Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(15), P. 4311 - 4318
Published: Jan. 1, 2024
Anchoring of NiCo x alloy nanoparticles onto nitrogen vacancy-rich carbon nitride nanotubes with porous structure was well designed toward promoting efficiently photocatalytic conversion CO 2 into solar fuels in the presence water vapor.
Language: Английский
Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 351, P. 123978 - 123978
Published: April 24, 2024
Language: Английский
Citations
30
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(13), P. 16601 - 16611
Published: March 19, 2024
Carbon Quantum dots (CQDs) are widely studied because of their good optical and electronic characteristics they can easily generate photocarriers. Nitrogen-doped CQDs (NCQDs) may exhibit improved hydrophilic, optical, electron-transfer properties, which conducive to photocatalytic hydrogen evolution. In this paper, NCQD-modified ZnS catalysts were successfully prepared. Under the irradiation full spectrum, H2 evolution rate optimal catalyst 0.25 wt % NCQDs/ZnS achieves 5.70 mmol g–1 h–1, is 11.88, 43.84, 5.14 times values (0.48 h–1), NCQDs (0.13 CQDs/ZnS (1.11 respectively. Furthermore, it shows stability, indicating that modification prevents photocorrosion oxidation ZnS. The enhanced performance due NCQD loading, promotes separation photogenerated carriers, optimizes structures, increases specific surface area. This work highlights fact afford a new strategy synthesize ZnS-based photocatalysts with production performance.
Language: Английский
Citations
20
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(18)
Published: March 6, 2024
Solar-energy-driven photoreduction of CO
Language: Английский
Citations
19
ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(11), P. 8116 - 8129
Published: May 9, 2024
The PtIn nanoalloys with high surface energy are generally in a metastable state during harsh reaction conditions, and the ordered alloy structure is not conducive to exposure of Pt active sites. Herein, strategy for restructuring unfavorable via heteroatom (Ce) doping applied advance an isolated Ptδ+ confined by InCeOx nanoislands supported on SiO2. as-synthesized catalyst optimizing PtIn(Ce) ternary components exhibits ∼92.2% selectivity toward propylene stable propane conversion ∼67.1% at 550 °C (kd 0.010 h–1). As demonstrated comprehensive characterizations, introduced proper amount Ce species leads reorganization disadvantaged nanoalloy into robustness site inhibiting In0 generation. modulate electronic interaction between Pt, In, carrier, stimulating capability activate reactive molecules same time acting as spatial physical barriers restrict migration species. This work proposed facile efficient promote against sintering coking Pt-based dehydrogenation.
Language: Английский
Citations
19
Small, Journal Year: 2024, Volume and Issue: 20(32)
Published: March 15, 2024
Abstract Solar‐driven carbon dioxide (CO 2 ) methanation holds significant research value in the context of emission reduction and energy crisis. However, this eight‐electron catalytic reaction presents substantial challenges activity selectivity. In regard, researchers have conducted extensive exploration achieved developments. This review provides an overview recent advances efficient selective photocatalytic CO methanation. It begins by discussing fundamental principles detail, analyzing strategies for improving efficiency conversion to CH 4 comprehensively. Subsequently, it outlines applications advanced characterization methods Finally, highlights prospects opportunities area, aiming inspire into high‐value shed light on mechanisms.
Language: Английский
Citations
17
Small, Journal Year: 2023, Volume and Issue: 20(21)
Published: Dec. 10, 2023
Abstract To address charge recombination in photocatalysis, the prevalent approach involves use of noble metal cocatalysts. However, precise factors influencing this performance variability based on cocatalyst selection have remained elusive. In study, CdS hollow spheres loaded with distinct nanoparticles (Pt, Au, and Ru) are investigated by femtosecond transient absorption (fs‐TA) spectroscopy. A more pronounced internal electric field leads to creation a larger Schottky barrier, order Pt‐CdS > Au‐CdS Ru‐CdS. Owing these varying barrier heights, interface electron transfer rate ( K e ) efficiency η metal‐CdS acetonitrile (ACN) exhibit following trend: Ru‐CdS Pt‐CdS. trends for water different (Ru‐CdS Au‐CdS) due influence water, leading consumption photogenerated electrons affecting metal/CdS state. Although displays highest , its overall photocatalytic performance, particularly H 2 production, lags behind that backflow from Ru CdS. This work offers fresh perspective origin differences provides valuable insights design construction.
Language: Английский
Citations
28
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 6, 2024
Abstract Photocatalytic CO 2 reduction reaction (CO RR) into high‐value‐added fuels has received significant attention, yet multiple electron and proton processes involved in RR result low selectivity. Herein, a strategy involving oxygen vacancies (Ovs)‐enriched Bi MoO 6 coated on ZIF‐67‐derived Co 3 O 4 to construct well‐defined core‐shell nanocage is developed, which drives effective photoconversion CH with nearly 100% selectivity high apparent quantum efficiency of 2.5% at 420 nm pure water under simulated irradiation. Theoretical calculations experiments exhibit that the potential difference stemming from built‐in electric field provides guarantee for occurring H oxidation set . Numerous exposed Ovs formed Bi─O bond by ethylene glycol mediated approach promotes adsorption charge separation efficiency, can optimize kinetics thermodynamics, facilitating hydrogenation key intermediate *CO generate This work new controlled vacancy generation photocatalysts achieve high‐performance methanation.
Language: Английский
Citations
13
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 27, 2024
Abstract Photocatalytic CO 2 reduction serves as an important technology for value‐added solar fuel production, however, it is generally limited by interfacial charge transport. To address this limitation, a two‐dimensional/two‐dimensional (2D/2D) p‐n heterojunction CuS‐Bi WO 6 (CS‐BWO) with highly connected and matched lattices was designed in work via two‐step hydrothermal tandem synthesis strategy. The integration of CuS BWO created robust interface electric field provided fast transfer channels due to the function difference, well lattices. combination promoted electron from Cu Bi sites, leading coordination sites high electronic density low oxidation state. nanosheets facilitated adsorption activation , generation high‐coverage key intermediate b‐CO 3 2− while (CS) acted broad light‐harvesting material provide abundant photoinduced electrons that were injected into conduction band photoreduction reaction. Remarkably, CS‐BWO exhibited average CH 4 yields 33.9 16.4 μmol g −1 h respectively, which significantly higher than those CS, BWO, physical mixture samples. This innovative design strategy developing high‐activity photocatalyst converting fuels.
Language: Английский
Citations
8
Langmuir, Journal Year: 2024, Volume and Issue: 40(12), P. 6330 - 6341
Published: Feb. 16, 2024
CO2 photoreduction using a semiconductor-based photocatalyst is promising option for completing new carbon–neutral cycle. The short lifetime of charges generated owing to light energy one the most critical problems in further improving performance photocatalysts. This study shows structure, electron transmission, and stability Ti3C2Xy (X = oxo, OH, F, or Cl) MXene combined with ZrO2 photocatalyst. Using H2 as reductant, photocatalytic CO formation rate increased by 6.6 times 4.6 μmol h–1 gcat–1 (3.0 wt %)–ZrO2 compared that ZrO2, catalytic route was confirmed 13CO2 form 13CO. In clear contrast, H2O (gas) CH4 formed major product (5.0 at 3.9 gcat–1. H2O, 12CH4, 12C2H6, 12C3H8 were besides H212CO, demonstrating C source partial decomposition hydrogenation Ti3C2Xy. atomic force high-resolution microscopies, 1.6 nm thick sheets observed, suggesting ∼3 stacked layers are consistent Ti–C Ti···Ti interatomic distances 0.218 0.301 nm, respectively, forming [Ti6C] octahedral coordination, component X ligand suggested be F OH/oxo, temperature increasing 116 K higher absorbed energy, all based on extended X-ray absorption fine structure analysis.
Language: Английский
Citations
6
ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(15), P. 17406 - 17416
Published: July 24, 2024
Converting CO2 into useful chemicals or fuels through photocatalysis makes an important contribution to mitigating energy shortages and climate change. Effective separation of photogenerated charges, as well related surface states, plays a crucial role in semiconductor photocatalytic systems for efficient reduction. In this research, enhance the performance In2O3 on reduction, we prepared unique N-doped double-shell hollow dodecahedrons coupled with Au Co3O4 dual-cocatalysts (Au/N–In2O3/Co3O4). The experimental analysis showed that dual-cocatalysts, structure, oxygen vacancies induced by N-doping can greatly achieve charge separation/utilization efficiency increase active sites, visible light absorption, adsorption capacity. synergy these positive factors optimized hybrid catalyst exhibit enhanced activity, average yields CO CH4 under simulated solar irradiation were 96.1 19.9 μmol h–1 g–1, respectively, which approximately twice high pure In2O3. This work reports feasible strategy establishing In2O3-involved excellent reduction system.
Language: Английский
Citations
6