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hydrogenproduction, etc ; absorption; nanosheets; photocatalysis; photocatalysts; van der Waals forces; Show all 6 Subjects
Abstract:
... Currently, two-dimensional/two-dimensional (2D/2D) van der Waals heterojunctions, as novel and excellent candidates for photocatalysts, have attracted significant attention because of their fundamentally improved interfacial charge separation/transfer and massive reactive centers. Herein, novel 2D/2D Ta₃N₅-nanosheet/ReS₂-nanosheet van der Waals heterojunction photocatalysts are rationally designed ...
hydrogenproduction, etc ; activation energy; carbon; catalytic activity; electrolysis; hydrogen; industry; platinum; Show all 8 Subjects
Abstract:
... Alkaline water electrolysis is a safe and efficient method for producing hydrogen that is favored by the industry. At present, single-atom catalysts have attracted extensive attention due to their extremely high atom utilization. However, studies on the single-atom site catalytic mechanism of the Volmer step, the rate-determining step of the cathodic HER reaction, are lacking. Here, we used ZIF-8 ...
hydrogenproduction, etc ; Clostridium; butyrates; citrates; environment; fermentation; ferric hydroxide; gene expression regulation; glucose; Show all 9 Subjects
Abstract:
... Clostridium sp. LQ25 was cultured in different forms of ferric (ferric citrate and ferric hydroxide) as electron acceptors to investigate growth, ferric reduction, hydrogen production, fermentation products and fermentation process. The growth of the strain LQ25 detected by protein was 82.8 ± 2.1 mg/L and 73.5 ± 1.7 mg/L using ferric citrate and ferric hydroxide as electron acceptors, which was 33 ...
hydrogenproduction, etc ; disulfides; electron transfer; energy; hydrogen; irradiation; nanosheets; photocatalysis; solar energy; thermodynamics; Show all 10 Subjects
Abstract:
... Two-dimensional transition metal disulfides are excellent photocatalytic materials, which can be significantly improved by optimizing the composition and structure. Herein, Mn-doping NiS₂ of (Ni₁₋ₓMnₓ)-S with various Ni/Mn molar ratios is proposed via a facile and low-cost solvothermal method. The optimal (Ni₄/₆Mn₂/₆)-S exhibits pinecone-like morphology composed of tiny nanosheets with enlarged ac ...
hydrogenproduction, etc ; density functional theory; electric potential difference; nanoparticles; nanorods; oxidation; oxygen production; urea; Show all 8 Subjects
Abstract:
... Electrocatalytic urea oxidation (UOR) has attracted significant interest as a promising anodic half-reaction to replace sluggish oxygen evolution reaction (OER) toward water splitting. However, the activation and decomposition of urea molecule maintains a challenge during electrocatalytic process because of its 6e⁻ oxidation procedure. Herein, Ni nanoparticles decorated NiMoOₓ nanorod (Ni/NiMoOₓ) ...
hydrogenproduction, etc ; Escherichia coli; fermentation; formate dehydrogenase; formates; formic acid; hydrogen; mutation; oxidation; phenotype; quinones; Show all 11 Subjects
Abstract:
... Formate hydrogenlyase-1 (FHL-1) is a complex-I-like enzyme that is commonly found in gram-negative bacteria. The enzyme comprises a peripheral arm and a membrane arm but is not involved in quinone reduction. Instead, FHL-1 couples formate oxidation to the reduction of protons to molecular hydrogen (H₂). Escherichia coli produces FHL-1 under fermentative conditions where it serves to detoxify formi ...
hydrogenproduction, etc ; catalysts; catalytic activity; electric potential difference; electrolysis; geometry; nitrides; oxygen production; ruthenium; temperature; Show all 10 Subjects
Abstract:
... Noble metal-based materials are the benchmark catalysts for electrocatalysis, but their wide applications are hindered due to their scarcity and high cost. Developing a feasible strategy to achieve higher catalytic activity with low usage of noble metals is vital and urgent. Herein, a simple nitridation route is proposed to design a hybrid material with both ruthenium (Ru) species and mixed metal ...
hydrogenproduction, etc ; carbon nitride; density functional theory; energy; graphene; hydrogen; photocatalysis; photocatalysts; polymerization; urea; wavelengths; Show all 11 Subjects
Abstract:
... As an efficient photocatalyst, graphitic carbon nitride (g-C₃N₄) has been widely used in the field of photocatalytic hydrogen production. However, how to prepare hydrogen efficiently and stably has become a challenge. Herein, we successfully realize metal-free edge modification with phenyl groups by one-step thermal polymerization of urea with 4-phenyl-3-thiosemicarbazide. Consequently, the optima ...
hydrogenproduction, etc ; adsorption; cobalt; density functional theory; electric potential difference; mass transfer; nanosheets; nitrogen; oxygen production; vanadium; Show all 10 Subjects
Abstract:
... Developing high-activity, long-durability, and noble metal-free oxygen evolution (OER) and hydrogen evolution (HER) cocatalysts are the bottlenecks for efficient overall water splitting (OWS). Here, novel cobalt vanadium oxides doped by nitrogen were synthesized by nitriding Co₂V₂O₇@NF precursor at 300–450 °C for OER and HER reactions. N-Co₂V₂O₇@NF (350 °C) and N-Co₂VO₄/VO₂@NF (400 °C) show remark ...
hydrogenproduction, etc ; X-radiation; absorption; adsorption; carbon; catalysts; corrosion; desorption; electron transfer; energy; liquids; nanosheets; pH; pyrolysis; seawater; Show all 15 Subjects
Abstract:
... Nanostructured electrocatalysts with unique surfaces and interfaces for hydrogen evolution reaction (HER) are crucial for achieving high performance in universal pH water and natural seawater. Herein, a supramolecular liquid precursor was designed and applied to grow NiₓCo₄₋ₓN/N-doped carbon (NC) ultrathin nanosheet arrays (NiₓCo₄₋ₓN/NC) on carbon cloth through one-step pyrolysis. According to the ...
... The impact of antibiotics on the environmental protection and sludge treatment fields has been widely studied. The recovery of hydrogen from waste activated sludge (WAS) has become an issue of great interest. Nevertheless, few studies have focused on the impact of antibiotics present in WAS on hydrogen production during dark anaerobic fermentation. To explore the mechanisms, sulfamethoxazole (SMX) ...
... Bioelectrochemical hydrogen production via microbial electrolysis cells (MECs) has attracted attention as the next generation of technology for the hydrogen economy. MECs work by electrochemically active bacteria reducing organic compounds at the anode. However, the hydrophobic nature of carbon-based anodes suppresses the release of the produced gas and water penetration, which significantly reduc ...
hydrogenproduction, etc ; carbon nitride; catalytic activity; chemical reduction; electrochemistry; electrodes; graphene; graphene oxide; hydrogen; nanocomposites; nanosheets; oxidation; ruthenium; spectroscopy; Show all 14 Subjects
Abstract:
... Design and engineering of effective electrode catalysts represents a critical first step for hydrogen production by electrochemical water splitting. Nanocomposites based on ruthenium atomically dispersed within a carbon scaffold have emerged as viable candidates. In the present study, ruthenium metal centers are atomically embedded within graphitic carbon nitride/reduced graphene oxide nanosheets ...
hydrogenproduction, etc ; anion-exchange membranes; bioanodes; chemical oxygen demand; desalination; electrodialysis; electron microscopy; environment; microbial growth; pH; viability; wastewater treatment; Show all 12 Subjects
Abstract:
... Microbial electrodialysis cells (MEDCs) offer simultaneous wastewater treatment, water desalination, and hydrogen production. In a conventional design of MEDCs, the overall performance is retarded by the accumulation of protons on the anode due to the integration of an anion exchange membrane (AEM). The accumulation of protons reduces the anolyte pH to become acidic, affecting the microbial viabil ...
hydrogenproduction, etc ; activation energy; ambient temperature; cleavage (chemistry); electric potential difference; electric power; electrodes; electrolysis; foams; nanomaterials; oxidation; oxygen production; urea; Show all 13 Subjects
Abstract:
... It is urgent to develop non-noble metal electrocatalysts with both excellent activity and durable stability for H₂ production via water electrolysis. Electric energy is mainly consumed by the sluggish anodic oxygen evolution reaction (OER). The electrocatalytic urea oxidation reaction (UOR) has been regarded as a promising reaction to replace OER because of its small thermodynamic oxidation potent ...
hydrogenproduction, etc ; X-ray photoelectron spectroscopy; absorption; coordination polymers; electrochemistry; energy conversion; hydrogen; light; lighting; oxygen; photocatalysis; photocatalysts; photolysis; pollutants; tetracycline; zirconium; Show all 16 Subjects
Abstract:
... In the existing eco-crisis, designing and engineering an efficient as well as water stable photocatalyst for energy conversion and pollutant abatement remains crucial. In this regard, a mixed linker type zirconium metal organic framework (Zr-MOF) with terepthalic acid based ditopic linkers were utilized to design a single component photocatalyst through single step solvothermal method to utilize p ...
hydrogenproduction, etc ; absorption; adsorption; carbon; density functional theory; electrolytes; energy; hydrophilicity; hydroxymethylfurfural; liquids; nanowires; nickel; oxidation; phosphides; phosphorus; pyrolysis; solar collectors; solar radiation; Show all 18 Subjects
Abstract:
... Multiple surface/interface engineering is an effective approach to develop efficient electrocatalysts for promoting the practical application of electrocatalysis and achieving carbon neutrality. Herein, a deep eutectic liquid precursor containing phosphorus was designed. The self-supported three-dimensional (3D) cobalt-doped Ni₁₂P₅/Ni₃P nanowire networks coated with a thin layer of carbon (Co-NiₓP ...
hydrogenproduction, etc ; adsorption; catalytic activity; electric potential difference; electrical conductivity; electrochemistry; electrodes; electrolysis; energy conversion; foams; hydrophilicity; industrial applications; mass transfer; nanosheets; nickel; oxygen production; Show all 16 Subjects
Abstract:
... Alkaline water electrolysis (AWE) offers a promising route for green hydrogen production. However, its industrial application is impeded by unsatisfactory energy conversion efficiency. Herein, a robust electrode composed of porous nickel foam (PNF) and Fe-doped Ni₃S₂ (Fe-Ni₃S₂) nanosheet arrays was fabricated and applied for industrial AWE. By conducting a scalable dynamic bubble-template method, ...
hydrogenproduction, etc ; catalysts; catalytic activity; Show all 3 Subjects
Abstract:
... Two-dimensional Ti₃C₂Tₓ MXenes have attracted significant interest as low-cost supports to anchor single atoms owing to their unique properties. Nevertheless, there is still a lack of systematic investigation on the coordinative interaction between single atoms and functionalized MXene. Herein, we construct a novel catalyst consisting of Ir single atoms confined in porous heteroatom (N, S) co-dope ...
Lisi Xie; Qian Liu; Shengjun Sun; Long Hu; Longcheng Zhang; Donglin Zhao; Qin Liu; Jie Chen; Jun Li; Ling Ouyang; Abdulmohsen Ali Alshehri; Mohamed S. Hamdy; Qingquan Kong; Xuping Sun
hydrogenproduction, etc ; ammonia; carbon; electrosynthesis; Show all 4 Subjects
Abstract:
... Ambient ammonia synthesis by electroreduction of nitrate (NO₃–) provides us a sustainable and environmentally friendly alternative to the traditional Haber–Bosch process. In this work, Mn₂CoO₄ nanoarray grown on carbon cloth (Mn₂CoO₄/CC) serves as a superior electrocatalyst for efficient NH₃ synthesis by selective reduction of NO₃–. When operated in 0.1 M PBS with 0.1 M NaNO₃, Mn₂CoO₄/CC reaches a ...