Insights into the pH effect on hydrogen electrocatalysis

Chemical Society Reviews, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

This review systematically provides various insights into the pH effect on hydrogen electrocatalysis, and thus providing a reference for future development of electrocatalysis based these insights.

Язык: Английский

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Interfacial Water Regulation for Nitrate Electroreduction to Ammonia at Ultralow Overpotentials

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 8, 2025

Abstract Nitrate electroreduction is promising for achieving effluent waste‐water treatment and ammonia production with respect to the global nitrogen balance. However, due impeded hydrogenation process, high overpotentials need be surmounted during nitrate electroreduction, causing intensive energy consumption. Herein, a hydroxide regulation strategy developed optimize interfacial H 2 O behavior accelerating conversion of at ultralow overpotentials. The well‐designed Ru─Ni(OH) electrocatalyst shows remarkable efficiency 44.6% +0.1 V versus RHE nearly 100% Faradaic NH 3 synthesis 0 RHE. In situ characterizations theoretical calculations indicate that Ni(OH) can regulate structure promoted dissociation process contribute spontaneous hydrogen spillover boosting NO − Ru sites. Furthermore, assembled rechargeable Zn‐NO /ethanol battery system exhibits an outstanding long‐term cycling stability charge–discharge tests high‐value‐added ammonium acetate, showing great potential simultaneously removal, conversion, chemical synthesis. This work not only provide guidance in extensive reactions but also inspire design novel hybrid flow multiple functions.

Язык: Английский

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Transforming Adsorbate Surface Dynamics in Aqueous Electrocatalysis: Pathways to Unconstrained Performance

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 28, 2025

Abstract Developing highly efficient catalysts to accelerate sluggish electrode reactions is critical for the deployment of sustainable aqueous electrochemical technologies, yet remains a great challenge. Rationally integrating functional components tailor surface adsorption behaviors and adsorbate dynamics would divert reaction pathways alleviate energy barriers, eliminating conventional thermodynamic constraints ultimately optimizing flow within systems. This approach has, therefore, garnered significant interest, presenting substantial potential developing that simultaneously enhance activity, selectivity, stability. The immense promise rapid evolution this design strategy, however, do not overshadow challenges ambiguities persist, impeding realization breakthroughs in electrocatalyst development. review explores latest insights into principles guiding catalytic surfaces enable favorable contexts hydrogen oxygen electrochemistry. Innovative approaches tailoring adsorbate‐surface interactions are discussed, delving underlying govern these dynamics. Additionally, perspectives on prevailing presented future research directions proposed. By evaluating core identifying gaps, seeks inspire rational design, discovery novel mechanisms concepts, ultimately, advance large‐scale implementation electroconversion technologies.

Язык: Английский

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Lewis Acid-Mediated Interfacial Water Supply for Sustainable Proton Exchange Membrane Water Electrolysis

Journal of the American Chemical Society, Год журнала: 2024, Номер unknown

Опубликована: Дек. 11, 2024

The catalyst-electrolyte interface plays a crucial role in proton exchange membrane water electrolysis (PEMWE). However, optimizing the interfacial hydrogen bonding to enhance both catalytic activity and stability remains significant challenge. Here, novel catalyst design strategy is proposed based on hard-soft acid-base principle, employing hard Lewis acids (LAs = ZrO

Язык: Английский

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Defect-rich FeCoNiMnRu high-entropy alloys with activated interfacial water for boosting alkaline water/seawater hydrogen evolution

Chemical Engineering Journal, Год журнала: 2025, Номер 509, С. 161070 - 161070

Опубликована: Фев. 26, 2025

Язык: Английский

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High toughness and programmable strength in ion gels via hydrogen bond-induced microphase separation

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159608 - 159608

Опубликована: Янв. 1, 2025

Язык: Английский

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Enhanced Activity and Stability for Electrocatalytic Nitrate Reduction to Ammonia over Low‐Coordinated Cobalt

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

It is still challenging to develop an effective strategy simultaneously enhance the activity and stability of electrocatalysts for electrocatalytic nitrate reduction reaction (eNO3RR). Herein, taking metallic cobalt as example, it demonstrated that construction low-coordinated nanosheets (L-Co NSs) by H2 plasma etching electrodeposited (Co can greatly eNO3RR. Compared with Co NSs, at -0.4 V versus RHE, removal rate, ammonia partial current density, yield are increased L-Co NSs from 82.14% 98.57%, 476 683 mA cm-2, 2.11 2.54 mmol h-1 respectively. In addition, demonstrate negligible decay after 30 cycles test, while show significant decline. situ electrochemical characterizations theoretical calculations verify abundance vacancies in not only contribute optimized electronic structure enhanced desorption key intermediate boost but also facilitate transformation Co(OH)2 Co0 promote stability. Furthermore, exhibit favorable performance removing simulated wastewater air discharge-electrocatalytic cascade system produce ammonia.

Язык: Английский

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Biplane Ion‐Pairing Induced Supramolecular Assembly for High‐Performance Uranium Detection

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 24, 2025

Abstract It is still challenging to directly recognize the anionic species [UO 2 (CO 3 ) ] 4− , dominant in environment (82%‐93%), using current optical probes because of adverse effects its thick hydration shell on binding interactions. In this study, a water‐soluble Pt(II) methylated terpyridine complex ([Pt(CH ‐tpy)NCO] + supramolecular probe designed target by new strategy overlapping arrangement. The response demonstrates excellent selectivity among ≈30 investigated interfering substances, along with rapid (≈15 s), high sensitivity (64.1 n m and dual‐signals. confirmed both experimentally theoretically that superior detection performance attributed formation unique structure featuring biplane‐like building block, bicolumnar stacking water‐bridged networks, via overlap shells aligned boost superentropic driving force, distinguishable dual‐signals arises from emergence four types Pt‐Pt interactions, generating low‐energy metal‐to‐metal charge transfer adsorption/emission. addition, [Pt(CH ‐based hydrogel platform constructed for detecting cationic uranium, limit 14.89 fg. This work unlocks not only way detect but also idea sensing ions extreme layers.

Язык: Английский

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Interfacial-Free-Water-Enhanced Mass Transfer to Boost Current Density of Hydrogen Evolution

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Апрель 14, 2025

The advancement of water electrolysis highlights the growing importance electrolyzers capable operating at high current densities, where mass transfer dynamics plays a crucial role. In electrode reactions, interfacial is key factor in regulating these dynamics. However, potential utilizing interfacial-free (IFW) to modulate behavior remains underexplored. Herein, we investigate effect structure on hydrogen evolution reaction (HER) performance across different density ranges, using designed platinum-coated nickel hydroxide foam (Pt@Ni(OH)2-NF) electrodes. We reveal that with increasing density, changes alter rate-determining step HER. Pt@Ni(OH)2-NF exhibited excellent alkaline electrolytes, achieving 1000 mA cm-2 114 mV overpotential. This study provides novel approach optimizing by enhancing transfer, further paving way for more efficient and energy-saving production.

Язык: Английский

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Interface engineering of advanced electrocatalysts toward alkaline hydrogen evolution reactions

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Год журнала: 2024, Номер 66, С. 1 - 19

Опубликована: Ноя. 1, 2024

Язык: Английский

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