Electrochemical Glycerol Oxidation on Rhodium Surface: Mechanistic Insights and Catalytic Activity in Alkaline Medium

ACS Catalysis, Journal Year: 2025, Volume and Issue: 15(3), P. 2200 - 2211

Published: Jan. 23, 2025

This study explores the electrochemical properties of rhodium polycrystalline electrodes applied to glycerol oxidation reaction (GOR) in an alkaline medium. Our findings demonstrate that (Rh) surfaces exhibit catalytic activity by facilitating C–C bond cleavage at low potentials. Employing situ Fourier-transform infrared (FTIR) spectroscopy, it was possible identify carboxylates and carbon monoxide bridge configuration (COB) as primary intermediates GOR. At lower potentials, predominantly yields COB, which oxidizes CO2. Carboxylate compounds, such tartronate oxalate, emerge main products, highlighting intricate mechanisms facilitated Rh surfaces. Additionally, oscillatory pattern GOR process observed, whose frequency increases with concentration, indicating a strong correlation between behavior, once COB already formed potential is cause for sustaining process. Therefore, insights gained from this enhance our understanding on contribute development advanced electrocatalysts biomass-derived fuel conversion, applications electrolyzers cells.

Language: Английский

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TACKLING ELECTROCATALYTIC OXIDATION OF GLYCEROL TO DIHYDROXYACETONE: A COMPREHENSIVE REVIEW

Current Opinion in Electrochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 101665 - 101665

Published: Feb. 1, 2025

Language: Английский

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Synergistic Zinc Molybdate-Carbon Nanosphere Nanocomposites for Enhanced Electrochemical Performance and Efficient Photocatalytic Applications

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179731 - 179731

Published: March 1, 2025

Language: Английский

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The Role of Cu³⁺ in the Oxygen Evolution Activity of Copper Oxides

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: 147(19), P. 16070 - 16083

Published: May 1, 2025

Cu-based oxides and hydroxides represent an important class of materials from a catalytic corrosion perspective. In this study, we investigate the formation bulk surface Cu3+ species that are stable under water oxidation catalysis in alkaline media. So far, no direct evidence existed for presence (CuOOH) or oxides, which were primarily proposed by theory. This work directly places CuOOH oxygen evolution reaction (OER) Pourbaix stability region with calculated free energy -208.68 kJ/mol, necessitating revision known Cu-H2O phase diagrams. We also predict active sites OER consistent bridge O* site between two atoms onset at ≥1.6 V vs reversible hydrogen electrode (RHE), aligning experimentally observed Cu2+/3+ waves cyclic voltammetry Fe-free Fe-spiked copper Trace amounts Fe (2 μg/mL (ppm) to 5 μg/mL) solution measurably enhance activity OER, likely due adsorption serve as . Importantly, modulation excitation X-ray absorption spectroscopy (ME-XAS) Cu thin-film shows distinct fingerprint conditions 1.8 RHE. Additionally, situ Raman polycrystalline 0.1 mol/L (M) KOH revealed features those addition CuO. Overall, provides electrochemical expands our longstanding understanding mechanism copper.

Language: Английский

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Adsorption configuration control on Pt-Bi2O3 for the oriented conversion of glycerol to glyceric acid via terminal hydroxyl oxidation

Science Bulletin, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Language: Английский

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