INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Lijun Yang,Tiantian Zhou,Zhiyi Zhang,Wei Qi,Mengfan Wang
The enzymatic oxidation of amino acids using amino acid oxidases (AAOs) as biocatalysts for α-keto acid synthesis has garnered increasing attention due to its environmental friendliness and exceptional reaction efficiency. However, the by-product H 2 O 2 inevitably causes the decarboxylation of α-keto acids and subsequently deactivates the enzyme. Herein, we used a simple in-situ biomineralization method to immobilize Pt NPs with catalase-like activity and L-amino acid oxidase (LAAO) in to a hydrogen-bonded organic framework ( TW HOF) under a mild condition, and the synthesized LAAO-Pt@ TW HOF cascade catalytic system was applied to synthesis of α-keto acid. Compared with free LAAO, the LAAO-Pt@ TW HOF exhibited a 3.3-fold activity, well reusability and complete conversion (100 %) of L-tryptophan to indole-3-pyruvic acid was achieved. This work offers a potential application of HOF materials in constructing high-efficiency enzyme-metal coupled catalyst for cascade reactions.
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高影响因子
ACS Catalysis
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2025
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IF 13.1
Jinshi Dong,Ting Li,Shengtong Li,Panpan Chang,Qianqian Jin,Jiaqiang Yang,Zhuangzhuang Lai
CO and C3H8, as typical inorganic and organic gaseous pollutants, respectively, require distinct oxidation catalysts for efficient conversion due to their unique properties. In this work, Pt catalysts with different crystal phases of TiO2 (anatase and rutile) as supports were fabricated and investigated for CO oxidation and C3H8 combustion. The surface nature of TiO2 dramatically affects the local environment and electronic properties of supported Pt. Pt-TiO2(R) exhibited superior activity for CO oxidation, whereas Pt-TiO2(A) showed higher reactivity for C3H8 total oxidation. It is concluded that Pt-TiO2(R) contains more oxygen vacancies at the interfacial Pt perimeter sites than Pt-TiO2(A) after reduction pretreatments, which facilitates CO oxidation through the Mars–van Krevelen (MvK) mechanism. The electron-deficient Pt in Pt-TiO2(A) promotes the adsorption and activation of C3H8, and the amount of charge transfer between Pt and adsorbate intermediates during C3H8 oxidation determines the preference of C-C cleavage or dehydrogenation. Lower charge transfer in Pt-TiO2(A) makes C–C cleavage more efficient and contributes to the total oxidation of C3H8. This work emphasizes the importance of engineering material’s local environment and electronic structure to design high-performance oxidation catalysts.
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Journal of Materials Chemistry A
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2025
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IF 9.5
Man Zhao,Jiamin Ma,Ze Wang,Shuai He,Na Gao,Qinyun Yan,Liwu Qiang,Wei Wen,Lifang Shi,Jun-Ming Zhang,Xiaoli Li,He Xiao,Jianfeng Jia
Rational design of Pt-based electrocatalysts necessitates precise control over nanoparticle size and electronic structure to optimize activity and durability. We develop a mesopore confinement strategy to synthesize size-tunable Pt nanoparticles embedded in hollow mesoporous carbon spheres (HMCs) with adjustable pore diameters (5-20 nm). Benefitting from the mesopore confinement, the optimized Pt/HMCs-10 demonstrates exceptional electrocatalytic performance for both the hydrogen evolution reaction (HER) and ethylene glycol oxidation reaction (EGOR), surpassing commercial Pt/C. In-situ FTIR spectroscopy, in-situ electrochemical impedance spectroscopy (EIS) and other techniques elucidate the structure-activity relationship. For HER, Pt/HMCs-10 delivers a mass activity of 5,534 mA mg Pt -1 at -40 mV (vs. RHE), 15.7 times higher than Pt/C, owing to optimized work function modulation and accelerated charge transfer. In EGOR, it achieves a record mass activity of 10,696 mA mg Pt -1 , 3.8 times higher than Pt/C. which is attributed to stabilized *OC-CH 2 OH intermediates (ΔG = 7.54 kJ mol⁻¹) and efficient C-C cleavage. The mesoporous architecture ensures exceptional Pt nanoparticle dispersion and long-term stability. This work establishes a general strategy for designing confined-metal electrocatalysts while uncovering how pore confinement simultaneously tunes electronic properties and reaction pathways.
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CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Yudi Niu,Xing Qian,Chong Xu,Hongyu Liu,Weimin Wu,Linxi Hou
A series of porous cubic nanomaterials have been prepared through a facile one-step selenylation process, in which Cu-Ni-Co, Ni-Co and Cu-Co Prussian-blue analog nanocubes transformed to Cu-Ni-CoSe x , Ni-CoSe x and Cu-CoSe x nanocubes, respectively. Among these samples, the quaternary porous nanocubes (Cu-Ni-CoSe x ) proved to be the excellent bifunctional electrocatalysts in dye-sensitized solar cells and hydrogen evolution reactions. Under the standard irradiation, Cu-Ni-CoSe x nanocubes exhibited a high power conversion efficiency of 9.74% in solar cells, which was much superior than that of Pt (8.19%). Cu-Ni-CoSe x nanocubes also delivered superb hydrogen evolution performance in terms of a low overpotential (50.2 mV) under the current density of 10 mA cm −2 and a low Tafel slope (49.6 mV dec −1 ) in alkaline medium. The outstanding characteristics of Cu-Ni-CoSe x nanocubes were benefited from their uniform sizes, porous morphologies, high surface area, low charge transfer resistances and good synergies among multiple elements.
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高影响因子
ACS Applied Materials & Interfaces
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2018
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IF 8.097
Xue-Qian Wu,Jun Zhao,Ya-Pan Wu,Wen-wen Dong,Dong-Sheng Li,Jian-Rong Li,Qichun Zhang
The development of novel strategy to produce new porous carbon materials is extremely important because these materials have wide applications in energy storage/conversion, mixture separation, and catalysis. Herein, for the first time, a novel 3D carbon substrate with hierarchical pores derived from commercially available Cu-MOF (metal–organic framework) (HKUST-1) through carbonization and chemical etching has been employed as the catalysts’ support. Highly dispersed Pt nanoparticles and amorphous nickel were evenly dispersed on the surface or embedded within carbon matrix. The corresponding optimal composite catalyst exhibits a high mass-specific peak current of 1195 mA mg−1 Pt and excellent poison resistance capacity (IF/IB = 1.58) for methanol oxidation compared to commercial Pt/C (20%). Moreover, both composite catalysts manifest outstanding properties in the reduction of nitrophenol and demonstrate diverse selectivities for 2/3/4-nitrophenol, which can be attributed to different integrated forms between active species and carbon matrix. This attractive route offers broad prospects for the usage of a large number of available MOFs in fabricating functional carbon materials as well as highly active carbon-based electrocatalysts and heterogeneous organic catalysts.
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高影响因子
MATERIALS RESEARCH BULLETIN
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2026
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IF 5.8
Huabo Li,Dong Bai,Lu Zhou
Eight post-synthesis acid treatments were systematically compared under identical polyol-derived Pt/C preparation conditions. • Citric acid treatment at pH 2 achieved 99% Pt loading efficiency and an ECSA of 106.2 m 2 gPt −1 . • The citric acid-treated catalyst delivered an ORR mass activity of 0.279 A mgPt −1 , exceeding that of commercial Pt/C. • After 30,000 potential cycles, the citric acid-treated catalyst showed a lower ECSA loss than commercial Pt/C (25.3% vs. 42.3%). Proton exchange membrane fuel cells (PEMFCs) are promising electrochemical energy-conversion devices, but their performance is limited by the sluggish kinetics of the oxygen reduction reaction (ORR). In this study, the effects of post-synthesis acid treatment on polyol-derived Pt/C catalysts supported on Vulcan XC-72 were systematically investigated. Eight chemically distinct acids, including citric, sulfuric, phosphoric, tartaric, oxalic, nitric, acetic, and hydrochloric acids, were compared under otherwise identical preparation conditions, followed by a separate citric-acid dosage series corresponding to final pH values of 2–5. The influences of acid chemistry and post-treatment pH on Pt retention, nanoparticle size and dispersion, Pt surface oxidation state, electrochemically active surface area (ECSA), ORR activity, and durability were evaluated. Thermogravimetric analysis showed that the citric-acid-treated catalyst exhibited a residual Pt fraction of 29.68 wt%, corresponding to approximately 99% of the nominal Pt loading. XRD and TEM analyses revealed Pt crystallite and particle sizes in the range of approximately 2.2–3.8 nm, with the citric-acid-treated catalyst showing relatively small and uniformly dispersed Pt nanoparticles. At pH 2, the citric-acid-treated catalyst achieved the highest ECSA of 106.2 m 2 gPt −1 and an ORR mass activity of 0.279 A mgPt −1 at 0.9 V vs. RHE, exceeding the values measured for commercial Johnson Matthey HiSPEC™ 3000 Pt/C (91.1 m 2 gPt −1 and 0.216 A mgPt −1 , respectively). XPS further showed that the citric-acid-treated catalyst retained a relatively high fraction of metallic Pt, consistent with its favorable electrochemical accessibility and surface state. After 30,000 potential cycles, the citric-acid-treated catalyst exhibited a lower ECSA loss than the commercial reference (25.3% vs. 42.3%) and less XRD-detectable crystallite coarsening. Single-cell measurements under matched cathode Pt loading also showed higher cell voltages for the citric-acid-treated catalyst over the investigated current-density range. These results indicate that post-synthesis citric acid treatment can improve Pt retention, nanoparticle dispersion, electrochemical accessibility, ORR activity, and structural durability through acid-dependent surface and Pt–carbon interfacial effects. The present protocol was demonstrated at a laboratory scale, yielding approximately 80 mg of catalyst per batch. Download: Download high-res image (152KB) Download: Download full-size image A comparative analysis was conducted on the oxygen reduction activity of Pt/C catalysts obtained under various chelating agents and their dosages. The optimal chelating agent and its corresponding amount were identified, and an in-depth investigation was carried out to understand the factors contributing to their superior performance.
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JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Jingxiao Liu,Dayi Yang,Fei Shi,Xiaoying Song,Guohao Cui,Huijun Sun,Chaofan Chen,Ziwei Tian,Meiyu Wang
In order to obtain high-performance energy-saving window material, Pt-Cs x WO 3 /SiO 2 composite aerogels were prepared by in-situ solvothermal synthesis and ambient pressure drying method. The relationship among the near-infrared shielding ability, thermal conductivity , thermal insulation performance and microstructure of Pt-Cs x WO 3 /SiO 2 composite aerogel was investigated. The as-prepared composite aerogel after heat-treatment at 450 °C exhibits low thermal conductivity (0.1090 W/(m·k)) of SiO 2 aerogel and near-infrared shielding ability at the same time due to its high pore volume (0.537–0.796 cm 3 /g), specific surface area (113.968–141.284 m 2 /g) and W 5+ content. The near-infrared shielding rate at 1500 nm of the composite aerogel could attain to 84% when the visible light transmittance is 72%. As Pt-Cs x WO 3 /SiO 2 composite aerogel has the synergistic effect of near-infrared shielding and low thermal conductivity, the composite aerogel heat-treated at 450 °C has excellent visible light transparency and thermal insulation performance. This research provides a new idea for developing high efficient energy-saving window glasses.
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ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Chao-Qing Li,Xiao-Lin Hou,Dong-Xue Jiang,Bin Zhang,Meng-Wen Ma,Xiao-Ting Xie,Yuan-Di Zhao,Tian-Cai Liu,Bo Liu
Photothermal therapy is a powerful candidate for tumor treatment. However, photothermal therapy still faces some challenges, such as lacking photothermal agents with high photothermal conversion efficiency and undesirable inflammatory responses, which may result in tumor recurrence and therapeutic resistance. Here, the Pt/Te nanoheterostructures (PT) were synthesized by a simple hydrothermal reaction. The photothermal conversion efficiency was up to 51.84%. The outstanding photothermal conversion capacity of PT was attributed to the unique localized surface plasmon resonance frequency of metals and semiconductors and the increased circuit paths of electron transitions from nanoheterostructures. After coating with the murine mammary carcinoma (4T1) cell membrane, the camouflaged PT (mPT) exhibits excellent biocompatibility and effective homologous targeting capacity. Benefiting from antioxidative activity, mPT can efficiently scavenge inflammation-related reactive oxygen species and cytokines (such as tumor necrosis factor (TNF)-α, interleukin (IL)-1β, and IL-6) caused by hyperthermia to alleviate inflammation in vitro and in vivo. The in vitro and in vivo therapeutic results showed that mPT could effectively inhibit 4T1 breast tumors. In addition, the in vivo therapy could be guided by photoacoustic imaging. These results demonstrated that these multifunctional mPT provide a paradigm for biomimetic metal and semiconductor nanoheterostructures for enhanced photothermal therapy and anti-inflammatory action on tumors.
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ACS Catalysis
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2022
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IF 13.7
Jinqiu Guo,Mi Peng,Zhimin Jia,Chengyu Li,Hongyang Liu,Hongbo Zhang,Ding Ma
C–H bond activation is very important in upgrading of alkanes or aromatics into value-added products, such as alkenes or even oxygenates, etc., during natural gas utilization and hydrogen transportation via chemical strategies. Because of the low polarization ability and high bond energies of the C–H bonds within the hydrocarbons, the selective C–H bond activation suffers from low efficiency for a long time and requests systematic work on understanding the reaction mechanisms, in which the kinetic studies are highly desired and not well understood in a comprehensive manner. Herein, a universal kinetic model has been established to explain the entire reaction process of C–H bond activation for cyclohexane dehydrogenation (CDH) over various structures of Pt (cluster: Ptn and particle: Ptp) decorated nanodiamond@graphene (Ptx/ND@G) nanocomposite with specific emphasis on the elementary steps, the rate-determining step(s) (RDS), and the most abundant surface intermediates (MASIs). With the combination of kinetic and thermodynamic measurements, it was found that cyclohexane dehydrogenation shows different reaction mechanisms over Ptn catalysts, compared to Ptp catalysts. And C6H12 dehydrogenation rates showed nearly first-order (Ptn: rDH ∼ [C6H12]∼0.6; Ptp: rDH ∼ [C6H12]∼1.0) dependence on the C6H12, while the orders of H2 are obviously different over the two catalysts, in which the addition of H2 shows negligible effect (nearly zero-order) once a trace amount of H2 is introduced, and then obviously promotes (nearly second-order) dehydrogenation over Ptn (Ptn: rDH ∼ [H2]∼0–2), while the dehydrogenation rate over Ptp is prominently inhibited by adding H2 to the catalytic system under similar reaction conditions (Ptp: rDH ∼ [H2]∼ –1.0–0), thus indicating that Ptn and Ptp catalysts have diverse MASIs, which is further supported by the developed universal kinetic model of dehydrogenation. That perfectly explains the relationship between the dehydrogenation events and the coverage of surface hydrogen species. The predicted reaction process following a Langmuir–Hinshelwood model that matches the experimental configurations very well, suggesting that the first C–H bond rupture of C6H12 is probably the RDS for both Ptn and Ptp catalysts, while the MASIs varied from C6H10* to H* explained the diversities of the H2 dependencies between Ptn and Ptp catalysts systematically. This kinetic case study as well as the established universal model could be easily extended to some other systems related to C–H bond rupture and attracts the attention on exploring the correlations between nanostructure and the reaction performance.
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高影响因子
ACS Omega
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2021
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IF 3.512
Kezhong Wu,Yingshan Wu,Pengyuan Fu,Dandan Yang,Bei Ruan,Mingxing Wu,Ruitao Wu
To replace precious Pt-based counter electrodes (CEs) with a low-cost Pt-free catalyst of CEs is still a motivating hotspot to decrease the fabrication cost of dye-sensitized solar cells (DSSCs). Herein, four different V2O3@C composite catalysts were synthesized by pyrolysis of a precursor under N2 flow at 1100 °C and further served as catalytic materials of CEs for the encapsulation of DSSCs. The precursors of V2O3@C composites have been prepared via a sol–gel method using different proportions of V2O5 with soluble starch in a H2O2 solution. Power conversion efficiencies (PCEs) of 3.59, 4.79, 5.15, and 5.06% were obtained from different V2O3@C composites, with soluble starch-to-V2O5 mass ratios (S/V) of 1:2, 1:1, 2:1, and 4:1, respectively, as CEs to reduce iodide/triiodide in DSSCs. The improvement of electrode performance is due to the combined effects on the increased specific surface area and the enhanced conductivity of V2O3@C composite catalysts.
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高影响因子
JOURNAL OF CATALYSIS
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2020
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IF 7.888
Huiyue Xin,Wenbo Zhang,Xixi Xiao,Li Chen,Peng Wu,Xiaohong Li
Due to coexistence of two conjugated unsaturated functional groups in cinnamaldehyde (CAL), exploring efficient catalysts with desirable selectivity to highly value-added products is still challengeable for the selective hydrogenation of CAL. Herein, Ni x Fe 1- x Al 2 O 4+ δ spinel composite metal oxides (SCMOs) supported Pt catalysts were developed and proved to be active and selective for the selective hydrogenation of CAL. Moreover, the selectivity switch can be realized just by changing the Ni/(Fe + Ni) molar ratios in Ni x Fe 1- x Al 2 O 4+ δ SCMOs. As a result, the excellent cinnamyl alcohol (COL) selectivity (~92.2%) and hydrocinnamaldehyde (HCAL) selectivity (~80.7%) were achieved on Pt/FeAl 2 O 4+ δ and Pt/NiAl 2 O 4+ δ , respectively. Based on the kinetic investigation of further hydrogenation of semi-hydrogenated product, the reason for the selectivity switch with Pt/Ni x Fe 1- x Al 2 O 4+ δ was revealed. In combination with detailed characterization, the excellent COL selectivity on Pt/FeAl 2 O 4+ δ can be attributed to more Pt(1 1 1) facets and FeO x species which can facilitate the preferential activation of C O bonds; while the high HCAL selectivity on Pt/NiAl 2 O 4+ δ is owing to the fact that there are more low coordinated active sites and two neighbouring Pt sites.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Jiawen Li,Huali Jin,Min Wei,Wenjie Ren,Jinshui Wang,Yurong Zhang,Ligen Wu,Baoshan He
In this work, a sensitive dual mode competitive electrochemical immunosensor based on differential pulse voltammetry (DPV) and square wave voltammetry (SWV) response modes for quantitative determination of dibutyl phthalate (DBP) was successfully established. According to diethylenetriamine (DETA) assisted hydrothermal strategy, a novel N-doped graphene/CoSe 2 nanobelt composite was prepared. Afterwards, PEI functionalized NG-CoSe 2 and gold nanowires (AuNWs) were further compounded as a preliminary signal amplification platform for immunosensor. Thionine (Thi)-loaded [email protected] and secondary antibody (Ab 2 ) connected as a signal label. The immobilized coating antigen DBP-BSA and the DBP compete for limited antibody binding sites. The concentration of DBP can be determined by DPV detect the Thi signal loaded on the [email protected] 2 label. It can also be determined by SWV mode to detect the current generated by the reaction system of H 2 O 2 and o-phenylenediamine (o-PD) catalyzed by [email protected] with peroxidase like properties. Under optimum conditions, the linear ranges of the DPV and SWV modes were 1 pg mL −1 ∼1 μg mL −1 . And LOD were 0.486 pg mL -1 (DPV) and 0.711 pg mL -1 (SWV), respectively. Besides, it exhibited outstanding selectivity, reproducibility, stability and can be used for sensitive detection of DBP in real samples.
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