A microelectrode study of the reduction of formaldehyde in neutral concentrated aqueous solutions

Montenegro, M.I.; Pletcher, Derek; Liolios, E. A.; Mazur, D. J.; Zawodzinski, C.

doi:10.1007/bf01012471

Cited by 21 publications

(4 citation statements)

References 11 publications

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“…However, the current is higher than "no yeast" because of variation in the quenched charge distribution due to redox electrons. In the reverse bias, the formaldehyde reduces to methanol 40 leading to a redox peak at ca. Ϫ3 V. In contrast, the device without the yeast cells shows an IϪV behavior similar to Figure 3a as seen in Figure 6a ("no yeast").…”

Section: Resultsmentioning

confidence: 99%

Self-Assembled Nanoparticle Necklaces Network Showing Single-Electron Switching at Room Temperature and Biogating Current by Living Microorganisms

2009

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A network of one-dimensional (1D) Au nanoparticle necklaces is synthesized and shown to exhibit electronic switching, that is, gating, by the metabolic activity of yeast cells deposited on the structure. Without the cells, the network exhibits the Coulomb blockade effect at room temperature with a sharp threshold voltage, V(T) of approximately 0.45 V, which corresponds to a switching energy of approximately 20 kT. Although the enhancement in V(T) from approximately 70 mV for a single (10 nm) Au particle to >1 V is well-known for a 2D array, the uniqueness of the network topology is the relatively weak dependence of V(T) on temperature that leads to room temperature switching behavior, in contrast to an array where the blockade effect vanishes at ambient temperatures. The coupling between the biochemical process of the cell and the electronics of the network has potential applications for making electrodes for biofuel cells and highly sensitive biosensors using the cell as the specific sensing moiety.

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Section: Resultsmentioning

confidence: 99%

Self-Assembled Nanoparticle Necklaces Network Showing Single-Electron Switching at Room Temperature and Biogating Current by Living Microorganisms

2009

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“…In order to improve the conductivity, two reducing agents of THPC and formaldehyde were selected in this study. The mechanism of these reducing agents in aqueous solutions has been widely studied [49,50]. The use of these agents resulted in faster reduction of gold ions, higher number of absorbed AuNPs and therefore significantly higher conductivity up to 4.44 S m −1 compared to using of chitosan alone.…”

Section: Discussionmentioning

confidence: 99%

Fabrication and evaluation of porous and conductive nanofibrous scaffolds for nerve tissue engineering

Pooshidani

Zoghi

Rajabi

et al. 2021

J Mater Sci: Mater Med

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Peripheral nerve repair is still one of the major clinical challenges which has received a great deal of attention. Nerve tissue engineering is a novel treatment approach that provides a permissive environment for neural cells to overcome the constraints of repair. Conductivity and interconnected porosity are two required characteristics for a scaffold to be effective in nerve regeneration. In this study, we aimed to fabricate a conductive scaffold with controlled porosity using polycaprolactone (PCL) and chitosan (Chit), FDA approved materials for the use in implantable medical devices. A novel method of using tetrakis (hydroxymethyl) phosphonium chloride (THPC) and formaldehyde was applied for in situ synthesis of gold nanoparticles (AuNPs) on the scaffolds. In order to achieve desirable porosity, different percentage of polyethylene oxide (PEO) was used as sacrificial fiber. Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FE-SEM) results demonstrated the complete removing of PEO from the scaffolds after washing and construction of interconnected porosities, respectively. Elemental and electrical analysis revealed the successful synthesis of AuNPs with uniform distribution and small average diameter on the PCL/Chit scaffold. Contact angle measurements showed the effect of porosity on hydrophilic properties of the scaffolds, where the porosity of 75–80% remarkably improved surface hydrophilicity. Finally, the effect of conductive nanofibrous scaffold on Schwann cells morphology and vaibility was investigated using FE-SEM and MTT assay, respectively. The results showed that these conductive scaffolds had no cytotoxic effect and support the spindle-shaped morphology of cells with elongated process which are typical of Schwann cell cultures.

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“…Some works have also successfully utilized renewable light/ electricity energy to obtain C2 + high value-added products in one step via CÀ C coupling. Among the products from the electrochemical conversion of formaldehyde, ethylene glycol (EG) is considered as a common product, [1][2][3][4][5][6] while 1,2-propanediol (1,2-PDO) is generally regarded as a by-product due to its low efficiency. However, the China domestic price of 1,2-PDO is 27610 USD/mt, 57 times and 153 times the price of EG (485 USD/mt) and formaldehyde (180.4 USD/mt), respectively.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 1,2‐Propanediol by Electro‐reduction of Formaldehyde with Oxygen‐enriched Graphene

et al. 2023

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The conversion of electrocatalytic small molecules into high value-added chemicals is a green and sustainable path to reduce energy consumption in traditional industrial production paths. In order to explore the relationship between oxygen function groups in the catalysts and their catalysis behavior, we prepared graphene-based catalysts with different oxygen densities for formaldehyde reduction reaction by adjusting the content of oxygen-containing functional groups on the graphene surface. We found that oxygen-rich graphene (oGO) exhibited the highest activity as well as selectivity for the electroreduction of formaldehyde to 1,2-propanediol (1,2-PDO). Compared with graphite sheets and reduced graphene (rGO), the oGO exhibit the highest 1,2-PDO Faradaic efficiency (FE) of 27.4% with partial current density of 13.7 mA cm À 2 at pH 7. In-situ attenuated total reflection infrared spectroscopy (ATR-IR) confirms that the increased content of oxygen-containing groups on the catalyst surface promotes the adsorption and enrichment of * H 2 CO, which in turn facilitates the coupling reaction to form 1,2-PDO. This work provides a new vision for the catalyst design in the electrochemical conversion reaction from formaldehyde to 1,2-PDO. * H 2 CO coverage on the surface of GO, which is critical to the formation of 1,2-PDO.

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A microelectrode study of the reduction of formaldehyde in neutral concentrated aqueous solutions

Cited by 21 publications

References 11 publications

Self-Assembled Nanoparticle Necklaces Network Showing Single-Electron Switching at Room Temperature and Biogating Current by Living Microorganisms

Self-Assembled Nanoparticle Necklaces Network Showing Single-Electron Switching at Room Temperature and Biogating Current by Living Microorganisms

Fabrication and evaluation of porous and conductive nanofibrous scaffolds for nerve tissue engineering

Synthesis of 1,2‐Propanediol by Electro‐reduction of Formaldehyde with Oxygen‐enriched Graphene

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