In Situ Preparation of Ultra‐Thin and High‐Entropy FeCoNiMnMo Nanosheet Arrays to Achieve Efficient Water/Seawater Oxidation at Large Current Density DOI
Ruotong Liu, Yang Qin, Yu Pang

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 26, 2025

Abstract High entropy hydroxide is a promising catalyst for the oxygen evolution reaction (OER) due to its high effect as well unique structure. Whereas preparation costs and problem of competing chlorine in seawater electrolysis pose challenges industrial applications. Herein, high‐entropy FeCoNiMnMo‐OH nanosheets are prepared on nickel foam substrate via facile one‐step room‐temperature corrosion engineering strategy. The morphology can effectively increase active sites enrich OH − cavity composed nanosheets, which significantly increases local alkalinity accelerates actual rate, combined with inherent synergistic multiple elements structural stability system. These advantages enable exceptional OER performance both alkaline electrolyte (247 mV at 100 mA cm −2 ) (287 ). Furthermore, it also shows excellent long‐term (stable activity 100/500 h) across different media, demonstrating remarkable durability chloride corrosion. This study establishes material design paradigm developing cost‐effective, high‐performance multi‐metallic hydroxides through engineering, providing new insights into overcoming activity‐stability‐cost trilemma systems.

Язык: Английский

Enhanced Cooperative Generalized Compressive Strain and Electronic Structure Engineering in W‐Ni3N for Efficient Hydrazine Oxidation Facilitating H2 Production DOI Open Access
Hongye Qin,

Guangliang Lin,

Jinyang Zhang

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 7, 2025

Abstract As promising bifunctional electrocatalysts, transition metal nitrides are expected to achieve an efficient hydrazine oxidation reaction (HzOR) by fine‐tuning electronic structure via strain engineering, thereby facilitating hydrogen production. However, understanding the correlation between strain‐induced atomic microenvironments and reactivity remains challenging. Herein, a generalized compressive strained W‐Ni 3 N catalyst is developed create surface with enriched states that optimize intermediate binding activate both water 2 H 4 . Multi‐dimensional characterizations reveal nearly linear evolution (HER) activity d‐band center of under state. Theoretically, enhances electron transfer capability at surface, increasing donation into antibonding orbitals adsorbed species, which accelerates HER HzOR. Leveraging modified from W incorporation, catalysts demonstrate outstanding performance, achieving overpotentials 46 mV for 10 mA cm −2 81 HzOR 100 Furthermore, achieves overall splitting low cell voltage 0.185 V 50 , maintaining stability ≈450 h. This work provides new insights dual engineering in design advanced catalysts.

Язык: Английский

Процитировано

2
Enhancing Acidic Water Electrolysis via Local Electronic Regulation of Ru/TiOx Catalyst with Oxygen Coordination Unsaturated Ti Sites DOI
Wei Xia, Kai Yuan, Xuejie Cao

и другие.

ACS Catalysis, Год журнала: 2024, Номер 15(2), С. 768 - 779

Опубликована: Дек. 25, 2024

Effective local electron regulation in ruthenium-based catalysts acidic oxygen evolution reactions (OER) remains a key challenge. The lack of unified understanding catalyst activity and stability based on limits the further development proton exchange membrane water electrolysis (PEMWE). In this study, we develop concept coordination unsaturated Ti (TiOCU) sites. Based constructed dual-oxide heterojunction interface Ru/TiOx catalyst, achieve precise modulation d-electron orbitals Ru charge redistribution between Ru–Obridge–TiOCU units strengthened Ru–O bonds suppresses formation high-valence species deactivation catalyst. Combined with density functional theory (DFT) calculations situ spectroscopic experiments, confirm that dz2 orbital significantly optimizes deprotonation process interfacial hydroxyl-rich interface, thereby enhancing OER kinetics dominance adsorbed mechanism (AEM). Consequently, exhibits superior performance, achieving current 10 mA/cm2 at an overpotential only 237 mV 0.5 M H2SO4, demonstrates for over 160 h. This work reveals application TiOCU, providing perspective transition metal defect materials electrolysis.

Язык: Английский

Процитировано

4
Revealing the regulation mechanism of carbon dots on Ni(OH)2 for optimizing methanol electrooxidation activity DOI
Man Zhao,

Liwu Qiang,

Meng Bai

и другие.

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160520 - 160520

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

0
Recent advances and challenges in single-atom catalysts for proton exchange membrane water electrolysis DOI
Wei Xia, Jinyang Zhang, Guangyu Xu

и другие.

Next Materials, Год журнала: 2025, Номер 8, С. 100553 - 100553

Опубликована: Фев. 21, 2025

Язык: Английский

Процитировано

0
Investigation of Ternary CuZnM (M = Cr, Ce, Zr, Al) Catalysts in CO2 Hydrogenation for Methanol Synthesis DOI Open Access
Jingjing Wang,

Peixiang Shi,

Jiahao Han

и другие.

Catalysts, Год журнала: 2025, Номер 15(3), С. 250 - 250

Опубликована: Март 6, 2025

The hydrogenation of CO2 to methanol over Cu-based catalysts is one the attractive routes reduce greenhouse gas emissions and generate high-value-added chemicals. Industrial CuZnAl possess some shortcomings, but various promoters can enhance activity durability for hydrogenation. Herein, we systematically investigated variations in physicochemical properties ternary CuZnM (M: Cr, Ce, Zr, Al) induced by different promoters, as well their impact on methanol. results demonstrate that catalytic followed order CZCr > CZCe CZZr CZAl, with exhibiting highest stability among them. Combined XRD, SEM, TEM, H2-TPR, TPD, XPS, Raman findings experimental results, smaller Cu particle size was conducive increasing CH3OH yield, lower Cu+/Cu0 ratio exhibited better reaction. This approach offers theoretical insights practical solutions industrial application catalysts.

Язык: Английский

Процитировано

0
Reductive Supramolecular In Situ Construction of Nano‐Platinum Effectively Couples Cathodic Hydrogen Evolution and Anodic Alcohol Oxidation DOI Creative Commons
Rui Bai,

Qiao Ye,

Cuiyu Li

и другие.

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

The deployment of high-performance catalysts and the acceleration anodic reaction kinetics are key measures to achieve maximum energy efficiency in overall water electrolysis hydrogen production systems. Here, an innovative strategy is developed by directly constructing a supramolecular framework embedded with boron clusters cucurbituril as reducing agent. This approach enabled situ conversion Pt⁴⁺ into highly dispersed, small-sized nano-platinum, which subsequently distributed on boron-carbon-nitrogen (BCN) matrix. resulting Pt/BNHCSs catalyst demonstrates ability facilitate electrocatalytic splitting for across multiple scenarios while simultaneously accelerating methanol oxidation kinetics, significantly outperforming commercial Pt/C various aspects. cathodic evolution-anodic coupling system constructed using greatly reduces consumption system. In attenuated total reflection Fourier transform infrared online differential electrochemical mass spectrometry reveals that interface enhances H₂O adsorption promotes CH₃OH→CO process, density functional theory calculations indicated BCN support facilitated evolution H₂ CH₃OH CO, elucidating mechanism promoted oxidation.

Язык: Английский

Процитировано

0
Harnessing Interfacial Cl− Ions for Concurrent Formate Production at Industrial Level via CO2 Reduction and Methanol Oxidation DOI Creative Commons
Yiqun Chen, Yan Zhang, Zhen Li

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 16, 2025

Abstract The efficient electrocatalytic conversion of CO 2 to formate is often impeded by the high energy requirements oxygen evolution reaction (OER) and limited activity selectivity reduction (CO RR). Herein, a novel strategy enhance production substituting OER with methanol oxidation (MOR) optimizing cathodic microenvironment interfacial Cl − ions presented. Through theoretical analysis, binder‐free Bi NiOOH electrodes that achieve remarkable Faradaic efficiencies (FE ) exceeding 90% at current densities 50–250 mA·cm −2 for RR MOR, respectively, are identified. These combined experimental investigations demonstrate enrichment on electrode modulates local electronic structure, fostering conducive RR. Bi–NiOOH full cell maintains FE above industry‐level (100–300 ), enabling concurrent electrosynthesis both electrodes. This work highlights critical role anion environments in electrocatalysis provides strategic framework synergistic engineering electrochemical systems.

Язык: Английский

Процитировано

0
In Situ Preparation of Ultra‐Thin and High‐Entropy FeCoNiMnMo Nanosheet Arrays to Achieve Efficient Water/Seawater Oxidation at Large Current Density DOI
Ruotong Liu, Yang Qin, Yu Pang

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 26, 2025

Abstract High entropy hydroxide is a promising catalyst for the oxygen evolution reaction (OER) due to its high effect as well unique structure. Whereas preparation costs and problem of competing chlorine in seawater electrolysis pose challenges industrial applications. Herein, high‐entropy FeCoNiMnMo‐OH nanosheets are prepared on nickel foam substrate via facile one‐step room‐temperature corrosion engineering strategy. The morphology can effectively increase active sites enrich OH − cavity composed nanosheets, which significantly increases local alkalinity accelerates actual rate, combined with inherent synergistic multiple elements structural stability system. These advantages enable exceptional OER performance both alkaline electrolyte (247 mV at 100 mA cm −2 ) (287 ). Furthermore, it also shows excellent long‐term (stable activity 100/500 h) across different media, demonstrating remarkable durability chloride corrosion. This study establishes material design paradigm developing cost‐effective, high‐performance multi‐metallic hydroxides through engineering, providing new insights into overcoming activity‐stability‐cost trilemma systems.

Язык: Английский

Процитировано

0