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Wang J, Chen X, Li C, Zhu Y, Li J, Shan S, Wu Y, Hunt A, Waluyo I, Boscoboinik JA, Tong X, Zhong CJ, Zhou G. Enhancing Stability of Surface Au under Oxidizing Conditions through Reduced Bulk Au Content. J Phys Chem Lett 2024; 15:10583-10591. [PMID: 39404467 DOI: 10.1021/acs.jpclett.4c02172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2024]
Abstract
Contrary to the common assumption that a higher bulk content of precious metals facilitates the preservation of more surface noble metal by serving as a reservoir for surface enrichment, we demonstrate that a lower bulk content of Au results in a more stable arrangement of Au atoms at the surface of Cu-Au nanoparticles when exposed to an O2 atmosphere. Using ambient pressure X-ray photoelectron spectroscopy, we investigate the surface segregation and oxidation behavior of Cu-Au nanoparticles across various compositions. Our results reveal that in Au-rich nanoparticles exposed to an H2 atmosphere, surface segregation prompts the formation of a continuous Au-enriched shell, which subsequently oxidizes into a complete CuOx shell upon transitioning to an O2 atmosphere. Conversely, in Au-poor nanoparticles during H2 treatment, segregation results in the emergence of Au clusters embedded within the surface layer, persisting upon exposure to O2. This unexpected phenomenon shows that reducing the bulk content of precious metals can enhance the surface stability of noble atoms under oxidizing conditions, as further demonstrated by comparing the catalytic performance of Cu-Au nanoparticles with varying Au bulk contents in CO oxidation.
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Affiliation(s)
- Jianyu Wang
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, New York 13902, United States
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Xiaobo Chen
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, New York 13902, United States
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Chaoran Li
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, New York 13902, United States
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Yaguang Zhu
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, New York 13902, United States
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Jing Li
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Shiyao Shan
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Yupeng Wu
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, New York 13902, United States
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Adrian Hunt
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Iradwikanari Waluyo
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - J Anibal Boscoboinik
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Xiao Tong
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Chuan-Jian Zhong
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Guangwen Zhou
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, New York 13902, United States
- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States
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Zhu Y, Wang J, Patel SB, Li C, Head AR, Boscoboinik JA, Zhou G. Tuning the surface reactivity of oxides by peroxide species. Proc Natl Acad Sci U S A 2023; 120:e2215189120. [PMID: 36943886 PMCID: PMC10068848 DOI: 10.1073/pnas.2215189120] [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: 09/05/2022] [Accepted: 01/21/2023] [Indexed: 03/23/2023] Open
Abstract
The Mars-van Krevelen mechanism is the foundation for oxide-catalyzed oxidation reactions and relies on spatiotemporally separated redox steps. Herein, we demonstrate the tunability of this separation with peroxide species formed by excessively adsorbed oxygen, thereby modifying the catalytic activity and selectivity of the oxide. Using CuO as an example, we show that a surface layer of peroxide species acts as a promotor to significantly enhance CuO reducibility in favor of H2 oxidation but conversely as an inhibitor to suppress CuO reduction against CO oxidation. Together with atomistic modeling, we identify that this opposite effect of the peroxide on the two oxidation reactions stems from its modification on coordinately unsaturated sites of the oxide surface. By differentiating the chemical functionality between lattice oxygen and peroxide, these results are closely relevant to a wide range of catalytic oxidation reactions using excessively adsorbed oxygen to activate lattice oxygen and tune the activity and selectivity of redox sites.
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Affiliation(s)
- Yaguang Zhu
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY13902
| | - Jianyu Wang
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY13902
| | - Shyam Bharatkumar Patel
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY13902
| | - Chaoran Li
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY13902
| | - Ashley R. Head
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY11973
| | | | - Guangwen Zhou
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY13902
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Kim J, Choi H, Kim D, Park JY. Operando Surface Studies on Metal-Oxide Interfaces of Bimetal and Mixed Catalysts. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02340] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Jeongjin Kim
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Hanseul Choi
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Daeho Kim
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Jeong Young Park
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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Zeng S, Shan S, Lu A, Wang S, Caracciolo DT, Robinson RJ, Shang G, Xue L, Zhao Y, Zhang A, Liu Y, Liu S, Liu Z, Bai F, Wu J, Wang H, Zhong CJ. Copper-alloy catalysts: structural characterization and catalytic synergies. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00179e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Recent progress in the development of copper-alloy catalysts is highlighted, focusing on the structural and mechanistic characterizations of the catalysts in different catalytic reactions, and challenges and opportunities in future research.
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Affiliation(s)
- Shanghong Zeng
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.R. China
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| | - Shiyao Shan
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| | - Aolin Lu
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| | - Shan Wang
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| | - Dominic T. Caracciolo
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| | - Richard J. Robinson
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| | - Guojun Shang
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| | - Lei Xue
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.R. China
| | - Yuansong Zhao
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.R. China
| | - Aiai Zhang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.R. China
| | - Yang Liu
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.R. China
| | - Shangpeng Liu
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.R. China
| | - Ze Liu
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.R. China
| | - Fenghua Bai
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.R. China
| | - Jinfang Wu
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.R. China
| | - Hong Wang
- School of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia, 010051, P.R. China
| | - Chuan-Jian Zhong
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
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Zou L, Cao P, Lei Y, Zakharov D, Sun X, House SD, Luo L, Li J, Yang Y, Yin Q, Chen X, Li C, Qin H, Stach EA, Yang JC, Wang G, Zhou G. Atomic-scale phase separation induced clustering of solute atoms. Nat Commun 2020; 11:3934. [PMID: 32769992 PMCID: PMC7415157 DOI: 10.1038/s41467-020-17826-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 06/30/2020] [Indexed: 11/21/2022] Open
Abstract
Dealloying typically occurs via the chemical dissolution of an alloy component through a corrosion process. In contrast, here we report an atomic-scale nonchemical dealloying process that results in the clustering of solute atoms. We show that the disparity in the adatom-substrate exchange barriers separate Cu adatoms from a Cu-Au mixture, leaving behind a fluid phase enriched with Au adatoms that subsequently aggregate into supported clusters. Using dynamic, atomic-scale electron microscopy observations and theoretical modeling, we delineate the atomic-scale mechanisms associated with the nucleation, rotation and amorphization-crystallization oscillations of the Au clusters. We expect broader applicability of the results because the phase separation process is dictated by the inherent asymmetric adatom-substrate exchange barriers for separating dissimilar atoms in multicomponent materials.
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Affiliation(s)
- Lianfeng Zou
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY, 13902, USA
| | - Penghui Cao
- Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA, 92697, USA
| | - Yinkai Lei
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Dmitri Zakharov
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Xianhu Sun
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY, 13902, USA
| | - Stephen D House
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA
- Environmental TEM Catalysis Consortium (ECC), University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Langli Luo
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY, 13902, USA
| | - Jonathan Li
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY, 13902, USA
| | - Yang Yang
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Qiyue Yin
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY, 13902, USA
| | - Xiaobo Chen
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY, 13902, USA
| | - Chaoran Li
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY, 13902, USA
| | - Hailang Qin
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY, 13902, USA
| | - Eric A Stach
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Judith C Yang
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA
- Environmental TEM Catalysis Consortium (ECC), University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Guofeng Wang
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Guangwen Zhou
- Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York, Binghamton, NY, 13902, USA.
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