3D‐Printed Hierarchical Nanostructured N‐Co₂NiO₄ NF Electrode for Efficient Concurrent Electrocatalytic Production of Hydrogen and Formate

Small, Год журнала: 2024, Номер unknown

Опубликована: Дек. 9, 2024

Abstract Replacing the oxygen evolution reaction with alternative glycerol electro‐oxidation (GER) provides a promising strategy to enhance efficiency of hydrogen production via water electrolysis while co‐generating high‐value chemicals. However, obtaining low‐cost and efficient GER electrocatalysts remains big challenge. Herein, self‐supported N‐doped Co 2 NiO 4 nanoflakes (N‐Co NF) is proposed for electrocatalytic oxidation formate. The synergistic effect induced by interaction layered nanostructures on 3D‐printed Nickel‐Yttria‐stabilized zirconia (Ni‐YSZ) substrate amorphous nitrogen‐doping promotes anodic GER. N‐Co NF exhibits low potentials 1.07 1.18 V ( vs . RHE) drive 10 50 mA cm −2 , respectively. constituted two‐electrode electrolyzer NF//NiS‐Co‐NiP) displays excellent activity that only requires ultralow cell voltages 1.24 1.55 afford 200 respectively, high FE (97%) formate an durability (120 h). This study versatile approach manufacturing high‐performance Ni‐based electrocatalyst GER, paving way energy‐saving environmentally‐friendly co‐production value‐added chemicals hydrogen.

Язык: Английский

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Formation of Ni‐MOF Derived Nickel Sulfides as Efficient Electrocatalysts for Oxygen Evolution Reaction Through Optimizing the Sulfur Sources Selection

ChemistrySelect, Год журнала: 2024, Номер 9(37)

Опубликована: Окт. 2, 2024

Abstract Developing low‐cost and exceedingly efficient electrocatalysts for oxygen evolution reaction (OER) is vital application of hydrogen production from water splitting. Herein, three different nickel sulfides on foam were fabricated via a simple sulfuring the as‐formed Ni‐MOF with sulfide as sulfur source. The effect source OER performance, morphology structure as‐prepared product are well discussed. optimized Ni‐MOF/NF‐SS deliver overpotentials 253 330 mV to reach current densities 10 100 mA cm −2 small Tafel slope 70.9 mVdec −1 , stability over 50 h. This work provides insights into relationship between activity structures sulfides, but also affords new route fabricate sulfides‐based OER.

Язык: Английский

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Hierarchical WC/NiCoW hollow nanotube array as highly efficient electrocatalyst for hydrogen evolution

Chemical Communications, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

A hierarchical WC/NiCoW nanotube array enhances HER performance by promoting bubble surface release. The WC–NiCoW interface optimizes electronic structure, thus achieving high activity and stability across alkaline, acidic, neutral electrolytes.

Язык: Английский

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