modifying graphite felt cathode by hno3 or koh to

Selective H2O2 electrosynthesis by O

2021/4/15Wang et al. observed that the decreased H 2 O 2 yield was accompanied by decreased –COOH content on the graphite felt cathode . In our previous study, we also demonstrated that the content of carboxyl groups on graphite felt was positively correlated with the H 2 O 2 yield, and an extended operation time resulted in a lower content of carboxyl groups and a lower H 2 O 2 yield [42] .

Mass and Charge Transfer Enhanced Electrode for High

Methods of exfoliating a graphite felt include applying a voltage differential to the graphite felt in an aqueous solution. Typically, the voltage differential is from about 5 V to about 20 V, preferably from about 10 V to about 15 V, and is applied for a duration from about 15 seconds to about 10 minutes, preferably from about 30 seconds to about 2 minutes.

Current Projects

Electrochemical Lithium Production from LiCl/LiBr Just tinkering with this idea for now. As with all of my projects I have no use for the things I create other then to down the road create other things I have no use for. Still though I have found enough information in my sodium quest to make Li seem like an easy target, thus, I might take a shot at it. I might try a non-aqueous solvent or I

MultiComp

Graphene oxide was ultra-sonicated, boiled in HNO3, ultra-centrifuged, and finally filtrated, reaching a mean flake size of ~30 nm with quantum dot properties. Flake size distributions were obtained from scanning electron microscopy (SEM) images after consecutive preparation steps.

Workfunction

Graphene is a promising candidate to complement brittle and expensive transparent conducting oxides. Nevertheless, previous research efforts have paid little attention to reduced graphene, which can be of great benefit due to low-cost solution processing without substrate transfer. Here we demonstrate workfunction-tunable, highly conductive, N-doped reduced graphene film, which is obtainable

Development of a continuous reactor for the electro

A laboratory bench-scale continuous reactor has been developed for the electro-reduction of CO₂ to formate salts in aqueous solution. This novel reactor operated in the trickle-bed mode with co-current flow of reactant gas and catholyte liquid through a flow-by 3-D cathode, to overcome the twin problems of reactant supply and mass transfer limitation encountered in previous work on the

Effects of Activated Carbon Surface Chemistry

Effect of modification with HNO3 and NaOH on metal adsorption by pitch based activated carbon fibers. Carbon 2001; 39(11): 1635 1642. [49] Biniak S, Pakula M, Szymanski GS, Swiatkowski A. Effect of activated carbon surface oxygen and/or nitrogen containing groups on adsorption of copper(II) ions from aqueous solution.

High yield of hydrogen peroxide on modified graphite felt

2019/12/1The unmodified graphite felt cathode has a very low H 2 O 2 production. For example, under the aeration conditions (0.14, 0.1 L min −1 ), the production of H 2 O 2 were only 0.11 and 0.62 mg h −1 cm −2 at 132, 161 A m −2 for 5 and 3 h ( Zarei et al., 2009 ; zcan et al., 2008 ), respectively.

Development of a continuous reactor for the electro

A laboratory bench-scale continuous reactor has been developed for the electro-reduction of CO₂ to formate salts in aqueous solution. This novel reactor operated in the trickle-bed mode with co-current flow of reactant gas and catholyte liquid through a flow-by 3-D cathode, to overcome the twin problems of reactant supply and mass transfer limitation encountered in previous work on the

Oxygen reduction reaction catalysts used in microbial

Oxygen reduction reaction catalysts used in microbial fuel cells for energy-efficient wastewater treatment: a review Heyang Yuan a, Yang Hou * b, Ibrahim M. Abu-Reesh c, Junhong Chen * d and Zhen He * a a Department of Civil and Environmental Engineering, ia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.

Journal of The Electrochemical Society, Volume 162,

Nitrogen-doped graphite felt was synthesized by the controlled deposition of a thin layer of polydopamine on the surface of graphite felt followed by pyrolysis in an Ar atmosphere. Taking advantage of the versatile capabilities of the coating, as well as its high nitrogen content, dopamine was demonstrated to be an effective precursor for the preparation of nitrogen-doped graphite.

Influence of activation conditions on the physicochemical

2020/7/14The biochar produced from agricultural crop residues through thermochemical processes helps in crop waste management. Biochar has paid more attention due to its distinctive features such as high organic carbon content, stable structure, large surface area, and cation exchange capacity. The biochar obtained from crop residues can be readily converted into activated biochar. This review paper

Test for Topics Chemistry Form 3

Potassium hydroxide has a purity of 85.9%, find the mass required to prepare 1 litre of 0.25M solution given that, mass of KOH is 56.11g/mol? Find volume of HCl which is 37.1% pure and has a density of 1.2g/cm3 needed to prepare 1liter of 0.2M HCl, iven that mass of HCL is 36.5g/mol.

Current Projects

Electrochemical Lithium Production from LiCl/LiBr Just tinkering with this idea for now. As with all of my projects I have no use for the things I create other then to down the road create other things I have no use for. Still though I have found enough information in my sodium quest to make Li seem like an easy target, thus, I might take a shot at it. I might try a non-aqueous solvent or I

Current Projects

Electrochemical Lithium Production from LiCl/LiBr Just tinkering with this idea for now. As with all of my projects I have no use for the things I create other then to down the road create other things I have no use for. Still though I have found enough information in my sodium quest to make Li seem like an easy target, thus, I might take a shot at it. I might try a non-aqueous solvent or I

Modification of carbon felt anodes using double

Carbon felt is widely used as an anode material in microbial fuel cells (MFCs) because of its high specific surface area, low cost, good electrical conductivity, and biocompatibility. In this paper, carbon felt samples were thermally treated with a mixed solution of

Enhanced O2− and HO via in situ generating H2O2 at

2020/11/1Preparation and characterization of a novel KOH activated graphite felt cathode for the electro-Fenton process Appl. Catal., B: Environ., 165 ( 2015 ), pp. 360 - 368 Article Download PDF View Record in Scopus Google Scholar

Hybrid PEM fuel cell : redox cathode approach

The proton exchange membrane fuel cell (PEMFC) is considered to be a promising power device with a broad range of applications. However, there are still a number of challenges especially concerning performance, cost, and reliability of these systems. The redox flow battery utilizes fundamentally simpler chemistry, but has limitations in terms of membranes/materials used in system construction

MultiComp

Graphene oxide was ultra-sonicated, boiled in HNO3, ultra-centrifuged, and finally filtrated, reaching a mean flake size of ~30 nm with quantum dot properties. Flake size distributions were obtained from scanning electron microscopy (SEM) images after consecutive preparation steps.

ECS Transactions, Volume 3, Number 1, October 2006,

The current densities from the DEFC equipped with a 10% PtCo/C cathode were similar to those obtained when a 20% PtCr/C cathode was used. However, an improved performance in terms of mass specific current density was shown by the PtCo-based cathode in the DEFC.

Importance of Graphene in the Electro

Graphite felt modified with N-doped graphene was used as a cathode for the electro-Fenton process. (20) The selectivity of the two-electron pathway was improved due to the increased mass transfer and oxygen diffusion, which prevent the further conversion of H 2 O 2 to water.

Insights into Practical

Hydrogen peroxide (H2O2) is a valuable chemical with a wide range of applications. A recent trend in H2O2 production focuses on electrochemical reduction of oxygen, which represents an environmentally friendly method for on-site H2O2 generation. To realize highly efficient practical-scale electrosynthesis of H2O2, catalytic materials design and electrochemical reactor engineering play equally

Multifunctional roles of carbon‐based hosts for Li‐metal

After intercalation into the graphite anode up to 372 mAh/g, the Li‐ion will be deposited on graphite particles out of the interlayer in the form of Li metal. When Li metal is electroplated onto natural graphite consisting of 2D flakes, it nucleates at the outer edge of the flakes and grows into dendrites directly towards the outside, as shown in Figure 9A .

new carbon materials as catalyst supports_

Much work has been done on developing new carbon materials and modifying the carbon materials by pretreatment with acid, alkali, oxidant, or polymer to meet these requirements. In this work, commercial carbon supports that include the widely used carbon black Vulcan XC-72R, acetylene black, black pearls 2000, Printex XE-2, and Ketjen Black EC were briefly reviewed.

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