A designed hierarchical porous Cu–Ni/Ni–Cu alloy converted from commercial nickel foam as versatile electrocatalysts for efficient and extremely stable water splitting

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 137565 - 137565

Опубликована: Апрель 1, 2025

Язык: Английский

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Chlorine repulsion layer via splicing of S, N co-doped carbon dots for photoelectrochemical seawater splitting

Materials Today Energy, Год журнала: 2025, Номер unknown, С. 101883 - 101883

Опубликована: Апрель 1, 2025

Язык: Английский

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Visualization of the Key Proton Activities in Hydrogen Evolution Reaction by Electrochromic Catalyst

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 21, 2025

Abstract The electrocatalytic hydrogen evolution reaction (HER) is a promising route to produce sustainable energy carrier for global carbon neutrality. HER performance largely determined by the overall proton activities, but identification of such key activities in microscopic process rather difficult. Herein, study demonstrates visualized concept integrating fundamental with electrochromic technology on well‐designed Pt@WO 3 platform acidic electrolyte, where can be rapidly discriminated color changes electrode. In contrast bare WO counterpart, electrode displays more positive potential initial‐coloration state and faster decoloration rate associated significantly improved kinetics intercalation deintercalation within component. Correspondingly, as‐prepared catalyst exhibits remarkable activity lower onset‐potential (45 mV, adsorption accumulation) smaller Tafel slope (50 mV dec −1 , desorption), nearly 11.1‐ 3.5‐fold enhancement than those counterpart. It believed that work interesting visualization functionality into may improve readability advance exploration intelligent electrocatalysts.

Язык: Английский

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Hierarchical NiFeMoO₄ Precatalyst Reconstructed NiFeOOH Anodes for Efficient and Durable Anion-Exchange Membrane Water Electrolysis

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

Anion-exchange membrane water electrolysis (AEM-WE) offers a promising alternative for efficient electrolysis, providing low-cost and high-purity hydrogen production. However, the slow reaction kinetics associated with oxygen evolution (OER) continue to pose significant obstacle. In this work, we synthesized nanometer micron hierarchical NiFeMoOx as OER precatalysts, which were completely reconstructed into NiFeOOH (h-NiFeOOH), demonstrating remarkable activity, overpotentials of 162/245 mV required achieve current densities 10/1000 mA cm-2 in 1.0 M KOH. Additionally, it demonstrated robust stability exceeding 1000 h at cm-2. Furthermore, h-NiFeOOH excellent long-term AEM-WE, maintaining density cell voltage 1.55 V (80 °C) over 160 achieving reliable performance beyond room temperature. situ analyses, including X-ray absorption fine structure (XAFS), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), combined functional theory (DFT) calculations, reveal that process primarily follows an adsorption mechanism (AEM) Ni site. Meanwhile, Fe3+ acts Lewis acid, promoting valence thereby enhancing performance. This study emphasized crucial role precatalyst engineering NiFe-based catalysts analyzed Fe catalytic cycle.

Язык: Английский

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Chloride-resistant vacancy-rich CoFe catalysts for robust alkaline seawater electrolysis

Journal of Power Sources, Год журнала: 2025, Номер 646, С. 237292 - 237292

Опубликована: Май 11, 2025

Язык: Английский

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