Published: Jan. 1, 2024
Language: Английский
Nano Letters, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 13, 2024
Electrochemical acidic oxygen evolution reaction (OER) is an important part for water electrolysis utilizing a proton exchange membrane (PEM) apparatus industrial H
Language: Английский
Citations
16
Advanced Science, Journal Year: 2024, Volume and Issue: 11(38)
Published: Aug. 9, 2024
Abstract Hydrogen, a clean resource with high energy density, is one of the most promising alternatives to fossil. Proton exchange membrane water electrolyzers are beneficial for hydrogen production because their current facile operation, and gas purity. However, large‐scale application electrochemical splitting acidic electrolytes severely limited by sluggish kinetics anodic reaction inadequate development corrosion‐ highly oxidation‐resistant anode catalysts. Therefore, catalysts excellent performance long‐term durability must be developed oxygen evolution reactions (OER) in media. This review comprehensively outlines three commonly employed strategies, namely, defect, phase, structure engineering, address challenges within OER, while also identifying existing limitations. Accordingly, correlation between material design strategies catalytic discussed terms contribution activity stability. In addition, various nanostructures that can effectively enhance catalyst at mesoscale summarized from perspective engineering technology, thus providing suitable satisfy industrial requirements. Finally, future outlook area OER presented.
Language: Английский
Citations
9
Dalton Transactions, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
The design of acidic oxygen evolution reaction (OER) electrocatalysts with high activity and durability is the key to achieving efficient hydrogen production. Herein, we report a Cr-doped RuO
Language: Английский
Citations
1
ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(7), P. 3016 - 3024
Published: June 13, 2024
Developing ruthenium-based (Ru-based) catalysts with a heterointerface is essential to improving the acidic oxygen evolution reaction (OER) performance. In this study, we first prepared RuO2/CoMnO3 nanosheet by solid-phase pyrolysis, featuring low Ru content, and presented high OER mass activity (1742.9 A gRu–1 at 1.53 V) superior stability (500 h 10 mA cm–2) in 0.5 M H2SO4 under three-electrode system. Notably, Co Mn sites facilitated electron transfer through bridge avoid overoxidation, as proved increase average surface oxidation state (SOS) of insignificant change SOS after chronopotentiometry test. Moreover, can reduce energy barrier restrain participation lattice oxygen. This work indicates significant potential employing well-supported an adjustable prominently improve Ru-based catalysts.
Language: Английский
Citations
8
eScience, Journal Year: 2024, Volume and Issue: unknown, P. 100323 - 100323
Published: Oct. 1, 2024
Language: Английский
Citations
7
Energy Reviews, Journal Year: 2024, Volume and Issue: 3(4), P. 100103 - 100103
Published: July 16, 2024
This article presents a strategy for enhancing the catalytic performance and stability of anodic electrocatalysts in proton exchange membrane (PEM) water splitting. PEM splitting is sustainable method producing hydrogen oxygen from utilizing electrocatalysts. However, employed this process are crucial its commercialization due to harsh condition causing low stability. The main focus review strategies improving as well electrocatalysts, such doping with heteroatoms, alloying other metals. results demonstrate that these modifications can significantly enhance These open new possibilities development efficient stable splitting, paving way widespread use clean energy applications.
Language: Английский
Citations
5
ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: 8(1), P. 194 - 207
Published: Jan. 2, 2025
Proton exchange membrane water electrolysis (PEMWE) gained significant focus among the scientific community as a promising solution for green hydrogen production. Noble metals, platinum (Pt) and iridium in particular, play role case of large-scale implementation due to limited availability. Recently, aerogel materials have been integrated into PEMWE cell designs enhance durability reduce high catalyst noble metal loadings. In this work, we present first time Pt nanoparticle-based (NP-based) cryoaerogel an active layer directly applied on carbon support gas diffusion (GDL) at cathode side. Some challenges were successfully overcome during manufacturing process (i.e., wettability mechanical connection issues). A pyrolysis step is employed improve between GDL. The structure synthesized found be greatly influenced by temperature confirmed scanning electron microscopy (SEM), transmission (TEM) X-ray photoelectron spectroscopy (XPS). electrochemical characterization involves polarization curves, impedance measurements, voltage loss breakdown well 500 h test. results show that has stable reproducible performance with mass activity reached low loading 0.15 mgPt cm–2.
Language: Английский
Citations
0
Applied Physics Reviews, Journal Year: 2024, Volume and Issue: 11(2)
Published: May 22, 2024
The utilization of water electrolysis for green hydrogen (H2) production, powered by renewable energy, is a promising avenue sustainable development. Proton-exchange-membrane (PEMWE) stands out as one the most efficient H2 production technologies. However, implementing it on an industrial scale faces substantial challenges, particularly regarding oxygen evolution reaction (OER). OER, critical process with inherently slow kinetics requiring additional potential, significantly influences overall water-splitting efficiency. Most OER electrocatalysts in PEMWE struggle poor stability harsh acidic environments at high oxidative potentials. While rare-earth metal oxides, such iridium or ruthenium offer commercial oxygen-evolving (OECs), their use depends achieving economically and sustainably viable operations. An alternative approach involves developing low- non-noble metal-based OECs sustaining activity long-term durability. Although materials currently exhibit lower than noble-based OECs, notable progress has been made enhancing performance. This review provides overview recent advancements designing acidic-stable based low without noble contents. It delves into thermodynamics degradation mechanisms media, evaluation parameters stability, strategies active acid-stable challenges opportunities acid electrolysis. Through detailed analysis these aspects, aims to identify engineering actively durable OECs.
Language: Английский
Citations
3
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
Citations
0
Advanced Theory and Simulations, Journal Year: 2025, Volume and Issue: unknown
Published: May 7, 2025
Abstract The rational design of active and stable electrodes is crucial for the development efficient durable water electrolyzers. However, theoretical studies exploring structural factors that dictate catalytic activity dissolution stability remain scarce. This study investigates several by examining trends in activity, stability, oxidation state Ir single atoms during oxygen evolution reaction (OER). Using computational methods such as Density Functional Theory (DFT) Molecular Dynamics (MD) simulations, structure single‐atom catalysts (SACs) analyzed across a range states, which influenced electrode potential environmental pH. findings indicate applying to SAC‐supported covalent organic framework (COF) 0.5 ∼ < U 1.1 can lead formation an OIrOH structure, resulting outstanding OER activity. Importantly, while not necessary overcome potential‐limiting step, it stabilization highly SAC structure. work offers valuable insights guide experimental efforts designing high‐performance SACs with enhanced
Language: Английский
Citations
0