Topic
Redox
About: Redox is a research topic. Over the lifetime, 26853 publications have been published within this topic receiving 862368 citations. The topic is also known as: reduction-oxidation & reduction-oxidation reaction.
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TL;DR: At the center of zinc/redox signaling are the zinc/thiolate clusters of metallothionein, which can transduce zinc and redox signals and thereby attenuate or amplify these signals.
231 citations
TL;DR: In this paper, the electrochemical oxidation of dopamine, 4-methylcatechol, dihydroxyphenylacetic acid and hydroquinone was examined on several native and modified glassy carbon (GC) surfaces.
Abstract: The electrochemical oxidation of dopamine, 4-methylcatechol, dihydroxyphenylacetic acid, dihydroxyphenyl ethylene glycol, and hydroquinone was examined on several native and modified glassy carbon (GC) surfaces Treatment of polished GC with pyridine yielded small ΔEp values for cyclic voltammetry of all systems studied, implying fast electron-transfer kinetics Changes in surface oxide coverage had little effect on kinetics, nor did the charge of the catechol species or the solution pH Small ΔEp values correlated with catechol adsorption, and surface pretreatments that decreased adsorption also increased ΔEp Electron transfer from catechols was profoundly inhibited by a monolayer of nitrophenyl or (trifluoromethyl)phenyl (TFMP) groups on the GC surface, so that voltammetric waves were not observed The ΔEp increased monotonically with surface coverage of TFMP groups The results indicate that catechol adsorption to GC is required for fast electron transfer for the redox systems studied Unlike Ru(NH3)6
231 citations
TL;DR: In this paper, the authors compared the activity and selectivity of copper and platinum monometallic catalysts compared to those of their bimetallic counterparts and found that copper has a negative influence on the selectivity toward nitrogen.
230 citations
TL;DR: In this article, the redox chemistry of Cu in zeolite ZSM-5 has been studied using FTIR, TPR, EPR, and EXAFS.
Abstract: Motivated by the unique catalytic activity of Cu/ZSM-5 in the decomposition of NO to N2 + O2, the redox chemistry of Cu in zeolite ZSM-5 has been studied using FTIR, TPR, EPR, and EXAFS. Isolated ions, Cu2+, oxocations, [Cu−O−Cu]2+, and oxide particles have been identified. Their relative abundances depend on the overall Cu loading, the pH during ion exchange, and the gas atmosphere. Oxocations are only detected at Cu exchange levels exceeding 40%; their concentration is higher in high-pH preparations favoring hydrolysis. Oxocations are reduced by CO and NO at room temperature; they act as catalytic sites for the disproportionation of NO into N2O + NO2. CuO particles are detected in all samples; at elevated temperature they decompose in He to Cu2O. In FTIR Cu+ is detected using CO or NO as a probe. Flowing H2 reduces Cu2+ ions; the first detectable product is Cu+ because Cu0 is thermodynamically unstable in the presence of Cu2+. After all Cu2+ is used up Cu0 is detected. In CO only oxide particles and oxo...
230 citations
TL;DR: A new reversible fluorescence probe MPhSe-BOD for the redox cycle process between hypochlorous acid and hydrogen sulfide in solution and in living cells has good cell membrane permeability, and can monitor intracellular HClO/H(2)S redox cycles continuously.
230 citations