Topics

Online monitoring of electrochemical carbon corrosion in alkaline electrolytes by differential electrochemical mass spectrometry.

07:00 EST 8th November 2019 | BioPortfolio

Summary of "Online monitoring of electrochemical carbon corrosion in alkaline electrolytes by differential electrochemical mass spectrometry."

Carbon materials find ubiquitous use as electrodes, cata-lysts or catalyst supports in a myriad of electrochemical applications. However, carbon corrosion at high anodic potentials is known to be a major source of instability especially in acidic electrolytes and impairs long-term functionality of electrodes. Changing reaction kinetics with changing pH values of the electrolyte require in-depth investigation of carbon corrosion also for alkaline environments. Evidently, the imme-diate conversion of CO 2 to CO 3 2- prevents straight-forward investiga-tion of carbon corrosion by means of differential electrochemical mass spectrometry (DEMS) in alkaline media. We report adaptation of a DEMS system to allow online CO 2 detection as the product of carbon corrosion in alkaline electrolytes. A new cell design allows for in-situ acidification of the electrolyte to release initially dissolved CO 3 2- as CO 2 in front of the DEMS membrane and its subsequent detection by mass spectrometry. DEMS studies of a carbon-supported nickel boride (Ni x B/C) catalyst and pure Vulcan XC 72 at high anodic poten-tials suggest a protection of carbon by the presence of highly-active oxygen evolution electrocatalysts. Most importantly, carbon corrosion is substantially decreased in alk-line solution which may provide new aspects for the application of carbon materials in electrolysers or fuel cells.

Affiliation

Journal Details

This article was published in the following journal.

Name: Angewandte Chemie (International ed. in English)
ISSN: 1521-3773
Pages:

Links

DeepDyve research library

PubMed Articles [13303 Associated PubMed Articles listed on BioPortfolio]

Corrosion of Q235 Carbon Steel in Seawater Containing and sp.

Iron-oxidizing bacteria (IOB) and iron-reducing bacteria (IRB) can easily adhere onto carbon steel surface to form biofilm and affect corrosion processes. However, the mechanism of mixed consortium in...

Anti-corrosion of amphoteric metal enhanced by MAO/corrosion inhibitor composite in acid, alkaline and salt solutions.

An anticorrosive composite coating with enhanced corrosion resistance in acid, alkaline and salt solutions was fabricated by compounding micro- and nanoporous inorganic structure and organic corrosion...

Ab Initio Cyclic Voltammetry onCu(111), Cu(100) and Cu(110) in Acidic, Neutral and Alkaline Solutions.

Electrochemical reactions depend on the electrochemical interface between the electrode surfaces and the electrolytes. To control and advance electrochemical reactions there is a need to develop reali...

Corrosion of carbon steel and the passivating properties of corrosion films formed under high-PT geothermal conditions.

Corrosion is a major obstacle to a safe implementation of geotechnical applications. Using a novel approach that includes vertical scanning interferometry (VSI) and electrochemical impedance spectrosc...

A high-efficiency corrosion inhibitor of N-doped citric acid-based carbon dots for mild steel in hydrochloric acid environment.

Novel N-doped carbon dots (CDs) were obtained through pyrolysis of ammonium citrate at 180 °C for 1, 2 and 3 h, and their corrosion inhibition effect on Q235 steel in 1 M HCl solution were evaluated ...

Clinical Trials [4935 Associated Clinical Trials listed on BioPortfolio]

Alkaline Phosphatase Level in Pregnancy and Its Association With Birth Weight

Alkaline phosphatase is known to be produced by syncytiotrophoblasts in the placenta and its levels are normally increased in pregnancy. Therefore, it would be reasonable to hypothesize th...

Effect of Patient Position on Arterial, End-tidal and Transcutaneous Carbon Dioxide

Investigators evaluate the effect of patient position (Trendelenburg and reverse Trendelenburg) on arterial, end-tidal and transcutaneous carbon dioxide partial pressure in patients underg...

Electrochemical Skin Conductance in Evaluation of Chronic Neuropathy électrochimique cutanée

Use of cutaneous electrochemical conductance for preclinical screening of small-caliber nerve fibers

Search Elevated Serum Alkaline Phosphatase as a Marker of Prenatal Intervillositis Chronic Histiocytic

Background : Chronic histiocytic intervillositis is a rare placental disease linked with poor perinatal outcome. In a recent study, a major antenatal increased alkaline phosphatase was sus...

Carbon Monoxide Measurement to Screen for Sickle Cell Disease

Modify the design of the CoSense device (Model C20112, currently cleared by the FDA for ETCO (end-tidal carbon monoxide) monitoring to improve accuracy and consistency under temperature co...

Medical and Biotech [MESH] Definitions

An electrochemical technique for measuring the current that flows in solution as a function of an applied voltage. The observed polarographic wave, resulting from the electrochemical response, depends on the way voltage is applied (linear sweep or differential pulse) and the type of electrode used. Usually a mercury drop electrode is used.

A scanning probe microscopy technique that uses an ultramicroelectrode as the scanning probe that simultaneously records changes in electrochemical potential as it scans thereby creating topographical images with localized electrochemical information.

Substances that dissociate into two or more ions, to some extent, in water. Solutions of electrolytes thus conduct an electric current and can be decomposed by it (ELECTROLYSIS). (Grant & Hackh's Chemical Dictionary, 5th ed)

A slightly alkaline secretion of the endocervical glands. The consistency and amount are dependent on the physiological hormone changes in the menstrual cycle. It contains the glycoprotein mucin, amino acids, sugar, enzymes, and electrolytes, with a water content up to 90%. The mucus is a useful protection against the ascent of bacteria and sperm into the uterus. (From Dictionary of Obstetrics and Gynecology, 1988)

Physiologic or biochemical monitoring of the fetus. It is usually done during LABOR, OBSTETRIC and may be performed in conjunction with the monitoring of uterine activity. It may also be performed prenatally as when the mother is undergoing surgery.

Quick Search


DeepDyve research library

Searches Linking to this Article