Nanoscale, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Hydrogen production by proton exchange membrane water electrolysis requires an anode with low overpotential for oxygen evolution reaction (OER) and robustness in acidic solution. While exploring new electrode materials to improve the performance durability, optimizing morphology of typical using methods is a big challenge science. RuO
Language: Английский
ACS Sustainable Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 11(50), P. 17564 - 17594
Published: Dec. 6, 2023
Proton exchange membrane water electrolysis (PEMWE) is considered the most compatible technology with intermittent renewable energies for clean hydrogen generation. More than that, compared alkaline electrolyzers, totality of practicality enhances due to obvious advantages such as efficiency, high purity, low operation pressure, etc. However, sluggish four-electron-transfer reaction oxygen evolution (OER), which involves complex intermediates and multiple steps, significantly impacts overall efficiency PEMWE. Therefore, developing highly efficient, stable, low-cost high-tech electrocatalysts acidic OER crucial. In comparison expensive commercial iridium or oxide electrocatalyst, Ru oxides are much cheaper alternatives that demonstrate superior catalytic performance OER. this perspective, generally accepted mechanisms including AEM LOM introduced corresponding pathways. Then, Ru-based explicated on performances OER, include metal metal-based alloys, RuO2-based catalysts, solid solutions, perovskites, pyrochlores, single atoms, other catalysts. Finally, challenges future research perspectives catalysts discussed.
Language: Английский
Citations
14
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
International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 92, P. 657 - 671
Published: Oct. 30, 2024
Language: Английский
Citations
5
Green Energy & Environment, Journal Year: 2023, Volume and Issue: 9(6), P. 937 - 948
Published: Dec. 13, 2023
RuO2 has been considered a potential alternative to commercial IrO2 for the oxygen evolution reaction (OER) due its superior intrinsic activity. However, inherent structure dissolution in acidic environments restricts applications. In this study, we report novel Pd-doped ruthenium oxide (Pd-RuO2) nanosheet catalyst that exhibits improved activity and stability through synergistic effect of Pd modulation Ru electronic two-dimensional structure. The excellent performance, achieving an overpotential only 204 mV at current density 10 mA cm-2. Impressively, after undergoing 8000 cycles cyclic voltammetry testing, merely decreased by 5 mV. PEM electrolyzer with Pd0.08Ru0.92O2 as anode survived almost 130 h operation 200 To elucidate underlying mechanisms responsible enhanced stability, conducted X-ray photoelectron spectroscopy (XPS) analysis, which reveals electron transfer from effectively circumvents over-oxidation Ru, thus playing crucial role enhancing catalyst's stability. Furthermore, functional theory (DFT) calculations provide compelling evidence introduction into modulates correlations facilitates thereby preventing Ru. Additionally, application inhibited aggregation growth nanoparticles, further bolstering structural integrity catalyst.
Language: Английский
Citations
13
ACS Catalysis, Journal Year: 2024, Volume and Issue: 15(2), P. 768 - 779
Published: Dec. 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.
Language: Английский
Citations
4
Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179779 - 179779
Published: March 1, 2025
Language: Английский
Citations
0
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: May 1, 2025
Green hydrogen production via proton exchange membrane water electrolysis (PEMWE) faces economic feasibility challenges, primarily due to its reliance on noble metal catalysts. While cost-effective Ru-based catalysts show promise as alternatives expensive Ir-based for an anodic oxygen evolution reaction, their long-term performance is compromised by overoxidation at high current densities. In addressing this challenge, we present a cooperative dual-site strategy atomic-scale incorporation of high-valent d0-metal cations into RuO2. This synthesis results in uniformly distributed Ru-O-d0metal bonds, effectively reconciling the activity and stability trade-off. Leveraging these effects, our optimized Ta1/RuO2 catalyst demonstrates exceptional performance, with low overpotential 164 ± 2 mV stable operation 1000 h 100 mA cm-2. practical PEMWE systems, achieves 1.58 V A cm-2, surpassing 2026 Department Energy target, maintains remarkable over 650 500 breakthrough offers highly active durable system suitable industrial-scale applications.
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
Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 682, P. 548 - 555
Published: Dec. 1, 2024
Language: Английский
Citations
3
ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: 7(3), P. 941 - 950
Published: Jan. 12, 2024
Developing an active, affordable, and stable catalyst for efficient oxygen evolution during water electrolysis remains a formidable task in contemporary research. The sluggish kinetics of the reaction (OER) continues to impede overall efficiency process. A comprehensive approach is demonstrated here develop multiple catalytic active components into single system by means integrating bimetallic hydroxide (NiFe(OH)x) with amorphous molybdenum sulfide (MoSx) heterostructure using rational strategies. This proposed fabrication strategy enables activity be enhanced fast electron transfer, resulting OER strong alkaline media through synergistic effects effective modulation electronic interactions. Moreover, composite electrode (MoSx/NiFe(OH)x/NF) displayed lowest overpotential Tafel slope 298 mV at 50 mA cm–2 47.25 dec–1, respectively, as well good stability under large currents over prolonged period 48 h without degradation. found dynamically reform surface layer's phase after catalyzing reactions serve oxidation. These results have not only led development robust electrocatalyst but also opened up several possibilities developing multicomponent electrocatalytic systems one material that can integrated conventional designs.
Language: Английский
Citations
2