nanoparticles at room temperature, as apparent from diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) with CO as a surface-sensitive probe molecule. The electron donor effect of the amine group in DDA influences the electron densities of the accessible lower coordinated, reactive Pt adsorption sites as indicated from spectral shifts in DRIFTS and XPS. Furthermore, DDA suppresses CO-induced surface reconstruction of the Pt surface and metal-support interactions, although these effects depend on temperature and support composition. Therefore, spectators may be used to adjust the nature of metal nanoparticle-oxidic support interactions. The experimental findings and mechanistic explanations are supported by density functional theory calculations. These results may build a platform in understanding the fundamental properties of amine spectators in Pt-based catalysis, activating specific sites, enhancing site selectivity, acting as sensors, and directing the metal-support interaction.
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Affiliation(s)
- Michael Siemer
- Department of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
| | - Gabriele Tomaschun
- Department of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
| | - Thorsten Klüner
- Department of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
| | - Phillip Christopher
- Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, California 92521, United States
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93117, United States
| | - Katharina Al-Shamery
- Department of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
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45
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Zhang Y, Zhao Y, Otroshchenko T, Perechodjuk A, Kondratenko VA, Bartling S, Rodemerck U, Linke D, Jiao H, Jiang G, Kondratenko EV. Structure–Activity–Selectivity Relationships in Propane Dehydrogenation over Rh/ZrO2 Catalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01455] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yaoyuan Zhang
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, People’s Republic of China
| | - Yun Zhao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
| | - Tatiana Otroshchenko
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
| | - Anna Perechodjuk
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
| | - Vita A. Kondratenko
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
| | - Stephan Bartling
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
| | - Uwe Rodemerck
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
| | - David Linke
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
| | - Guiyuan Jiang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, People’s Republic of China
| | - Evgenii V. Kondratenko
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
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46
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Sravan Kumar KB, Whittaker TN, Peterson C, Grabow LC, Chandler BD. Water Poisons H 2 Activation at the Au-TiO 2 Interface by Slowing Proton and Electron Transfer between Au and Titania. J Am Chem Soc 2020; 142:5760-5772. [PMID: 32083865 DOI: 10.1021/jacs.9b13729] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Understanding the dynamic changes at the active site during catalysis is a fundamental challenge that promises to improve catalytic properties. While performing Arrhenius studies during H2 oxidation over Au/TiO2 catalysts, we found different apparent activation energies (Eapp) depending on the feedwater pressure. This is partially attributed to changing numbers of metal-support interface (MSI) sites as water coverage changes with temperature. Constant water coverage studies showed two kinetic regimes: fast heterolytic H2 activation directly at the MSI (Eapp ∼ 25 kJ/mol) and significantly slower heterolytic H2 activation mediated by water (Eapp ∼ 45 kJ/mol). The two regimes had significantly different kinetics, suggesting a complicated mechanism of water poisoning. Density functional theory (DFT) showed water has minor effects on the reaction thermodynamics, primarily attributable to intrinsic differences in surface reactivity of different Au sites in the DFT model. The DFT model suggested significant surface restructuring of the TiO2 support during heterolytic H2 adsorption; evidence for this phenomenon was observed during in situ infrared spectroscopy experiments. A monolayer of water on the hydroxylated TiO2 surface increased the H2 dissociation activation barrier by ∼0.2 eV, in good agreement the difference in experimentally measured values. DFT calculations suggested H2 activation goes through a proton-coupled electron-transfer-like mechanism. During proton transfer to a basic support hydroxyl group, electron density is distributed through the gold nanorod and partially localized on the protonated support hydroxyl group. Water slows H2 activation by slowing this H+ transfer, forcing negative charge buildup on the Au and increasing the transition state energy.
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Affiliation(s)
- K B Sravan Kumar
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States.,Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | - Todd N Whittaker
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
| | - Christine Peterson
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
| | - Lars C Grabow
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | - Bert D Chandler
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
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Goodman KR, Wang J, Ma Y, Tong X, Stacchiola DJ, White MG. Morphology and reactivity of size-selected titanium oxide nanoclusters on Au(111). J Chem Phys 2020; 152:054714. [DOI: 10.1063/1.5134453] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Kenneth R. Goodman
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, USA
| | - Jason Wang
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, USA
| | - Yilin Ma
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, USA
| | - Xiao Tong
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Dario J. Stacchiola
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Michael G. White
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, USA
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, USA
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48
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Abstract
Methane activation chemistry, despite being widely reported in literature, remains to date a subject of debate. The challenges in this reaction are not limited to methane activation but extend to stabilization of the intermediate species. The low C-H dissociation energy of intermediates vs. reactants leads to CO2 formation. For selective oxidation, nature presents methane monooxygenase as a benchmark. This enzyme selectively consumes methane by breaking it down into methanol. To assemble an active site similar to monooxygenase, the literature reports Cu-ZSM-5, Fe-ZSM-5, and Cu-MOR, using zeolites and systems like CeO2/Cu2O/Cu. However, the trade-off between methane activation and methanol selectivity remains a challenge. Density functional theory (DFT) calculations and spectroscopic studies indicate catalyst reducibility, oxygen mobility, and water as co-feed as primary factors that can assist in enabling higher selectivity. The use of chemical looping can further improve selectivity. However, in all systems, improvements in productivity per cycle are required in order to meet the economical/industrial standards.
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Recent Advances on the Rational Design of Non-Precious Metal Oxide Catalysts Exemplified by CuOx/CeO2 Binary System: Implications of Size, Shape and Electronic Effects on Intrinsic Reactivity and Metal-Support Interactions. Catalysts 2020. [DOI: 10.3390/catal10020160] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Catalysis is an indispensable part of our society, massively involved in numerous energy and environmental applications. Although, noble metals (NMs)-based catalysts are routinely employed in catalysis, their limited resources and high cost hinder the widespread practical application. In this regard, the development of NMs-free metal oxides (MOs) with improved catalytic activity, selectivity and durability is currently one of the main research pillars in the area of heterogeneous catalysis. The present review, involving our recent efforts in the field, aims to provide the latest advances—mainly in the last 10 years—on the rational design of MOs, i.e., the general optimization framework followed to fine-tune non-precious metal oxide sites and their surrounding environment by means of appropriate synthetic and promotional/modification routes, exemplified by CuOx/CeO2 binary system. The fine-tuning of size, shape and electronic/chemical state (e.g., through advanced synthetic routes, special pretreatment protocols, alkali promotion, chemical/structural modification by reduced graphene oxide (rGO)) can exert a profound influence not only to the reactivity of metal sites in its own right, but also to metal-support interfacial activity, offering highly active and stable materials for real-life energy and environmental applications. The main implications of size-, shape- and electronic/chemical-adjustment on the catalytic performance of CuOx/CeO2 binary system during some of the most relevant applications in heterogeneous catalysis, such as CO oxidation, N2O decomposition, preferential oxidation of CO (CO-PROX), water gas shift reaction (WGSR), and CO2 hydrogenation to value-added products, are thoroughly discussed. It is clearly revealed that the rational design and tailoring of NMs-free metal oxides can lead to extremely active composites, with comparable or even superior reactivity than that of NMs-based catalysts. The obtained conclusions could provide rationales and design principles towards the development of cost-effective, highly active NMs-free MOs, paving also the way for the decrease of noble metals content in NMs-based catalysts.
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50
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Lykhach Y, Kubát J, Neitzel A, Tsud N, Vorokhta M, Skála T, Dvořák F, Kosto Y, Prince KC, Matolín V, Johánek V, Mysliveček J, Libuda J. Charge transfer and spillover phenomena in ceria-supported iridium catalysts: A model study. J Chem Phys 2019; 151:204703. [PMID: 31779319 DOI: 10.1063/1.5126031] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Iridium-based materials are among the most active bifunctional catalysts in heterogeneous catalysis and electrocatalysis. We have investigated the properties of atomically defined Ir/CeO2(111) model systems supported on Cu(111) and Ru(0001) by means of synchrotron radiation photoelectron spectroscopy, resonant photoemission spectroscopy, near ambient pressure X-ray photoelectron spectroscopy (NAP XPS), scanning tunneling microscopy, and temperature programmed desorption. Electronic metal-support interactions in the Ir/CeO2(111) system are accompanied by charge transfer and partial reduction of CeO2(111). The magnitude of the charge transfer depends strongly on the Ir coverage. The Ir/CeO2(111) system is stable against sintering upon annealing to 600 K in ultrahigh vacuum (UHV). Annealing of Ir/CeO2(111) in UHV triggers the reverse oxygen spillover above 450 K. The interaction of hydrogen with Ir/CeO2(111) involves hydrogen spillover and reversible spillover between 100 and 400 K accompanied by the formation of water above 190 K. Formation of water coupled with the strong reduction of CeO2(111) represents the dominant reaction channel upon annealing in H2 above 450 K. The interaction of Ir/CeO2(111) with oxygen has been investigated at moderate and NAP conditions. Additionally, the formation and stability of iridium oxide prepared by deposition of Ir in oxygen atmosphere was investigated upon annealing in UHV and under exposure to H2. The oxidation of Ir nanoparticles under NAP conditions yields stable IrOx nanoparticles. The stability of Ir and IrOx nanoparticles under oxidizing conditions is hampered, however, by encapsulation by cerium oxide above 450 K and additionally by copper and ruthenium oxides under NAP conditions.
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Affiliation(s)
- Yaroslava Lykhach
- Interface Research and Catalysis, Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Jan Kubát
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
| | - Armin Neitzel
- Interface Research and Catalysis, Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Nataliya Tsud
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
| | - Mykhailo Vorokhta
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
| | - Tomáš Skála
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
| | - Filip Dvořák
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
| | - Yuliia Kosto
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
| | - Kevin C Prince
- Elettra-Sincrotrone Trieste SCpA, Strada Statale 14, km 163.5, 34149 Basovizza-Trieste, Italy
| | - Vladimír Matolín
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
| | - Viktor Johánek
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
| | - Josef Mysliveček
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
| | - Jörg Libuda
- Interface Research and Catalysis, Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
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