ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yajie Guo,Fuxian Zheng,Ting Wang,Xinyang Liu,Xiaotan Tian,Konggang Qu,Lei Wang,Rui Li,Wenjun Kang,Zongge Li,Haibo Li
Palladium (Pd)-transition metal alloys have the potential to regulate the intermediate surface adsorption strength in oxygen reduction reactions (ORR), making them a promising substitute for platinum-based catalysts. Nonetheless, prolonged electrochemical cycling can lead to the depletion of transition metals, resulting in structural degradation and poor durability. Herein, the synthesis of alloy catalysts (Pd25%Te75%) containing Pd and the metalloid tellurium (Te) through a one-step reduction method is reported. Characterizations of powder X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy demonstrated both uniform dispersion and strong binding force of elements within the PdTe alloy, along with providing crystallographic details of associated compounds. Based on density functional theory calculations, PdTe had a more negative d-band center than that of pure Pd, which reduces the adsorption capacity between active sites and intermediates in the ORR, and therefore enhances reaction kinetics. The Pd25%Te75% exhibited excellent ORR activity, and its onset and half-wave potentials were ∼0.98 and ∼0.90 V, respectively, at 1600 rpm within the O2-saturated 1.0 M KOH. Significantly, accelerated durability tests achieved exceptional stability, and half-wave potential just decayed by 4 mV after 30000 consecutive cycles. Moreover, this study aims to promote the preparation of Pd and metalloid alloys for other energy conversion applications.
研究领域:
材料科学
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电化学
·
催化科学
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DOI
PubMed
高影响因子
ORGANIC ELECTRONICS
·
2018
·
IF 3.68
Qiufeng Meng,Qinglin Jiang,Kefeng Cai,Lidong Chen
PEDOT:PSS coated Te (PC Te) nanorod/PEDOT:PSS composite films were prepared by a drop-casting technique. H 2 SO 4 treatment was employed to enhance thermoelectric (TE) properties of the composite films. The addition of PC Te nanorods increased both the electrical conductivity and the Seebeck coefficient of the composite films. An optimized power factor of 141.9 μW/mK 2 was obtained for the film containing 90 wt% PC Te nanorods treated with 12 M H 2 SO 4 at room temperature , which was 2.75 times as high as that of the untreated composite film, corresponding to the electrical conductivity and Seebeck coefficient of 204.6 S/cm and 83.27 μV/K, respectively. XPS and GIWAXS analysis revealed the removal of insulating PSS units and the rearrangement of PEDOT chains after the H 2 SO 4 treatment. Finally, a 9-leg TE generator prototype was fabricated using the optimized composite film. The maximum output power and area output power density produced from the prototype were 47.7 nW and 57.2 μW/cm 2 , respectively, at the temperature difference of 40 K.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Mingyan Qin,Junpeng Zhu,Yuting Zou,Mingxiu Liu,Chunlu Chang,Huaiyu Xiang,Yaru Shi,Weijia Wang,Xilang Shen,Shaojuan Li
Spectral information, reflecting the interaction between light and matter across different wavelengths, is essential for identifying material properties and environmental changes. To meet the demand for compact spectral sensors, we constructed a type-I band-aligned MoTe 2 /Te van der Waals (vdW) heterostructure through precise band structure design, where the drain–source voltage ( V ds ) electrostatically tunes interfacial band alignment to complement gate voltage ( V gs ) modulation. By synergistically tuning the V gs and V ds , we achieved a wavelength-dependent photoresponse and constructed a spectral responsivity matrix. Integrated with an attention-guided multilayer perceptron (MLP) algorithm that incorporates the device's responsivity as prior physical information, the device functions as a miniaturized spectrometer, demonstrating narrowband spectral reconstruction with an optimal resolution of 6 nm across a broadband range from 500 to 780 nm at room temperature. The noncentrosymmetric crystal structure of Te also endows the device with the capability of simultaneous polarization discrimination. This work provides a promising approach toward multifunctional on-chip spectrometers capable of simultaneous spectral and polarization analysis.
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DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 8
·2530
·
IF 3.5
Junting Zhang,Jiexin Chen,Shuojia Zheng,Da Zhang,Shaojuan Luo,Huixia Luo
HighlightsWhat are the main findings?A facile chemical strategy was developed for the synthesis of two-dimensional Te-doped GeH nanostructures with atomic-level precision and structural integrity.The Te-GeH-based photoelectrochemical (PEC) photodetectors exhibit high responsivity (708.5 µA/W) and ultrafast response speeds (92 ms rise/526 ms decay) under zero-bias conditions, demonstrating excellent broadband photoresponse.What is the implication of the main finding?The introduction of Te atoms enables effective modulation of the electronic structure in the GeH system. Owing to the comparable atomic radius between Te and Ge, efficient doping is achieved without disrupting the host lattice. In addition, the high electronegativity of Te induces electron redistribution and facilitates the formation of a built-in electric field, thereby optimizing charge separation and transport behavior. This approach provides a novel pathway for the functional design of Zintl-phase-derived two-dimensional materials, with broad implications for advanced optoelectronic applications.This doping strategy significantly enhances the photoelectrochemical performance of GeH-based photodetectors and enables the scalable fabrication of 2D nanomaterials with tunable optoelectronic properties. The resulting Te-GeH nanostructures offer improved carrier dynamics and reduced recombination, serving as a promising material platform for next-generation self-powered broadband photodetectors.Two-dimensional (2D) Xenes, including graphene where X represents C, Si, Ge, and Te, represent a groundbreaking class of materials renowned for their extraordinary electrical transport properties, robust photoresponse, and Quantum Spin Hall effects. With the growing interest in 2D materials, research on germanene-based systems remains relatively underexplored despite their potential for tailored optoelectronic functionalities. Herein, we demonstrate a facile and rapid chemical synthesis of tellurium-doped germanene hydride (Te-GeH) nanostructures (NSs), achieving precise atomic-scale control. The 2D Te-GeH NSs exhibit a broadband optical absorption spanning ultraviolet (UV) to visible light (VIS), which is a critical feature for multifunctional photodetection. Leveraging this property, we engineer photoelectrochemical (PEC) photodetectors via a simple drop-casting technique. The devices deliver excellent performance, including a high responsivity of 708.5 µA/W, ultrafast response speeds (92 ms rise, 526 ms decay), and a wide operational bandwidth. Remarkably, the detectors operate efficiently at zero-bias voltage, outperforming most existing 2D-material-based PEC systems, and function as self-powered broadband photodetectors. This work not only advances the understanding of germanene derivatives but also unlocks their potential for next-generation optoelectronics, such as energy-efficient sensors and adaptive optical networks.
研究领域:
材料科学
·
光学工程
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2025
·
IF 17.1
Feng Chen,Yuzhu Qian,Yaoyong Dong,Lijuan Chen,Ting Song,Yong Pei,Xianyou Wang,Xiongwei Wu,Bei Long
The rich valence states (−2 to +6) make elemental Te become a high-capacity electrode in aqueous batteries. The conversion process (Te to TeO 2 ) generates soluble Te 4+ species in aqueous electrolyte. The suppression of conversion process enables a long-term Te electrode at the cost of a partial storage capacity. Herein, a polyethylene glycol additive is introduced to regulate the electrolyte environment. The low H 2 O activity hinders Te 4+ species formation and therefore leads to the insertion-type Te electrode. The reshaped NH 4 + solvation structure facilitates the fast H 2 O removal and firm PEG adsorption on the electrode surface, also improving water-induced side reactions. This, coupled with the introduction of carbon host, contributes to a high-stability Te electrode. Theoretical and experiment studies reveal the reshaped NH 4 + solvation structure/hydrogen-bond network, the strong adsorption capability of B-doped carbon, and the inhibited Te dissolution. Additionally, a series of in/ex-situ characterizations prove the intercalation-type mechanism and the enhanced cycling stability. As a result, this elaborate electrode delivers a high reversible capacities of 376 mA h g −1 at 0.05 A g −1 and a long-term cycling stability with 73.8 % capacity retention at 5 A g −1 after 4500 cycles. This work provides a reference for the storage mechanism regulation in aqueous battery.
研究领域:
电化学
·
储能
·
材料科学
·
水系电池
·
电池技术
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产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2019
·Vol. 34
·期 4
·781-786
·
IF 0.605
Gao Peng,Chen Lilin,Wu Bo,Zhang Qiming,Xue Chao,Hou Chengyi,Sun Qiang
An optimal structure design of the lattice mismatched GaInP/GaInAs/Ge solar cell with high photoelectric conversion efficiency was proposed. Two-dimensional Bi 2 Te 3 and Sb 2 Te 3 nanosheets were prepared by solvothermal synthesis method used as thermoelectric (TE) functional materials, which is further hybrid with high conductive reduced graphene oxide (rGO) and carbon nanotubes (CNTs). TE film was then fabricated based on above materials. The power factor of the n -type TE film is 19.31 μW/mK 2 , and the power factor of the p -type TE film is 97.40 μW /mK 2 . The flexible TE device was integrated with flexible solar cell. Compared with the single photovoltaic (PV) cell, the efficiency of the as-prepared flexible integrated device measured under the AM1.5 illumination is significantly improved. The efficiency of the two parallel tests is increased from 27.26% and 26.59%, to 29.11% and 28.92%, respectively. The increasing ratio reaches 6.7%–8.8%.
研究领域:
可再生能源
·
材料科学
·
热电技术
·
光伏技术
·
纳米科技
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Dekang Huang,Shu Li,Xin Xiao,Minglei Cao,Lin Gao,Yong-Gang Xiang,Hao Chen,Yan Shen
Recently, tellurium has been regarded as a promising cathode material for rechargeable lithium-ion batteries due to its high theoretical volumetric capacity. However, a plethora of research are focusing on impregnating the tellurium into porous carbon materials by the thermal-diffusion method, which would consume large amounts of energy and take prolonged time. Herein, a carbon and binder-free cathode with 100% Te is fabricated by a facile galvanic replacement method on a nickle foam. Driven by the large electrochemical potential difference between Ni and Te, desirable amounts of Te can be obtained in just 10 min with no need of energy input. Li-Te batteries constructed by the as-obtained cathode show relatively good performance in DMSO solvent. To further elevate the performance of this battery especially at low current density , commercial carbon cloth is added between the separator and Te electrode as an interlayer. The cell with interlayer delivers a gravimetric capacity of 116.2 mAh g −1 after 70 cycles at the current density of 100 mA g −1 , which is 2.8 times as high as that of a cell without interlayer (40.4 mAh g −1 ).
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Xin He,Rongfei Wei,Xiangling Tian,Jianrong Qiu,Mei Zhang,Qingguang Zeng,Junyan Liu
Te-Bi 2 Te 3 alloy thin film has grown on silicon dioxide substrate by thermal evaporation technique. The Bi 2 Te 3 rhombohedral structure enriched Te in the prepared thin film was identified by high solution transmission electron microscopy (HRTEM), X-Ray diffraction (XRD), Raman spectrum and X-ray photoelectron spectroscopy (XPS). Interestingly, the Te-Bi 2 Te 3 alloy thin film presents a changeover from saturable absorption (SA) to reverse saturable absorption (RSA) as continuously increasing the input intensity, which has been investigated using the open-aperture (OA) z-scan measurement under a femtosecond-pulsed laser at 800 nm. A high modulation depth of 48.3% and large saturation intensity of 24.1GW/cm 2 of the thin film were obtained. Moreover, a large nonlinear absorption coefficient β of ∼10 3 cm/GW is increased with the input intensity elevated. The research results demonstrate that the Te-Bi 2 Te 3 alloy thin film could be an emerging optical material for saturable absorber in Q-switched or mode-locking fiber lasers at low incident intensity while serve as optical limiter at high incident intensity.
研究领域:
材料科学
·
凝聚态物理
·
光学工程
·
纳米材料
·
光电子学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 49
·1906585
·
IF 15.621
Xun Zhang,Jizhou Jiang,Abdulsalam Aji Suleiman,Bao Jin,Xiaozong Hu,Xing Zhou,Tianyou Zhai
Tellurium (Te), as an elementary material, has attracted intense attention due to its potentially novel properties. However, it is still a great challenge to realize high-quality 2D Te due to its helical chain structure. Here, ultrathin Te flakes (5 nm) are synthesized via hydrogen-assisted chemical vapor deposition method. The density functional theory calculations and experiments confirm the growth mechanism, which can be ascribed to the formation of volatile intermediates increasing vapor pressure of the source and promoting the reaction. Impressively, the Te flake-based transistor shows high on/off ratio ≈10 4 , ultralow off-state current ≈8 × 10 −13 A, as well as a negligible hysteresis due to reducing thermally activated defects at 80 K. Moreover, Te-flake-based phototransistor demonstrates giant gate-dependent photoresponse: when gate voltage varies from −70 to 70 V, I on / I off is increased by ≈40-fold. The hydrogen-assisted strategy may provide a new approach for synthesizing other high quality 2D elementary materials.
研究领域:
材料科学
·
纳米技术
·
凝聚态物理
·
光电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2016
·Vol. 18
·期 12
·1-9
·
IF 2.101
Song Haijun,Cai Kefeng,Shen Shirley
Firstly, tellurium (Te) nanorods with a high Seebeck coefficient have been integrated into a conducting polymer PEDOT/PSS to form PEDOT/PSS/Te composite films. The Seebeck coefficient of the PEDOT/PSS/Te (90 wt.%) composite films is ~191 μV/K, which is about 13 times greater than that of pristine PEDOT/PSS. Then, H 2 SO 4 treatment has been used to further tune the thermoelectric properties of the composite films by adjusting the doping level and increasing the carrier concentration. After the acid treatment, the electrical conductivity of the composite films has increased from 0.22 to 1613 S/cm due to the removal of insulating PSS and the structural rearrangement of PEDOT. An optimized power factor of 42.1 μW/mK 2 has been obtained at room temperature for a PEDOT/PSS/Te (80 wt.%) sample, which is about ten times larger than that of the untreated PEDOT/PSS/Te composite film.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Shupeng Sun,Xinlei Li,Nan Wang,Baoyu Huang,Xiaogan Li
The gas pollutant of Nitrogen dioxide (NO 2 ) can have a severe impact on human respiratory systems, with a potential threat to human health. Therefore, a NO 2 sensor is necessary to be implemented to have the information on exhaled low concentrations of NO 2 emitted from different sources. In this work, the tellurium nanotubes (Te NT) based heterojunction with SnO 2 nanoparticles (TeNT/SnO 2 ) for detecting ppb-level NO 2 at room temperature was developed. The TeNT /SnO 2 sensor exhibits a better response (25.3 %), and faster response time (32 s) to 600 ppb of NO 2 in comparison to pristine Te NT based sensors (7.9 % and 154 s). The promoted sensing properties including selectivity, signal repeatability, and long-term stability could be attributed to the formation of TeNT/SnO 2 heterojunctions. The density function theory (DFT) in accordance with the first principle was conducted to calculate the adsorption ability of the TeNT/SnO 2 heterojunctions. It indicates that the TeNT/SnO 2 heterojunctions facilitated the adsorption of oxygen (-0.635 eV) and NO 2 (-1.533 eV) in comparison to Te NT.
研究领域:
材料科学
·
环境科学
·
化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 4
·1711-1717
·
IF 10.733
Hongjing Wang,Shuli Yin,Chunjie Li,Kai Deng,Ziqiang Wang,You Xu,Xiaonian Li,Hairong Xue,Liang Wang
Design of a one-dimensional (1D) nanostructure with consecutive mesopores is significant for electrocatalytic applications. Herein, we proposed a facile wet-chemical method to synthesize superlong Pt|Te mesoporous nanotubes (Pt|Te MNTs) using tellurium (Te) nanowires (NWs) as a sacrificial template. Benefiting from the characteristics of the mesoporous and hollow nanotube structure, the Pt|Te MNTs show superior activity and durability in catalyzing the oxygen reduction reaction. The newly designed Pt|Te MNTs are very different from the traditional 1D structure with a smooth surface and solid interiors. The present facile strategy is highly valuable for the design of a 1D nanostructure with a mesoporous exterior and hollow interior.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 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）