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Kurapati N, Janda DC, Balla RJ, Huang SH, Leonard KC, Amemiya S. Nanogap-Resolved Adsorption-Coupled Electron Transfer by Scanning Electrochemical Microscopy: Implications for Electrocatalysis. Anal Chem 2022; 94:17956-17963. [PMID: 36512745 DOI: 10.1021/acs.analchem.2c04008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Here, we demonstrate for the first time that the mechanism of adsorption-coupled electron-transfer (ACET) reactions can be identified experimentally. The electron transfer (ET) and specific adsorption of redox-active molecules are coupled in many electrode reactions with practical importance and fundamental interest. ACET reactions are often represented by a concerted mechanism. In reductive adsorption, an oxidant is simultaneously reduced and adsorbed as a reductant on the electrode surface through the ACET step. Alternatively, the non-concerted mechanism mediates outer-sphere reduction and adsorption separately when the reductant adsorption is reversible. In electrocatalysis, reversibly adsorbed reductants are ubiquitous and crucial intermediates. Moreover, electrocatalysis is complicated by the mixed mechanism based on simultaneous ACET and outer-sphere ET steps. In this work, we reveal the non-concerted mechanism for ferrocene derivatives adsorbed at highly oriented pyrolytic graphite as simple models. We enable the transient voltammetric mode of nanoscale scanning electrochemical microscopy (SECM) to kinetically control the adsorption step, which is required for the discrimination of non-concerted, concerted, and mixed mechanisms. Experimental voltammograms are compared with each mechanism by employing finite element simulation. The non-concerted mechanism is supported to indicate that the ACET step is intrinsically slower than its outer-sphere counterpart by at least four orders of magnitude. This finding implies that an ACET step is facilitated thermodynamically but may not be necessarily accelerated or catalyzed by the adsorption of the reductant. SECM-based transient voltammetry will become a powerful tool to resolve and understand electrocatalytic ACET reactions at the elementary level.
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Affiliation(s)
- Niraja Kurapati
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Donald C Janda
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Ryan J Balla
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Siao-Han Huang
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kevin C Leonard
- Center for Environmentally Beneficial Catalysis, Department of Chemical and Petroleum Engineering, University of Kansas, 1501 Wakarusa Drive, Lawrence, Kansas 66047, United States
| | - Shigeru Amemiya
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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3
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Chen R, Wang X, Wu K, Liu S, Zhang Y. Voltammetric Study and Modeling of the Electrochemical Oxidation Process and the Adsorption Effects of Luminol and Luminol Derivatives on Glassy Carbon Electrodes. Anal Chem 2022; 94:17625-17633. [PMID: 36475634 DOI: 10.1021/acs.analchem.2c04297] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Luminol is one of the most widely used electrochemiluminescence (ECL) reagents, yet the detailed mechanism and kinetics of the electrochemical oxidation of luminol remain unclear. We propose a model that describes the electrochemical oxidation of luminol as multiple electron transfer reactions followed by an irreversible chemical reaction, and we applied a finite element method simulation to analyze the electron transfer kinetics in alkaline solutions. Although negligible at higher pH values, the adsorption of luminol on the glassy carbon electrode became noticeable in a solution with pH = 12. Additionally, various types of adsorption behaviors were observed for luminol derivatives and analogues, indicating that the molecular structure affected not only the oxidation but also the adsorption process. The adsorption effect was analyzed through a model with a Langmuir isotherm to show that the saturated surface concentration as well as the reaction kinetics increased with decreasing pH, suggesting a competition for the active sites between the molecule and OH-. Moreover, we show that the ECL intensity could be boosted through the adsorption effect by collecting the ECL intensity generated through the electrochemical oxidation of luminol and a luminol analogue, L012, in a solution with pH = 13. In contrast with luminol, a significant adsorption effect was observed for L012 at pH = 13, and the ECL intensity was enhanced by the adsorbed species, especially at higher scan rates. The magnitude of the enhancement of the ECL intensity matched well with the simulation using our model.
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Affiliation(s)
- Ran Chen
- Jiangsu Province Key Laboratory of Critical Care Medicine, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing211189, China
| | - Xin Wang
- Jiangsu Province Key Laboratory of Critical Care Medicine, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing211189, China
| | - Kaiqing Wu
- Jiangsu Province Key Laboratory of Critical Care Medicine, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing211189, China
| | - Songqin Liu
- Jiangsu Province Key Laboratory of Critical Care Medicine, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing211189, China
| | - Yuanjian Zhang
- Jiangsu Province Key Laboratory of Critical Care Medicine, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing211189, China
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4
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Janda DC, Barma K, Kurapati N, Klymenko OV, Oleinick A, Svir I, Amatore C, Amemiya S. Systematic Assessment of Adsorption-Coupled Electron Transfer toward Voltammetric Discrimination between Concerted and Non-Concerted Mechanisms. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Maruyama J, Maruyama S, Kashiwagi Y, Watanabe M, Shinagawa T, Nagaoka T, Tamai T, Ryu N, Matsuo K, Ohwada M, Chida K, Yoshii T, Nishihara H, Tani F, Uyama H. Helically aligned fused carbon hollow nanospheres with chiral discrimination ability. NANOSCALE 2022; 14:3748-3757. [PMID: 35167641 DOI: 10.1039/d1nr07971a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
While the functions of carbon materials with precisely controlled nanostructures have been reported in many studies, their chiral discriminating abilities have not been reported yet. Herein, chiral discrimination is achieved using helical carbon materials devoid of chiral attachments. A Fe3O4 nanoparticle template with ethyl cellulose (carbon source) is self-assembled on dispersed multiwalled carbon nanotubes (MWCNTs) fixed in a lamellar structure, with helical nanoparticle alignment induced by the addition of a binaphthyl derivative. Carbonization followed by template removal produces helically aligned fused carbon hollow nanospheres (CHNSs) with no chiral molecules left. Helicity is confirmed using vacuum-ultraviolet circular dichroism spectroscopy. Chiral discrimination, as revealed by the electrochemical reactions of binaphthol and a chiral ferrocene derivative in aqueous and nonaqueous electrolytes, respectively, is attributable to the chiral space formed between the CHNS and MWCNT surfaces.
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Affiliation(s)
- Jun Maruyama
- Osaka Research Institute of Industrial Science and Technology, 1-6-50, Morinomiya, Joto-ku, Osaka 536-8553, Japan.
| | - Shohei Maruyama
- Osaka Research Institute of Industrial Science and Technology, 1-6-50, Morinomiya, Joto-ku, Osaka 536-8553, Japan.
| | - Yukiyasu Kashiwagi
- Osaka Research Institute of Industrial Science and Technology, 1-6-50, Morinomiya, Joto-ku, Osaka 536-8553, Japan.
| | - Mitsuru Watanabe
- Osaka Research Institute of Industrial Science and Technology, 1-6-50, Morinomiya, Joto-ku, Osaka 536-8553, Japan.
| | - Tsutomu Shinagawa
- Osaka Research Institute of Industrial Science and Technology, 1-6-50, Morinomiya, Joto-ku, Osaka 536-8553, Japan.
| | - Toru Nagaoka
- Osaka Research Institute of Industrial Science and Technology, 1-6-50, Morinomiya, Joto-ku, Osaka 536-8553, Japan.
| | - Toshiyuki Tamai
- Osaka Research Institute of Industrial Science and Technology, 1-6-50, Morinomiya, Joto-ku, Osaka 536-8553, Japan.
| | - Naoya Ryu
- Kumamoto Industrial Research Institute, 3-11-38, Higashimachi, Higashi-ku, Kumamoto 862-0901, Japan
| | - Koichi Matsuo
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - Mao Ohwada
- Advanced Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Koki Chida
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Takeharu Yoshii
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Hirotomo Nishihara
- Advanced Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Fumito Tani
- Institute for Materials Chemistry and Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hiroshi Uyama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita 565-0871, Japan
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Jarosova R, Irikura K, Rocha‐Filho RC, Swain GM. Detection of Pyocyanin with a Boron‐doped Diamond Electrode Using Flow Injection Analysis with Amperometric Detection and Square Wave Voltammetry. ELECTROANAL 2022. [DOI: 10.1002/elan.202100562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Romana Jarosova
- Department of Analytical Chemistry UNESCO Laboratory of Environmental Electrochemistry Charles University 12843 Prague 2 Czech Republic
- Department of Chemistry Michigan State University 48824-1322 East Lansing MI United States
| | - Kallyni Irikura
- Department of Chemistry Universidade Federal de São Carlos (UFSCar) C.P. 676 13560-970 São Carlos SP Brazil
- Department of Chemistry Michigan State University 48824-1322 East Lansing MI United States
| | - Romeu C. Rocha‐Filho
- Department of Chemistry Universidade Federal de São Carlos (UFSCar) C.P. 676 13560-970 São Carlos SP Brazil
| | - Greg M. Swain
- Department of Chemistry Michigan State University 48824-1322 East Lansing MI United States
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11
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Li B, Pu W, Xu H, Ge L, Kwok HF, Hu L. Magneto-controlled flow-injection device for electrochemical immunoassay of alpha-fetoprotein on magnetic beads using redox-active ferrocene derivative polymer nanospheres. Analyst 2019; 144:1433-1441. [DOI: 10.1039/c8an01978a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A new electrochemical immunosensing protocol by coupling with a magneto-controlled flow-through microfluidic device was developed for the sensitive detection of alpha-fetoprotein (AFP) on magnetic beads (MB) using ferrocene derivative polymer nanospheres (FDNP) as the electroactive mediators.
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Affiliation(s)
- Bin Li
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- Nanjing University of Chinese Medicine
- Nanjing
- China
- Institute of Translational Medicine
| | - Wenyuan Pu
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- Nanjing University of Chinese Medicine
- Nanjing
- China
| | - Houxi Xu
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- Nanjing University of Chinese Medicine
- Nanjing
- China
| | - Lilin Ge
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- Nanjing University of Chinese Medicine
- Nanjing
- China
| | - Hang Fai Kwok
- Institute of Translational Medicine
- Faculty of Health Sciences
- University of Macau
- Avenida de Universidade
- Macau SAR
| | - Lihong Hu
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- Nanjing University of Chinese Medicine
- Nanjing
- China
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