INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Junpeng He,Ruiqing Zhang,Xi Chen,Bofeng Zhang,Guozhu Liu
Active fuel cooling is an effective way to overcome the thermal barrier for hypersonic flight. Pt-based nanofluid catalysts are effective in enhancing the chemical heat sink of endothermic hydrocarbon fuels (EHFs) by facilitating a catalytic dehydrogenation-cracking reaction. However, highly-dispersed Pt nanoparticles often face the problem of poor thermal stability in nanofluids. In this work, a NaH-assisted deprotonation method was applied to synthesize N-heterocyclic carbene (NHC)-capped highly-dispersed Pt nanoparticles (Pt@NHC14). The average size of the Pt nanoparticles in optimized Pt@NHC14 was 2.4 nm. Pt@NHC14 exhibited a high heat sink of 3.80 MJ/kg at 725 °C in the quasi-homogeneous conversion of decalin, which was 10% higher than Pt@ILs14 without a deprotonation strategy. This could be ascribed to the dehydrogenation process being promoted, which was verified by a hydrogen yield of 9.5% on highly dispersed Pt of Pt@NHC14, and that is 46% higher than that of Pt@ILs14. This research synthesizes N-heterocyclic carbene-capped highly-dispersed Pt nanoparticles and provides valuable insights into the strong endothermic technology.
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JOURNAL OF ORGANOMETALLIC CHEMISTRY
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2025
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IF 2.4
Zhiqing Liu,Zepan Sun,Haifeng Zhang,Yajing Pan,Pei Liu,Chonggang Wu,Tao Hu
Mussel inspired polydopamine (PDA) has been extensively applied as a linker in noble metal based heterogeneous catalysts to promote either metal dispersion or metal-support interaction. Herein, three heterogeneous Pt catalysts were first prepared by depositing Pt on PDA encapsulated porous silica (SiO 2 -PDA-Pt) with different PDA coating degree and their catalytic activity toward two model hydrosilylation reactions between methyldichlorosilane and a non-polar 1-octene and a polar allyl cyanide were investigated. Meanwhile, stability and recyclability of these catalysts were also explored. Results show that PDA coating degree may directly influence both Pt loading and its oxidation state, which then resultantly tailor the activity of the supported catalysts. The SiO 2 -PDA-Pt catalysts all showed excellent activity even after six catalytic rounds even though a gradual loss of Pt species were observed. Among them, the activity of the one with lowest PDA coating exhibited both higher activity and better recyclability, which is mainly ascribed to a higher content and retention of more active low valent Pt 0 species that may be well stabilized by proper PDA coating.
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RARE METALS
·
2025
·
IF 11
Yang Fan,Zhang Jun-Ning,Zhang Chao,Xu Xin-Da,Li Bing,Yang Woochul,Xie Wan-Feng
Real-time detection of acetic acid vapor is of concern for ensuring environmental and personal safety. However, acetic acid gas sensors, particularly those based on Bi 2 O 3 , often fail to meet practical performance requirements owing to their slow response characteristics and high operating temperature. To enhance sensing performance, highly permeable Bi 2 O 3 microspheres decorated by Pt-nanoparticles are rationally synthesized by a facile template method. Among the fabricated sensors, the one based on 3 wt% Pt-decorated Bi 2 O 3 demonstrated excellent sensing performance. Specifically, the sensor displayed high selectivity for acetic acid, rapid response and recovery times (22.5 and 9 s, respectively), strong resistance to interference, and good long-term stability at a low operating temperature (150 °C). Notably, the sensor exhibited an exceptionally high response of 126 to 100 ppm acetic acid—the highest reported value for Bi 2 O 3 -based sensors tested at a relatively low operating temperature in recent years. These results demonstrate that Pt-decorated Bi 2 O 3 holds strong potential for use in high-performance acetic acid sensors. Graphical abstract
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SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Wenhai Wang,Shu Xiao,Zhijian Jia,Hongzhen Xie,Tianhua Li,Qiqin Wang,Ning Gan
Foodborne pathogens could result in serious health issues to public and thus some rapid analysis methods are urgent developed to monitor them. Herein, a dual-mode aptasensor based on electrochemical and colorimetric modes was constructed for the on-site detection of Vibrio parahaemolyticus ( V.P) in shrimps as a model. A novel nanoprobe ( [email protected] @MXenes) was developed to generate both electrochemical and colorimetric signals by modifying phenylboronic acid and ferrocene on Pt-MXenes nanocomposite . The nanoprobe exhibited both features of peroxidase mimic and specific recognition. Simultaneously, a V.P aptamer-functionalized electrode interface was fabricated to firstly specifically capture V.P, then conjugated with [email protected] @MXenes to form a sandwich complex. The complex could catalyze tetramethylbenzidine (TMB)-H 2 O 2 to produce a visible signal, and generate electrochemical signal simultaneously. Under the optimal condition, the aptasensor could determine as low as 5 CFU mL −1 V.P by electrochemical mode and 30 CFU mL −1 V.P by colorimetric mode. These superior performances may be attributed to that the synergistic catalysis and conductive effects deriving from Pt and MXenes on the nanoprobe can significantly amplify the signals to improve detection sensitivity. In particular, the dual detection system could mutually verify to achieve high accuracy. The aptasensor could also be expanded to rapid analysis of other food-borne pathogens through changing the aptamer on the electrode.
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ChemCatChem
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2025
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IF 3.9
Qian Li,Jie Zhang,Tong Yu,Jinwei Chen,Gang Wang,Zongbo Shi,Runsheng Zhuo,Ruilin Wang
Propane dehydrogenation (PDH) is a pivotal technology for propylene production. Supported Pt catalysts for PDH are often subjected to nanoparticle agglomeration and coke deposition, thus limiting their stability and efficiency. Herein, we constructed a high-performance Pt-Ce catalyst consisting of CeO x with redox properties and active Pt species with the regulated electronic properties. Through the controllable impregnation, the unique structure of adjacent Pt-CeO x sites were elaborately supported on the Mn-modified Silicalite-1 (Mn-S-1). Characterization results reveal that the generated Ce 3+ /V O species contribute to the formation of electron-deficient Pt 0 -V O -Ce 3+ active sites via hydrogen spillover and electron transfer. Benefiting from the high dispersion of active components, appropriate acidity, redox activity of V O , and electron-deficient Pt 0 sites, the optimal 0.5Pt0.2Ce/Mn-S-1 catalyst exhibits superior propane conversion of 38.23%, propylene selectivity of 88.45%, and excellent coke resistance. This study not only reveals the intrinsic correlation between active Pt and CeO x species but also provides valuable guidance for designing highly efficient catalysts. Graphical A high-performance Pt-Ce catalyst consisting of CeO x with redox properties and active Pt species with the regulated electronic properties was constructed through a controllable impregnation. Benefiting from the high dispersion of active components, appropriate acidity, redox activity of V O , and electron-deficient Pt 0 sites, the optimal 0.5Pt0.2Ce/Mn-S-1 catalyst exhibits superior propane dehydrogenation performance.
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Molecular Catalysis
·
2025
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IF 4.9
Shijun Huang,Yu Song,Shansi Zhong,Panpan Chang,Jinshi Dong,Jiaqiang Yang
Ni based catalysts are widely used in dry reforming of methane (DRM) but still face the issue of deactivation caused by sintering and carbon deposition. Pt doped Ni-Al 2 O 3 catalyst was found of great durability which kept 100 % conversion of CO 2 over 300 h without detectable loss in activity at 700 °C, while Ni-Al 2 O 3 catalyst only maintained ∼10 h at the same condition. It is revealed that Pt and Ni are separately dispersed on Al 2 O 3 with the structure of small Pt particles distributing around Ni like satellites. Kinetic experiments, temperature-programmed surface reactions (TPSR) and DFT calculations indicated that CH 4 prefers to dissociatively adsorb on Pt surface but is hard to deeply crack to carbon because of the high energy barriers. As a result, the respective adsorption of CO 2 on Ni and CH x on Pt surface largely reduced the bear of competitive adsorption and activation of both reactants on individual Ni and thus brought enhanced activity. Additionally, surrounding Pt effectively suppresses the sintering of Ni during reaction.
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Membranes
·
2025
·Vol. 15
·期 12
·362
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IF 3.6
Ruili Sun,Dongming Zhu,Nan Wu,Yi Li,Ting Chen,Shaorong Wang
Efficient management for electrochemical reactions within Pt/C electrodes, specifically the oxygen reduction reaction (ORR) and methanol oxidation reactions (MOR), is critical to the performance and long-life stability of direct methanol fuel cells (DMFCs). Optimizing the hierarchical macro/mesoscale structures of Pt/C electrodes plays a decisive role in regulating the mass transport pathways and electrochemical reactions. In this work, bead-like Pt/C-ionomer hybrid porous nanofibrous networks are constructed via electrospinning. Ascribing to the hierarchical architecture consisting of continuous nanofibers and bead-like Pt/C-ionomer fibrous networks, the hybrid porous nanofibrous electrode exhibits a 55% increase in maximum mass power density in comparison to the conventional Pt/C electrode. Such enhancement is attributed to excellent ORR activity enabled by efficient triple-phase reaction regions, coupled with superior MOR tolerance resulting from restricted methanol transport from the hybrid porous nanofibrous electrode to triple-phase reaction regions.
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Small
·
2025
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IF 12.1
Yingxue He,Bofeng Zhang,Jianhua Zhang,Juntian Chen,Kailing Zhou,FengLei Li,Hao Wang
Developing efficient hydrogen evolution reaction (HER)/hydrogen oxidation reaction (HOR) bifunctional electrocatalysts is crucial for next-generation hydrogen energy technologies. However, the fixed electronic structures of conventional catalysts fundamentally constrain their bifunctional performance. In this study, a Pt/WO 3 -based catalyst with dynamic self-switching electronic state was designed for boosting bifunctional HER/HOR electrocatalysis. During HER, the applied negative potential drives proton (H + ) insertion into WO 3 , inducing a phase transition from semiconducting WO 3 to metallic-like H x WO 3 . Electron transfer from H x WO 3 to Pt shifts Pt sites from an electron-deficient (Pt/WO 3 , model 1) to an electron-rich state (Pt/HxWO 3 , model 2), reducing the HER energy barrier from 0.4391 to 0.327 eV. Conversely, during HOR, the positive potential extracts H + from H x WO 3 , restoring the WO 3 phase and the electron-deficient Pt state, thereby lowering the HOR energy barrier from 0.5761 (Pt/H x WO 3 ) to 0.3253 eV (Pt/WO 3 ). The self-switching electronic state (model 2/model 1) endows the Pt/WO 3 -based catalyst with outstanding activity, featuring a low HER overpotential of 56 mV at 100 mA cm −2 and a high HOR exchange current density of 5.8 mA cm −2 . As an anode in hydrogen proton batteries (HPBs), it delivers a discharge capacity of 169.9 mAh g −1 at 0.1 A g −1 and maintains 80 mAh g −1 even at −40°C.
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Analytical Methods
·
2025
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IF 2.6
Huiping Feng,Yue Sun,Jiang Wang,Jiwei Xu,Xihui Mu,Bin Du,Zhaoyang Tong,Bing Liu
Staphylococcal enterotoxin B (SEB) is a major pathogenic factor in foodborne diseases, and its rapid and sensitive detection is crucial for early warning of food safety risks and public health protection. In this study, a colorimetric immunosensing system for SEB detection was constructed based on a magnetic covalent organic framework (COF) composite loaded with platinum nanoparticles (Pt NPs) that exhibit dual enzymatic activities. The effective loading of Pt NPs endows the composite with excellent peroxidase (POD) and oxidase (OXD)-like activities. The COF matrix not only provides abundant binding sites for Pt NP dispersion but also enhances substrate adsorption, thereby significantly improving catalytic efficiency. By introducing an Fe3O4 core, the nanocomposite enables facile preparation of antibody–nanoparticle conjugates through separation and enrichment functions. The Fe3O4@COF@Pt nanocomposite demonstrates excellent peroxidase- and oxidase-like activities, capable of decomposing H2O2 and O2 to generate hydroxyl radicals (˙OH) and superoxide anions (O2˙−), which catalyze the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into blue oxidized TMB (OXTMB), resulting in a visible color change for signal output. The sensor achieves specific detection by utilizing its peroxidase-mimicking activity, exhibiting a linear detection range of 1–200 ng mL−1 with a detection limit as low as 0.395 ng mL−1. This nanozyme-linked immunosorbent assay (NLISA) based on Fe3O4@COF@Pt offers a highly sensitive and convenient platform for SEB detection.
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Catalysts
·
2024
·Vol. 14
·期 11
·774
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IF 3.8
Ziyang Li,Chunjie Wu,Chenhao Zhang,Hui Li
The selective hydrogenolysis of glycerol to 1,3-Propanediol (1,3-PDO) presents a sustainable approach, leveraging a bio-renewable feedstock and significantly enhancing the economic viability of biodiesel production. However, the limited selectivity toward 1,3-PDO in glycerol hydrogenolysis has hindered its widespread adoption on an industrial scale. In this work, we synthesized a series of Pt/WO3–Al2O3catalysts using a simple wetness sequential impregnation method. Comprehensive characterization and kinetic studies revealed that the surface tungsten content of the catalyst exerted a critical and multifaceted influence on the catalytic performances. Under optimal conditions, glycerol could be selectively converted to 1,3-PDO with a yield of 43% in a fixed-bed continuous flow reactor. Furthermore, a plausible reaction mechanism for glycerol hydrogenolysis was proposed based on the correlations between catalyst structure and catalytic performance.
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Materials Research Express
·
2021
·Vol. 8
·期 5
·055504
·
IF 1.62
Fengpo Yan,Hao Zhang,Yu Zhang,Fugui Yang
0.3 mol% platinum loaded g-C3N4 sample was prepared by photoreduction method to study the long-term stability of photocatalysts. For the first time, we have discovered the oriented attachment (OA) mechanism growth of Pt nanoparticles on g-C3N4 solid surface, which is completely different from Ostwald ripening (OR) or particle migration and coalescence (PMC) that previously reported. The Pt nanoparticles perform Brownian motion on the surface of g-C3N4 support under the collision of liquid molecules, then two or more nanoparticles attach together via the crystallographic orientation to construct larger ones. Al2O3 film prepared by atomic layer depositon was introduced to inhibit the Brownian motion of Pt nanoparticles. It is found that as the increase of the Al2O3 growth cycles, the photocatalytic hydrogen production of Pt/g-C3N4 coated by Al2O3 increase from 1.14 mmolg−1h−1 to 2.08 mmolg−1h−1 and then decrease to 1.4 mmolg−1h−1, and the apparent quantum efficiency (QE) also increase from 1.2% to 2.1% and then decrease to 1.4%. Meanwhile, the long-term stability of photocatalyst always increases. This work has revealed new pathway of photocatalytic nanoparticle growth on solid surface and proposed the method to prevent it.
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Journal of Water Process Engineering
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2024
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IF 6.3
Nan Zhao,Kangjie Zhang,Yuexiang Lu,Shuang Liu,Zhe Wang,Xiangke Wang
The photocatalytic method has been proven as one of the effective methods for uranium removal from radioactive wastewater. Herein, a photocatalyst UiO-66-NH 2 -Pt was prepared using the adsorption-photoinduction method. Pt was first adsorbed on the substrate and then photo-reduced under light irradiation to be doped into the structure of UiO-66-NH 2 . The characterization results implied the formation and atomic dispersion of Pt with a loading content of 1.90 wt%. The loading of Pt has promoted the effective separation and transfer of photogenerated electron-hole pairs, broadened the visible light adsorption range and narrowed down the bandgap, thus to enhance the photocatalytic activity. Then they were applied for the photo-removal of uranium under air atmosphere. The reaction rate of UiO-66-NH 2 -Pt was about 7 times that of pure UiO-66, confirming the higher photocatalytic activity after the loading of Pt. It showed good reusability and was also universal for different water matrix. The detection of hydroxyl radicals with EPR method indicated the formation of H 2 O 2 , which could react with uranyl ions to form metastudtite under air. This work further verified the feasibility of photoinduced synthesis of Pt single atom and provided a novel material for photocatalytic removal of uranyl ion under air.
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