Microwave Synthesis of Pt Clusters on Black TiO₂ with Abundant Oxygen Vacancies for Efficient Acidic Electrocatalytic Hydrogen Evolution

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(14)

Published: Feb. 9, 2023

Oxygen vacancies-enriched black TiO2 is one promising support for enhancing hydrogen evolution reaction (HER). Herein, oxygen vacancies enriched supported sub-nanometer Pt clusters (Pt/TiO2 -OV ) with metal interactions designed through solvent-free microwave and following low-temperature electroless approach the first time. High-temperature strong reductants are not required then can avoid aggregation of decorated species. Experimental theoretical calculation verify that created exhibit synergistic effects optimizing kinetics. Based on it, Pt/TiO2 presents remarkable electrocatalytic performance 18 mV to achieve 10 mA cm-2 coupled small Tafel slope 12 dec-1 . This work provides quick synthetic strategy preparing titanium dioxide based nanomaterials.

Language: Английский

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Synthesis and modification strategies of g-C3N4 nanosheets for photocatalytic applications

Advanced Powder Materials, Journal Year: 2023, Volume and Issue: 3(1), P. 100150 - 100150

Published: July 5, 2023

Graphitic carbon nitride nanosheets (CNNs) become the most promising member in family benefitted from their two-dimensional structural features. Recently, great endeavors have been made synthesis and modification of CNNs to improve photocatalytic properties, many exciting progresses gained. In order elucidate fundamentals based catalysts provide insights into rational design photocatalysis system, we describe recent progress preparation strategies applications this review. Firstly, physicochemical properties are briefly introduced. Secondly, approaches reviewed, including top-down stripping (thermal, gas, liquid, composite stripping) bottom-up precursor molecules (solvothermal, template, supramolecular self-assembly method). Subsequently, on years discussed, crystal structure design, doping, surface functionalization, constructing 2D heterojunction, anchoring single-atom. Then multifunctional g-C3N4 nanosheet materials H2 evolution, O2 overall water splitting, H2O2 production, CO2 reduction, N2 fixation, pollutant removal, organic synthesis, sensing highlighted. Finally, opportunities challenges for development high-performance systems also promising.

Language: Английский

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Carbon quantum dots-modified tetra (4-carboxyphenyl) porphyrin/BiOBr S-scheme heterojunction for efficient photocatalytic antibiotic degradation

Science China Materials, Journal Year: 2024, Volume and Issue: 67(2), P. 562 - 572

Published: Jan. 23, 2024

Language: Английский

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Preparation of photocatalysts decorated by carbon quantum dots (CQDs) and their applications: A review

Journal of environmental chemical engineering, Journal Year: 2023, Volume and Issue: 11(2), P. 109487 - 109487

Published: Feb. 13, 2023

Language: Английский

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Nanoarchitectonics of Metallene Materials for Electrocatalysis

ACS Nano, Journal Year: 2023, Volume and Issue: 17(14), P. 13017 - 13043

Published: June 27, 2023

Controlling the synthesis of metal nanostructures is one approach for catalyst engineering and performance optimization in electrocatalysis. As an emerging class unconventional electrocatalysts, two-dimensional (2D) metallene electrocatalysts with ultrathin sheet-like morphology have gained ever-growing attention exhibited superior electrocatalysis owing to their distinctive properties originating from structural anisotropy, rich surface chemistry, efficient mass diffusion capability. Many significant advances synthetic methods electrocatalytic applications 2D metallenes been obtained recent years. Therefore, in-depth review summarizing progress developing electrochemical highly needed. Unlike most reported reviews on metallenes, this starts by introducing preparation based classification metals (e.g., noble metals, non-noble metals) instead methods. Some typical strategies preparing each kind are enumerated detail. Then, utilization applications, especially conversion reactions, including hydrogen evolution reaction, oxygen reduction fuel oxidation CO2 N2 comprehensively discussed. Finally, current challenges opportunities future research energy proposed.

Language: Английский

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Insights into atomically dispersed reactive centers on g-C3N4 photocatalysts for water splitting

Advanced Powder Materials, Journal Year: 2022, Volume and Issue: 2(2), P. 100094 - 100094

Published: Oct. 1, 2022

Co-catalysts decorations provide unique opportunity in promoting the photocatalytic water splitting performance of graphite carbon nitride (g-C3N4) system, while mechanistic understanding this complex catalytic network remains elusive. Here, taking single-atom-based photocatalysts (M1-g-C3N4) as an unprecedented simplified model we theoretically tracked kinetics for a comprehensive process and afforded descriptor αS1-T1/αT1-S0 (ratio extent S1-T1 T1-S0 state mixing) ΔGH∗ (hydrogen adsorpti on free energy) rational screening photocatalysts. The targeted Fe1-g-C3N4 yields excellent H2 evolution rate (ca. 3.2 ⋅mmol·gcat−1·h−1 under full arc), two order magnitude improvement relative to pristine g-C3N4 counterpart also outperforms other representative 3d-transition-metal-based This work presents essential role isolated atomic sites course sheds light design from both photophysical photochemical aspects.

Language: Английский

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Microwave Phosphine‐plasma Assisted Ultrafast Synthesis of Halogen‐doped Ru/RuP₂ with Surface Intermediate Adsorption Modulation for Efficient Alkaline Hydrogen Evolution Reaction

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(13)

Published: Dec. 16, 2023

Anionic modification engineering is a crucial approach to develop highly efficient electrocatalysts for hydrogen evolution reaction. Herein, halogen elements (X = Cl, Br, and I)-modified Ru-based nanosheets (X-Ru/RuP

Language: Английский

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Selective conversion of CO₂ to CH₄ enhanced by WO₃/In₂O₃ S-scheme heterojunction photocatalysts with efficient CO₂ activation

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(27), P. 14860 - 14869

Published: Jan. 1, 2023

Novel WO 3 /In 2 O S-scheme heterojunctions unveiled enhanced CO photoreduction performance with ∼53.7% CH 4 selectivity, attributing to unique charge separation and efficient activation.

Language: Английский

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Bound-state electrons synergy over photochromic high-crystalline C3N5 nanosheets in enhancing charge separation for photocatalytic H2 production

Advanced Powder Materials, Journal Year: 2024, Volume and Issue: 3(4), P. 100202 - 100202

Published: April 16, 2024

Language: Английский

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Emerging Photoreforming Process to Hydrogen Production: A Future Energy

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(40)

Published: April 16, 2024

Abstract In the quest of renewable energy technologies, solar photoreforming emerges as one affordable yet challenging process for converting biomass into hydrogen, hydrocarbon fuels, and chemicals. This review highlights state‐of‐the‐art photoreforming, elucidating its underlying mechanisms conversion dissipated polymers H 2 valuable Biomass feedstocks such carbohydrates, agricultural residues, glycopolymers, food wastes, waste plastics are evaluated based on their chemical composition, content, sustainability aspects, exploring selection appropriate bio‐renewable resources, considering abundance, availability, potential hydrogen production. The impact diverse parameters efficiency is explored, encompassing factors like reaction temperature, pH, catalyst loading, reactor design, solvent effect, light intensity across various sacrificial substrates. discussion also considers correlation with production rate, selectivity, efficiency. buckles design synthesis functional photocatalysts biomass‐derived feedstock, highlighting photocatalytic (PC) properties in reforming processes related feedstock chemicals biofuel. delves pathways future advancements including artificial intelligence (AI) machine learning (ML), alongside addressing challenges insightful perspectives within this evolving field green energy.

Language: Английский

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