Bamboo fiber-derived carbon support for the immobilization of Pt nanoparticles to enhance hydrogen evolution reaction

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 684, P. 658 - 667

Published: Jan. 10, 2025

Language: Английский

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Recent Advances of the Effect of H₂O on VOC Oxidation over Catalysts: Influencing Factors, Inhibition/Promotion Mechanisms, and Water Resistance Strategies

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: 59(2), P. 1034 - 1059

Published: Jan. 6, 2025

Water vapor is a significant component in real volatile organic compounds (VOCs) exhaust gas and has considerable impact on the catalytic performance of catalysts for VOC oxidation. Important progress been made reaction mechanisms H2O water resistance strategies oxidation recent years. Despite advancements technology, most still exhibit low activity under humid conditions, presenting challenge reducing adverse effects To develop water-resistant catalysts, understanding mechanistic role implementing effective water-resistance with influencing factors are imperative. This Perspective systematically summarizes related research oxidation, drawing from over 390 papers published between 2013 2024. Five main proposed to clarify their H2O. inhibition/promotion introduced, elucidating various VOCs. Additionally, different kinds discussed, including fabrication hydrophobic materials, design specific structures morphologies, introduction additional elements catalyst modification. Finally, scientific challenges opportunities enhancing efficient practical applications purification highlighted.

Language: Английский

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Unraveling the Mechanism of Cu/CeO₂ Interface Modulation for CO₂ Electroreduction Into C₂₊/CH₄

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Abstract Cu shows unique characteristics for electrochemical CO 2 reduction reaction (CO RR) to hydrocarbons and oxygenates due the moderate adsorption energy of key intermediate *CO. However, it remains a challenge selectively control RR towards C 1 (e.g., CH 4 ) or 2+ H 5 OH) through simple interface engineering. Herein, series inverse catalysts, composed CeO nanoparticles over substrate (Cu‐CeO ‐x), are subtly designed tackle issues. It is verified decoration induces highly active Cu/CeO interfacial sites that enhance conversion *CO intermediates into , while conducive generation. With increase deposition, selectivity present volcano‐type increasing tendency with maximum faradic efficiency 62.6% 51.3%, respectively. In‐situ infrared spectroscopy theoretical calculations reveal loading allows cooperate efficiently promote coupling *CO/*CHO intermediates, thus enhancing selectivity. In contrast, excessive suppresses C─C but boosts unilaterally hydrogenation, promoting production. This work provides effective strategies regulate by modulating metal/oxide interfaces.

Language: Английский

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Highly Dispersed Ru‐Pt Heterogeneous Nanoparticles on Reduced Graphene Oxide for Efficient pH‐Universal Hydrogen Evolution

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 24, 2024

Abstract An efficient and stable electrocatalyst is key for the production of green hydrogen using water electrolysis. However, weak dissociation ability Pt‐based catalysts, resulting in slow kinetics severely hampers its applications alkali medium. Herein, a simple “coincident reduction” strategy reported to grow highly dispersed Ru‐Pt heterogeneous bimetallic nanoparticles on reduced graphene oxide (Ru x Pt y @rGO) pH‐universal evolution. Ru @rGO has superior catalytic activity at all pH values due synergistic effect between ultra‐small nanoparticle. In particular, catalyst with 13.6 wt% noble metal 1 2 low overpotentials 9, 6, 36 mV 10 mA cm −2 m KOH, 0.5 H SO 4 phosphate buffer solution (PBS), respectively, which outperformances monometallic counterparts comparable best catalysts ever reported. The because strong bonding nanoparticle rGO. Mechanism studies show that faster Volmer–Tafel mechanism alkali, high‐efficient + transfer increased adsorption acid, reaction kinetics. This work provides new route mass high‐performance practical values.

Language: Английский

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Refining Metal–Support Interactions via Surface Modification of Irreducible Oxide Support for Enhanced Complete Propane Oxidation

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(15), P. 11457 - 11467

Published: July 17, 2024

Regulating the metal–support interaction (MSI) of supported metal catalysts is critical to enhancing their catalytic performance. However, achieving direct control over MSI by tuning properties irreducible oxide-supported supports remains a challenging task. In this study, we propose surface modification strategy refine on an MgAl2O4-supported Pt catalyst. By employing facile H2O2 treatment modify support surface, number Brønsted acid sites MgAl2O4 was successfully reduced. The between and appropriately weakened, resulting in higher proportion metallic species, while maintaining high level dispersion during reaction. These species enhance activation ability C–H bonds propane facilitate rapid consumption intermediate species. Consequently, complete oxidation reaction performance H2O2-treated Pt/MgAl2O4 significantly promoted, exhibiting impressive increase intrinsic activity 32-fold compared traditional Pt/MgAl2O4.

Language: Английский

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Enhanced catalytic performance and N2 yield of Ag/CeO2 catalyst by Cu modification for NVOCs removal

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 488, P. 151117 - 151117

Published: April 8, 2024

Language: Английский

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Unravelling High Water Vapor-Induced Inhibitory Effects on Pt/Co₃O₄ Catalysts toward Benzene Oxidation

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(33), P. 15516 - 15526

Published: Aug. 5, 2024

Water vapor inevitably exists in the environment, which causes adverse impacts on many crucial chemical reactions. However, high water of up to 10 vol %─relevant a broad spectrum industrial practices-for catalytic implications has been less investigated or neglected. As such, we explored an industry-relevant, humidity-highly sensitive benzene oxidation only presence % using well-established Pt/Co

Language: Английский

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Mechanistic understanding of oxygen spillover enables efficient propane combustion over Pt/AlSOx catalyst

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 354, P. 129193 - 129193

Published: Aug. 15, 2024

Language: Английский

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Regulating Heteroatom Doping-Induced Embedded Pt-M Bimetallic Sites Coupled with Ce³⁺-OVs for Efficient Low-Temperature Methanol Steam Reforming

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 1002 - 1017

Published: Jan. 2, 2025

Platinum-based metal oxide catalysts confront huge challenges in achieving efficient low-temperature methanol steam reforming below 200 °C. Here, the highly dispersed (M) dopants coordinated with embedded Pt species at Pt-CeM (110) interface is exploited. This arrangement shortens geometric distance between and doped M atoms, enabling Pt-M coordination facilitating formation of atomically bimetallic sites on catalyst surface. unique structure promotes electron transfer across interfaces, intensifying Pt-support interactions that enhanced decomposition. Meanwhile, hydrogen spillover forms Ce3+-OVs pairs (where OV denotes an oxygen vacancy) activation stage, which H2O dissociation. Thus, proposed mechanisms suggest dual-function centers consisting Pt–M Ce3+-OVs, facilitated decomposition dissociation, respectively. process involved successive dehydrogenation followed by WGS reaction via *CO route, rate-determining step + *OH → *COOH being based DFT calculations. The optimal Pt-CeCo (H2) exhibited extremely low start-up temperature 140 °C a remarkable H2 production rate study presents approach for synthesizing active strong interfacial interactions, leading to development catalytic system reforming.

Language: Английский

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Macroporosity-Heightened Mass Transfer Enabling Complete Benzene Oxidation over Pt/SiO₂ Catalyst

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Mass transfer governs the overall catalytic performance of heterogeneous catalysts considerably; however, this fundamental research has often been ignored. Here, macroporous SiO2-supported Pt nanoparticle (Pt/SiO2-M) and mesoporous (Pt/SiO2-m) were specifically fabricated by a facile thermal reduction step to engineer resultant nanoparticles showing similar physiochemical properties while possessing completely different porous microstructures exclusively originating from SiO2 supports. On basis, platform explore crucial mass difference affecting activity is then established systematically practicing industry-important benzene oxidation measurements. State-of-the-art characterization techniques confirmed that all as-synthesized Pt/SiO2 indeed exhibited almost identical sites, excluding discrepancies raised nanoparticles. Importantly, Pt/SiO2-M displayed complete capabilities at lower temperature than for Pt/SiO2-m, accrediting macroporosity-induced faster desorption rate H2O CO2, thus making it capable enhancing high utilization sites. This work highlights importance improving capability toward supported nanoparticulate catalysts, demonstrating significance designing novel supports catalysis implications.

Language: Английский

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