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Askins EJ, Sarkar A, Navabi P, Kumar K, Finkelmeyer SJ, Presselt M, Cabana J, Glusac KD. Interfacial Electrochemistry of Catalyst-Coordinated Graphene Nanoribbons. J Am Chem Soc 2024; 146:22360-22373. [PMID: 39087647 DOI: 10.1021/jacs.4c05250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
The immobilization of molecular electrocatalysts on conductive electrodes is an appealing strategy for enhancing their overall activity relative to those of analogous molecular compounds. In this study, we report on the interfacial electrochemistry of self-assembled two-dimensional nanosheets of graphene nanoribbons (GNR-2DNS) and analogs containing a Rh-based hydrogen evolution reaction (HER) catalyst (RhGNR-2DNS) immobilized on conductive electrodes. Proton-coupled electron transfer (PCET) taking place at N-centers of the nanoribbons was utilized as an indirect reporter of the interfacial electric fields experienced by the monolayer nanosheet located within the electric double layer. The experimental Pourbaix diagrams were compared with a theoretical model, which derives the experimental Pourbaix slopes as a function of parameter f, a fraction of the interfacial potential drop experienced by the redox-active group. Interestingly, our study revealed that GNR-2DNS was strongly coupled to glassy carbon electrodes (f = 1), while RhGNR-2DNS was not (f = 0.15). We further investigated the HER mechanism by RhGNR-2DNS using electrochemical and X-ray absorption spectroelectrochemical methods and compared it to homogeneous molecular model compounds. RhGNR-2DNS was found to be an active HER electrocatalyst over a broader set of aqueous pH conditions than its molecular analogs. We find that the improved HER performance in the immobilized catalyst arises due to two factors. First, redox-active bipyrimidine-based ligands were shown to dramatically alter the activity of Rh sites by increasing the electron density at the active Rh center and providing RhGNR-2DNS with improved catalysis. Second, catalyst immobilization was found to prevent catalyst aggregation that was found to occur for the molecular analog in the basic pH. Overall, this study provides valuable insights into the mechanism by which catalyst immobilization can affect the overall electrocatalytic performance.
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Affiliation(s)
- Erik J Askins
- Department of Chemistry, University of Illinois Chicago, Chicago, Illinois 60607, United States
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Abdul Sarkar
- Department of Chemistry, University of Illinois Chicago, Chicago, Illinois 60607, United States
| | - Pouyan Navabi
- Department of Chemistry, University of Illinois Chicago, Chicago, Illinois 60607, United States
| | - Khagesh Kumar
- Department of Chemistry, University of Illinois Chicago, Chicago, Illinois 60607, United States
| | - Sarah Jasmin Finkelmeyer
- Leibniz Institute of Photonic Technology (IPHT), Jena 07745, Germany
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Jena 07743, Germany
| | - Martin Presselt
- Leibniz Institute of Photonic Technology (IPHT), Jena 07745, Germany
- SciClus GmbH & Co. KG, Jena 07745, Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Jena 07743, Germany
| | - Jordi Cabana
- Department of Chemistry, University of Illinois Chicago, Chicago, Illinois 60607, United States
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Ksenija D Glusac
- Department of Chemistry, University of Illinois Chicago, Chicago, Illinois 60607, United States
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
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Ignatova M, Manolova N, Rashkov I, Markova N, Kukeva R, Stoyanova R, Georgieva A, Toshkova R. 8-Hydroxyquinoline-5-Sulfonic Acid-Containing Poly(Vinyl Alcohol)/Chitosan Electrospun Materials and Their Cu 2+ and Fe 3+ Complexes: Preparation, Antibacterial, Antifungal and Antitumor Activities. Polymers (Basel) 2021; 13:2690. [PMID: 34451230 PMCID: PMC8400372 DOI: 10.3390/polym13162690] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/04/2021] [Accepted: 08/10/2021] [Indexed: 01/04/2023] Open
Abstract
Novel poly(vinyl alcohol) (PVA)/chitosan (Ch)-based fibrous materials containing an ionizable model drug, 8-hydroxyquinoline-5-sulfonic acid (SQ), were successfully fabricated by electrospinning. Complexes between the components of the crosslinked PVA/Ch/SQ mats and Cu2+ and Fe3+ ions were formed. The coordination of these ions in the mats was examined by electron paramagnetic resonance spectroscopy (EPR). The microbiological screening against S. aureus and C. albicans revealed that both the incorporation of SQ in the mats and the complexation with Cu2+ and Fe3+ imparted to these materials antibacterial and antifungal activities. Moreover, the SQ-containing mats and their complexes displayed good cytotoxicity against human cervical HeLa tumor cells. The most prominent was the cytotoxicity of the Cu2+ complex of the mats. The combined antibacterial, antifungal and in vitro antitumor activities render these novel materials promising candidates for wound dressing applications and for application in the local treatment of cervical tumors.
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Affiliation(s)
- Milena Ignatova
- Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev St. Bl. 103A, BG-1113 Sofia, Bulgaria;
| | - Nevena Manolova
- Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev St. Bl. 103A, BG-1113 Sofia, Bulgaria;
| | - Iliya Rashkov
- Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev St. Bl. 103A, BG-1113 Sofia, Bulgaria;
| | - Nadya Markova
- Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Bl. 26, BG-1113 Sofia, Bulgaria;
| | - Rositsa Kukeva
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev St. Bl. 11, BG-1113 Sofia, Bulgaria; (R.K.); (R.S.)
| | - Radostina Stoyanova
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev St. Bl. 11, BG-1113 Sofia, Bulgaria; (R.K.); (R.S.)
| | - Ani Georgieva
- Institute of Experimental Morphology, Pathology and Anthropology with Museum, Bulgarian Academy of Sciences, Acad. G. Bonchev St. Bl. 25, BG-1113 Sofia, Bulgaria; (A.G.); (R.T.)
| | - Reneta Toshkova
- Institute of Experimental Morphology, Pathology and Anthropology with Museum, Bulgarian Academy of Sciences, Acad. G. Bonchev St. Bl. 25, BG-1113 Sofia, Bulgaria; (A.G.); (R.T.)
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Salehzadeh H. Tunable oxidative release of N-acetyl-p-benzoquinone-imine and acetamide from electrochemically derived sub-monolayer acetaminophen modified glassy carbon electrode. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Yu WN, Manik DHN, Huang CJ, Chau LK. Effect of elimination on antifouling and pH-responsive properties of carboxybetaine materials. Chem Commun (Camb) 2017; 53:9143-9146. [DOI: 10.1039/c7cc04271j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
α- and β-substituted methyl carboxybetaine materials are developed to investigate the occurrence of elimination in the ethylene intercharge arm in a harsh basic solution.
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Affiliation(s)
- Wan-Ning Yu
- Department of Biomedical Sciences & Engineering
- National Central University
- Taoyuan 320
- Taiwan
| | - Desi Hanna Natalia Manik
- Department of Chemistry and Biochemistry and Center for Nano Bio-Detection (AIM-HI)
- National Chung Cheng University
- Chiayi 62102
- Taiwan
| | - Chun-Jen Huang
- Department of Biomedical Sciences & Engineering
- National Central University
- Taoyuan 320
- Taiwan
- Department of Chemical and Material Engineering
| | - Lai-Kwan Chau
- Department of Chemistry and Biochemistry and Center for Nano Bio-Detection (AIM-HI)
- National Chung Cheng University
- Chiayi 62102
- Taiwan
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Walgama C, Nerimetla R, Materer NF, Schildkraut D, Elman JF, Krishnan S. A Simple Construction of Electrochemical Liver Microsomal Bioreactor for Rapid Drug Metabolism and Inhibition Assays. Anal Chem 2015; 87:4712-8. [DOI: 10.1021/ac5044362] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Charuksha Walgama
- Department
of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Rajasekhara Nerimetla
- Department
of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Nicholas F. Materer
- Department
of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Deniz Schildkraut
- Filmetrics Application Lab—Rochester, 250 Packett’s Landing, Fairport, New York 14450, United States
| | - James F. Elman
- Filmetrics Application Lab—Rochester, 250 Packett’s Landing, Fairport, New York 14450, United States
| | - Sadagopan Krishnan
- Department
of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
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X-Ray Photoelectron Spectroscopic Characterization of Chemically Modified Electrodes Used as Chemical Sensors and Biosensors: A Review. CHEMOSENSORS 2015. [DOI: 10.3390/chemosensors3020070] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Swetha P, Devi KSS, Kumar AS. In-situ trapping and confining of highly redox active quinoline quinones on MWCNT modified glassy carbon electrode and its selective electrocatalytic oxidation and sensing of hydrazine. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.08.128] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Flexer V, Marque M, Donose BC, Virdis B, Keller J. Plasma treatment of electrodes significantly enhances the development of anodic electrochemically active biofilms. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.06.145] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Juan-Alcañiz J, Gielisse R, Lago AB, Ramos-Fernandez EV, Serra-Crespo P, Devic T, Guillou N, Serre C, Kapteijn F, Gascon J. Towards acid MOFs – catalytic performance of sulfonic acid functionalized architectures. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00272a] [Citation(s) in RCA: 131] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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