Noble metal sensitized invasive porous bioelectrodes: advanced medical device for enhanced neuronal activity and chronic alcohol treatment

Kim, Hong Soo; Choi, Hansaem; Flores, Monica Claire; Razzaq, Abdul; Gwak, Young Seob; Ahn, DanBi; Kim, Mi Seon; Gurel, Ogan; Lee, Bong Hyo; In, Su‐Il

doi:10.1039/d0ra07922g

Cited by 2 publications

(4 citation statements)

References 64 publications

(54 reference statements)

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“…The PE, which was fabricated through electrochemical anodization, clearly shows the hierarchical micro/nano-scale pores on the surface of the electrode (Figure 2a,b), which is the same as previously reported [29][30][31][32][33]. In addition, due to the large surface area of the PE, it has low electrochemical impedance and R ct , as shown in Figure 3, which can cause high adsorption and electrochemical reaction with reactants on the electrode surface.…”

Section: Discussion Of Resultssupporting

confidence: 83%

“…Therefore, various strategies have been reported to enhance the properties of stainless steel-based anode for OER, for example, sulfurization treatment [26], cathodization treatment [27] of stainless steel foil and stainless steel fiber felt [28]. Our previous study also fabricated a novel porous electrode (PE) with a large surface area and low electrochemical resistance via the electrochemical anodization technique [29][30][31][32][33]. The anodization process has the advantage of being simple and easy to manufacture compared to other earlier reported technologies [34,35], which improves the electrochemical properties of stainless steel-based electrodes and is also suitable for mass production.…”

Section: Introductionmentioning

confidence: 99%

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Surface Modification of Electrocatalyst for Optimal Adsorption of Reactants in Oxygen Evolution Reaction

Kim

Flores

et al. 2021

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Technological development after the industrial revolution has improved the quality of human life, but global energy consumption continues to increase due to population growth and the development of fossil fuels. Therefore, numerous studies have been conducted to develop sustainable long-term and renewable alternative energy sources. The anodic electrode, which is one of the two-electrode system components, is an essential element for effective energy production. In general, precious metal-based electrocatalysts show high OER reactions from the anodic electrode, but it is difficult to scale up due to their low abundance and high cost. To overcome these problems, transition metal-based anodic electrodes, which exhibit advantages with respect to their low cost and high catalytic activities, are in the spotlight nowadays. Among them, stainless steel is a material with a high ratio of transition metal components, i.e., Fe, Ni, and Cr, and has excellent corrosion resistance and low cost. However, stainless steel shows low electrochemical performance due to its slow sluggish kinetics and lack of active sites. In this study, we fabricated surface modified electrodes by two methods: (i) anodization and (ii) hydrogen peroxide (H2O2) immersion treatments. As a result of comparing the two methods, the change of the electrode surface and the electrochemical properties were not confirmed in the H2O2 immersion method. On the other hand, the porous electrode (PE) fabricated through electrochemical anodization shows a low charge transfer resistance (Rct) and high OER activity due to its large surface area compared to the conventional electrode (CE). These results confirm that the synthesis process of H2O2 immersion is an unsuitable method for surface modification. In contrast, the PE fabricated by anodization can increase the OER activity by providing high adsorption of reactants through surface modification.

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Section: Discussion Of Resultssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Surface Modification of Electrocatalyst for Optimal Adsorption of Reactants in Oxygen Evolution Reaction

Kim

Flores

et al. 2021

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“…Moreover, as a noble metal element that is white in appearance with a glossy, soft and stretchy texture, silver has unusual optical, chemical, electrical and thermal properties [24]. Recently, the antimicrobial properties of silver nanoparticles have been identified and used in medical technology research applications [25][26][27].…”

Section: Ofmentioning

confidence: 99%

“…The electrolyte used for the electrodeposition process consisted of 0.02 wt.% AgNO 3 (99.0%, American Chemical Society (ACS) reagent, Sigma-Aldrich, St. Louis, MO, USA) and 2.0 vol.% DI water in ethylene glycol (Extra Pure, Daejung, Siheung-si, Korea). The optimal electrodeposition time used for this process is 75 s, based on the previous study [27]. After electrodeposition, the Ag-CEs were thoroughly washed with hot DI water (70 • C) to remove any loosely attached nanoparticles and dried under nitrogen gas stream.…”

Section: Preparation Of Silver Nanoparticle-coated Conventional Electrodes (Ag-ce)mentioning

confidence: 99%

Stable Surface Technology for HER Electrodes

Kim

Flores

et al. 2021

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With the rapid increase in energy consumption worldwide, the development of renewable and alternative energy sources can sustain long-term development in the energy field. Hydrogen (H2), which is one of the clean chemical fuels, has the highest weight energy density and its combustion byproduct is only water. Among the various methods of producing hydrogen source, water electrolysis is a process that can effectively produce H2. However, it is difficult for commercialization of water electrolysis for H2 production due to the high cost and low abundance of noble metal-based cathodic electrode used for highly efficiency. Several studies have been conducted to reduce noble metal loading and/or completely replace them with other materials to overcome these obstacles. Among them, stainless steel contains many components of transition metals (Ni, Cr, Co) but have sluggish reaction kinetics and small active surface area. In this study, the problem of stainless steel was to be solved by utilizing the electrocatalytic properties of silver nanoparticles on the electrode surface, and electrodes were easily fabricated through the electrodeposition process. In addition, the surface shape, elemental properties, and HER activity of the electrode was analyzed by comparing it with the commercialized silver nanoparticle-coated invasive electrodes from Inanos (Inano-Ag-IE) through the plasma coating process. As a result, silver nanoparticle-coated conventional electrode (Ag-CE) fabricated through electrodeposition confirmed high HER activity and stability. However, the Inano-Ag-IE showed low HER activity as silver nanoparticles were not found. We encourage further research on the production process of such products for sustainable energy applications.

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Noble metal sensitized invasive porous bioelectrodes: advanced medical device for enhanced neuronal activity and chronic alcohol treatment

Abstract: Novel metal sensitized invasive porous bioelectrodes (x-IPB, x = Ag, Au, Pt) have high surface area and enhanced electrochemical properties, resulting in increased neural activity and alcohol detoxification.

Cited by 2 publications

References 64 publications

Surface Modification of Electrocatalyst for Optimal Adsorption of Reactants in Oxygen Evolution Reaction

Surface Modification of Electrocatalyst for Optimal Adsorption of Reactants in Oxygen Evolution Reaction

Stable Surface Technology for HER Electrodes

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