Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Lijia Zhou,Xiangjiang Dong,Qiang Li,Xianran Xing
We systematically investigated the superconducting properties of 2H-PtxTaS2 (0 ≤ x ≤ 0.08). As the platinum (Pt) content increases, the charge density wave (CDW) in 2H-TaS2, which appears at approximately 75 K, is progressively suppressed and completely disappears in Pt0.06TaS2. Meanwhile, the superconducting transition temperature (Tc) first increases and then decreases, reaching its maximum value of approximately 4.85 K at x = 0.06. This phenomenon suggests a competitive interplay between CDW and superconductivity (SC) in this system. Further measurements of the superconducting parameters of Pt0.06TaS2 indicate that the enhancement of Tc is primarily attributed to an increase in the density of states at the Fermi level.
研究领域:
凝聚态物理
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Nano
·
2021
·
IF 8.109
B. Yi,H. Zhao,L. Cao,X. Si,Y. Jiang,P. Cheng,Y. Zuo,Y. Zhang,L. Su,Y. Wang,C.-K. Tsung,L.-Y. Chou,J. Xie
Mixed-metal metal-organic frameworks (MM-MOFs) contain more than one type of metal node, which can improve or even introduce new features compared with the single metal frameworks. Traditionally, most of the MM-MOFs are synthesized by solution method which requires all the metal ions to form stable coordination with the ligand in a single framework and therefore limits the choice of the metal ions. In this work, Pt-doped Zn-MOF-74 (PtZn-MOF-74) has been prepared through a mechanochemical conversion approach from Pt-doped ZnO (Pt–ZnO) directly. The absence of a large quantity of solvent limits the solvation and diffusion of growth species during the mechanochemical conversion and therefore prevented the agglomeration of Pt dopants in PtZn-MOF-74. CO oxidation was used to evaluate the catalytic performance of the prepared MM-MOFs. Compared with inert Zn-MOF-74, PtZn-MOF-74 with unsaturated coordinated Pt at elevated temperature can act as the active sites to catalyze CO oxidation reaction. This study provides a novel design strategy for the synthesis of MM-MOFs with extended functionalities.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Pei Liu,Hongyu Chen,Caiyuan Zhao,Deng Long,Weijia Chen,Miao Lu,Xinyi Chen
A quadruple 2H transition metal dichalcogenide of platinum doped molybdenum selenide sulfide (MoSSe) has been achieved. The critical doping amount of Pt is estimated to be approximately 0.9 a.t.% to prevent the formation of a heterogeneous phase. It has been observed that the excess Pt beyond this critical doping level cannot be settled into the lattice of MoSSe but forms an independent metal phase of Pt nanoparticles, composing a heterostructure with MoSSe, in which the behavior of photogenerated electrons will be predominantly governed by metal Pt and transported along the pathways for gas production in the photocatalytic CO 2 reduction. However, as long as Pt can be located in the lattice of MoSSe, the elemental variety of Pt doped MoSSe has provided various active sites during the photocatalytic CO 2 reduction process, favoring the localized coupling of matching intermediates, consequently enhancing the production of high value-added liquid products. In essence, the successful integration of Pt into the 2H MoSSe lattice opens up diverse active sites, optimizing the photocatalytic performance on the selectivity of liquid production reduced from CO 2 .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 61
·35646-35654
·
IF 3.049
Caiyun Wang,Lirong Zeng,Wei Guo,Cairong Gong,Jing Yang
In this study, a series of perovskite oxides LaCo1−xPtxO3−δ (x = 0, 0.02, 0.04, 0.06, and 0.08) were prepared by the citric acid–ethylenediaminetetraacetic acid (CA–EDTA) complexing sol–gel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Then, the samples were investigated as OER and HER bifunctional electrocatalysts in alkaline media. Compared with other catalysts, LaCo0.94Pt0.06O3−δ had good stability and presented more activity at a lower overpotential of 454 mV (at 10 mA cm−2), a lower Tafel slope value of 86 mV dec−1 and a higher mass activity of 44.4 A g−1 for OER; it displayed a lower overpotential of 294 mV (at −10 mA cm−2), a lower Tafel slope value of 148 mV dec−1 and a higher mass activity of −34.5 A g−1 for HER. The improved performance might depend on a larger ECSA, faster charge transfer rate and higher ratio of the highly oxidative oxygen species (O22−/O−). Furthermore, the eg orbital filling of Co approaching 1.2 in the B site might play a leading role.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2021
·Vol. 17
·期 52
·2104245
·
IF 13.281
Liyuan Pei,Haohui Qiao,Bin Chen,Xiaodong Zhu,Ruth Anaya Davis,Keyu Zhu,Lei Xia,Pei Dong,Mingxin Ye,Jianfeng Shen
The demand of clean energy calls for efficient and low-cost hydrogen evolution reaction electrocatalysts. Fabricating hybrid catalysts from noble/non-noble catalysts is a practical route to reducing the consumption of noble metals and enhancing catalytic efficiency. Here, 2H-MoS 2 is etched and edge-doped with Pt nanoparticles using focused ion beam and photoreduction techniques. Precise comparison of as-prepared samples demonstrates that the enhancement of catalytic performance can be controlled through tuning the catalyst defect length. On this basis, remarkably high performance is obtained by designing a specific defect array that is superior to commercial Pt/C with less Pt loading and higher mass activity. It has been proved by experimentation and COMSOL Multiphysics simulations that the promotion of catalytic activity not only benefits from the synergistic effect of Pt and edge active sites, but also contributes to the increased potential at the edges of the designed defect. This study sheds light on the mechanism of understanding nanoscale edge-doped hybrid catalysts and provides a feasible strategy for the full utilization of noble metals.
研究领域:
材料科学
·
电催化
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yan Wang,Chong Li,Xuejin Li,Jinghan Zhang,Xinghong Chen,Xueming Hong,Jingting Luo,Zhenglong Sun,Fujian Ren,Ran Tao,Yuzhi Chen
The detection of toxic ammonia (NH 3 ) gas across multiple channels at room temperature, especially under complex conditions, consistently presents a significant challenge. In this paper, a plasmonic Pt-doped SnO 2 enhanced quantum wires NH 3 gas sensor is constructed on a 125-µm communication fiber with easy networking. To enhance usability in confined areas, the sensor features a compact plug-in fiber probe design. The plasmonic Pt-doped SnO 2 enhanced quantum wires coating boosts the interaction between NH 3 gas molecules and oxygen adsorbed on the wires' surface, modulating the plasmonic optic signal. We present and compare two optical modulation methods-wavelength and intensity-for our NH 3 gas probe. Our sensor achieves an impressive intensity sensitivity of -10.45 a.u./ppm at room temperature with a rapid response time of 3.8 s. Furthermore, intensity modulation offers an exceptionally low detection limit of 287 ppb, with minimal susceptibility to temperature and humidity variations. The proposed fiber NH 3 gas probe exhibits commendable specificity, repeatability, stability, and cost-effectiveness, along with flexibility in light source and receiver choices, making it ideal for NH 3 gas detection applications.
研究领域:
材料科学
·
光学工程
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 5
·期 4
·1059-1066
·
IF 5.503
Xin Xiao,Dongping Sun,Xiaoheng Liu,Bo Qiu,Xingyou Xu,Dongen Zhang,Tao Yang
It is still a challenge to design an efficient and low-cost electrocatalyst for the hydrogen evolution reaction (HER) in an alkaline electrolyte. Herein, ultra-low amount Pt-doped Co2P/Ni2P on nickel foam (Pt/Co2P/Ni2P/NF) was facilely synthesized via an in situ controlled growth and used as an efficient electrocatalyst for electrolytic water splitting into hydrogen. Pt/Co2P/Ni2P/NF was achieved by a two-step procedure that was conducted by the hydrothermal approach to obtain the precursor, followed by a subsequent in situ phosphorization procedure. Due to the NF substrate being supermacroporous, more active sites of Pt/Co2P/Ni2P/NF could be exposed, improving electron transport and providing open-channels for the rapid release of H2. Pt/Co2P/Ni2P/NF exhibited remarkable electrocatalytic performance towards HER with an overpotential of 75 mV at 10 mA cm−2 in an alkaline electrolyte and a small Tafel slope of 64 mV dec−1. This work provided a facile and reliable synthetic approach to improve transition metal phosphides (TMPs) for electrocatalytic HER performance in alkaline electrolytes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xun Li,Heng He,Tian Tan,Zhihan Zou,Zhanyou Tian,Wanling Zhou,Yuwen Bao,Xiaohong Xia,Yun Gao
Low power consumption is a new emerged requirement for methane sensors long-term working in a gas supervisory control system. Great challenges remain in development of heat free methane sensors based on metal oxide semiconductors (MOS). In this work, Pt-doped SnO 2 (Pt-SnO 2 ) grow on well aligned ZnO nanorod-array to form an inter-staggered double-layer structure on AZO glass by a two-step hydrothermal method, with the annealing temperature being systematically studied. The optimized processing parameters are 1 at% Pt doping content and 700 °C annealing temperature, offering the best sensing response of 3.36 to 800 ppm CH 4 at room temperature. SnO 2 /ZnO without Pt doping shows linear I-V relationship, while the Pt-SnO 2 /ZnO shows a Schottky-like I-V curve with the Schottky barrier height decreases as increasing the CH 4 concentration. The activation energy (Δ E a ) for CH 4 dissociation decreases with increasing the annealing temperature, and the Δ E a of the optimized Pt-SnO 2 /ZnO sample is only one-third of that in the SnO 2 /ZnO. In addition to the piezoelectric polarization electric field in ZnO, the build up Schottky-like barrier and the reduced activation energy via Pt doping and annealing are demonstrated to be efficient for enhancing the methane sensing performance at low operation temperature.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Lv Wen,Yang Jianhua,Xu Qingda,Mehrez Jaafar Abdul-Aziz,Shi Jia,Quan Wenjing,Luo Hanyu,Zeng Min,Hu Nantao,Wang Tao,Wei Hao,Yang Zhi
Real-time and accurate biomarker detection is highly desired in point-of-care diagnosis, food freshness monitoring, and hazardous leakage warning. However, achieving such an objective with existing technologies is still challenging. Herein, we demonstrate a wireless inductor-capacitor (LC) chemical sensor based on platinum-doped partially deprotonated-polypyrrole (Pt-PPy + and PPy 0 ) for real-time and accurate ammonia (NH 3 ) detection. With the chemically wide-range tunability of PPy in conductivity to modulate the impedance, the LC sensor exhibits an up-to-180% improvement in return loss ( S11 ). The Pt-PPy + and PPy 0 shows the p-type semiconductor nature with greatly-manifested adsorption-charge transfer dynamics toward NH 3 , leading to an unprecedented NH 3 sensing range. The S11 and frequency of the Pt-PPy + and PPy 0 -based sensor exhibit discriminative response behaviors to humidity and NH 3 , enabling the without-external-calibration compensation and accurate NH 3 detection. A portable system combining the proposed wireless chemical sensor and a handheld instrument is validated, which aids in rationalizing strategies for individuals toward various scenarios.
研究领域:
生物医学工程
·
化学传感
·
物联网技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Qiuyu Li,Tingting Wan,Xianlong Yang,Dong Xiang,Xiaoyou Yuan,Zhenjie Sun,Peng Li,Manzhou Zhu
Pd-based catalysts are attractive anodic electrocatalysts for direct methanol fuel cells owing to their low cost and natural abundance. However, they suffer from sluggish reaction kinetic and insufficient electroactivity in methanol oxidation reaction (MOR). In this work, we developed a facile one-pot approach to fabricate low Pt-doped Pd12P3.2 nanowires with crystalline/amorphous heterophase (termed Pt-Pd12P3.2 NWs) for MOR. The unique crystalline/amorphous heterophase structures promote the catalytic activity by the plentiful active sites at the phase boundaries and/or interfaces and the synergistic effect between different phases. Moreover, the incorporation of trace Pt into Pd lattices modifies the electronic structure and improves the electron transfer ability. Therefore, the obtained Pt-Pd12P3.2 NWs display significantly enhanced electrocatalytic performance toward MOR with the mass activity of 2.35 A mgPd+Pt–1, which is 9.0, 2.9, and 2.0 times higher than those of the commercial Pd/C (0.26 A mgPd–1), Pd12P3.2 NWs (0.82 A mgPd–1), and commercial Pt/C (1.19 A mgPt–1). The high mass activity enables the Pt-Pd12P3.2 NWs to be the promising Pd-based catalysts for MOR.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xinjie Deng,Xin Huang,Haijuan Du,Shaobo Wang,Chaoyang Deng,Yazhong Qu,Xu Li,Zengbei Li,Xianyang Yue
Photocatalytic degradation technology is a promising strategy for the water treatment, which has many advantages such as saving time, cleanliness and environmental friendliness . In this study, ultra-low amount (0.01 wt%) of nano platinum (Pt) obtained from one-pot reduction method, was doped onto zinc oxide (ZnO) to form a lamellar nanoflower (Pt-ZnO). The characterization of Pt-ZnO was put forwards via scanning electron microscopy, high-angle annular dark-field scanning transmission election microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, liquid chromatography-mass spectrometry, etc. The highest degradation efficiencies of methylene blue (MB), rhodamine B (Rh B), methylene orange (MO), and acid black ATT (ATT) after being treated by Pt-ZnO for about 60 min reached 99.9%, 99.9%, 96.0%, and 97.8% respectively. While the MB and Rh B remained at a degradation efficiency of 99.9% even after being reused 5 times. Surprisingly, Pt-ZnO showed the removal rate of industrial effluent containing acid dyes was 93.9% and the chemical oxygen demand (COD) of wastewater was significantly reduced. Experimental results of LC-MS and free radical scavenging testing indicated MB was mainly split through the continuous open-ring cleavage of C-N bond in N, N-dimethylamine group by · OH, and finally decomposed into H 2 O and CO 2 achieving the decolorization .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2025
·
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.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）