The conversion of waste CO2 to value-added chemicals through electrochemical reduction is a promising technology for mitigating climate change while simultaneously providing economic opportunities. use non-aqueous solvents like methanol allows higher availability and novel products. In this work, the electrochemistry in acidic catholyte at Pb working electrode was investigated using separate aqueous anolyte promote sustainable water oxidation half-reaction. selectivity among methyl formate...

Polystyrene (PS) is a widely used thermoplastic polymer, but its very low recycling rate has motivated consideration of chemical conversion strategies to convert waste PS into value-added products. Oxidation methods have been studied, they typically generate benzoic acid, product with relatively market demand. Phenol higher volume that would be an appealing target, no currently exist for the phenol. The repeat unit in closely resembles cumene, primary feedstock produce phenol through Hock...

Structure-activity relationship of surface immobilized electrocatalysts shows overpotential dependence on ligand basicity and steric accessibility.

In this study, we report a pair of electrocatalysts for the hydrogen evolution reaction (HER) based on noninnocent ligand diacetyl-2-(4-methyl-3-thiosemicarbazone)-3-(2-pyridinehydrazone) (H2DMTH, H2L1). The neutral complexes NiL1 and PdL1 were synthesized characterized by spectroscopic electrochemical methods. contain non-coordinating, basic hydrazino nitrogen that is protonated during HER. pKa was determined spectrophotometric titration in acetonitrile to be 12.71 13.03 PdL1. Cyclic...

Electrochemical CO2 reduction from renewable energy is a promising route to mitigate greenhouse gas emissions waste sources while generating value-added products. electroreduction in methanol particularly interesting due the increased solubility compared water and propensity form methyl formate, product absent aqueous electrolysis. Four factors have been identified as critical achieving prolonged high selectivity for formate production on Pb cathode methanol: pH near electrode, low bulk pH,...

Electrochemical reduction of CO2 to valuable chemicals using renewable energy is a promising approach economically incentivizing lower greenhouse gas emissions. electroreduction in ethanol unprecedented despite being sustainable and relatively safe solvent. Here, we demonstrate that electrochemical acidic on Pb Sn cathodes can lead the production ethyl formate, novel three-carbon ester product. Combining formic acid these solvents with an situ acid-catalyzed Fischer esterification reaction...

In this study, a series of thiosemicarbazonato–hydrazinatopyridine metal complexes were evaluated as CO2 capture agents. The incorporate non-coordinating, basic hydrazinatopyridine nitrogen in close proximity to Lewis acidic ion allowing for metal–ligand cooperativity. coordination various ions with (diacetyl-2-(4-methyl-thiosemicarbazone)-3-(2-hydrazinopyridine) (H2L1) yielded ML1 (M = Ni(II), Pd(II)), ML1(CH3OH) Cu(II), Zn(II)), and [ML1(PPh3)2]BF4 Co(III)) complexes. reversibly...

Abstract A series of new bis(thiosemicarbazonato) Cu(II) complexes with pendent polyamines, diacetyl‐(N, ‐dimethylethylenediaminothiosemicarbazonato)‐(N’‐methyl‐3‐thio‐semicarbazonato)butane‐2,3‐diimine)‐copper(II) ( Cu‐1 ), diacetyl‐bis(N‐dimethylethylenediamino‐3‐thiosemicarbazonato)butane‐2,3‐diimine)‐copper(II) Cu‐3 and their cationic derivatives Cu‐2 Cu‐4 , have been synthesized fully characterized by spectroscopic, electrochemical, X‐ray diffraction methods. Complexes – are analogues...

Despite the promise of electrochemical carbon dioxide reduction as a technology for production clean fuels and decarbonization chemical industry, research has mostly focused on aqueous systems with relatively limited set products that have been achieved via electrosynthesis. Increasingly, CO2 electroreduction in nonaqueous solvents is being pursued to develop new avenues expanding suite can be made high selectivity. alcohols coupled situ esterification produce esters one such route utilizes...

Homogeneous molecular electrocatalysts have shown promise as a highly tailorable platform for designing active sites with high selectivity target products. However, many such catalysts face durability issues under applied potential, which can cause reductive or oxidative decomposition of the molecule. The resulting deposition metal center and possible ligand fragments on electrode surface heterogeneous catalyst convolutes measured electrochemical activity, leading to uncertainty regarding...

Abstract Recently, tandem cathodic reactions have been demonstrated in non‐aqueous solvents to couple CO 2 reduction a secondary reaction create novel species that are not produced aqueous electrolysis. One can be performed with high selectivity and durability is the electrochemical conversion of formic acid in‐situ esterification methanol produce methyl formate. However, translation high‐performance flow electrolyzer far from trivial, as catholyte leads reactor challenges including flooding...

Pencil substrates are promising ideal durable carbon support also amenable for post characterization evaluation of hydrogen evolution reaction catalysts.

Linkage isomers are coordination compounds with the same composition but different donor atoms, resulting in distinct physical and electronic structures. A pair of linkage isomers, CuL555 CuL465, derived from phenylglyoxal bis(ethylthiocarbamate) were synthesized, isolated, characterized by structural, electrochemical, spectroscopic methods. The stable solution under ambient conditions, CuL465 converts to acid, consistent quantum-chemical calculations. complexes screened against a lung...

Reactions of indigo with quinones in the presence sodium hydride leads unexpectedly to products containing two subunits; one is featured a cis configuration and fused via its indole nitrogen atoms second at central C-C bond latter. Structural, optical, redox properties new compounds are reported.

A series of hybrid thiosemicarbazone-alkylthiocarbamate copper complexes with similar electronic environments but distinct physical structures have been prepared, characterized, and evaluated for antiproliferation activity. The include the constitutional isomers (1-phenylpropane-1-imine-(O-ethylthiocarbamato)-2-one-(N-methylthiosemicarbazonato))copper(II) (CuL1) (1-phenylpropane-1-one-(N-methylthiosemicarbazonato)-2-imine-(O-ethylthiocarbamato))copper(II) (CuL2) along...

A series of isomeric bis(alkylthiocarbamate) copper complexes have been synthesized, characterized, and evaluated for antiproliferation activity. The were derived from ligand isomers with 3-methylpentyl (H

Electrochemical conversion of CO 2 has been very promising in neutralizing existing carbon the atmosphere as well creating a pathway to produce various fuels and chemicals. The use flow electrolyzer makes it possible achieve high faradaic efficiencies at current densities from pure or dilute flue gas feeds. solubility methanol is higher than aqueous solutions with acidic solvent, generate unique product, methyl formate. This work describes mixed propylene carbonate/methanol solvent for...