Bridged Mn─O─Ru Motifs in RuO2 Catalyst Promoting Hydrogen Production at Ampere‐Level Current Density DOI
Qiqi Li,

Qiulin Xu,

Zhen Pei

et al.

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract Accurately regulating the reactive sites of catalysts is vital for highly efficient catalytic processes but still faces considerable challenges. In view this, a local oxidation‐state asymmetric Mn‐O‐Ru bridged moiety developed by introducing Mn atoms into RuO 2 host. The synergistic effect respective active on microstructure ensures its excellent alkaline HER performance. Theoretical calculations profiled that induced moiety, water dissociation ability Ru significantly boosted, while bridging oxygen exhibits optimal hydrogen adsorption free energy. As predicted, Mn‐RuO catalyst achieved overpotentials as low 118 and 160 mV at industrial level current densities 1 A cm ‒2 in m KOH, respectively, superior to commercial Pt/C catalyst. Such electrocatalyst can operate stably with long lifetime 300 h 10 mA under conditions. Furthermore, it only requires 1.87 V reach density 1.0 when serving cathode an assembled flow cell. This work provides new insight environment design obtaining ideal electrocatalysts.

Language: Английский

Recent Advances and Perspectives on Coupled Water Electrolysis for Energy‐Saving Hydrogen Production DOI Creative Commons
Jiachen Li,

Yuqiang Ma,

Xiaogang Mu

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract Overall water splitting (OWS) to produce hydrogen has attracted large attention in recent years due its ecological‐friendliness and sustainability. However, the efficiency of OWS been forced by sluggish kinetics four‐electron oxygen evolution reaction (OER). The replacement OER alternative electrooxidation small molecules with more thermodynamically favorable potentials may fundamentally break limitation achieve production low energy consumption, which also be accompanied value‐added chemicals than or electrochemical degradation pollutants. This review critically assesses latest discoveries coupled various OWS, including alcohols, aldehydes, amides, urea, hydrazine, etc. Emphasis is placed on corresponding electrocatalyst design related mechanisms (e.g., dual hydrogenation N–N bond breaking hydrazine C═N regulation urea inhibit hazardous NCO − NO productions, etc.), along emerging reactions (electrooxidation tetrazoles, furazans, iodide, quinolines, ascorbic acid, sterol, trimethylamine, etc.). Some new decoupled electrolysis self‐powered systems are discussed detail. Finally, potential challenges prospects highlighted aid future research directions.

Language: Английский

Citations

3
Electrocatalytic microdevices based on transition metal dichalcogenides for hydrogen evolution DOI

C. R. Sun,

Longlu Wang, Yuxing Liu

et al.

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Chemical reactions and electronic properties are two vital aspects in the systematic study of electrocatalytic reactions.

Language: Английский

Citations

2
Dual Cocatalytic Sites Synergize NiFe Layered Double Hydroxide to Boost Oxygen Evolution Reaction in Anion Exchange Membrane Water Electrolyzer DOI
Yue Shi,

Lumin Song,

Yan Liu

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 21, 2024

Abstract Nickel‐iron layered double hydroxide (LDH) is a promising cost‐efficient catalyst to replace noble metals for alkaline oxygen evolution reaction (OER), yet its intrinsic activity under high current density conditions not satisfactory, which greatly constrains the industrial application of NiFe LDH catalysts. Herein, new class integrated Co and W co‐doped catalysts reported with dual cocatalytic sites OER catalysis. The optimized 2.8 , 3.8 ‐NiFe has superior (255 mV@1000 mA cm −2 ) excellent catalytic stability (200 h@500 ). turnover frequency value can reach 4.02 s −1 at 1.49 V versus RHE, 9.6 times higher than that metal Moreover, it achieve 1.0 A 1.86 maintain 300‐h stable operation in anion exchange membrane water electrolyzer. Theoretical experimental studies indicate promote *OH adsorption favor protons desorption OH*. These jointly *O coverage, effectively accelerating kinetic.

Language: Английский

Citations

10
C‒C Bond Cleavage Driven by Lattice Oxygen during Ethanol Oxidation Process DOI Open Access
Wen Zhang,

Yingxiu Zhao,

Jiayi Li

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 24, 2025

Abstract The capacity of C‒C bond cleavage determines the pathway selectivity during ethanol oxidation process. Herein, ultra‐thin monodisperse PdCo nanosheets with an average diameter 33 nm are successfully synthesized and interface Pd‐O‐Co is further constructed due to introduction lattice oxygen. Due their nanosheet structure, unique surface electronic structures driven by oxygen, alloying effect, prepared PdCo/Pd‐O‐Co (PdCo/Pd‐O‐Co NSs) show excellent reaction (EOR) activity stability. mass specific NSs 12.43 A mg −1 22.01 mA cm −2 for EOR, which exceeded nanosheets, Pd commercial black. In situ FTIR spectroscopy theoretical calculation identified that oxygen introduced after square‐wave potential treatment can promote bond. Through combined strain engineering, optimized generation strong p‐d orbital hybridization, led upward shift d‐band center electron delocalization effectively promoting improving anti‐poisoning ability.

Language: Английский

Citations

1
High‐Entropy Layered Double Hydroxides for Efficient Methanol Electrooxidation DOI Open Access
Yuying Wang,

Yihang Hu,

Zhaohui Wu

et al.

Small, Journal Year: 2025, Volume and Issue: 21(11)

Published: Feb. 16, 2025

Abstract The electrocatalytic methanol oxidation reaction (MOR) is considered as an effective method to replace oxygen evolution (OER) for efficient hydrogen production. However, the sluggish kinetics and difficulty of breaking C─H bond Ni‐based catalysts limit further application. Herein, three high‐entropy layered double hydroxides (HELHs), namely ZnNiFeCoV‐HELH, ZnNiFeCoCr‐HELH, ZnNiFeCoAl‐HELH (denoted V‐HELH, Cr‐HELH, Al‐HELH, respectively), are successfully synthesized. Among them, V‐HELH displays lowest potential 1.39 V at 100 mA cm −2 compared Cr‐HELH (1.41 V) Al‐HELH (1.44 V). After five cycles, formate yield maintains over 95% first cycle with excellent stability. Such outstanding performance surpasses that most state‐of‐the‐art MOR reported so far. A series experiments reveal exhibits fastest largest number active Ni 3+ species. Further investigations theoretical calculations prove shows strongest adsorption energy −3.31 eV. introduction vanadium (V) relatively larger tensile strain optimizes d─band center (−0.54 eV) lowers barrier (−1.62 from * CH 3 O 2 O. This work provides new insights rational design electrocatalysts.

Language: Английский

Citations

1
Pt quantum dots coupled with NiFe LDH nanosheets for efficient hydrogen evolution reaction at industrial current densities DOI Open Access

Boxue Wang,

Xinru Zhao,

Huachuan Sun

et al.

Microstructures, Journal Year: 2025, Volume and Issue: 5(2)

Published: Feb. 26, 2025

Developing efficient and economical electrocatalysts for hydrogen generation at high current densities is crucial advancing energy sustainability. Herein, a self-supported evolution reaction (HER) electrocatalyst rationally designed prepared on nickel foam through simple two-step chemical etching method, which consists of Pt quantum dots (PtQDs) coupled with nickel-iron layered double hydroxide (NiFe LDH) nanosheets (named PtQDs@NiFe LDH). The characterization results indicate that the introduction PtQDs induces more oxygen vacancies, thereby optimizing electronic structure LDH. This modification enhances conductivity accelerates adsorption/desorption kinetics intermediates in LDH, ultimately resulting exceptional catalytic performance HER large densities. Specifically, LDH delivers 500 2000 mA·cm-2 remarkably low overpotentials 92 252 mV, respectively, markedly outperforming commercial Pt/C (η500 = 190 η2000 436 mV). Moreover, when employing NiFe precursor catalyst as anode cathode, an overall water electrolysis system, only 1.66 V 2.02 are required to achieve mA·cm-2, while maintaining robust stability 200 h. study introduces feasible approach developing industrial-scale

Language: Английский

Citations

1
Pt-Loaded CoFe-Layered Double Hydroxides for Simultaneously Driving HER and HzOR DOI

Tianrui Yu,

Guihao Liu, Tianqi Nie

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(19), P. 14937 - 14946

Published: Sept. 25, 2024

Language: Английский

Citations

8
Recent progress of advanced electrocatalysts for hydrogen production via hydrazine-assisted water electrolysis DOI
Yun Tong, Pengzuo Chen

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(19), P. 6218 - 6245

Published: Jan. 1, 2024

This review offers a comprehensive summary of the advanced electrocatalysts for HzOR-assisted water electrolysis. The inherent relationship between various regulatory strategies and catalytic performance is discussed.

Language: Английский

Citations

7
Ru Nanoparticles Modified and V-Doped NiFe-Layered Double Hydroxide as Efficient Electrocatalyst for Overall Urea Splitting DOI
Shuting Wang, Aize Hao, Zhiwei Liu

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 13, 2024

Constructing low-cost, high-efficiency, and earth-abundant electrocatalysts for enhancing the energy efficiency of water splitting is highly desirable. Herein, we employed a facile strategy V cation doping Ru nanoparticles modification to construct multifunctional NiFe-LDH electrocatalyst (Ru/V-NiFe-LDH) on nickel foam (NF) substrate. This Ru/V-NiFe-LDH/NF catalyst exhibited exceptional catalytic activity (e.g., small overpotentials Tafel slope) good stability in HER, OER, UOR, indicating significantly lower than that commercial Pt–C RuO2. These excellent electrochemical properties primarily resulted from effects modification, which altered surface charge state matrix, led electron rearrangement, accelerated transfer, provided more active sites, enhanced intrinsic activity. Moreover, when assembled into two-electrode system with overall water/urea splitting, low cell voltage 1.53 1.40 @10 mA cm–2 was afforded. Furthermore, this also outstanding stability, only 19% decay high current density at 50 after 48 h. performances far surpass those RuO2||Pt–C most nonprecious-metal catalysts. work highlights rational design high-performance applications.

Language: Английский

Citations

7
Atomically Dispersed Interstitial Phosphorus Boosts Alkaline Hydrogen Evolution Performance of Co Catalysts DOI
Yue Shi,

Mengna Wang,

Dan Zhang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 15, 2024

Abstract Introducing interstitial light atoms shows great potential in improving the intrinsic activity and stability of metal catalysts owing to strongly affecting electronic structure adsorption properties. However, filling atomically dispersed into lattices further unveiling their effects are still limited by tightly arranged lattices. Herein, study reports a calcination reduction assisted trace strategy form series single filled Co‐based (Co‐X@NF, X = P, N NF nickel foam), therefore constructing monometallic atomic interfaces between P‐coordinated Co δ+ 0 promote alkaline hydrogen evolution reaction (HER). Noteworthy, optimal Co‐P 0.43 @NF with rich interfacial very high turnover frequency values (5.64 s −1 ), which is close noble level far exceeds non‐noble catalysts. Meanwhile, it maintains excellent 150 h at 100 mA cm −2 . Theoretical studies prove that promotes H 2 O dissociation optimizes H* energy, thus forming highly active interfaces, greatly accelerates HER kinetics.

Language: Английский

Citations

6