International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 90, P. 1333 - 1343
Published: Oct. 11, 2024
Language: Английский
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(28)
Published: March 29, 2024
Abstract The effectuation of pH‐universal electrocatalysis is highly attractive but still challenging for the hydrogen evolution reaction (HER). It appeals not only facilitated electron transport also kinetical proton mass transfer. In this study, a via‐hole Ru/MoO 2 confined heterostructure profiled as metal‐support platform electron/mass transfer‐boosted HER studies. indicated that as‐formed Ru─O─Mo bridge can modulate electronic at interface, and adsorption transfer are kinetically derived by intensified metallic Ru─Ru bond. Resultantly, stably attains Pt‐beyond activity with an ultralow overpotential 9.2 mV 10 mA cm −2 in 1 m KOH, achieves competitive stability acidic/neutral electrolytes. Both experimental computational results reveal accelerated kinetics attributable to intensive through interfacial Ru→MoO spillover effect. This work opens up opportunities rationalize advanced electrocatalysts effect bond engineering.
Language: Английский
Citations
58
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: June 10, 2024
Abstract The rationalization of pH‐robust catalysis is highly desired but challengeable for overall water electrolysis (WE). It requests a metal active site that can make an efficient adaption with both cathodic hydrogen and anodic oxygen evolution reactions (HER/OER). Herein, RuO 2‐x /RuSe 2 heterostructure electrocatalyst profiled interfacial Se─Ru─O bridge the splitting studies. An asymmetric bond delta‐polarization (Δp) found at bridge, including Δp > 0 Ru─O part < Ru─Se side by experiment calculation results. enlarged polarizability (Δp 0) in principle trigger lattice mediated (LOM) pathway OER; meanwhile, reduced benefit HER due to strengthened d‐p band hybridization. Resultantly, deliver ultralow overpotentials 25/10 mV Pt‐beyond 210/255 OER 10 mA cm −2 acidic/alkaline media, respectively. In especial, acidic WE be stably operated 200 h low cell voltage 1.478 V . This research clarifies polarization as criterion rational design catalysts.
Language: Английский
Citations
40
Chemical Society Reviews, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
This review focuses on the synthesis and characterization of defective electrocatalysts, internal correlation between defects catalytic activity, development application electrocatalysts in various fields.
Language: Английский
Citations
23
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 19, 2025
Abstract Efficient charge separation at the semiconductor/cocatalyst interface is crucial for high‐performance photoelectrodes, as it directly influences availability of surface charges solar water oxidation. However, establishing strong molecular‐level connections between these interfaces to achieve superior interfacial quality presents significant challenges. This study introduces an innovative electrochemical etching method that generates a high concentration oxygen vacancy sites on BiVO 4 surfaces (Ov‐BiVO ), enabling interactions with oxygen‐rich ligands MIL‐101. reduces formation energy and promotes conformal growth . The Ov‐BiVO /MIL‐101 composite exhibits ideal interface, achieving impressive photocurrent density 5.91 mA cm −2 1.23 V RHE , along excellent stability. high‐performing photoanode enables unbiased tandem device /MIL‐101‐Si cell system, solar‐to‐hydrogen efficiency 4.33%. integration mitigates states enhances internal electric field, facilitating migration photogenerated holes into MIL‐101 overlayer. process activates highly efficient Fe catalytic sites, which effectively adsorb molecules, lowering barrier oxidation improving kinetics. Further studies confirm broad applicability vacancy‐induced molecular epitaxial in various MOFs, offering valuable insights defect engineering optimizing enhancing photocatalytic activity.
Language: Английский
Citations
4
Advanced Science, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 15, 2025
Abstract Development of high‐performance electrocatalysts for water splitting is crucial a sustainable hydrogen economy. In this study, rapid heating ruthenium(III) acetylacetonate by magnetic induction (MIH) leads to the one‐step production Ru‐RuO₂/C nanocomposites composed closely integrated Ru and RuO₂ nanoparticles. The formation Mott‐Schottky heterojunctions significantly enhances charge transfer across Ru‐RuO 2 interface leading remarkable electrocatalytic activities toward both evolution reaction (HER) oxygen (OER) in 1 m KOH. Among series, sample prepares at 300 A 10 s exhibits best performance, with an overpotential only −31 mV HER +240 OER reach current density mA cm⁻ . Additionally, catalyst demonstrates excellent durability, minimal impacts electrolyte salinity. With as bifunctional catalysts overall splitting, ultralow cell voltage 1.43 V needed , 160 lower than that commercial 20% Pt/C RuO₂/C mixture. These results highlight significant potential MIH ultrafast synthesis electrochemical from seawater.
Language: Английский
Citations
3
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 8, 2025
Abstract Oxygen vacancy (V O ) engineering is widely regarded as a key strategy for enhancing CoMo‐based catalysts oxygen evolution reaction (OER) while understanding their formation mechanisms and role in boosting OER activity remains significant challenge. Herein, CoMoO x system doped developed with different 3 d ‐orbital atoms M (V, Ni, Zn, Mn) to investigate the construction stabilization of V its crucial performance. In situ ex measurements along theoretical calculations demonstrate that doping adjusts bandgap between CoMo‐ ‐p orbitals, leading transfer electrons from O‐ p orbitals M‐ thereby promoting . The leads an upshifted ‐band center, optimizing desorption intermediates on ‐CoMoVO lowering energy barrier rate‐determining step (RDS), catalyst's activity. Additionally, promotes electron Co atoms, stabilizing ultimately improving stability. resulting catalyst delivered attractive (overpotential 248 mV at 10 mA cm −2 durability over 600 h. This study offers rational method designing efficient electrocatalysts.
Language: Английский
Citations
2
Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 688, P. 106 - 117
Published: Feb. 21, 2025
Language: Английский
Citations
2
Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(29)
Published: May 25, 2024
Abstract Efficient and durable electrocatalysts toward alkaline hydrogen evolution reaction (HER) are of great significance for the widespread application anion‐exchange membrane water electrolyzer (AEMWE). Numerous single‐phase catalysts, such as Ru 2 P, have been explored efficient HER catalysts; however, many failed to overcome inherent sluggish kinetics two separate steps involved in HER: dissociation production. In this study, density functional theory calculations conducted identify promising combinations Ir P materials that promote fast cascade H production via kinetically favorable spillover from surface adjacent P. An unprecedented construction cluster‐decorated hollow nanotubes ( c ‐RP/IP HNTs), which feature a cooperative heterostructural synergy developed. This configuration shows greater performance than commercial Pt/C, achieving an overpotential 23.2 mV at 10 mA cm − maintaining long‐term stability 55 h half‐cell tests. Furthermore, practical AEMWE test, incorporating HNTs, demonstrated remarkable single‐cell 12.23 A −2 2.0 V operated stably under 1.0 over 250 h. surpasses state‐of‐the‐art proton‐exchange WE.
Language: Английский
Citations
15
Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(38)
Published: July 11, 2024
Abstract Electrocatalytic oxidation of 5‐hydroxymethylfurfural (HMFOR) is an effective route to produce value‐added chemicals with low energy consumption. In this work, efficient electrocatalysts are prepared by varying the amount Ce doping and CeO 2 modification on NiFe layered double hydroxide (NiFe–LDH) nanosheets supported carbon cloth (CC). Through heterogeneous interface construction, electronic structure coordination chemistry NiFe–LDH greatly changed. Compared synergistic effect Ce‐doping modification, CC@NiFeCe(3%)‐LDH only show excellent charge transfer ability, higher HMF conversion (95.73%), 2,5‐furandicarboxylic acid (FDCA) selectivity (93.31%), Faraday efficiency (99.47%) at 1.44 V RHE . Density‐functional theory calculations X‐ray fine spectroscopy demonstrate that doping, compared their effects, significantly facilitates electron transport optimizes intermediate adsorption effectively lowering activation for transformation 5‐formyl‐2‐furancarboxylic (FFCA) encourage FFCA FDCA. Overall, work systemically investigates HMFOR behaviors CC@NiFe–LDH under synergetic effect, which provides some guidance development high‐performance performance.
Language: Английский
Citations
14
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154093 - 154093
Published: July 17, 2024
Language: Английский
Citations
13