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Li J, Wang X, Yu J, Xu K, Jia Z, Li H, Ren L, Yang Y, Chang K, Li Y, Liu X, Lu J, Liu S. A Nanostructured Ru-Mn-Nb Alloy with Oxygen-Enriched Boundaries for Ampere-Level Hydrogen Evolution. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2025:e2501976. [PMID: 40285554 DOI: 10.1002/advs.202501976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2025] [Revised: 03/09/2025] [Indexed: 04/29/2025]
Abstract
Development of active and cost-effective electrocatalysts to substitute platinum-based catalysts in alkaline hydrogen evolution reactions (HERs) remains a challenge. The synergistic effect between different elements in alloy catalysts can regulate electronic structure and thereby provide an abundance of catalytic sites for reactions. Thus, alloy catalysts are suitable candidates for future energy applications. Conventional methods for enhancing the performance of alloy catalysts have mainly focused on element composition and thus have often neglected to examine catalyst design. In this paper, a ruthenium-manganese-niobium alloy catalyst (Ru62Mn12Nb21O5) is reported with a supra-nanocrystalline dual-phase structure that is fabricated through combinatorial magnetron co-sputtering at ambient temperatures. The induced crystal-crystal heterostructure of Ru62Mn12Nb21O5 reduced system energy, thereby achieving balance between stability and catalytic activity. Ru62Mn12Nb21O5 exhibited excellent HER performance, as demonstrated by low HER overpotential (18 mV at 10 mA cm-2) and robust stability (300 h at 1.2 A cm-2). Moreover, oxygen-rich interfaces in Ru62Mn12Nb21O5 enhanced charge transfer and the kinetics of water dissociation as well as optimized hydrogen adsorption/desorption processes, thus boosting HER performance. The crystal-crystal heterostructure and oxygen-rich interfaces in Ru62Mn12Nb21O5 are induced by its dual-phase nanocrystalline structure, which represents a new structural design for enhancing the performance of catalysts for sustainable energy development.
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Affiliation(s)
- Jie Li
- Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, China
| | - Xue Wang
- Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China
| | - Jun Yu
- Laboratory for Multiscale Mechanics and Medical Science, SV LAB, School of Aerospace, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Kai Xu
- Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China
| | - Zhe Jia
- School of Materials Science and Engineering, Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing, 211189, China
| | - Hongkun Li
- Hong Kong Branch of National Precious Metals Material Engineering Research Center, City University of Hong Kong, Hong Kong SAR, China
| | - Lei Ren
- Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, China
| | - Yiyuan Yang
- School of Materials Science and Engineering, Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing, 211189, China
| | - Keke Chang
- Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China
| | - Yangyang Li
- Hong Kong Branch of National Precious Metals Material Engineering Research Center, City University of Hong Kong, Hong Kong SAR, China
| | - Xiangfa Liu
- Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, China
| | - Jian Lu
- Hong Kong Branch of National Precious Metals Material Engineering Research Center, City University of Hong Kong, Hong Kong SAR, China
| | - Sida Liu
- Laboratory for Multiscale Mechanics and Medical Science, SV LAB, School of Aerospace, Xi'an Jiaotong University, Xi'an, 710049, China
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2
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Wang WL, Gong CY, Guo SJ, Fan Z, Wu YB, Liu S, He Y, Jiang GM, Zhang JZ. Oxygen Species Enhanced Catalytic Efficiency of Au 1Ag x/SiO 2 Catalysts for CO Oxidation. J Phys Chem Lett 2025; 16:3698-3704. [PMID: 40184429 DOI: 10.1021/acs.jpclett.4c03601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2025]
Abstract
A series of Au1Agx alloys (x = 0, 0.2, 0.3, 1.0, and 3.0) supported over SiO2 has been prepared and pretreated via different atmospheric processes. The physical-chemical properties of these materials have been systematically characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible (UV-vis) spectroscopy, and transmission electron microscopy (TEM). The results reveal that oxygen species are doped into the alloy structure by the oxygen-involved pretreatment, leading to lattice expansion as well as a significant increase in catalytic activity. Improvement in the catalytic activity of Au1Ag0.3/SiO2 through sequential reduction and oxidation pretreatment was evidenced by a decrease in the temperature of 100% CO conversion by approximately 500 K. A volcano trend in catalytic activity is found as the Ag composition is increased in the alloy structure. Density-functional theory (DFT) calculations suggest that the introduced oxygen species are likely present at the subsurface of the AuAg alloy and involved in the reaction or in modifying the electronic structure of surface Ag, thereby enhancing the catalytic activity for CO oxidation.
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Affiliation(s)
- Wei Lu Wang
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Technology and Business University, Chongqing, 400067, China
| | - Chen Yang Gong
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Technology and Business University, Chongqing, 400067, China
| | - Si Jie Guo
- Department of Chemistry and Chemical Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Zhong Fan
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Technology and Business University, Chongqing, 400067, China
| | - Yong Bin Wu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Shuang Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Yang He
- Chemical Sciences Division and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Guang Ming Jiang
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Technology and Business University, Chongqing, 400067, China
| | - Jin Zhong Zhang
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
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Yu W, Yue S, Yang M, Hashimoto M, Liu P, Zhu L, Xie W, Jones T, Willinger M, Huang X. Operando TEM study of a working copper catalyst during ethylene oxidation. Nat Commun 2025; 16:2029. [PMID: 40016265 PMCID: PMC11868487 DOI: 10.1038/s41467-025-57418-0] [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: 07/27/2024] [Accepted: 02/19/2025] [Indexed: 03/01/2025] Open
Abstract
Active catalysts are typically metastable, and their surface state depends on the gas-phase chemical potential and reaction kinetics. To gain relevant insights into structure-performance relationships, it is essential to investigate catalysts under their operational conditions. Here, we use operando TEM combining real-time observations with online mass spectrometry (MS) to study a Cu catalyst during ethylene oxidation. We identify three distinct regimes characterized by varying structures and states that show different selectivities with temperature, and elucidate the reaction pathways with the aid of theoretical calculations. Our findings reveal that quasi-static Cu2O at low temperatures is selective towards ethylene oxide (EO) and acetaldehyde (AcH) via an oxometallacycle (OMC) pathway. In the dynamic Cu0/Cu2O oscillation regime at medium temperatures, partially reduced and strained oxides decrease the activation energies associated with partial oxidation. At high temperatures, the catalyst is predominantly Cu0, partially covered by a monolayer Cu2O. While Cu0 is extremely efficient in dehydrogenation and eventual combustion, the monolayer oxide favors direct EO formation. These results challenge conclusions drawn from ultra-high vacuum studies that suggested metallic copper would be a selective epoxidation catalyst and highlight the need for operando study under realistic conditions.
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Affiliation(s)
- Wenqian Yu
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Shengnan Yue
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Minghe Yang
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | | | - Panpan Liu
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Li Zhu
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Wangjing Xie
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Travis Jones
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, USA.
| | - Marc Willinger
- Department of Chemistry, Technical University of Munich, Garching, Germany.
- Scientific Center for Optical and Electron Microscopy, ETH Zurich, Zurich, Switzerland.
| | - Xing Huang
- College of Chemistry, Fuzhou University, Fuzhou, China.
- Qingyuan Innovation Laboratory, Quanzhou, China.
- Scientific Center for Optical and Electron Microscopy, ETH Zurich, Zurich, Switzerland.
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Routh PK, Redekop E, Prodinger S, van der Hoeven JES, Lim KRG, Aizenberg J, Nachtegaal M, Clark AH, Frenkel AI. Restructuring dynamics of surface species in bimetallic nanoparticles probed by modulation excitation spectroscopy. Nat Commun 2024; 15:6736. [PMID: 39112484 PMCID: PMC11306641 DOI: 10.1038/s41467-024-51068-4] [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: 01/09/2024] [Accepted: 07/29/2024] [Indexed: 08/10/2024] Open
Abstract
Restructuring of metal components on bimetallic nanoparticle surfaces in response to the changes in reactive environment is a ubiquitous phenomenon whose potential for the design of tunable catalysts is underexplored. The main challenge is the lack of knowledge of the structure, composition, and evolution of species on the nanoparticle surfaces during reaction. We apply a modulation excitation approach to the X-ray absorption spectroscopy of the 30 atomic % Pd in Au supported nanocatalysts via the gas (H2 and O2) concentration modulation. For interpreting restructuring kinetics, we correlate the phase-sensitive detection with the time-domain analysis aided by a denoising algorithm. Here we show that the surface and near-surface species such as Pd oxides and atomically dispersed Pd restructured periodically, featuring different time delays. We propose a model that Pd oxide formation is preceded by the build-up of Pd regions caused by oxygen-driven segregation of Pd atoms towards the surface. During the H2 pulse, rapid reduction and dissolution of Pd follows an induction period which we attribute to H2 dissociation. Periodic perturbations of nanocatalysts by gases can, therefore, enable variations in the stoichiometry of the surface and near-surface oxides and dynamically tune the degree of oxidation/reduction of metals at/near the catalyst surface.
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Affiliation(s)
- Prahlad K Routh
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Evgeniy Redekop
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, N-0315, Oslo, Norway
| | - Sebastian Prodinger
- Centre for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, N-0315, Oslo, Norway
| | - Jessi E S van der Hoeven
- Materials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Kang Rui Garrick Lim
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Joanna Aizenberg
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
| | | | - Adam H Clark
- Paul Scherrer Institut (PSI), Villigen, CH-5232, Switzerland
| | - Anatoly I Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA.
- Division of Chemistry, Brookhaven National Laboratory, Upton, NY, 11973, USA.
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5
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Lin Z, Sathishkumar N, Xia Y, Li S, Liu X, Mao J, Shi H, Lu G, Wang T, Wang HL, Huang Y, Elbaz L, Li Q. Tailoring Zirconia Supported Intermetallic Platinum Alloy via Reactive Metal-Support Interactions for High-Performing Fuel Cells. Angew Chem Int Ed Engl 2024; 63:e202400751. [PMID: 38634352 DOI: 10.1002/anie.202400751] [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: 04/27/2024] [Revised: 03/05/2024] [Accepted: 04/17/2024] [Indexed: 04/19/2024]
Abstract
Developing efficient and anti-corrosive oxygen reduction reaction (ORR) catalysts is of great importance for the applications of proton exchange membrane fuel cells (PEMFCs). Herein, we report a novel approach to prepare metal oxides supported intermetallic Pt alloy nanoparticles (NPs) via the reactive metal-support interaction (RMSI) as ORR catalysts, using Ni-doped cubic ZrO2 (Ni/ZrO2) supported L10-PtNi NPs as a proof of concept. Benefiting from the Ni migration during RMSI, the oxygen vacancy concentrations in the support are increased, leading to an electron enrichment of Pt. The optimal L10-PtNi-Ni/ZrO2-RMSI catalyst achieves remarkably low mass activity (MA) loss (17.8 %) after 400,000 accelerated durability test cycles in a half-cell and exceptional PEMFC performance (MA=0.76 A mgPt -1 at 0.9 V, peak power density=1.52/0.92 W cm-2 in H2-O2/-air, and 18.4 % MA decay after 30,000 cycles), representing the best reported Pt-based ORR catalysts without carbon supports. Density functional theory (DFT) calculations reveal that L10-PtNi-Ni/ZrO2-RMSI requires a lower energetic barrier for ORR than L10-PtNi-Ni/ZrO2 (direct loading), which is ascribed to a decreased Bader charge transfer between Pt and *OH, and the improved stability of L10-PtNi-Ni/ZrO2-RMSI compared to L10-PtNi-C can be contributed to the increased adhesion energy and Ni vacancy formation energy within the PtNi alloy.
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Affiliation(s)
- Zijie Lin
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Nadaraj Sathishkumar
- Department of Physics and Astronomy, California State University Northridge, 91330, Northridge, CA, USA
| | - Yu Xia
- Department of Materials Science and Engineering, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Shenzhou Li
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Xuan Liu
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Jialun Mao
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Hao Shi
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Gang Lu
- Department of Physics and Astronomy, California State University Northridge, 91330, Northridge, CA, USA
| | - Tanyuan Wang
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Hsing-Lin Wang
- Department of Materials Science and Engineering, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Yunhui Huang
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Lior Elbaz
- Department of Chemistry and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, 5290002, Ramat-Gan, Israel
| | - Qing Li
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
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6
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Yue S, Praveen CS, Klyushin A, Fedorov A, Hashimoto M, Li Q, Jones T, Liu P, Yu W, Willinger MG, Huang X. Redox dynamics and surface structures of an active palladium catalyst during methane oxidation. Nat Commun 2024; 15:4678. [PMID: 38824167 PMCID: PMC11144237 DOI: 10.1038/s41467-024-49134-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 05/21/2024] [Indexed: 06/03/2024] Open
Abstract
Catalysts based on palladium are among the most effective in the complete oxidation of methane. Despite extensive studies and notable advances, the nature of their catalytically active species and conceivable structural dynamics remains only partially understood. Here, we combine operando transmission electron microscopy (TEM) with near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and density functional theory (DFT) calculations to investigate the active state and catalytic function of Pd nanoparticles (NPs) under methane oxidation conditions. We show that the particle size, phase composition and dynamics respond appreciably to changes in the gas-phase chemical potential. In combination with mass spectrometry (MS) conducted simultaneously with in situ observations, we uncover that the catalytically active state exhibits phase coexistence and oscillatory phase transitions between Pd and PdO. Aided by DFT calculations, we provide a rationale for the observed redox dynamics and demonstrate that the emergence of catalytic activity is related to the dynamic interplay between coexisting phases, with the resulting strained PdO having more favorable energetics for methane oxidation.
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Affiliation(s)
- Shengnan Yue
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - C S Praveen
- International School of Photonics, Cochin University of Science and Technology, Cochin, Kerala, India
| | | | - Alexey Fedorov
- Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | | | - Qian Li
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Travis Jones
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, USA.
| | - Panpan Liu
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Wenqian Yu
- College of Chemistry, Fuzhou University, Fuzhou, China
- Qingyuan Innovation Laboratory, Quanzhou, China
| | - Marc-Georg Willinger
- Scientific Center for Optical and Electron Microscopy, ETH Zurich, Zurich, Switzerland
- Department of Chemistry, Technical University of Munich, Garching, Germany
| | - Xing Huang
- College of Chemistry, Fuzhou University, Fuzhou, China.
- Qingyuan Innovation Laboratory, Quanzhou, China.
- Scientific Center for Optical and Electron Microscopy, ETH Zurich, Zurich, Switzerland.
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7
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Ma X, Ma C, Xia J, Han S, Zhang H, He C, Feng F, Lin G, Cao W, Meng X, Zhu L, Zhu X, Wang AL, Yin H, Lu Q. Heterophase Intermetallic Compounds for Electrocatalytic Hydrogen Production at Industrial-Scale Current Densities. J Am Chem Soc 2024. [PMID: 38767649 DOI: 10.1021/jacs.4c01985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Heterophase nanomaterials have sparked significant research interest in catalysis due to their distinctive properties arising from synergistic effects of different components and the formed phase boundary. However, challenges persist in the controlled synthesis of heterophase intermetallic compounds (IMCs), primarily due to the lattice mismatch of distinct crystal phases and the difficulty in achieving precise control of the phase transitions. Herein, orthorhombic/cubic Ru2Ge3/RuGe IMCs with engineered boundary architecture are synthesized and anchored on the reduced graphene oxide. The Ru2Ge3/RuGe IMCs exhibit excellent hydrogen evolution reaction (HER) performance with a high current density of 1000 mA cm-2 at a low overpotential of 135 mV. The presence of phase boundaries enhances charge transfer and improves the kinetics of water dissociation while optimizing the processes of hydrogen adsorption/desorption, thus boosting the HER performance. Moreover, an anion exchange membrane electrolyzer is constructed using Ru2Ge3/RuGe as the cathode electrocatalyst, which achieves a current density of 1000 mA cm-2 at a low voltage of 1.73 V, and the activity remains virtually undiminished over 500 h.
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Affiliation(s)
- Xiao Ma
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Chaoqun Ma
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jing Xia
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Sumei Han
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Huaifang Zhang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Caihong He
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Fukai Feng
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Gang Lin
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Wenbin Cao
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiangmin Meng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Lijie Zhu
- School of Instrument Science and Optoelectronics Engineering, Beijing Information Science and Technology University, Beijing 100192, China
| | - Xiaojuan Zhu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - An-Liang Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Haiqing Yin
- Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Qipeng Lu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Shunde Innovation School, University of Science and Technology Beijing, Foshan 528399, China
- State Key Laboratory of Nuclear Power Safety Technology and Equipment, University of Science and Technology Beijing, Beijing 100083, China
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8
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Zhang L, Niu Y, Pu Y, Wang Y, Dong S, Liu Y, Zhang B, Liu ZW. In Situ Visualization and Mechanistic Understandings on Facet-Dependent Atomic Redispersion of Platinum on CeO 2. NANO LETTERS 2023; 23:11999-12005. [PMID: 38100577 DOI: 10.1021/acs.nanolett.3c04008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
Redispersion is an effective method for regeneration of sintered metal-supported catalysts. However, the ambiguous mechanistic understanding hinders the delicate controlling of active metals at the atomic level. Herein, the redispersion mechanism of atomically dispersed Pt on CeO2 is revealed and manipulated by in situ techniques combining well-designed model catalysts. Pt nanoparticles (NPs) sintered on CeO2 nano-octahedra under reduction and oxidation conditions, while redispersed on CeO2 nanocubes above ∼500 °C in an oxidizing atmosphere. The dynamic shrinkage and disappearance of Pt NPs on CeO2 (100) facets was directly visualized by in situ TEM. The generated atomically dispersed Pt with the square-planar [PtO4]2+ structure on CeO2 (100) facets was also confirmed by combining Cs-corrected STEM and spectroscopy techniques. The redispersion and atomic control were ascribed to the high mobility of PtO2 at high temperatures and its strong binding with square-planar O4 sites over CeO2 (100). These understandings are important for the regulation of atomically dispersed platinum catalysts.
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Affiliation(s)
- Lei Zhang
- Key Laboratory of Syngas Conversion of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
| | - Yiming Niu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Yinghui Pu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Yongzhao Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Shaoming Dong
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Yuefeng Liu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Bingsen Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Zhong-Wen Liu
- Key Laboratory of Syngas Conversion of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
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9
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Yi Z, Lin L, Luo X, Ning Y, Fu Q. Oxide-Metal Interaction Probed by Scanning Tunneling Microscope Manipulation of Cr 2O 7 Clusters on Au(111). J Phys Chem Lett 2023; 14:2163-2170. [PMID: 36808987 DOI: 10.1021/acs.jpclett.3c00184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Interfacial interaction plays a crucial rule in catalysis over supported catalysts, and the catalyst-support interaction needs to be explored at microscopic scale. Here, we use the scanning tunneling microscope (STM) tip to manipulate Cr2O7 dinuclear clusters on Au(111) and find that the Cr2O7-Au interaction can be weakened by an electric field in the STM junction, facilitating rotation and translation of the individual clusters at the imaging temperature (78 K). Surface alloying with Cu makes the manipulation of the Cr2O7 clusters hard due to the enhanced Cr2O7-substrate interaction. Density functional theory calculations reveal that barrier for translation of a Cr2O7 cluster on the surface can be increased by surface alloying, influencing the tip manipulation. Our study demonstrates that the oxide-metal interfacial interaction can be probed by STM tip manipulation of supported oxide clusters, which provides a new method to investigate the interfacial interaction.
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Affiliation(s)
- Zhiyu Yi
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Le Lin
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xuda Luo
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanxiao Ning
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Qiang Fu
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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