Electrosynthesis of Benzyl-tert-butylamine via Nickel-Catalyzed Oxidation of Benzyl Alcohol

Green Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This article describes a strategy to perform linear paired electrolysis converting benzylalcohol into benzylamine.

Language: Английский

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Nickel(ii)-hydrazineylpyridine catalyzed regioselective synthesis of α-benzyl substituted β-hydroxy ketones via a Fenton free radical reaction

Organic & Biomolecular Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Ni-PyH-catalyzed regioselective synthesis of α-benzyl substituted β-hydroxy ketones is reported via a Fenton free-radical reaction. Protocol enables facile access to products in good excellent yields toluene at room temperature 100 °C.

Language: Английский

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Chemical upcycling of Ni from electroplating wastewater to well-defined catalyst for electrooxidation of glycerol to formate

Dalton Transactions, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This work offers a potential pathway to upcycle Ni-containing wastewater into valuable electrocatalyst.

Language: Английский

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Unraveling Side Reactions in Paired CO₂ Electrolysis at Operando Conditions: A Case Study of Ethylene Glycol Oxidation

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Replacing the oxygen evolution reaction (OER) in CO2 electrolysis with an energetically and economically favorable alternative is very promising. Yet, understanding paired organic oxidation environment for reduction particularly challenging, as monitoring multiple side reactions problematic. Herein, we examined of ethylene glycol (EG), one simplest polyols, a model on series nickel oxyhydroxide catalysts (β-NiMxOOH, M = Ni, Co, Fe, Cu). Using situ techniques, including surface-enhanced infrared absorption spectroscopy (SEIRAS) differential electrochemical mass spectrometry (DEMS), together various ex approaches, obtained potential-resolved quantitative information comprising OER, overoxidation to CO/CO2, catalyst dissolution, from electrolyte decarbonation. Many factors impurity cations, pH, potential can substantially influence product distribution reactions. Such influences are nearly identical both electrocatalytic chemical-electrochemical pathways. The optimized system achieve stable high Faradaic efficiencies formate (∼100%), glycolaldehyde (∼86%), glycolate (∼66%), respectively. Importantly, easily suffer higher energy consumption than conventional counterpart, provided unregulated. Yet modulated consumed 21.1% less even when separation was considered. This work reveals unique electrolysis, opening up opportunities designing efficient systems real-life applications.

Language: Английский

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Electrocatalytic Oxidation of Primary Alcohols at the Triple-Phase Boundary in an Anion-Exchange Membrane Reactor with Nickel, Cobalt, and Iron Catalysts

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(11), P. 8922 - 8929

Published: May 27, 2024

Transition metals, such as nickel (Ni), cobalt (Co), and iron (Fe), exhibit catalytic activity for electrochemical oxidation under basic conditions. In this study, we demonstrate the highly selective of primary alcohols to aldehydes using Ni, Co, Fe catalysts in an anion-exchange membrane (AEM) reactor. Our findings indicate that non-noble metal can be utilized electrocatalytic by leveraging conditions do not corrode these metals. addition, prepared binary alloys oxide investigated their abilities alcohol oxidation. The results controlling oxygen evolution reaction potential through composition ratio catalyst avoiding interference with desired are crucial increasing yield products. Furthermore, despite nature sites, selectively yielded corresponding aldehydes, which was attributed unique triple-phase interfacial sites AEM

Language: Английский

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Delineating Catalyst Deactivation Mechanisms in Electrocatalytic Glycerol Oxidation toward Biodiesel Wastewater/CO₂ Co-valorization

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Biodiesel plays a key role in achieving economy-wide decarbonization but its production discharges significant amounts of CO2 and glycerol-laden wastewater. Given the increasing abundance biodiesel wastewater low redox potential glycerol, coupling glycerol oxidation reaction (GOR) with electrolysis has emerged as an attractive strategy to achieve sustainable management, utilization, green chemical synthesis single unit process. Despite need for highly stable catalysts, few studies have examined electrocatalyst deactivation environmental waste streams. Here, we present first-of-a-kind diagnostic study that investigates nickel (Ni) catalyst stability during GOR synthetic wastewaters. A current decline 99.7% was observed within 24 h operation. This coincided 80% decrease surface active Ni(II)/Ni(III) concentrations, 190-fold increases interfacial impedance, appearance electrode C-bonds suggested coverage by reactants intermediates likely main contributor loss catalytic activity. Analyses more complex electrolytes containing methanol oleate emergence distinct mechanisms through restricted NiOOH formation. Altogether, this details several previously unreported mechanisms. These findings can ultimately help inform future design toward practical valorization.

Language: Английский

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Electrodeposition of nickel oxyhydroxide nanoparticles on 2D MXene nanosheets: An efficient substrate for electrocatalytic oxidation of urea

Heliyon, Journal Year: 2025, Volume and Issue: 11(6), P. e43103 - e43103

Published: March 1, 2025

Language: Английский

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NiS2@NiOOH/CNT hybrid as robust catalyst for oxygen evolution reaction

Journal of Electroanalytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 119159 - 119159

Published: April 1, 2025

Language: Английский

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Hydrogen Atom Binding Energy of Structurally Well-Defined Cerium Oxide Nodes at the Metal–Organic Framework–Liquid Interfaces

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(23), P. 9556 - 9565

Published: June 1, 2024

Redox-active metal oxides are prevalent in the fields of thermal, photo-, and electrocatalysis. Thermodynamics proton-coupled electron transfer (PCET) reactions at their surfaces critical, as they scale with activity a catalyst. The free energy H atom binding on catalyst surface is employed catalytic descriptor for H2, O2, many others. structural heterogeneity ambiguity sites have largely precluded understanding exact redox-active sites, challenging chemists to design structure down atomic level. Here, we report electrochemically determined stoichiometry thermodynamics PCET cerium-based metal–organic framework (MOF), Ce-MOF-808. Cyclic voltammograms (CVs) MOF-deposited electrodes aqueous buffers various pHs revealed Faradaic couple that can be ascribed Ce4+/3+ redox. Plotting half-wave potential (E1/2) against electrolyte pH resulted Pourbaix diagram slope 65 ± 9 mV/pH, suggesting 1H+/1e– stoichiometry. Using thermochemical analogy between one (H•), hexanuclear Ce6 node, Ce3+O–H bond dissociation (BDFE), was calculated 78 2 kcal mol–1. In-silico calculations quantitatively corroborated our BDFE measurements. Furthermore, multiple proton topologies were computationally elucidated exhibit BDFEs similar experimental values, agreeing wide features all CVs, implicating system has substantial distribution. To best understanding, this first measurement MOF-liquid interface. Implications presented measurements catalysis using MOFs discussed.

Language: Английский

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Suppressing carbon corrosion via mechanically mixing transition metal phosphide clusters: a comparative in situ study in alkaline media

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(32), P. 17237 - 17245

Published: Jan. 1, 2023

Using differential electrochemical mass spectrometry (DEMS), carbon oxidation monitoring in alkaline media with sensitive detection of CO 2 is enabled and a simple strategy to suppress corrosion offered.

Language: Английский

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