APPLIED ORGANOMETALLIC CHEMISTRY
·
2016
·Vol. 30
·期 8
·722-725
·
IF 2.452
Peipei Zou,Meisong Wang,Liang Zhao,Liyi Dai,Yuanyuan Wang
A Pt@three-dimensional graphene (Pt@3DG) composite hydrogel with a unique porous nanostructure was prepared and used as an efficient, recyclable and robust catalyst for the reduction of 4-nitrophenol to 4-aminophenol under mild conditions. The influence of graphene architecture on catalytic activities was comparatively investigated by loading the same amount of Pt on reduced graphene oxide. Pt@3DG exhibits a very high catalytic activity owing to the three-dimensional macroporous framework with high specific surface area, numerous activation sites and efficient transport pathways. Moreover, catalyst separation can be easily achieved by simple filtration, and the catalyst can be reused for at least five runs, maintaining its high catalytic activity. Copyright © 2016 John Wiley & Sons, Ltd.
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FOOD CHEMISTRY
·
2026
·
IF 9.8
Boyan Sun,Linqian Qin,Vasily G. Panferov,Chujun Liu,Xiaomei Wang,Jiankang Ren,Qian Ran,Sihan Wang,Haiyang Jiang
Ractopamine (RAC), a banned β-adrenergic agonist, poses severe risks to human health, necessitating rapid and ultrasensitive detection methods. This work presents a novel dual-mode immunoassay utilizing peroxidase-mimicking Au@Pt core-shell nanozymes for the colorimetric and photothermal detection of RAC. The optimized one-step synthesized Au@Pt nanoparticles (Au/Pt = 1:1) exhibited exceptional peroxidase-like activity (27.32 U/mg). After conjugation with monoclonal antibodies, the nanozymes served as immunoprobes in a one-step enzyme-linked immunosorbent assay (ELISA). The enhanced catalysis was elucidated by reactive oxygen species trapping, confirming hydroxyl radicals and singlet oxygen as key intermediates. The assay demonstrated outstanding sensitivity, with limits of detection at 5.32 pg/mL (colorimetric) and 1.03 pg/mL (photothermal), a significant improvement over conventional ELISA. Practical applicability was confirmed in spiked pork and pig urine, achieving recoveries of 86.0–113.0% (coefficient of variation<14.3%), offering a robust platform for on-site screening.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 4
·258
·
IF 5.4
Liu Yeru,Zhang Mengxue,Zhou Yifan,Zhao Xiaolei,Li Xiangli,Liu Hongwei,Cai Qiyong,Liu Song
A reversed positive-signal electrochemical immunosensor was developed for ultra-sensitive tetracyclines (TC) detection, leveraging a synergistically engineered interface of conductive urchin-like Au@Pt nanoparticles (NPs) and insulating SiO 2 nanoprobes. The Au@Pt NPs provide a high-performance electroactive foundation that significantly expands the effective surface area and accelerates interfacial electron transfer kinetics. A ‘signal-on’ mechanism was innovatively constructed by utilizing the mass-transport resistance and steric hindrance of bulky, insulating SiO 2 -antibody conjugates. In the absence of TC, the anchoring of SiO 2 nanoprobes creates a dense insulating barrier that truncates electron tunneling paths. Conversely, the competitive recognition of free TC prevents probe anchoring, removing the barrier and restoring charge transfer, which results in a significantly enhanced signal. This strategy effectively transforms passive dielectric blocking into a sensitive electrochemical response, allowing effective signal amplification of subtle recognition events. Under optimized conditions, the sensor exhibited a linear differential pulse voltammetry (DPV) response from 20 fg/mL to 20 ng/mL, with detection limits of 4.55 fg/mL and 11.58 fg/mL for the glassy carbon electrode and the screen-printed electrode, respectively. The sensor demonstrated excellent specificity against structural analogs, high reproducibility, and reliable recovery in spiked milk samples. This work validates the efficacy of using cost-effective insulating nanomaterials for high-sensitivity biosensing, offering a robust tool for food safety surveillance.
Section
Graphical
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiaohui Chen,Zhishuncheng Li,Zhishan Li,Jia Liu,Zhouhang Li,Hua Wang,Kongzhai Li
Hydrogen energy represents a promising, sustainable and clean energy resource. However, widespread application of water electrolysis for hydrogen production remains limited by the reliance on expensive noble-metal-based catalysts. Developing cost-effective and efficient electrocatalysts is therefore crucial. Herein, we propose a novel heterostructure strategy to prepare non-noble-metal-based catalysts for overall water splitting. Through a simple two-step synthesis, NiTe-supported catalysts were fabricated: NF/NiTe/NiFe(OH) x -2 for the oxygen evolution reaction (OER) and NF/NiTe/Pt for the hydrogen evolution reaction (HER). Electrochemical measurements revealed outstanding catalytic activities: the optimized catalysts achieved current densities of 10 mA cm −2 at low overpotentials of 264 mV for the OER and 30 mV for the HER. When integrated into a two-electrode electrolyzer, the system required only 1.55 V to reach 10 mA cm −2 and 1.73 V to reach 100 mA cm −2 , while maintaining stable operation for 100 h and 50 h, respectively. Density functional theory calculations reveal that the Pt/NiTe heterostructure possesses a near-optimal Gibbs free energy for hydrogen adsorption (ΔG H* =-0.06 eV), which substantially accelerates HER kinetics. This work provides fundamental insights into heterostructure design and offers guidance for the rational development of efficient nanomaterials for catalytic applications.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Xiaomei Ning,Jingzhao Dai,Hongxia Zhang,Silin He,Yuting Xu,Xiaosong Zhou,Jin Luo,Xunfu Zhou,Liang Zhan
Fe-modified nitrogen-doped carbon fibers (Fe X @NCNF) were fabricated by combining electrospinning with post-calcination. Herein, the metal-support interaction (MSI) between Pt and Fe X @NCNF was systematically investigated. The results demonstrated that tuning Fe content significantly altered the microstructure of the carbon support and the composition of its surface species, particularly the proportion of Fe 3 C among the iron species. This variation in turn modulated the MSI, thereby regulating the electronic structure of Pt. Electron transfer occurred from Fe 3 C to Pt, and Pt/Fe X @NCNF catalyst with a higher Fe 3 C content exhibited a lower Pt4f 7/2 (0) binding energy (B.E.) and a higher proportion of metallic Pt(0). Fe-modified Pt catalyst with electron-enriched Pt surfaces exhibited superior activity toward both glycerol and formic acid electro-oxidation reactions, along with significantly enhanced tolerance to CO poisoning. This work provides an effective strategy for regulating catalyst structure and optimizing MSI to boost electrocatalytic efficiency, offering valuable insights for the design of high-performance fuel cell catalysts.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Xuedong He,Xiang Han,Xueyan Zhou,Jiadong Chen,Juan Wang,Yan Chen,Lianghao Yu,Nan Zhang,Jun Li,Shun Wang,Huile Jin
Achieving large current density is crucial to the practical application of large-scale hydrogen production by water splitting, but it is hindered by sluggish and unstable catalysts. Herein, a Pt-induced NiFe layered double hydroxide (Pt-NiFe LDH) nanosheet is synthesized for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). It affords 10 mA cm –2 at overpotentials of only 198 mV and 36 mV for OER and HER, respectively. Impressively, an alkali-electrolyzer (Pt-NiFe LDH || Pt-NiFe LDH) exhibits a stable cell voltage of 1.887 V to deliver a current density of 1000 mA cm –2 over 3000 h. The introduction of Pt modulates the electronic structure on the surface of NiFe LDH by charging redistribution at the interface and decreasing the Gibbs free energy change (ΔG) for the potential determining step (from *O to *OOH) during OER. This work provides a facile strategy for developing catalysts for large current density water splitting.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xin Deng,Jingyi Chen,Chenyang Zhang,Yong Yan,Bingzheng Wu,Jie Zhang,Gang Wang,Ruilin Wang,Jinwei Chen
Catalysts for the electrolysis of water are critical in the production of hydrogen for the energy industry. The use of strong metal-support interactions (SMSI) to modulate the dispersion, electron distribution, and geometry of active metals is an effective strategy for improving catalytic performance. However, in currently used catalysts, the supporting effect does not significantly contribute directly to catalytic activity. Consequently, the continued investigation of SMSI, using active metals to stimulate the supporting effect for catalytic activity, remains very challenging. Herein, the atomic layer deposition technique was employed to prepare an efficient catalyst composed of platinum nanoparticles (Pt NPs) deposited on nickel-molybdate (NiMoO 4 ) nanorods. Nickel-molybdate’s oxygen vacancies (V o ) not only help anchor highly-dispersed Pt NPs with low loading but also strengthen the SMSI. The valuable electronic structure modulation between Pt NPs and V o resulted in a low overpotential of the hydrogen and oxygen evolution reactions, returning results of 190 mV and 296 mV, respectively, at a current density of 100 mA cm −2 in 1 M KOH. Ultimately, an ultralow potential (1.515 V) for the overall decomposition of water was achieved at 10 mA cm −2 , outperforming state-of-art catalysts based on the Pt/C || IrO 2 couple (1.668 V). This work aims to provide reference and a concept for the design of bifunctional catalysts that apply the SMSI effect to achieve a simultaneous catalytic effect from the metal and its support.
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FUEL
·
2023
·
IF 7.4
Xiaoying Qi,Na Ye,Riguang Zhang,Zhao Jiang,Tao Fang
Developing the efficient and high CO tolerance electrocatalysts is important for methanol oxidation reaction. In this study, a sequence of catalysts were constructed by introducting various transition metal nitrides (TMNs) to modify the Pt/C catalyst. The corresponding electrochemical performance were evaluated to investigate the activity, kinetics, charge transfer rate, CO tolerance and stability for MOR in alkaline media. Based on the structural characterization analysis from ICP-MS, XRD, HRTEM and XPS, it could be indicated that the participation of TMNs mainly brought the electronic effect, but not for the geometric effect. The evident difference did not exist in the nanoparticle size, morphology and crystallinity of the related catalysts. After the evaluation on the catalytic performance for alkaline MOR, The TMNs-modified catalysts exhibited higher activity and lower onset potential potential compared with the commercial Pt/C. Among them, Pt-NbN/C showed the highest mass activity with 9.56-fold that of the commercial Pt/C. The faster charge transfer kinetics and reaction rate were confirmed by Tafel and EIS results. CA measurements indicated that they also exhibited higher stability and anti-CO poisoning ability for alkaline MOR, consistent with the CO stripping experiments. To quantitatively describe the realtionship of the electronic effect on the catalytic activity and CO tolerance, the d-band center was employed as a parameter to bulid the corresponding function. Interestingly, it was proposed that the rational d-band center could lead high MOR performance and anti-CO poisoning ability. The introduction of TMNs brought the evident shift of the Pt d-band center and boosted the catalytic activity and anti-CO poisoning ability for alkaline MOR.
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Environmental Progress & Sustainable Energy
·
2023
·Vol. 42
·期 6
·e14161
·
IF 2.8
Jie Cao,Fatao Zhang,Ting Xiao,Lihua Jiang,Weifeng Chen,Xinyu Tan
Utilizing the low-cost catalysts with excellent catalytic activities to replace the expensive ones for H 2 evolution still faces great challenges. It is significant to design the new catalysts with the synergistic effect to improve the activities and decrease the cost of the applications. Herein, the novel nanocatalyst of graphene quantum dots loaded bimetallic nanoparticles (Pt-Co/GQDs) has been synthesized for the H 2 evolution from hydrolysis of amine borane (AB) for the first time. The result indicates that the Pt-Co/GQDs nanocatalyst holds the better catalytic activities than Pt/GQDs, exhibiting the bimetallic synergies in the hydrolysis process. The synthesized catalyst has been characterized by various measurements, such as TEM, XPS, EDS, UV–Vis, and PL spectra. The effect of the catalyst on the hydrolysis of AB is investigated. It is demonstrated that the value of total turnover frequencies (TOFs) can arrive to 520 mol H 2 ·mol Pt −1 ·min −1 via the catalyst designing, which is very high in comparison with other reported catalysts. This work has developed an effective nanocatalyst with a lower cost which is never reported in the hydrolysis of AB, possessing both great significance and huge potential in the H 2 evolution by hydrolysis of the hydrogen storage materials.
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Journal of the Taiwan Institute of Chemical Engineers
·
2022
·
IF 5.477
Shangyan Zhou,Wei Liao,Zhengcheng Wang,Qian Zhou,Jin Long,Meida Chen,Qingmei Wang
Background Developing an economical and durable high-activity Pt-based electrocatalyst to alleviate the slow kinetics of the oxygen reduction reaction (ORR) is crucial for fuel cells. The shape-controllable Pt 3 Ni alloy catalyst with high electrocatalytic properties is regarded as one of the most efficacious electrocatalysts capable of accelerating ORR kinetics. Methods Here, sub-3 nm Pt-rich Pt 3 Ni dodecahedrons (DCs) has been developed via surfactant-driven shape evolution route as effective electrocatalysts for ORR. Significant findings The Pt 3 Ni DCs exhibit 4.3-fold improvement for mass activity and 4.7-fold improvement for specific activity respect to pristine Pt/C catalyst. Moreover, the remaining specific activity on Pt 3 Ni DCs is 6.7 times larger relative to pristine Pt/C catalyst after 20,000 scanning cycles. Such electrocatalytic performance enhancement is attributed to the ensemble effect including the dodecahedrons shape and synergistic effect between Pt and Ni atoms. We believe that our synthetic approach would provide new avenues toward the formation of polyhedron structures.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 4
·1767-1776
·
IF 3.925
Mu Zhou,Shuangde Li,Shaohua Chai,Tao Wang,Linfeng Nie,Yunfa Chen
A bifunctional adsorption-catalysis system for the abatement of trace amounts of toluene was developed and realized by loading different amounts of Pt on mesoporous silica synthesized with ionic liquid with hydrophobic modification. The textural properties were evaluated using BET, contact angle, XRD, IR, XPS, TEM, and H2-TPR techniques. The capability of the synthesized catalysts for room-temperature adsorption and low-temperature catalysis of toluene was appraised. The hydrophobic sample exhibited better toluene adsorption capacity of 53.1 mg g−1 than SiO2-350 and 3.0Pt/SiO2 samples with 28.3 mg g−1 and 18.9 mg g−1, respectively. Furthermore, the hydrophobic sample showed increased maximum desorption temperatures of 52 °C in comparison with those at 44 °C and 37 °C, which acted as a good adsorption buffering system. 3.0Pt/SiO2-H showed the best toluene conversion capacity at T90 = 129 °C, together with superior water vapor resistance and sequential capture-destruction performances. The increased bifunctional adsorption-catalysis performance with hydrophobic modification may be ascribed to the change in surface functional groups. The prepared system could be a valuable candidate material for adsorption-catalysis integration and assistance for VOCs elimination technology in barren waste gases.
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Small
·
2023
·Vol. 19
·期 18
·2207240
·
IF 13.3
Yuanmeng Zhao,Yunhao Jiang,Yan Mo,Yueming Zhai,Juejing Liu,Andrew C. Strzelecki,Xiaofeng Guo,Changsheng Shan
It is critical to develop high-performance electrocatalyst for electrochemical nonenzymatic glucose sensing. In this work, a single-atom Pt supported on Cu@CuO core–shell nanowires (Pt 1 /Cu@CuO NWs) for electrochemical nonenzymatic glucose sensor is designed. Pt 1 /Cu@CuO NWs exhibit excellent electrocatalytic oxidation toward glucose with 70 mV lower onset potential (0.131 V) and 2.4 times higher response current than Cu NWs. Sensors fabricated using Pt 1 /Cu@CuO NWs also show high sensitivity (852.163 µA mM −1 cm −2 ), low detection limit (3.6 µM), wide linear range (0.01–5.18 µM), excellent selectivity, and great long-term stability. The outstanding sensing performance of Pt 1 /Cu@CuO NWs, investigated by experiments and density functional theory (DFT) calculations, is attributed to the synergistic effect between Pt single atoms and Cu@CuO core–shell nanowires that generates strong binding energy of glucose on the nanowires. The work provides a new pathway for exploring highly active SACs for electrochemical nonenzymatic glucose sensor.
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