Oxygen Vacancies Alter Methanol Oxidation Pathways on NiOOH

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(7), С. 4830 - 4841

Опубликована: Фев. 12, 2024

A thorough comprehension of the mechanism underlying methanol oxidation reaction (MOR) on Ni-based catalysts is critical for future electrocatalytic design and development. However, MOR these materials remains a matter controversy. Herein, we combine in situ surface-enhanced infrared absorption spectroscopy (SEIRAS) density functional theory (DFT) calculations to identify active sites determine monometallic alkaline media. The SEIRAS results show that formate (bi)carbonate are formed after commencement with potential-dependent relative distributions. These spectroscopic good agreement DFT-computed profiles over an oxygen vacancy, suggesting mainly proceeds through formate-involving pathway, which early consumption yields as major product, while increasing potential drives further (bi)carbonate. We also find parallel pathway generation at high potentials bypasses formation formate. two main pathways thermodynamically more feasible than one predominantly reported literature NiOOH involves CHO and/or CO key intermediates. DFT supported by evidence showing no band associated or can be detected SEIRAS, attributed nature vacancies sites, suppressing deep dehydrogenation CH2O CHO. This work thus shows promising role defect engineering promoting activity selectivity.

Язык: Английский

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Ce doped Ni(OH)2/Ni-MOF nanosheets as an efficient oxygen evolution and urea oxidation reactions electrocatalyst

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 58, С. 416 - 425

Опубликована: Янв. 23, 2024

Язык: Английский

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Highly-dispersed 2D NiFeP/CoP heterojunction trifunctional catalyst for efficient electrolysis of water and urea

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 667, С. 543 - 552

Опубликована: Апрель 10, 2024

Язык: Английский

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Tuning Mo cations dissolution and surface reconstruction of CoMoO4 for efficient oxygen evolution reaction

Journal of Alloys and Compounds, Год журнала: 2024, Номер 985, С. 173963 - 173963

Опубликована: Фев. 23, 2024

Язык: Английский

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Binder-free synthesis of nickel-iron-cobalt-oxide electrode for large-scale and durable oxygen evolution reaction

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 88, С. 604 - 616

Опубликована: Сен. 23, 2024

Язык: Английский

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Cr dopant regulating d-orbital electronic configuration of NiFe spinel oxide to improve oxygen evolution reaction in Zn-air battery

Journal of Alloys and Compounds, Год журнала: 2024, Номер 987, С. 174248 - 174248

Опубликована: Март 23, 2024

Язык: Английский

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Enhancing the electrocatalytic performance of vanadium oxide by interface interaction with rGO and NiO nanostructures for electrochemical water oxidation

International Journal of Hydrogen Energy, Год журнала: 2023, Номер 54, С. 1449 - 1460

Опубликована: Дек. 6, 2023

Язык: Английский

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Engineering surface sulfur vacancies of cobalt-doped nickel sulfide arrays induced by Ar plasma treatment to promote oxygen evolution reaction

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 102, С. 1084 - 1092

Опубликована: Янв. 14, 2025

Язык: Английский

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Highly active FeNbO4/NiFeOOH heterojunction induced by coordination activation for efficient and stable industrial water oxidation

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 688, С. 67 - 78

Опубликована: Фев. 15, 2025

Язык: Английский

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Modulation of the Electronic Properties of Co₃O₄ through Bi Octahedral Doping for Enhanced Activity in the Oxygen Evolution Reaction

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 4746 - 4758

Опубликована: Март 6, 2025

Developing a highly active and stable electrocatalyst for the oxygen evolution reaction (OER) is essential efficient hydrogen production through anion exchange membrane water electrolysis powered by renewable electricity. Recently, there has been renewed interest in designing electrocatalysts based on their work function optimization. The insights into materials' electronic properties gained from developing other heterogeneous catalysts, such as those used N2O decomposition, can be thus leveraged to enhance performance of OER electrocatalysts. Knowing that Bi enhances catalytic activity Co3O4 where surface play crucial role, we hypothesized it might also improve electroactivity electroactivity. Therefore, synthesized Bi-doped with different bismuth contents studied sample complementary set physicochemical, electrochemical, computational techniques. We found promoting atomically dispersed its electrocatalytic reducing energy potential-determining step improving electron charge transfer properties. Bismuth atoms enter octahedral sites Co3O4, creating centers enhancing vicinal Co OER. modified are characterized increased binding intermediate state metal–oxygen density states at Fermi level. former reduces overpotential required OER, whereas latter improves kinetics decreasing resistance.

Язык: Английский

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