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Janssen A, Lyu Z, Figueras-Valls M, Chao HY, Shi Y, Pawlik V, Chi M, Mavrikakis M, Xia Y. Phase-Controlled Synthesis of Ru Nanocrystals via Template-Directed Growth: Surface Energy versus Bulk Energy. Nano Lett 2022; 22:3591-3597. [PMID: 35439017 DOI: 10.1021/acs.nanolett.1c05009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Despite the successful control of crystal phase using template-directed growth, much remains unknown about the underlying mechanisms. Here, we demonstrate that the crystal phase taken by the deposited metal depends on the lateral size of face-centered cubic (fcc)-Pd nanoplate templates with 12 nm plates giving fcc-Ru while 18-26 nm plates result in hexagonal closed-packed (hcp)-Ru. Although Ru overlayers with a metastable fcc- (high in bulk energy) or stable hcp-phase (low in bulk energy) can be epitaxially deposited on the basal planes, the lattice mismatch will lead to jagged hcp- (high in surface energy) and smooth fcc-facets (low in surface energy), respectively, on the side faces. As the proportion of basal and side faces on the nanoplates varies with lateral size, the crystal phase will change depending on the relative contributions from the surface and bulk energies. The Pd@fcc-Ru outperforms the Pd@hcp-Ru nanoplates toward ethylene glycol and glycerol oxidation reactions.
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Affiliation(s)
- Annemieke Janssen
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Zhiheng Lyu
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Marc Figueras-Valls
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Hsin-Yun Chao
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Yifeng Shi
- School of Chemical and Biochemical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Veronica Pawlik
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Younan Xia
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
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Li Y, Song L, Wang C, Lei P, Deng Z. Decoupled Roles of DNA-Surfactant Interactions: Instant Charge Inversion, Enhanced Colloidal and Chemical Stabilities, and Fully Tunable DNA Conjugation of Shaped Plasmonic Nanocrystals. Nano Lett 2022; 22:3385-3391. [PMID: 35436130 DOI: 10.1021/acs.nanolett.2c00656] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Surfactant-dictated syntheses of nanomaterials with well-defined shapes offer an extra dimension of control beyond nanoparticle size and chemical composition on the properties and self-assembly behaviors of colloidal materials. However, the surfactant bilayers on nanocrystals often cause great difficulty toward DNA grafting due to their unfavorable electrostatic charges and dense surface packing. Herein a revisit to this dilemma unveils a rapid charge inversion and enhanced colloidal/chemical stabilities of cationic-bilayer-covered nanocrystals upon DNA adsorption. Decoupling this hidden scenario provides a rationale to significantly improve DNA functionalization of surfactant-capped nanocrystals. Accordingly, fully tunable DNA conjugation (via Au-S bonding) on up to seven classes of surfactant-coated metal nanounits is easily and consistently achievable. The DNA-nanocrystal complexes featuring a continuously variable DNA density function well in DNA-guided nanoassembly. Our method opens the door to a wealth of material building blocks derived by surfactant-directed nanosyntheses toward DNA-programmable, extremely diversified, and highly complicated structures and functions.
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Affiliation(s)
- Yanjuan Li
- Center for Bioanalytical Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Lei Song
- Center for Bioanalytical Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Chengjun Wang
- Center for Bioanalytical Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Pengcheng Lei
- Center for Bioanalytical Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Zhaoxiang Deng
- Center for Bioanalytical Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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Ogiwara N, Kobayashi H, Inukai M, Nishiyama Y, Concepción P, Rey F, Kitagawa H. Ligand-Functionalization-Controlled Activity of Metal-Organic Framework-Encapsulated Pt Nanocatalyst toward Activation of Water. Nano Lett 2020; 20:426-432. [PMID: 31833371 DOI: 10.1021/acs.nanolett.9b04124] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We first report the systematic control of the reactivity of H2O vapor in metal-organic frameworks (MOFs) with Pt nanocrystals (NCs) through ligand functionalization. We successfully synthesized Pt NCs covered with a water-stable MOF, UiO-66 (Pt@UiO-66), having different metal ions or functionalized ligands. The ligand functionalization of UiO-66 significantly affected the catalytic performance of the water-gas shift reaction, and the replacement of Zr4+ ions with Hf4+ ions in UiO-66 had no impact on the catalytic activity. The introduction of a -Br group lowered the reactivity of Pt@UiO-66 by nearly half, whereas the substitution of -Br with a -Me2 group triply enhanced the activity. The origin of the enhanced catalytic activity was found to be the change in H2O activity in the UiO-66 pores by the ligand functionalization, which was investigated using H2O sorption, solid-state NMR, X-ray photoelectron spectroscopy, and in situ IR measurements. This work opens a new prospect to develop MOFs as a platform to activate H2O.
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Affiliation(s)
- Naoki Ogiwara
- Division of Chemistry, Graduate School of Science , Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502 , Japan
| | - Hirokazu Kobayashi
- Division of Chemistry, Graduate School of Science , Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502 , Japan
- PRESTO, Japan Science and Technology Agency , 4-1-8 Honcho , Kawaguchi , Saitama 332-0012 , Japan
| | - Munehiro Inukai
- Graduate School of Science and Technology , Tokushima University , 2-1 minami-Josanjima-Cho , Tokushima 770-8506 , Japan
| | - Yusuke Nishiyama
- JEOL Resonance Inc. , 3-1-2 Musashino , Akishima , Tokyo 196-8558 , Japan
- RIKEN CLST-JEOL Collaboration Center , Yokohama , Kanagawa 230-0045 , Japan
| | - Patricia Concepción
- Instituto Universitario de Tecnología Química CSIC-UPV, Universitat Politècnica de València , Av. de los Naranjos s/n , 46022 Valencia , Spain
| | - Fernando Rey
- Instituto Universitario de Tecnología Química CSIC-UPV, Universitat Politècnica de València , Av. de los Naranjos s/n , 46022 Valencia , Spain
| | - Hiroshi Kitagawa
- Division of Chemistry, Graduate School of Science , Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502 , Japan
- Institute for Integrated Cell-Material Sciences, Institute for Advanced Study , Kyoto University , Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501 , Japan
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Rungtaweevoranit B, Baek J, Araujo JR, Archanjo BS, Choi KM, Yaghi OM, Somorjai GA. Copper Nanocrystals Encapsulated in Zr-based Metal-Organic Frameworks for Highly Selective CO 2 Hydrogenation to Methanol. Nano Lett 2016; 16:7645-7649. [PMID: 27960445 DOI: 10.1021/acs.nanolett.6b03637] [Citation(s) in RCA: 207] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We show that the activity and selectivity of Cu catalyst can be promoted by a Zr-based metal-organic framework (MOF), Zr6O4(OH)4(BDC)6 (BDC = 1,4-benzenedicarboxylate), UiO-66, to have a strong interaction with Zr oxide [Zr6O4(OH)4(-CO2)12] secondary building units (SBUs) of the MOF for CO2 hydrogenation to methanol. These interesting features are achieved by a catalyst composed of 18 nm single Cu nanocrystal (NC) encapsulated within single crystal UiO-66 (Cu⊂UiO-66). The performance of this catalyst construct exceeds the benchmark Cu/ZnO/Al2O3 catalyst and gives a steady 8-fold enhanced yield and 100% selectivity for methanol. The X-ray photoelectron spectroscopy data obtained on the surface of the catalyst show that Zr 3d binding energy is shifted toward lower oxidation state in the presence of Cu NC, suggesting that there is a strong interaction between Cu NC and Zr oxide SBUs of the MOF to make a highly active Cu catalyst.
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Affiliation(s)
- Bunyarat Rungtaweevoranit
- Department of Chemistry, University of California-Berkeley, Kavli Energy NanoSciences Institute , Berkeley, California 94720, United States
| | - Jayeon Baek
- Department of Chemistry, University of California-Berkeley, Kavli Energy NanoSciences Institute , Berkeley, California 94720, United States
| | - Joyce R Araujo
- Department of Chemistry, University of California-Berkeley, Kavli Energy NanoSciences Institute , Berkeley, California 94720, United States
- Materials Metrology Division, National Institute of Metrology, Quality, and Technology , Duque de Caxias, Rio de Janeiro 25250-020, Brazil
| | - Braulio S Archanjo
- Materials Metrology Division, National Institute of Metrology, Quality, and Technology , Duque de Caxias, Rio de Janeiro 25250-020, Brazil
| | - Kyung Min Choi
- Department of Chemistry, University of California-Berkeley, Kavli Energy NanoSciences Institute , Berkeley, California 94720, United States
| | - Omar M Yaghi
- Department of Chemistry, University of California-Berkeley, Kavli Energy NanoSciences Institute , Berkeley, California 94720, United States
- King Abdulaziz City for Science and Technology , Riyadh 11442, Saudi Arabia
| | - Gabor A Somorjai
- Department of Chemistry, University of California-Berkeley, Kavli Energy NanoSciences Institute , Berkeley, California 94720, United States
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Na K, Choi KM, Yaghi OM, Somorjai GA. Metal nanocrystals embedded in single nanocrystals of MOFs give unusual selectivity as heterogeneous catalysts. Nano Lett 2014; 14:5979-83. [PMID: 25198135 DOI: 10.1021/nl503007h] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The growth of nanocrystalline metal-organic frameworks (nMOFs) around metal nanocrystals (NCs) is useful in controlling the chemistry and metric of metal NCs. In this Letter, we show rare examples of nMOFs grown in monocrystalline form around metal NCs. Specifically, Pt NCs were subjected to reactions yielding Zr(IV) nMOFs [Zr6O4(OH)4(fumarate)6, MOF-801; Zr6O4(OH)4(BDC)6 (BDC = 1,4-benzenedicarboxylate), UiO-66; Zr6O4(OH)4(BPDC)6 (BPDC = 4,4'-biphenyldicarboxylate), UiO-67] as a single crystal within which the Pt NCs are embedded. These constructs (Pt⊂nMOF)nanocrystal are found to be active in gas-phase hydrogenative conversion of methylcyclopentane (MCP) and give unusual product selectivity. The Pt⊂nUiO-66 shows selectivity to C6-cyclic hydrocarbons such as cyclohexane and benzene that takes place with 100 °C lower temperature than the standard reaction (Pt-on-SiO2). We observe a pore size effect in the nMOF series where the small pore of Pt⊂nMOF-801 does not produce the same products, while the larger pore Pt⊂nUiO-67 catalyst provides the same products but with different selectivity. The (Pt⊂nMOF)nanocrystal spent catalyst is found to maintain the original crystallinity, and be recyclable without any byproduct residues.
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Affiliation(s)
- Kyungsu Na
- † Department of Chemistry, University of California-Berkeley , Berkeley, California 94720, United States
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