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
Progress in Materials Science, Journal Year: 2024, Volume and Issue: 145, P. 101294 - 101294
Published: April 5, 2024
Language: Английский
Citations
31
ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(11), P. 4551 - 4564
Published: March 1, 2024
A metal–organic framework (MOF) embedded by transition metal sulfide (TMS) particles is one of the promising electrocatalyst candidates for overall water splitting (OWS) due to large surface area and abundant active sites from MOF precursor, as well tunable electronic structure higher intrinsic conductivity TMS. More importantly, its self-restructuring under alkaline conditions will lead chemical composition phase evolution catalyst surface, which source further enhanced catalytic activity. semi-MOF (labeled Co@Ni/Fe-MS/MOF) with semisacrificial template a TMS particle guest was designed exercisable universal heteroatomic Co doping partial vulcanization. The TMS/MOF heterostructure establishes an ideal bridge electron transfer. Simultaneously, dopant synergistic effect multiple also effectively regulate charge environment around sites, jointly improve adsorption/desorption kinetics reaction intermediates. As result, Co@Ni/Fe-MS/MOF exhibits distinguished overpotential (η10 = 229 mV OER, η10 174 HER) Tafel slope (52.37/114.35 dec–1 OER/HER), unrivaled long-term durability (80 h OWS). Moreover, two-electrode ∥ cell illustrates small voltage 1.54 V achieve power 10 mA cm–2. Impressively, this superior OER property comes three-layer sandwich restructured hybrid semi-MOFs in true sites. This work aspired catalyst, induce effects, shed light on preparation materials heterogeneous interface engineering, evolution.
Language: Английский
Citations
19
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
International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 105, P. 116 - 125
Published: Jan. 22, 2025
Language: Английский
Citations
1
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 23, 2025
Abstract The oxygen evolution reaction (OER) in proton exchange membrane water electrolyzers (PEMWE) has long stood as a formidable challenge for green hydrogen sustainable production, hindered by sluggish kinetics, high overpotentials, and poor durability. Here, these barriers are transcended through novel material design: strategic engineering of high‐density grain boundaries within solid‐solution Ru 0.8 Ir 0.2 O x ultrathin nanosheets. These carefully tailored synergistic Ir─Ru interactions, reduce the coordination atoms optimize distribution charge, thereby enhancing both catalytic activity stability nanosheets, verified merely requiring an overpotential 189 mV to achieve 10 mA cm −2 acidic electrolyte. In situ electrochemical techniques, complemented theoretical calculations, reveal that OER follows adsorption mechanism, demonstrating pivotal role boundary electronic modulation accelerating kinetics. Most notably, exhibits outstanding industrial‐scale performance PEMWE, reaching 4.0 A at 2 V maintaining >1000 h 500 . This efficiency reduces production costs $0.88 kg −1 work marks transformative step forward designing efficient, durable catalysts, offering promising pathway toward technologies advancing global transition energy.
Language: Английский
Citations
1
ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(6), P. 2313 - 2323
Published: Jan. 27, 2024
The proton exchange membrane (PEM) water hydrolyzer is crucial to promoting the sustainable development of hydrogen energy and facilitating large-scale transformation. However, achieving sustained stable oxygen evolution reaction (OER) in acidic solutions presents a significant challenge for noniridium based electrocatalysts. Herein, we develop Co3O4-supported RuO2 electrocatalyst with optimized catalyst–support interface interactions breaking activity–stability trade-off relationship OER. Through detailed electrochemical experiments characterization analysis, demonstrate that crystal growth Co3O4 support can be precisely regulated by modifying ligand layer-confined domain cobalt-based metal–organic frameworks (Co-MOF) precursor, thereby optimizing RuO2/Co3O4 interface. Due weakened self-sacrifice effect Co3O4, active heterogeneous electron interaction impeccable coating effect, OER stability RuO2/Co3O4–B3DC significantly improved compared while preserving intrinsic activity. Theoretical modeling suggests formation optimizes adsorption intermediates, process. Additionally, anode demonstrates promising potential application PEM electrolyzers variety renewable energy-driven electrolytic cells.
Language: Английский
Citations
8
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 3, 2024
Abstract Polymetallic oxides with extraordinary electrons/geometry structure ensembles, trimmed electron bands, and way‐out coordination environments, built by an isomorphic substitution strategy, may create unique contributing to concertedly catalyze water oxidation, which is of great significance for proton exchange membrane electrolysis (PEMWE). Herein, well‐defined rutile InSnRuO 2 density‐controllable oxygen vacancy (Ov)‐free polarons are firstly fabricated in situ substitution, using trivalent In species as Ov generators the adjacent metal ions donors form orderly concerted In‐Ov‐Ru‐O‐Sn substructures tetravalent oxides. For acidic obtained displays ultralow overpotential 183 mV (versus RHE) a mass activity (MA) 103.02 A mg Ru −1 , respectively. long‐term stability test PEMWE, it can run at low unchangeable cell potential (1.56 V) 200 h 50 mA cm −2 far exceeding current IrO ||Pt/C assembly 0.5 m H SO 4 . Accelerated degradation testing results PEMWE pure electrolyte show no significant increase voltage even when gradually increased from 1 5 The remarkably improved performance associated stabilized dense Ov‐electron polarons, synergistically activates band sites then boosting evolution kinetics. More importantly, self‐trapped polaron induces decrease entropy enthalpy, efficiently hinder atoms leaching increasing lattice atom diffusion energy barrier, achieves oxide. This work open door design next‐generation Ru‐based catalysts asymmetric active efficient electrocatalysis application.
Language: Английский
Citations
8
Journal of Materials Science, Journal Year: 2024, Volume and Issue: 59(23), P. 10193 - 10206
Published: June 1, 2024
Abstract An amphiphilic block copolymer, poly (styrene-2-polyvinyl pyridine-ethylene oxide), was used as a structure-directing and stabilizing agent to synthesize TiO 2 /RuO nanocomposite. The strong interaction of polymers with metal precursors led formation porous heterointerface . It acted bridge for electron transport, which can accelerate the water splitting reaction. Scanning microscopy, energy-dispersive X -ray spectroscopy, transmission diffraction analysis samples revealed successful fabrication nanocomposites. nanocomposites were measure electrochemical in three-electrode systems 0.1-M KOH. Electrochemical activities unveil that -150 displayed superior oxygen evolution reaction activity, having low overpotential 260 mV Tafel slope 80 mVdec −1 Graphical abstract
Language: Английский
Citations
6
Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(13), P. 11521 - 11540
Published: June 18, 2024
Proton exchange membrane water electrolysis (PEMWE) technology is seen as the most compatible hydrogen production with renewable energy generation. However, sluggish kinetics of anodic oxygen evolution reaction (OER) and scarcity acid-resistant, high-activity, low-cost catalysts have seriously hindered overall efficiency manufacturing costs PEMWE. Recently, ruthenium (Ru)-based materials gradually attracted attention due to their suitable binding strength toward intermediates lowest price in noble metal family. Herein, great achievements progress Ru-based acidic OER electrocatalysts are comprehensively reviewed, which started a general description mechanisms situ characterization techniques understand structure–activity relationships. Subsequently, some typical strategies enhance activity stability highlighted. Insights from synthesis methods, advanced characterizations, intermediate evolution, theoretical calculations provided, together our viewpoints on daunting challenges future endeavors for practical employment.
Language: Английский
Citations
6
Advanced Sustainable Systems, Journal Year: 2024, Volume and Issue: 8(11)
Published: July 9, 2024
Abstract Spinel metal oxides are extensively studied for supercapacitors (SCs) in alkaline electrolytes, where charge storage capacity is limited by surface site availability due to reconstruction forming hydroxides/oxyhydroxides. The use of an acidic medium, which can boost the spinel offering additional channel intercalation‐deintercalation protons, underexplored. Moreover, impact chemical compositions and cationic distributions crucial on electrocatalysis performance oxides, however, such a correlation first time reported properties ferrite NiFe 2 O 4 nanoparticles (NFO NPs). Besides, low‐cost scalable synthesis NFO NPs involving thermal decomposition Ni‐Fe glycolate, followed controlled air‐calcination reported. Thus crafted NPs‐based device shows impressive specific capacitance (2112 F g −1 at 10 A ) half‐cell configuration. flexible all‐solid‐state asymmetric (full‐cell) configuration depicts energy density (20.7 Wh kg ), power (4000 W gravimetric (140 retention its (≈75% after 10,000 charging/discharging cycles). results depict new insight toward tuning electronic NFO, otherwise predominately attributed only crystallite size morphological effects.
Language: Английский
Citations
6