Catalysts
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2025
·Vol. 15
·期 11
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IF 4
Juan Du,Wanting Qiu,Sunbal Ayaz,Jian Long,Wenze Guo,Ling Zhao,Zhenhao Xi
2,5-furandicarboxylic acid (FDCA), a high-value biomass-derived monomer, serves as a crucial building block for sustainable polymers including polyesters, polyamides, and polyurethanes. This study systematically investigated the catalytic oxidation of 5-hydroxymethylfurfural (HMF) to FDCA over Pt/Al2O3and Pt–Bi/Al2O3catalysts. The 5Pt/Al2O3catalyst yielded 60.6% FDCA after 12 h under optimized conditions (80 °C, 0.1 MPa O2, 1 equiv. Na2CO3). Remarkably, Bi-modified 5Pt–1Bi/Al2O3catalyst dramatically enhanced catalytic performance, achieving 94.1% FDCA yield within 6 h under optimized conditions (80 °C, 1.5 MPa O2, 2 equiv. Na2CO3). Comprehensive characterization revealed that the exceptional activity originates from Bi–O–Pt interactions that modulate the electronic structure and oxidation state of Pt active sites, which facilitates the oxidation of intermediate 5-formyl-2-furancarboxylic acid (FFCA) to FDCA, the rate-limiting step of HMF oxidation. This work demonstrates an efficient Bi-promoted Pt catalytic system for FDCA production with significant potential for industrial application.
研究领域:
催化化学
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可再生能源
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绿色化学
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生物质利用
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可持续聚合物
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DOI
高影响因子
JOURNAL OF CATALYSIS
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2025
·
IF 6.5
Yuxuan Xie,Zhao Li,Ziruo Zeng,Lina Sun,Shuangyou Bao,Xin Sun,Kunlin Li,Chi Wang,Fei Wang,Ping Ning,Kai Li
To investigate the mechanism of the role of active center size on the selectivity of methyl mercaptan (CH 3 SH) and methane (CH 4 ) in the deep hydrogenation reaction of carbon disulfide (CS 2 ), it was first derived from DFT calculations that the Pt cluster geometries showed a decreasing and increasing pattern on the energy barriers of the two key hydrogenation steps: (I) HCSS* to HCSSH* and (II) deep hydrogenation of CH 2 S* to CH 3 SH. For further validation, we synthesized Pt NPs with varied average sizes (1.7–4.0 nm) using a reduction-agglomeration strategy to probe the source of size sensitivity at low Pt loading. It was found that the active centers of Pt NPs located in the 2.0–3.0 nm region have the highest proportion of medium-coordinated Pt sites, which can effectively promote hydrogen spillover and enhance the HCSS* pathway. Finally, with this modulation strategy, the catalytic activity and selectivity were significantly improved at 1 wt% Pt loading, which exceeded that of the fresh 4 wt% Pt/Al 2 O 3 catalyst, and the long-term stable production of CH 3 SH (selectivity was maintained at 80 %) was achieved at 250 ℃ in the high-concentration CS 2 environment.
研究领域:
催化化学
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材料科学
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Zhenhua Ji,Shijing Xie,Hao Chen,Peng Zhang,Ding Luo,Yixuan Chai,Zhuo Wang
Aiming at the key issues of current vehicle Ammonia Slip Catalyst (ASC) catalysts, such as poor low-temperature activity, high noble metal content, and narrow operating window, this study aims to construct multi-scale pore structures in Al 2 O 3 supports of supported catalysts to regulate selective catalytic oxidation of NH 3 (NH 3 -SCO) across broad temperature ranges and space velocities by improving convective diffusion, conduction, migration, and adsorption processes within catalyst voids. Characterization results show that a series of catalyst supports with different pore structures was successfully prepared using different templates. Pt was loaded using an optimized supported catalyst preparation method. Meanwhile, the coating amount of the prepared catalyst on cordierite monolith substrates was significantly reduced, and NH 3 -SCO performance tests were conducted. The results indicate that single mesoporous structures have limited regulation on the intrinsic activity of catalysts, while macroporous structures enhance the influence of desorption and void diffusion of gas-phase reactants and products on catalytic reactions. In the presence of macroporous structures, the promotional effect of mesopores on NH 3 -SCO reactions is enhanced. Among all catalysts, hierarchical porous catalysts with larger pore diameters and better interconnected pore structures exhibit NH₃ conversion rates exceeding 99 % across the full temperature range of 200℃ - 500℃, with NH 3 concentrations below the regulatory limit of 10 ppm throughout the operating window. Macroporous structures and their pore diameters play a dominant role in regulating NH 3 -SCO reactions, particularly with stronger regulation at low temperatures. Increasing space velocity enhances the diffusion rate of NH 3 gas molecules while amplifying the influence of pore structure regulation on catalysts. Notably, compared with traditional Pt/Al 2 O 3 , pore structure regulation does not significantly increase the generation of N 2 O while effectively enhancing the catalytic activity of the ASC catalyst.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Yan Wang,Yuxi Si,Feiyue Zhang,Zhanqi Yang,Libin Liu,Yanming Hou,Hairui Lin,Zhuohan Li,Hu Li,Lele Zhang,Pengfei Xie,Youwei Cheng
Complete oxidation of propane has attracted widespread attention in the treatment of volatile organic compounds (VOCs) from Fischer-Tropsch synthesis tail gas. Pt-based catalysts have been considered highly promising catalysts for the catalytic oxidation of propane due to their high-activity. However, despite the recognized importance of the synergistic effect between Pt nanoparticles (NPs) and support materials, the detailed reaction mechanism investigation remains limited. In this work, we demonstrate that the Pt/Al 2 O 3 catalyst exhibits improved propane catalytic performance, which is attributed to the synergistic interaction between Pt NPs and surface hydroxyl groups on the support. The improved Pt dispersion in Pt/Al 2 O 3 catalysts with smaller Pt NPs facilitates the spillover of gaseous oxygen species and the stabilization of active sites for propane oxidation. Furthermore, in- situ DRIFTS characterization and density functional theory (DFT) calculation confirm that surface hydroxyl groups on Al 2 O 3 effectively reduce the activation barrier for C-H bond cleavage, thereby improving the reactivity of propane molecules. This work provides a novel insight into metal-support synergy for propane oxidation, which offers strategic guidance for the rational design of efficient catalysts in hydrocarbon conversion processes.
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
·
IF 3.141
Wei Bi,Yanjie Hu,Wenge Li,Hao Jiang,Chunzhong Li
In this work, a nanoreactor combining layers of facile traditional two-dimensional (2D) material, hexagonal boron nitride (h-BN, which often called the white graphene) with Pt/Al2O3 catalyst was designed to exhibit higher stability, activity, and selectivity in automobile exhaust treatment. Characterization revealed that h-BN does coat on the surface of platinum and forms a distinct Pt@h-BN/Al2O3 core–shell nanostructure. This as-prepared catalyst possesses good thermal stability and selectivity, because of the excellent high-temperature tolerance and the multidefected structure of the h-BN shell; that is, small molecules such as CO and O2 can easily intercalate into the nanoreactor, while large molecules such as propylene are blocked out. Meanwhile, the intercalated reactants can achieve the conversion of CO to CO2 faster (ΔT100 = 20 °C) with the confinement effect. The study indicates that constructing a nanoscale confined environment with two-dimensional (2D) coating can enhance the performance of the catalyst in multiple aspects and simultaneously provide a good example for designing nanostructured catalysts with multifaceted improvement.
研究领域:
催化化学
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纳米材料科学
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环境催化
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能源化学
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表面科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）