Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 357, P. 124324 - 124324
Published: June 21, 2024
Language: Английский
Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(21)
Published: Feb. 2, 2024
Abstract Metal–support interaction (MSI) is witnessed as an essential manner to stabilize active metals and tune catalytic activity for heterogonous water splitting. Kinetically driving the electrolysis (WE) appeals a rational MSI system with coupled electron‐donating/accepting (e‐D/A) characters hydrogen/oxygen evolution reactions (HER/OER). However, metal stabilization effect by will in turn restrict deblocking of e‐D/A properties challenge full electrocatalytic optimization. This study profiles heterostructure featuring metastable Ru clusters on defective NiFe hydroxide (Ru/d‐NiFe LDH) support low‐precious (≈2 wt%) platform efficient WE. It indicated that interfacial oxygen vacancies can deviate stable 4d 5 orbit 2+δ state, regulate d‐band center levels toward facilitated HER/OER processes. Resultantly, Ru/d‐NiFe LDH attains ultralow overpotentials at 10 mA cm −2 Pt‐beyond alkaline HER (18 mV) OER (220 fast kinetics durability. The symmetrical electrolyzer delivers promising voltage 1.49 V 1 m KOH seawater splitting performance. work carries interesting opportunities rationalizing sophisticated metal‐support electrocatalysts through metal‐site metastabilization engineering.
Language: Английский
Citations
92
Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(30)
Published: May 27, 2024
Abstract Electrochemical water splitting is a promising technique for the production of high‐purity hydrogen. Substituting slow anodic oxygen evolution reaction with an oxidation that thermodynamically more favorable enables energy‐efficient Moreover, this approach facilitates degradation environmental pollutants and synthesis value‐added chemicals through rational selection small molecules as substrates. Strategies small‐molecule electrocatalyst design are critical to electrocatalytic performance, focus on achieving high current density, selectivity, Faradaic efficiency, operational durability. This perspective discusses key factors required further advancement, including technoeconomic analysis, new reactor system design, meeting requirements industrial applications, bridging gap between fundamental research practical product detection separation. aims advance development hybrid electrolysis applications.
Language: Английский
Citations
41
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(36)
Published: May 6, 2024
Abstract The electrooxidation of urea holds great potential for converting from wastewater into hydrogen, contributing to environmental protection and sustainable energy production. This necessitates the development highly efficient stable catalysts oxidation reaction (UOR). In this study, a NiCoCr‐LDH/NF (nickel‐cobalt‐chromium layered double hydroxide/nickel foam) electrode is successfully synthesized via simple hydrothermal method, demonstrating excellent electrocatalytic performance with low work 1.38 V at high current density 100 mA cm −2 . situ, Raman spectra analysis revealed that incorporation chromium (Cr) facilitated generation active γ‐NiOOH species catalyst reconstruction. Density functional theory (DFT) simulations confirmed lower formation due weakened interaction O─H bonds because narrow range hybridization between O‐2p z orbitals H‐1s orbitals. introduction Cr also improved adsorption molecules its intermediates, thereby enhancing overall activity UOR. With performance, unique electronic states, coordination structures, showcases practical applications in field catalysis.
Language: Английский
Citations
27
ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(3), P. 1029 - 1041
Published: Feb. 20, 2024
Substituting the oxygen evolution reaction by urea oxidation (UOR) is thermodynamically more favorable for energy-saving hydrogen production. However, UOR suffers from sluggish kinetics due to its complex six-electron transfer processes combined with conversion of complicated intermediates. Herein, LaNiO3–NiO heterojunctions successfully constructed accelerate UOR. Systematic experimental investigation and theoretical calculation endorse that self-driven local charge redistribution takes place at Janus LaNiO3/NiO interface, generating nucleophilic electrophilic regions. Such a unique structure targeted adsorption amino groups carbonyl groups, thus promoting rupture C–N bonds in urea. In addition, build-in electric field triggered heterojunction could effectively diminish stepwise energy barrier, accelerating desorption *CO2. As result, exhibits superior performance, delivering current density 10 mA cm–2 1.34 V (vs RHE). This work supplies valuable insights fundamental understanding rational construction efficient catalyst.
Language: Английский
Citations
20
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: April 15, 2024
Abstract Electrochemical ammonia synthesis (EAS) presents an attractive alternative to the Haber–Bosch process due benefits of energy saving, low carbon emission, environmental friendliness, and so on. However, competing hydrogen evolution reaction (HER) severely limits yield, selectivity, current efficiency NH 3 . Although accumulation self‐aggregation active (H*) are primary causes HER, it also serves as critical species intermediate for multistep hydrogenation deoxygenation processes. Therefore, sensible regulation H* generation consumption essential enhancing EAS performance. And is significant thoroughly review strategies control. Herein, a comprehensive introduction provide fundamental understanding its role in electrochemical reactions, including generation, conversion, identification, quantification protocols first proposed. In addition, control carefully summarized with particular focus on regulating enhance activity, Faradaic efficiency. Finally, remaining challenges perspectives discussed. This intended offer profound reactions development technology.
Language: Английский
Citations
17
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 487, P. 150447 - 150447
Published: March 15, 2024
Language: Английский
Citations
14
Matter, Journal Year: 2024, Volume and Issue: 7(9), P. 3189 - 3204
Published: June 21, 2024
Language: Английский
Citations
13
Nano Energy, Journal Year: 2024, Volume and Issue: 127, P. 109754 - 109754
Published: May 17, 2024
Language: Английский
Citations
11
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(22), P. 28625 - 28637
Published: May 20, 2024
Metal node engineering, which can optimize the electronic structure and modulate composition of poor electrically conductive metal–organic frameworks, is great interest for electrochemical natural seawater splitting. However, mechanism underlying influence mixed-metal nodes on electrocatalytic activities still ambiguous. Herein, a strategic design comprehensively demonstrated in mixed Ni Co metal redox-active centers are uniformly distributed within NH2–Fe-MIL-101 to obtain synergistic effect overall enhancement activities. Three-dimensional metallic MOF nanosheet arrays, consisting three different nodes, were situ grown foam as highly active stable bifunctional catalyst urea-assisted A well-defined NH2–NiCoFe-MIL-101 reaches 1.5 cm–2 at 360 mV oxygen evolution reaction (OER) 0.6 295 hydrogen (HER) freshwater, substantially higher than its bimetallic monometallic counterparts. Moreover, electrode exhibits eminent catalytic activity stability seawater-based electrolytes. Impressively, two-electrode alkaline electrolysis cell based needs only 1.56 yield 100 mA cm–2, much lower 1.78 V cells superior long-term current density 80 h.
Language: Английский
Citations
11
Fuel, Journal Year: 2024, Volume and Issue: 377, P. 132782 - 132782
Published: Aug. 14, 2024
Language: Английский
Citations
11