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Kim M, Jang JH, Nam MG, Yoo PJ. Polyphenol-Derived Carbonaceous Frameworks with Multiscale Porosity for High-Power Electrochemical Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2406251. [PMID: 39078377 DOI: 10.1002/adma.202406251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 06/30/2024] [Indexed: 07/31/2024]
Abstract
With the escalating global demand for electric vehicles and sustainable energy solutions, increasing focus is placed on developing electrochemical systems that offer fast charging and high-power output, primarily governed by mass transport. Accordingly, porous carbons have emerged as highly promising electrochemically active or supporting materials due to expansive surface areas, tunable pore structures, and superior electrical conductivity, accelerating surface reaction. Yet, while substantial research has been devoted to crafting various porous carbons to increase specific surface areas, the optimal utilization of the surfaces remains underexplored. This review emphasizes the critical role of the fluid dynamics within multiscale porous carbonaceous electrodes, leading to substantially enhanced pore utilization in electrochemical systems. It elaborates on strategies of using sacrificial templates for incorporating meso/macropores into microporous carbon matrix, while exploiting the unique properties of polyphenol moieties such as sustainable carbons derived from biomass, inherent adhesive/cohesive interactions with template materials, and facile complexation capabilities with diverse materials, thereby enabling adaptive structural modulations. Furthermore, it explores how multiscale pore configurations influence pore-utilization efficiency, demonstrating advantages of incorporating multiscale pores. Finally, synergistic impact on the high-power electrochemical systems is examined, attributed to improved fluid-dynamic behavior within the carbonaceous frameworks, providing insights for advancing next-generation high-power electrochemical applications.
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Affiliation(s)
- Minjun Kim
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Joon Ho Jang
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Myeong Gyun Nam
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Pil J Yoo
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
- SKKU Institute of Energy Science and Technology (SIEST), Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
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2
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Metto M, Tesfaye A, Atlabachew M, Abebe A, Fentahun T, Munshea A. A Novel Poly(cytosine)-Based Electrochemical Biosensor for Sensitive and Selective Determination of Guanine in Biological Samples. ACS OMEGA 2024; 9:26222-26234. [PMID: 38911807 PMCID: PMC11191103 DOI: 10.1021/acsomega.4c01939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 05/16/2024] [Accepted: 05/30/2024] [Indexed: 06/25/2024]
Abstract
The novel poly(cytosine)-modified glassy carbon electrode-based electrochemical sensor was fabricated potentiodynamically for the detection of Guanine (G) in clinical and biological samples. The surface of the electrode was successfully activated by electropolymerization, and about a 7.5-fold current improvement due to modification was achieved. From the analysis of the dependence of peak current and peak potential on a scan rate, a higher R 2 for the peak current on the square root of scan rate (R 2 = 0.999) than the dependence of peak current on scan rate (R 2 = 0.982) indicated that the oxidation of G at poly(cytosine)/GCE was predominantly diffusion controlled. The oxidative peak response of the electrode revealed a high linear range of G concentration (0.1-200 μM) under optimized conditions. The detection limit and limit of quantification were 6.10 and 20.13 nM, respectively, associated with the %RSD of under 1%. The validation of the developed electrochemical sensor for the determination of G was investigated by analyzing human urine DNA and serum samples with spike recovery results in the range of 98.20-103.70% with the interferent recovery percentage in the range of 97.86-103.10% containing 50-300% of potential interferents. The newly designed sensor demonstrated the highest level of performance for the G detection in real samples.
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Affiliation(s)
- Melaku Metto
- Department
of Chemistry, College of Science, Bahir
Dar University, Bahir
Dar 6000, Ethiopia
- Department
of Chemistry, College of Natural and Computational Sciences, Injibara University, Injibara 6400, Ethiopia
| | - Alemu Tesfaye
- Department
of Chemistry, College of Science, Bahir
Dar University, Bahir
Dar 6000, Ethiopia
| | - Minaleshewa Atlabachew
- Department
of Chemistry, College of Science, Bahir
Dar University, Bahir
Dar 6000, Ethiopia
| | - Atakilt Abebe
- Department
of Chemistry, College of Science, Bahir
Dar University, Bahir
Dar 6000, Ethiopia
| | - Tihunie Fentahun
- Department
of Chemistry, College of Science, Bahir
Dar University, Bahir
Dar 6000, Ethiopia
| | - Abaineh Munshea
- Department
of Chemistry, College of Science, Bahir
Dar University, Bahir
Dar 6000, Ethiopia
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3
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Magchiels G, Claessens N, Meersschaut J, Vantomme A. Enhanced accuracy through machine learning-based simultaneous evaluation: a case study of RBS analysis of multinary materials. Sci Rep 2024; 14:8186. [PMID: 38589457 PMCID: PMC11001917 DOI: 10.1038/s41598-024-58265-7] [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: 12/01/2023] [Accepted: 03/27/2024] [Indexed: 04/10/2024] Open
Abstract
We address the high accuracy and precision demands for analyzing large in situ or in operando spectral data sets. A dual-input artificial neural network (ANN) algorithm enables the compositional and depth-sensitive analysis of multinary materials by simultaneously evaluating spectra collected under multiple experimental conditions. To validate the developed algorithm, a case study was conducted analyzing complex Rutherford backscattering spectrometry (RBS) spectra collected in two scattering geometries. The dual-input ANN analysis excelled in providing a systematic analysis and precise results, showcasing its robustness in handling complex data and minimizing user bias. A comprehensive comparison with human supervision analysis and conventional single-input ANN analysis revealed a reduced susceptibility of the dual-input ANN analysis to inaccurately known setup parameters, a common challenge in material characterization. The developed multi-input approach can be extended to a wide range of analytical techniques, in which the combined analysis of measurements performed under different experimental conditions is beneficial for disentangling details of the material properties.
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Affiliation(s)
- Goele Magchiels
- Quantum Solid-State Physics, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium.
| | - Niels Claessens
- Quantum Solid-State Physics, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
- IMEC, Kapeldreef 75, 3001, Leuven, Belgium
| | | | - André Vantomme
- Quantum Solid-State Physics, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
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4
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Wu TH, Liu YS, Hong CT, Hou BW. Binary and nanostructured NiMn perovskite fluorides as efficient electrocatalysts for urea oxidation reaction. J Colloid Interface Sci 2024; 653:1094-1102. [PMID: 37783009 DOI: 10.1016/j.jcis.2023.09.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 09/21/2023] [Accepted: 09/24/2023] [Indexed: 10/04/2023]
Abstract
Urea electrolysis holds tremendous promise to provide green and sustainable energy and environmental solutions, because it can simultaneously remedy urea-containing wastewater and provide energy-saving hydrogen. However, the development of this emerging technology remains challenging mainly due to a dearth of high-performance electrocatalysts for efficient urea oxidation reaction (UOR). Perovskite fluorides have the advantages of intrinsic 3D diffusion pathways, robust architecture, and tunable chemical composition, thus receiving increasing attention in many applications. In this work, the UOR performances of a series of ABF3 samples (A = K; B = Ni/Mn, Ni/Co, Co/Mn) with various compositions are investigated in a systematic fashion for the first time. Among the binary samples, KNMF41 (Ni/Mn atomic ratio = 4:1) is the optimal sample with reduced overpotential (reaching 100 mA cm-2 at 1.43 V), low Tafel slope (40 mV dec-1), enhanced reaction rate constant (6.3 × 105 cm3 mol-1 s-1), and high turnover frequency (TOF, 0.19 s-1 at 1.60 V) toward urea oxidation. By comparing with NiCo and CoMn samples, the binary NiMn design is confirmed to endow the perovskite fluoride with higher electrocatalytic activity, thanks to the directed adsorption of urea molecules on the adjacent NiMn active sites. This work presents a targeted synthetic strategy for obtaining efficient electrocatalysts.
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Affiliation(s)
- Tzu Ho Wu
- Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin 64002, Taiwan.
| | - Yong Shan Liu
- Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin 64002, Taiwan
| | - Chung Ting Hong
- Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin 64002, Taiwan
| | - Bo-Wei Hou
- Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin 64002, Taiwan
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5
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Nazari M, Ghaemmaghami M. Approach to Evaluation of Electrocatalytic Water Splitting Parameters, Reflecting Intrinsic Activity: Toward the Right Pathway. CHEMSUSCHEM 2023; 16:e202202126. [PMID: 36867113 DOI: 10.1002/cssc.202202126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 03/03/2023] [Indexed: 06/10/2023]
Abstract
The development of transition metal-based non-precious-metal electrocatalysts for energy storage and conversion systems has received a lot of interest recently. To further this subject in the proper way given the development of electrocatalysts, a fair comparison of their respective performance is necessary. This Review investigates the parameters used for the comparison of electrocatalyst activity. Significant evaluation criteria employed in electrochemical water splitting studies are the overpotential at defined current density usually at 10 mA per geometric surface area, Tafel slope, exchange current density, mass activity, specific activity and turnover frequency (TOF). This Review will discuss how to identify the specific activity and TOF by electrochemical and non-electrochemical methods to represent intrinsic activity as well as the benefits and uncertainties of each technique, ensuring that each method is applied correctly when calculating intrinsic activity metrics.
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Affiliation(s)
- Mahrokh Nazari
- Department of Chemistry, Tarbiat Modares University, P.O. Box, 14115-175, Tehran, Iran
| | - Mostafa Ghaemmaghami
- Department of Chemistry, Tarbiat Modares University, P.O. Box, 14115-175, Tehran, Iran
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6
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Guler AC, Antos J, Masar M, Urbanek M, Machovsky M, Kuritka I. Comprehensive evaluation of photoelectrochemical performance dependence on geometric features of ZnO nanorod electrodes. NANOSCALE ADVANCES 2023; 5:3091-3103. [PMID: 37260485 PMCID: PMC10228492 DOI: 10.1039/d3na00089c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 04/26/2023] [Indexed: 06/02/2023]
Abstract
The impact of geometric features, light absorption spectra, and electrochemical active surface area on photoelectrochemical properties was investigated in this work. Nanoforests of ZnO nanorods with rationally controlled morphologies were grown on ITO substrates by the hydrothermal method and utilized as a model for this purpose. The size of the nanorods was systematically adjusted by varying the concentration of polyethyleneimine as a cation surfactant in the growth solution. It was found that the emergent geometric characteristics (i.e. the aspect ratio) increased almost at the same pace as the electrochemically active surface area, but the light scattering effect slightly increased as a result of the random spatial orientation of the nanorods. The large surface area and the void space between nanorods increased the photon-to-current conversion efficiency by promoting the hole transfer process at the electrode/electrolyte interface. A maximum photocurrent density of 0.06 mA cm-2 (0.5 V vs. NHE) for smaller diameter and length ZnO nanorods (ZnO-P1) was obtained under 365 nm UV light illumination. Additionally, we provide visual evidence that a shorter photogenerated hole diffusion distance results in improved charge separation efficiency using Mn2+ as the photogenerated hole imaging agent. Therefore, the present work demonstrates a facile strategy for nanoforest morphology improvement for generating strong contact at the ZnO NR electrode/electrolyte interface, which is favourable in energy conversion and storage technologies.
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Affiliation(s)
- Ali Can Guler
- Centre of Polymer Systems, Tomas Bata University in Zlin Tr. T. Bati 5678 760 01 Zlin Czech Republic
| | - Jan Antos
- Centre of Polymer Systems, Tomas Bata University in Zlin Tr. T. Bati 5678 760 01 Zlin Czech Republic
| | - Milan Masar
- Centre of Polymer Systems, Tomas Bata University in Zlin Tr. T. Bati 5678 760 01 Zlin Czech Republic
| | - Michal Urbanek
- Centre of Polymer Systems, Tomas Bata University in Zlin Tr. T. Bati 5678 760 01 Zlin Czech Republic
| | - Michal Machovsky
- Centre of Polymer Systems, Tomas Bata University in Zlin Tr. T. Bati 5678 760 01 Zlin Czech Republic
| | - Ivo Kuritka
- Centre of Polymer Systems, Tomas Bata University in Zlin Tr. T. Bati 5678 760 01 Zlin Czech Republic
- Department of Chemistry, Faculty of Technology, Tomas Bata University in Zlín Vavrečkova 5669 760 01 Zlín Czech Republic
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7
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Zhou J, Meng X, Ouyang P, Zhang R, Liu H, Xu C, Liu Z. Electrochemical behavior and electrodeposition of Fe-Co-Ni thin films in choline chloride/urea deep eutectic solvent. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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α-MnO2 Nanowire Structure Obtained at Low Temperature with Aspects in Environmental Remediation and Sustainable Energy Applications. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12136821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Hydrothermally obtained α-MnO2 nanowire characterizations confirm the tetragonal crystalline structure that is several micrometers long and 20–30 nm in diameter with narrow distributions in their dimensions. The absorption calculated from diffuse reflectance of α-MnO2 occurred in the visible region ranging from 400 to 550 nm. The calculated band gap with Quantum Espresso using HSE approximation is ~2.4 eV for the ferromagnetic case, with a slightly larger gap of 2.7 eV for the antiferromagnetic case, which is blue-shifted as compared to the experimental. The current work also illustrates the transformations that occur in the material under heat treatment during TGA analysis, with the underlying mechanism. Electrochemical studies on graphite supports modified with α-MnO2 compositions revealed the modified electrode with the highest electric double-layer capacitance of 3.444 mF cm−2. The degradation rate of an organic dye—rhodamine B (RhB)—over the compound in an acidic medium was used to examine the catalytic and photocatalytic activities of α-MnO2. The peak shape changes in the time-dependent visible spectra of RhB during the photocatalytic reaction were more complex and progressive. In two hours, RhB degradation reached 97% under sun irradiation and 74% in the dark.
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9
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Dmitriev D, Lobinsky A, Popkov V. Morphology-dependent impedance and electrocatalytic activity of Ni-Co nanocoatings. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Kim J, Jung H, Jung SM, Hwang J, Kim DY, Lee N, Kim KS, Kwon H, Kim YT, Han JW, Kim JK. Tailoring Binding Abilities by Incorporating Oxophilic Transition Metals on 3D Nanostructured Ni Arrays for Accelerated Alkaline Hydrogen Evolution Reaction. J Am Chem Soc 2020; 143:1399-1408. [DOI: 10.1021/jacs.0c10661] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Jaerim Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Hyeonjung Jung
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Sang-Mun Jung
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Jinwoo Hwang
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Dong Yeong Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Noho Lee
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Kyu-Su Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Hyunah Kwon
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany
| | - Yong-Tae Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Jeong Woo Han
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Jong Kyu Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
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11
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Fink MF, Eckhardt J, Khadke P, Gerdes T, Roth C. Bifunctional
α
‐MnO
2
and Co
3
O
4
Catalyst for Oxygen Electrocatalysis in Alkaline Solution. ChemElectroChem 2020. [DOI: 10.1002/celc.202001325] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Michael F. Fink
- Chair of Electrochemical Process Engineering University of Bayreuth Universitätsstraße 30 95447 Bayreuth Germany
- Bavarian Center for Battery Technology (BayBatt) University of Bayreuth 95447 Bayreuth Germany
| | - Julia Eckhardt
- Chair of Electrochemical Process Engineering University of Bayreuth Universitätsstraße 30 95447 Bayreuth Germany
| | - Prashant Khadke
- Chair of Electrochemical Process Engineering University of Bayreuth Universitätsstraße 30 95447 Bayreuth Germany
| | - Thorsten Gerdes
- Chair of Ceramic Materials Engineering Keylab Glass Technology University of Bayreuth Prof.-Rüdiger-Bormann-Str. 1 95447 Bayreuth Germany
- Bavarian Center for Battery Technology (BayBatt) University of Bayreuth 95447 Bayreuth Germany
| | - Christina Roth
- Chair of Electrochemical Process Engineering University of Bayreuth Universitätsstraße 30 95447 Bayreuth Germany
- Bavarian Center for Battery Technology (BayBatt) University of Bayreuth 95447 Bayreuth Germany
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12
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Saranya J, Sreeja BS, Padmalaya G, Radha S, Arivanandan M. Microwave Thermally Assisted Porous Structured Cerium Oxide/Zinc Oxide Design: Fabrication, Electrochemical Activity Towards Pb Ions, Anticancer Assessment in HeLa and VERO Cell Lines. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01809-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Park YJ, Lee J, Park YS, Yang J, Jang MJ, Jeong J, Choe S, Lee JW, Kwon JD, Choi SM. Electrodeposition of High-Surface-Area IrO 2 Films on Ti Felt as an Efficient Catalyst for the Oxygen Evolution Reaction. Front Chem 2020; 8:593272. [PMID: 33195098 PMCID: PMC7645052 DOI: 10.3389/fchem.2020.593272] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 09/18/2020] [Indexed: 01/08/2023] Open
Abstract
Under acidic conditions, IrO2 exhibits high catalytic activity with respect to the oxygen evolution reaction (OER). However, the practical application of Ir-based catalysts is significantly limited owing to their high cost in addition to the scarcity of the metal. Therefore, it is necessary to improve the efficiency of the utilization of such catalysts. In this study, IrO2-coated Ti felt (IrO2/Ti) electrodes were prepared as high-efficiency catalysts for the OER under acidic conditions. By controlling the surface roughness of the Ti substrate via wet etching, the optimum Ti substrate surface area for application in the IrO2/Ti electrode was determined. Additionally, the IrO2 film that was electrodeposited on the 30 min etched Ti felt had a large surface area and a uniform morphology. Furthermore, there were no micro-cracks and the electrode obtained (IrO2/Ti-30) exhibited superior catalytic performance with respect to the OER, with a mass activity of 362.3 A gIr-1 at a potential of 2.0 V (vs. RHE) despite the low Ir loading (0.2 mg cm−2). Therefore, this proposed strategy for the development of IrO2/Ti electrodes with substrate surface control via wet etching has potential for application in the improvement of the efficiency of catalyst utilization with respect to the OER.
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Affiliation(s)
- Yu Jin Park
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea.,Department of Materials Science and Engineering, Pusan National University, Busan, South Korea
| | - Jooyoung Lee
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Yoo Sei Park
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea.,Department of Materials Science and Engineering, Pusan National University, Busan, South Korea
| | - Juchan Yang
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Myeong Je Jang
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Jaehoon Jeong
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Seunghoe Choe
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Jung Woo Lee
- Department of Materials Science and Engineering, Pusan National University, Busan, South Korea
| | - Jung-Dae Kwon
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Sung Mook Choi
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
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14
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Kuznetsov V, Gamburg Y, Zhulikov V, Krutskikh V, Filatova E, Trigub A, Belyakova O. Electrodeposited NiMo, CoMo, ReNi, and electroless NiReP alloys as cathode materials for hydrogen evolution reaction. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136610] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Abstract
The geometry of porous materials is complex, and the determination of the true surface area is important because it affects current density, how certain reactions will progress, their rates, etc. In this work, we have investigated the dependence of the electrochemical deposition of copper coatings on the geometry of the copper substrate (flat plates or 3D foams). Chronoamperometric measurements show that copper deposition occurs 3 times faster on copper foams than on a flat electrode with the same geometric area in the same potential range, making metal foams great electrodes for electrowinning. Using electrochemical impedance spectroscopy (EIS), the mechanism of copper deposition was determined at various concentrations and potentials, and the capacities of the double electric layer (DL) for both types of electrodes were calculated. The DL capacity on the foam electrodes is up to 14 times higher than that on the plates. From EIS data, it was determined that the charge transfer resistance on the Cu foam electrode is 1.5–1.7 times lower than that on the Cu plate electrode. Therefore, metal foam electrodes are great candidates to be used for processes that are controlled by activation polarization or by the adsorption of intermediate compounds (heterogeneous catalysis) and processes occurring on the entire surface of the electrode.
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16
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In Vitro Corrosion of Titanium Nitride and Oxynitride-Based Biocompatible Coatings Deposited on Stainless Steel. COATINGS 2020. [DOI: 10.3390/coatings10080710] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The reactive cathodic arc deposition technique was used to produce Ti nitride and oxynitride coatings on 304 stainless steel substrates (SS). Both mono (SS/TiN, SS/TiNO) and bilayer coatings (SS/TiN/TiNO and SS/TiNO/TiN) were investigated in terms of elemental and phase composition, microstructure, grain size, morphology, and roughness. The corrosion behavior in a solution consisting of 0.10 M NaCl + 1.96 M H2O2 was evaluated, aiming for biomedical applications. The results showed that the coatings were compact, homogeneously deposited on the substrate, and displaying rough surfaces. The XRD analysis indicated that both mono and bilayer coatings showed only cubic phases with (111) and (222) preferred orientations. The highest crystallinity was shown by the SS/TiN coating, as indicated also by the largest grain size of 23.8 nm, which progressively decreased to 16.3 nm for the SS/TiNO monolayer. The oxynitride layers exhibited the best in vitro corrosion resistance either as a monolayer or as a top layer in the bilayer structure, making them a good candidate for implant applications.
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17
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Buathet S, Simalaotao K, Reunchan P, Vailikhit V, Teesetsopon P, Raknual D, Kitisripanya N, Tubtimtae A. Electrochemical performance of Bi2Te3 heterostructure thin film and Cu7Te4 nanocrystals on undoped and In3+-doped WO3 films for energy storage applications. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136049] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Yagati AK, Go A, Vu NH, Lee MH. A MoS2–Au nanoparticle-modified immunosensor for T3 biomarker detection in clinical serum samples. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136065] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Sebarchievici I, Taranu BO, Rus SF, Fagadar-Cosma E. Electrochemical behaviour and analytical applications of a manganese porphyrin – silica hybrid film prepared by pulsed laser deposition. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114127] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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20
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Hughes MA, Allen JA, Donne SW. Characterization of carbonate derived carbons through electrochemical impedance spectroscopy. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Connor P, Schuch J, Kaiser B, Jaegermann W. The Determination of Electrochemical Active Surface Area and Specific Capacity Revisited for the System MnOx as an Oxygen Evolution Catalyst. ACTA ACUST UNITED AC 2020. [DOI: 10.1515/zpch-2019-1514] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In the last decades several different catalysts for the electrochemical water splitting reaction have been designed and tested. In so-called benchmark papers they are compared with respect to their efficiency and activity. In order to relate the different catalyst to each other the definition of well-defined procedures is required. Two different methods are mainly used: Either the normalization with respect to the geometric surface area or to the catalyst loading. Most often only one of these values is available for a sample and the other one cannot be estimated easily. One approach in electrocatalysis is to determine the Helmholtz double layer capacitance (DLC) and deduce the electrochemical active surface area (ECSA). The DLC can be obtained from two different methods, either using differential capacitance measurement (DCM) or impedance spectroscopy (EIS). The second value needed for the calculation of the ECSA is the specific capacitance, which is the capacitance for a perfectly flat surface of given catalyst material. Here, we present the determination of the different capacitance values using manganese oxide as the exemplary model for the oxygen evolution reaction (OER). We determine the capacitance by DCM and EIS to calculate the ECSA using literature values for the specific capacitance. The obtained values are comparable from the two methods, but are much larger than the surface areas obtained by atomic force microscopy. Therefore, we consider the possibility of using the measured AFM area together with the Helmholtz capacitance to determine the specific capacitances for this material class. The comparison of these results with literature values illustrates the actual limits of the ECSA method, which will be discussed in this paper.
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Affiliation(s)
- Paula Connor
- Materialwissenschaft, Oberflächenforschung , Otto-Berndt-Straße 3 , Darmstadt, Hessen 64287 , Germany
| | - Jona Schuch
- Materialwissenschaft, Oberflächenforschung , Otto-Berndt-Straße 3 , Darmstadt, Hessen 64287 , Germany
| | - Bernhard Kaiser
- Materialwissenschaft, Oberflächenforschung , Otto-Berndt-Straße 3 , Darmstadt, Hessen 64287 , Germany
| | - Wolfram Jaegermann
- Materialwissenschaft, Oberflächenforschung , Otto-Berndt-Straße 3 , Darmstadt, Hessen 64287 , Germany
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22
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Kuznetsov V, Gamburg Y, Zhulikov V, Batalov R, Filatova E. Re–Ni cathodes obtained by electrodeposition as a promising electrode material for hydrogen evolution reaction in alkaline solutions. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.05.156] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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23
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Defnet PA, Han C, Zhang B. Temporally-Resolved Ultrafast Hydrogen Adsorption and Evolution on Single Platinum Nanoparticles. Anal Chem 2019; 91:4023-4030. [DOI: 10.1021/acs.analchem.8b05463] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Peter A. Defnet
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Chu Han
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Bo Zhang
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
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24
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Influence of Surface Treatment on the Kinetics of the Hydrogen Evolution Reaction on Bulk and Porous Nickel Materials. Electrocatalysis (N Y) 2019. [DOI: 10.1007/s12678-019-0506-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Jo J, Yoon J, Lee T, Cho HY, Lee JY, Choi JW. H 2O 2 biosensor consisted of hemoglobin-DNA conjugate on nanoporous gold thin film electrode with electrochemical signal enhancement. NANO CONVERGENCE 2019; 6:1. [PMID: 30603798 PMCID: PMC6314933 DOI: 10.1186/s40580-018-0172-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 12/24/2018] [Indexed: 05/04/2023]
Abstract
In this research, we developed electrochemical biosensor which was composed of hemoglobin (Hb)-DNA conjugate on nanoporous gold thin film (NPGF) for hydrogen peroxide (H2O2) detection. For the first time, Hb and DNA was conjugated as a sensing platform for uniform orientation of Hb on electrode. The newly developed Hb-DNA conjugate was designed to prevent Hb from aggregation on electrode. DNA hybridization of Hb-DNA conjugate and complementary DNA (cDNA) on NPGF electrode induced uniformly assembled biosensor. Furthermore, NPGF electrode fabrication method was introduced to the increment of the surface area. To confirm the conjugation of Hb-DNA conjugate, sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and ultraviolet-visible spectroscopy (UV-VIS) were used. Formation of the NPGF electrode was verified by scanning electron microscope (SEM). Atomic force microscopy (AFM) was operated for the confirmation of Hb-DNA immobilization on electrode. The electrochemical property of fabricated electrode was investigated by cyclic voltammetry (CV). Also, H2O2 sensing performance of fabricated electrode was investigated by amperometric i-t curve technique. This sensor showed a wide linear range from 0.00025 to 5.00 mM and a correlation coefficient of R2 = 0.9986. The detection limit was 250 nM. Proposed biosensor can be utilized as a sensing platform for development of biosensor.
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Affiliation(s)
- Jinhee Jo
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul, 121-742 Republic of Korea
| | - Jinho Yoon
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul, 121-742 Republic of Korea
| | - Taek Lee
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul, 121-742 Republic of Korea
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul, 01897 Republic of Korea
| | - Hyeon-Yeol Cho
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul, 121-742 Republic of Korea
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA
| | - Ji-Young Lee
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul, 121-742 Republic of Korea
| | - Jeong-Woo Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul, 121-742 Republic of Korea
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26
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Mu Y, Huang C, Li H, Chen L, Zhang D, Yang Z. Electrochemical degradation of ciprofloxacin with a Sb-doped SnO2 electrode: performance, influencing factors and degradation pathways. RSC Adv 2019; 9:29796-29804. [PMID: 35531541 PMCID: PMC9071943 DOI: 10.1039/c9ra04860j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 09/04/2019] [Indexed: 11/21/2022] Open
Abstract
Sb-doped SnO2 electrodes were prepared with the practical sol–gel method and were used for the electrocatalytic degradation of ciprofloxacin (CIP) in aqueous solution. Results from the electrochemical characterization (including cyclic voltammetry, linear sweep voltammetry, and electrochemical impedance spectroscopy) showed that the electrode with 16 coating times (SSO-16) had the highest oxygen evolution potential of 2.2 V (vs. SCE) and the highest electrochemically active area of 3.74 cm2. The results of scanning electron microscopy and X-ray diffraction showed that the coating times could affect the surface morphology and crystal structure of the electrodes, and the SSO-16 electrode had a denser surface, higher crystallinity, and smaller grain size (28.6 nm). Moreover, the experimental parameters for CIP degradation with SSO-16 were optimized, and the removal ratio of CIP reached to almost 100% within 60 min. In addition, the possible degradation pathways of CIP were proposed. And the stability and reusability of the SSO-16 electrode were also studied. These results are valuable for the preparation of high electrocatalytic performance electrodes by a sol–gel coating method for electrochemical degradation of antibiotics. Sb-doped SnO2 electrodes with different coating times were prepared by an optimum sol–gel method and the application on the electrocatalytic degradation of ciprofloxacin in aqueous solution were investigated.![]()
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Affiliation(s)
- Yanguang Mu
- Center for Environment and Water Resources
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- PR China
| | - Cong Huang
- Center for Environment and Water Resources
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- PR China
| | - Haipu Li
- Center for Environment and Water Resources
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- PR China
| | - Leilei Chen
- Center for Environment and Water Resources
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- PR China
| | - Ding Zhang
- Center for Environment and Water Resources
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- PR China
| | - Zhaoguang Yang
- Center for Environment and Water Resources
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- PR China
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Bairagi PK, Gupta GS, Verma N. Fe‐enriched Clay‐coated and Reduced Graphene Oxide‐modified N‐doped Polymer Nanocomposite: A Natural Recognition Element‐based Sensing Electrode for DNT. ELECTROANAL 2018. [DOI: 10.1002/elan.201800585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Pallab K. Bairagi
- Department of Chemical EngineeringIndian Institute of Technology Kanpur Kanpur- 208016 India
| | - Govind S. Gupta
- Center for Environmental Science and EngineeringIndian Institute of Technology Kanpur Kanpur- 208016 India
| | - Nishith Verma
- Department of Chemical EngineeringIndian Institute of Technology Kanpur Kanpur- 208016 India
- Center for Environmental Science and EngineeringIndian Institute of Technology Kanpur Kanpur- 208016 India
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28
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Njoku CB, Kriek RJ. Application of Sm0.8Sr0.2Fe1-xCoxO3-δ (x = 0.2, 0.5, 0.8) Perovskite for the Oxygen Evolution Reaction in Alkaline Media. Electrocatalysis (N Y) 2018. [DOI: 10.1007/s12678-018-0498-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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29
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Thota R, Ganesh V. High-Performance Electrocatalysts for Hydrogen Evolution Reaction Using Flexible Electrodes Made up of Chemically Modified Polyester Films. ChemistrySelect 2018. [DOI: 10.1002/slct.201701446] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Raju Thota
- Electrodics and Electrocatalysis (EEC) Division; CSIR - Central Electrochemical Research Institute (CSIR - CECRI); Karaikudi - 630003, Tamilnadu India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi - 110025 India
| | - Venkatachalam Ganesh
- Electrodics and Electrocatalysis (EEC) Division; CSIR - Central Electrochemical Research Institute (CSIR - CECRI); Karaikudi - 630003, Tamilnadu India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi - 110025 India
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30
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Abstract
Porous metals and alloys, such as those fabricated via electrochemical dealloying, are of interest for a variety of energy applications, ranging from their potential for enhanced catalytic behavior to their use as high surface area supports for pseudocapacitor materials. Here, the electrochemical dealloying process was explored for electrodeposited binary NiCo and ternary NiCoCu thin films. For each of the four different metal ratios, films were dealloyed using linear sweep voltammetry to various potentials in order to gain insight into the evolution of the film over the course of the linear sweep. Electrochemical capacitance, scanning electron microscopy, and energy dispersive X-ray spectroscopy were used to examine the structure and composition of each sample before and after linear sweep voltammetry was performed. For NiCo films, dealloying resulted in almost no change in composition but did result in an increased capacitance, with greater increases occurring at higher linear sweep potentials, indicating the removal of material from the films. Dealloying also resulted in the appearance of large pores on the surface of the high nickel percentage NiCo films, while low nickel percentage NiCo films had little observable change in morphology. For NiCoCu films, Cu was almost completely removed at linear sweep potentials greater than 0.5 V versus Ag/AgCl. The linear sweep removed large Cu-rich dendrites from the films, while also causing increases in measured capacitance.
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