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He ZD, Tesch R, Eslamibidgoli MJ, Eikerling MH, Kowalski PM. Low-spin state of Fe in Fe-doped NiOOH electrocatalysts. Nat Commun 2023; 14:3498. [PMID: 37311755 DOI: 10.1038/s41467-023-38978-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 05/23/2023] [Indexed: 06/15/2023] Open
Abstract
Doping with Fe boosts the electrocatalytic performance of NiOOH for the oxygen evolution reaction (OER). To understand this effect, we have employed state-of-the-art electronic structure calculations and thermodynamic modeling. Our study reveals that at low concentrations Fe exists in a low-spin state. Only this spin state explains the large solubility limit of Fe and similarity of Fe-O and Ni-O bond lengths measured in the Fe-doped NiOOH phase. The low-spin state renders the surface Fe sites highly active for the OER. The low-to-high spin transition at the Fe concentration of ~ 25% is consistent with the experimentally determined solubility limit of Fe in NiOOH. The thermodynamic overpotentials computed for doped and pure materials, η = 0.42 V and 0.77 V, agree well with the measured values. Our results indicate a key role of the low-spin state of Fe for the OER activity of Fe-doped NiOOH electrocatalysts.
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Affiliation(s)
- Zheng-Da He
- Institute of Energy and Climate Research (IEK-13), Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425, Jülich, Germany
- JARA Energy & Center for Simulation and Data Science (CSD), 52425, Jülich, Germany
| | - Rebekka Tesch
- Institute of Energy and Climate Research (IEK-13), Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425, Jülich, Germany
- JARA Energy & Center for Simulation and Data Science (CSD), 52425, Jülich, Germany
- Chair of Theory and Computation of Energy Materials, Faculty of Georesources and Materials Engineering, RWTH Aachen University, 52062, Aachen, Germany
| | - Mohammad J Eslamibidgoli
- Institute of Energy and Climate Research (IEK-13), Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425, Jülich, Germany
- JARA Energy & Center for Simulation and Data Science (CSD), 52425, Jülich, Germany
| | - Michael H Eikerling
- Institute of Energy and Climate Research (IEK-13), Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425, Jülich, Germany
- JARA Energy & Center for Simulation and Data Science (CSD), 52425, Jülich, Germany
- Chair of Theory and Computation of Energy Materials, Faculty of Georesources and Materials Engineering, RWTH Aachen University, 52062, Aachen, Germany
| | - Piotr M Kowalski
- Institute of Energy and Climate Research (IEK-13), Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425, Jülich, Germany.
- JARA Energy & Center for Simulation and Data Science (CSD), 52425, Jülich, Germany.
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Sundararaman R, Vigil-Fowler D, Schwarz K. Improving the Accuracy of Atomistic Simulations of the Electrochemical Interface. Chem Rev 2022; 122:10651-10674. [PMID: 35522135 PMCID: PMC10127457 DOI: 10.1021/acs.chemrev.1c00800] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Atomistic simulation of the electrochemical double layer is an ambitious undertaking, requiring quantum mechanical description of electrons, phase space sampling of liquid electrolytes, and equilibration of electrolytes over nanosecond time scales. All models of electrochemistry make different trade-offs in the approximation of electrons and atomic configurations, from the extremes of classical molecular dynamics of a complete interface with point-charge atoms to correlated electronic structure methods of a single electrode configuration with no dynamics or electrolyte. Here, we review the spectrum of simulation techniques suitable for electrochemistry, focusing on the key approximations and accuracy considerations for each technique. We discuss promising approaches, such as enhanced sampling techniques for atomic configurations and computationally efficient beyond density functional theory (DFT) electronic methods, that will push electrochemical simulations beyond the present frontier.
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Affiliation(s)
- Ravishankar Sundararaman
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180, United States
| | - Derek Vigil-Fowler
- Materials, Chemical, and Computational Science Directorate, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Kathleen Schwarz
- Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
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Xie Y, Artymowicz DM, Lopes PP, Aiello A, Wang D, Hart JL, Anber E, Taheri ML, Zhuang H, Newman RC, Sieradzki K. A percolation theory for designing corrosion-resistant alloys. NATURE MATERIALS 2021; 20:789-793. [PMID: 33526878 DOI: 10.1038/s41563-021-00920-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 12/24/2020] [Indexed: 06/12/2023]
Abstract
Iron-chromium and nickel-chromium binary alloys containing sufficient quantities of chromium serve as the prototypical corrosion-resistant metals owing to the presence of a nanometre-thick protective passive oxide film1-8. Should this film be compromised by a scratch or abrasive wear, it reforms with little accompanying metal dissolution, a key criterion for good passive behaviour. This is a principal reason that stainless steels and other chromium-containing alloys are used in critical applications ranging from biomedical implants to nuclear reactor components9,10. Unravelling the compositional dependence of this electrochemical behaviour is a long-standing unanswered question in corrosion science. Herein, we develop a percolation theory of alloy passivation based on two-dimensional to three-dimensional crossover effects that accounts for selective dissolution and the quantity of metal dissolved during the initial stage of passive film formation. We validate this theory both experimentally and by kinetic Monte Carlo simulation. Our results reveal a path forward for the design of corrosion-resistant metallic alloys.
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Affiliation(s)
- Yusi Xie
- Ira A. Fulton School of Engineering, Arizona State University, Tempe, AZ, USA
| | - Dorota M Artymowicz
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada
| | - Pietro P Lopes
- Materials Science Division, Argonne National Laboratory, Lemont, IL, USA
| | - Ashlee Aiello
- Ira A. Fulton School of Engineering, Arizona State University, Tempe, AZ, USA
| | - Duo Wang
- Ira A. Fulton School of Engineering, Arizona State University, Tempe, AZ, USA
| | - James L Hart
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Elaf Anber
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, USA
| | - Mitra L Taheri
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Houlong Zhuang
- Ira A. Fulton School of Engineering, Arizona State University, Tempe, AZ, USA
| | - Roger C Newman
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada
| | - Karl Sieradzki
- Ira A. Fulton School of Engineering, Arizona State University, Tempe, AZ, USA.
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Puppe J, Opdam M, Schouten PC, Jóźwiak K, Lips E, Severson T, van de Ven M, Brambillasca C, Bouwman P, van Tellingen O, Bernards R, Wesseling J, Eichler C, Thangarajah F, Malter W, Pandey GK, Ozretić L, Caldas C, van Lohuizen M, Hauptmann M, Rhiem K, Hahnen E, Reinhardt HC, Büttner R, Mallmann P, Schömig-Markiefka B, Schmutzler R, Linn S, Jonkers J. EZH2 Is Overexpressed in BRCA1-like Breast Tumors and Predictive for Sensitivity to High-Dose Platinum-Based Chemotherapy. Clin Cancer Res 2019; 25:4351-4362. [PMID: 31036541 DOI: 10.1158/1078-0432.ccr-18-4024] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/25/2019] [Accepted: 04/24/2019] [Indexed: 11/16/2022]
Abstract
PURPOSE BRCA1-deficient breast cancers carry a specific DNA copy-number signature ("BRCA1-like") and are hypersensitive to DNA double-strand break (DSB) inducing compounds. Here, we explored whether (i) EZH2 is overexpressed in human BRCA1-deficient breast tumors and might predict sensitivity to DSB-inducing drugs; (ii) EZH2 inhibition potentiates cisplatin efficacy in Brca1-deficient murine mammary tumors. EXPERIMENTAL DESIGN EZH2 expression was analyzed in 497 breast cancers using IHC or RNA sequencing. We classified 370 tumors by copy-number profiles as BRCA1-like or non-BRCA1-like and examined its association with EZH2 expression. Additionally, we assessed BRCA1 loss through mutation or promoter methylation status and investigated the predictive value of EZH2 expression in a study population of breast cancer patients treated with adjuvant high-dose platinum-based chemotherapy compared with standard anthracycline-based chemotherapy. To explore whether EZH2 inhibition by GSK126 enhances sensitivity to platinum drugs in EZH2-overexpressing breast cancers we used a Brca1-deficient mouse model. RESULTS The highest EZH2 expression was found in BRCA1-associated tumors harboring a BRCA1 mutation, BRCA1-promoter methylation or were classified as BRCA1 like. We observed a greater benefit from high-dose platinum-based chemotherapy in BRCA1-like and non-BRCA1-like patients with high EZH2 expression. Combined treatment with the EZH2 inhibitor GSK126 and cisplatin decreased cell proliferation and improved survival in Brca1-deficient mice in comparison with single agents. CONCLUSIONS Our findings demonstrate that EZH2 is expressed at significantly higher levels in BRCA1-deficient breast cancers. EZH2 overexpression can identify patients with breast cancer who benefit significantly from intensified DSB-inducing platinum-based chemotherapy independent of BRCA1-like status. EZH2 inhibition improves the antitumor effect of platinum drugs in Brca1-deficient breast tumors in vivo.
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Affiliation(s)
- Julian Puppe
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands.
- Department of Obstetrics and Gynecology, Medical Faculty, University Hospital Cologne, Cologne, Germany
- Center of Familial Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | - Mark Opdam
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Philip C Schouten
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Katarzyna Jóźwiak
- Department of Epidemiology and Biostatistics, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Esther Lips
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Tesa Severson
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Marieke van de Ven
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
- Oncode Institute, Utrecht, the Netherlands
| | - Chiara Brambillasca
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
- Oncode Institute, Utrecht, the Netherlands
| | - Peter Bouwman
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
- Oncode Institute, Utrecht, the Netherlands
| | - Olaf van Tellingen
- Division of Pharmacology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - René Bernards
- Oncode Institute, Utrecht, the Netherlands
- Division of Molecular Carcinogenesis, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Jelle Wesseling
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Christian Eichler
- Department of Obstetrics and Gynecology, Medical Faculty, University Hospital Cologne, Cologne, Germany
| | - Fabinshy Thangarajah
- Department of Obstetrics and Gynecology, Medical Faculty, University Hospital Cologne, Cologne, Germany
| | - Wolfram Malter
- Department of Obstetrics and Gynecology, Medical Faculty, University Hospital Cologne, Cologne, Germany
| | - Gaurav Kumar Pandey
- Oncode Institute, Utrecht, the Netherlands
- Division of Molecular Genetics, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Luka Ozretić
- Department of Pathology, University Hospital of Cologne, Cologne, Germany
| | | | - Maarten van Lohuizen
- Oncode Institute, Utrecht, the Netherlands
- Division of Molecular Genetics, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Michael Hauptmann
- Department of Epidemiology and Biostatistics, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Kerstin Rhiem
- Center of Familial Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | - Eric Hahnen
- Center of Familial Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | | | - Reinhard Büttner
- Department of Pathology, University Hospital of Cologne, Cologne, Germany
| | - Peter Mallmann
- Department of Obstetrics and Gynecology, Medical Faculty, University Hospital Cologne, Cologne, Germany
| | | | - Rita Schmutzler
- Center of Familial Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | - Sabine Linn
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Jos Jonkers
- Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
- Center of Familial Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
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