Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 1, 2024
Language: Английский
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(16)
Published: Feb. 29, 2024
Abstract Alkaline water electrolysis (AWE) plays a crucial role in the realization of hydrogen economy. The design and development efficient stable bifunctional catalysts for both evolution reaction (HER) oxygen (OER) are pivotal to achieving high‐efficiency AWE. Herein, WC 1‐x /Mo 2 C nanoparticle‐embedded carbon nanofiber (WC C@CNF) with abundant interfaces is successfully designed synthesized. Benefiting from electron transfer behavior Mo , electrocatalysts C@CNF exhibit superior HER OER performance. Furthermore, when employed as anode cathode membrane electrode assembly devices, catalyst exhibits enhanced catalytic activity remarkable stability 100 hours at high current density 200 mA cm −2 towards overall splitting. experimental characterizations theoretical simulation reveal that modulation d‐band center C@CNF, achieved through asymmetric charge distribution resulting built‐in electric field induced by work function, enables optimization adsorption strength hydrogen/oxygen intermediates, thereby promoting kinetics This provides promising strategies designing highly active energy conversion fields.
Language: Английский
Citations
70
Catalysts, Journal Year: 2023, Volume and Issue: 13(12), P. 1497 - 1497
Published: Dec. 7, 2023
Hydrogen has emerged as an important candidate for clean energy, owing to its environmentally friendly advantages. Electrolytic hydrogen production stands out the most promising technology production. Therefore, design of highly efficient electrocatalysts is significant drive application technologies. Platinum (Pt)-based catalysts are famous their outstanding performance in evolution reaction (HER). However, expensive cost limits wide application. Ruthenium (Ru)-based have received extensive attention due relatively lower and HER similar that Pt. Nevertheless, Ru-based still unable meet industrial demands. improving through modification remains significant. In this review, mechanism analyzed latest research progress summarized. From perspective, addressing adsorption intermediates on electrocatalyst surface, adsorption–activation interface water molecules, behavior molecules proposing solutions enhance main findings, ultimately contributing promoting field electrocatalysis.
Language: Английский
Citations
67
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)
Published: April 2, 2024
The ion extraction and electro/photo catalysis are promising methods to address environmental energy issues. Covalent organic frameworks (COFs) a class of template construct absorbents catalysts because their stable frameworks, high surface areas, controllable pore environments, well-defined catalytic sites. Among them, ionic COFs as unique crystalline porous materials, with charges in the or along walls, have shown different properties resulting performance these applications those from charge-neutral COFs. In this review, current research progress based on for conversion, including cationic/anionic materials is reviewed terms synthesis strategy, modification methods, mechanisms adsorption catalysis, well applications. Finally, we demonstrated challenges future development design strategies
Language: Английский
Citations
30
Science Advances, Journal Year: 2024, Volume and Issue: 10(23)
Published: June 5, 2024
Alloying has proven power to upgrade metallic electrocatalysts, while the traditional alloys encounter limitation for optimizing electronic structures of surface sites in a continuous manner. High-entropy (HEAs) overcome this by manageably tuning adsorption/desorption energies reaction intermediates. Recently, marriage nanotechnology and HEAs made considerable progresses renewable energy technologies, showing two important trends size diminishment multidimensionality. This review is dedicated summarizing recent advances that are rationally designed electrocatalysis. We first explain advantages as electrocatalysts from three aspects: high entropy, nanometer, multidimension. Then, several structural regulation methods proposed promote electrocatalysis HEAs, involving thermodynamically nonequilibrium synthesis, regulating (sub-)nanosize anisotropic morphologies, well engineering atomic ordering. The general relationship between electrocatalytic properties further discussed. Finally, we outline remaining challenges field, aiming inspire more sophisticated HEA-based nanocatalysts.
Language: Английский
Citations
21
Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(21)
Published: Feb. 19, 2024
Abstract The inefficiency of Pt and Pd benchmark catalysts in achieving complete ethanol oxidation, coupled with their inherent susceptibility to poisoning, poses a significant obstacle the advancement direct fuel cells. In this study, development self‐supported ultrathin RhCuBi trimetallenes, demonstrating exceptional performance electrooxidation through segregation interface engineering is presented. distinctive RhBi‐rich crystalline/RhCu‐rich amorphous heterostructure trimetallenes creates wealth highly active interfacial sites for oxidation reaction (EOR). This results an impressive 43.3% Faradaic efficiency C1 pathway peak mass activity 1.11 A mg Rh −1 at 0.68 V versus reversible hydrogen electrode. Moreover, retain 60% initial after 8.5 h constant potential electrolysis, outperforming commercial (<3%). In/ex situ infrared spectroscopy directly reveals generated products key CH 3 CO* intermediates EOR on trimetallenes. Theoretical calculations confirm that RhBi alloy, particularly lattice‐stretched crystalline/amorphous sites, facilitates adsorption/activation dehydrogenation toward EOR. breakthrough offers promising prospects enhancing stability cell applications.
Language: Английский
Citations
20
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(21)
Published: Feb. 14, 2024
Abstract Single‐atom decorating of Pt emerges as a highly effective strategy to boost catalytic properties, which can trigger the most active sites while blocking smallest number atoms. However, rational design and creation high‐density single‐atoms on surface remain huge challenge. Herein, customized synthesis surface‐enriched single‐Bi‐atoms tailored nanorings ( SE‐Bi 1 /Pt NRs ) toward methanol oxidation is reported, guided by density functional theory (DFT) calculations suggesting that relatively higher Bi species ensure CO‐free pathway accelerate kinetics *HCOOH formation. Decorating with dense achieved starting from PtBi intermetallic nanoplates (NPs) intrinsically isolated atoms subsequent etching annealing treatments. The exhibit mass activity 23.77 A mg −1 in alkaline electrolyte, 2.2 12.8 times than those Pt‐Bi Pt/C, respectively. This excellent endows high likelihood be used practical anodic electrocatalyst for direct fuel cells （DMFCs） power 85.3 mW cm −2 ultralow loading 0.39 .
Language: Английский
Citations
18
Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(22)
Published: April 2, 2024
Abstract The ion extraction and electro/photo catalysis are promising methods to address environmental energy issues. Covalent organic frameworks (COFs) a class of template construct absorbents catalysts because their stable frameworks, high surface areas, controllable pore environments, well‐defined catalytic sites. Among them, ionic COFs as unique crystalline porous materials, with charges in the or along walls, have shown different properties resulting performance these applications those from charge‐neutral COFs. In this review, current research progress based on for conversion, including cationic/anionic materials is reviewed terms synthesis strategy, modification methods, mechanisms adsorption catalysis, well applications. Finally, we demonstrated challenges future development design strategies
Language: Английский
Citations
17
International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 103, P. 205 - 212
Published: Jan. 18, 2025
Language: Английский
Citations
2
Chemical Science, Journal Year: 2024, Volume and Issue: 15(12), P. 4349 - 4357
Published: Jan. 1, 2024
Novel freestanding M-PtBiMo IMSs were achieved via a simple and effective one-step wet chemical method. The as highly efficient anode electrocatalysts boosted the activity stability toward EGOR actual DEGFCs.
Language: Английский
Citations
15
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(38)
Published: July 24, 2024
Constructing well-defined active multisites is an effective strategy to break linear scaling relationships develop high-efficiency catalysts toward multiple-intermediate reactions. Here, dual-intermetallic heterostructure composed of tungsten-bridged Co
Language: Английский
Citations
15