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Zou Z, Sala A, Panighel M, Tosi E, Lacovig P, Lizzit S, Scardamaglia M, Kokkonen E, Cepek C, Africh C, Comelli G, Günther S, Patera LL. In Situ Observation of C-C Coupling and Step Poisoning During the Growth of Hydrocarbon Chains on Ni(111). Angew Chem Int Ed Engl 2023; 62:e202213295. [PMID: 36325959 PMCID: PMC10108169 DOI: 10.1002/anie.202213295] [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: 09/08/2022] [Indexed: 11/06/2022]
Abstract
The synthesis of high-value fuels and plastics starting from small hydrocarbon molecules plays a central role in the current transition towards renewable energy. However, the detailed mechanisms driving the growth of hydrocarbon chains remain to a large extent unknown. Here we investigated the formation of hydrocarbon chains resulting from acetylene polymerization on a Ni(111) model catalyst surface. Exploiting X-ray photoelectron spectroscopy up to near-ambient pressures, the intermediate species and reaction products have been identified. Complementary in situ scanning tunneling microscopy observations shed light onto the C-C coupling mechanism. While the step edges of the metal catalyst are commonly assumed to be the active sites for the C-C coupling, we showed that the polymerization occurs instead on the flat terraces of the metallic surface.
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Affiliation(s)
- Zhiyu Zou
- CNR-IOM Materials Foundry Institute34149TriesteItaly
| | - Alessandro Sala
- CNR-IOM Materials Foundry Institute34149TriesteItaly
- Department of PhysicsUniversity of Trieste34127TriesteItaly
| | | | | | | | | | | | | | - Cinzia Cepek
- CNR-IOM Materials Foundry Institute34149TriesteItaly
| | | | - Giovanni Comelli
- CNR-IOM Materials Foundry Institute34149TriesteItaly
- Department of PhysicsUniversity of Trieste34127TriesteItaly
| | - Sebastian Günther
- Department of Chemistry and Catalysis Research CenterTechnical University of Munich85748GarchingGermany
| | - Laerte L. Patera
- Department of Chemistry and Catalysis Research CenterTechnical University of Munich85748GarchingGermany
- Institute of Physical ChemistryUniversity of Innsbruck6020InnsbruckAustria
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2
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Freiberger EM, Düll F, Wichmann C, Bauer U, Steinrück HP, Papp C. A high-resolution X-ray photoelectron spectroscopy study on the adsorption and reaction of ethylene on Rh(1 1 1). Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Düll F, Steinhauer J, Späth F, Bauer U, Bachmann P, Steinrück HP, Wickert S, Denecke R, Papp C. Ethylene: Its adsorption, reaction, and coking on Pt/h-BN/Rh(111) nanocluster arrays. J Chem Phys 2020; 152:224710. [PMID: 32534549 DOI: 10.1063/5.0011616] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
We present well-ordered Pt nanocluster arrays supported on the h-BN/Rh(111) Moiré as a model system for an ethylene dehydrogenation catalyst. Thereby, the h-BN nanomesh serves as a chemically inert eggbox-like template for clusters with a narrow size distribution. The thermal evolution of ethylene is investigated by synchrotron-based high-resolution in situ x-ray photoelectron spectroscopy on the Pt nanoclusters. We compare our results with data on Pt(111) and Pt(355). Interestingly, the Pt nanoclusters and Pt(355) behave very similarly. Both open a new reaction pathway via vinylidene in addition to the route via ethylidyne known for Pt(111). Due to the importance of coking in ethylene dehydrogenation on Pt catalysts, we also studied C2H4 adsorption and decomposition on carbon precovered Pt nanoclusters. While the amount of adsorbed ethylene decreases linearly with the carbon coverage, we found that edge sites are more affected than facet sites and that the vinylidene reaction pathway is effectively suppressed by carbon residues.
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Affiliation(s)
- Fabian Düll
- Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Johann Steinhauer
- Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Florian Späth
- Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Udo Bauer
- Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Philipp Bachmann
- Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Hans-Peter Steinrück
- Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Sandra Wickert
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstraße 2, Leipzig, D-04103, Germany
| | - Reinhard Denecke
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstraße 2, Leipzig, D-04103, Germany
| | - Christian Papp
- Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
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Zhang M, Huang H, Yu Y. Insight into the Mechanism of Ethylene Decomposition Over Co(0001) Surface: Formation of Carbon Species. Catal Letters 2019. [DOI: 10.1007/s10562-019-02676-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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5
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Papp C. From Flat Surfaces to Nanoparticles: In Situ Studies of the Reactivity of Model Catalysts. Catal Letters 2016. [DOI: 10.1007/s10562-016-1925-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Roiaz M, Monachino E, Dri C, Greiner M, Knop-Gericke A, Schlögl R, Comelli G, Vesselli E. Reverse Water–Gas Shift or Sabatier Methanation on Ni(110)? Stable Surface Species at Near-Ambient Pressure. J Am Chem Soc 2016; 138:4146-54. [DOI: 10.1021/jacs.5b13366] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Matteo Roiaz
- Physics Department, University of Trieste, via Valerio 2, I-34127 Trieste, Italy
| | - Enrico Monachino
- Physics Department, University of Trieste, via Valerio 2, I-34127 Trieste, Italy
| | - Carlo Dri
- Physics Department, University of Trieste, via Valerio 2, I-34127 Trieste, Italy
- IOM-CNR Laboratorio TASC, Area Science Park, S.S. 14 km 163.5, I-34149 Basovizza (Trieste), Italy
| | - Mark Greiner
- Abteilung Anorganische Chemie, Fritz-Haber Institut der Max-Planck Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Axel Knop-Gericke
- Abteilung Anorganische Chemie, Fritz-Haber Institut der Max-Planck Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Robert Schlögl
- Abteilung Anorganische Chemie, Fritz-Haber Institut der Max-Planck Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Giovanni Comelli
- Physics Department, University of Trieste, via Valerio 2, I-34127 Trieste, Italy
- IOM-CNR Laboratorio TASC, Area Science Park, S.S. 14 km 163.5, I-34149 Basovizza (Trieste), Italy
| | - Erik Vesselli
- Physics Department, University of Trieste, via Valerio 2, I-34127 Trieste, Italy
- IOM-CNR Laboratorio TASC, Area Science Park, S.S. 14 km 163.5, I-34149 Basovizza (Trieste), Italy
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7
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Wang H, Tao T, Yan W, Feng Y, Wang Y, Cai J, You Y, Jiang T, Jiang C. Upregulation of miR-181s reverses mesenchymal transition by targeting KPNA4 in glioblastoma. Sci Rep 2015; 5:13072. [PMID: 26283154 PMCID: PMC4539550 DOI: 10.1038/srep13072] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 07/16/2015] [Indexed: 12/18/2022] Open
Abstract
The goal of this work was to explore the most effective miRNAs affecting glioblastoma multiforme (GBM) phenotype transition and malignant progression. We annotated 491 TCGA samples’ miRNA expression profiles according to their mRNA-based subtypes and found that the mesenchymal tumors had significantly decreased miR-181 family expression compared with the other three subtypes while the proneural subtype harbored extremely high miR-181 family expression. Patients with high miR-181 family expression had longer overall survival (p = 0.0031). We also confirmed that NF-κB-targeting genes and the EMT (epithelial-mesenchymal transition) pathway were inversely correlated with miR-181 family expression and that the entire miR-181 family inhibited glioma cell invasion and proliferation; of these, miR-181b was the most effective suppressor. Furthermore, miR-181b was validated to suppress EMT by targeting KPNA4 and was associated with survival outcome in the TCGA and CGGA datasets and in another independent cohort. The EMT-inhibitory effect of miR-181b was lost after KPNA4 expression was restored. We also identified the antitumorigenic activity of miR-181b in vitro and in vivo. Our results showed that miR-181 family expression was closely correlated with TCGA subtypes and patients’ overall survival, indicating that miR-181b, a tumor-suppressive miRNA, could be a novel therapeutic candidate for treating gliomas.
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Affiliation(s)
- Hongjun Wang
- 1] Department of Neurosurgery, the Second Affiliated Hospital of Harbin Medical University, Harbin, China [2] Chinese Glioma Cooperative Group (CGCG)
| | - Tao Tao
- Department of Urology, Affiliated Zhongda Hospital, Southeast University, Nanjing, China; Surgical Research Center, Medical School, Southeast University, Nanjing, China
| | - Wei Yan
- 1] Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China [2] Chinese Glioma Cooperative Group (CGCG)
| | - Yan Feng
- 1] Department of Neurosurgery, the Second Affiliated Hospital of Harbin Medical University, Harbin, China [2] Chinese Glioma Cooperative Group (CGCG)
| | - Yongzhi Wang
- 1] Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China [2] Beijing Neurosurgical Institute, Beijing, China [3] Chinese Glioma Cooperative Group (CGCG)
| | - Jinquan Cai
- 1] Department of Neurosurgery, the Second Affiliated Hospital of Harbin Medical University, Harbin, China [2] Chinese Glioma Cooperative Group (CGCG)
| | - Yongping You
- 1] Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China [2] Chinese Glioma Cooperative Group (CGCG)
| | - Tao Jiang
- 1] Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China [2] Beijing Neurosurgical Institute, Beijing, China [3] Chinese Glioma Cooperative Group (CGCG)
| | - Chuanlu Jiang
- 1] Department of Neurosurgery, the Second Affiliated Hospital of Harbin Medical University, Harbin, China [2] Chinese Glioma Cooperative Group (CGCG)
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8
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Weststrate C, Ciobîcă I, Saib A, Moodley D, Niemantsverdriet J. Fundamental issues on practical Fischer–Tropsch catalysts: How surface science can help. Catal Today 2014. [DOI: 10.1016/j.cattod.2013.11.042] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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9
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Lee AF, Naughton JN, Liu Z, Wilson K. High-Pressure XPS of Crotyl Alcohol Selective Oxidation over Metallic and Oxidized Pd(111). ACS Catal 2012. [DOI: 10.1021/cs300450y] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Adam F. Lee
- Cardiff Catalysis Institute,
School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K
| | - James N. Naughton
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Zhi Liu
- Advanced Light Source, Lawrence Berkeley Laboratory, 1 Cyclotron Road, Berkeley,
California 94720, United States
| | - Karen Wilson
- Cardiff Catalysis Institute,
School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K
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