Advanced Electronic Materials
·
2025
·
IF 5.3
Mingxing Cao,Zhigao Zhang,Jian He,Ruifen Hou,Wenjie Gong,Zhihong Wang
Tungsten telluride (WTe 2 ) and silver telluride (Ag 2 Te) are recently developed magnetoresistive materials, and bulk composites of these materials would be extremely advantageous in improving the magnetoresistance characteristics of the individual components and expanding their applications. In this study, previously developed synthesis methods for WTe 2 and Ag 2 Te are applied to effectively engineer WTe 2 and Ag 2 Te bulk composites. Introducing 10% Ag 2 Te in the WTe 2 matrix improves the magnetoresistance and lowers the critical magnetic field and higher onset temperature relative to those of pure-phase WTe 2 . The relationship between the magnetoresistance performance and Ag 2 Te content is further explored using simulations. The onset temperature and critical magnetic field follow the Kohler rule based on resistance calculations. The excellent composite magnetoresistance of these materials will find applications in the field of electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Mingyang Liu,Qi Li,Xudong Xiao,Xuena Ma,Xiaoqin Xu,Yihang Yin,Bin Zhang,Minghui Ding,Jinlong Zou,Baojiang Jiang
Interface engineering has been recognized as one of the most promising strategies for tuning the catalytic properties of catalysts. However, building well-defined nanointerfaces for efficient oxygen reduction/evolution reactions (ORR/OER) remains a challenge. Herein, a hollow heterostructure composed of highly-dispersed CoTe 2 inside the mesoporous walls of nitrogen-doped carbon nanoboxes and uniformly-dispersed NiTe 2 outside the mesoporous walls (H-CoTe 2 /NiTe 2 @NCBs) is designed via a ZIF67-involved etching-anchoring-tellurization strategy. Promising half-wave potential of 0.86 V and overpotential of 320 mV at 10 mA cm −2 are obtained by H-CoTe 2 /NiTe 2 @NCBs. The excellent ORR/OER activity of H-CoTe 2 /NiTe 2 @NCBs is ascribed to the synergistic coupling based on nanointerfaces between CoTe 2 and NiTe 2 . Density functional theory calculations confirm that the nanointerface-based electronic coupling between CoTe 2 and NiTe 2 facilitates the charge transfer between two components and generates abundant catalytically active sites at the heterointerface, thereby significantly promoting the ORR/OER activities. This work provides the design principles for transitional bimetallic tellurides as bifunctional electrocatalysts.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Advances
·
2020
·Vol. 2
·期 3
·1333-1339
·
IF 0
Ye Zhang,Qi You,Weichun Huang,Lanping Hu,Jianfeng Ju,Yanqi Ge,Han Zhang
It is widely known that the excellent intrinsic electronic and optoelectronic advantages of bismuthene and tellurene make them attractive for applications in transistors and logic and optoelectronic devices. However, their poor optoelectronic performances, such as photocurrent density and photoresponsivity, under ambient conditions severely hinder their practical application. To satisfy the demand of high-performance optoelectronic devices and topological insulators, bismuth telluride nanoplates (Bi2Te3 NPs) with different sizes, successfully synthesized by a solvothermal approach have been, for the first time, employed to fabricate a working electrode for photoelectrochemical (PEC)-type photodetection. It is demonstrated that the as-prepared Bi2Te3 NP-based photodetectors exhibit remarkably improved photocurrent density, enhanced photoresponsivity, and faster response time and recovery time in the UV-Vis region, compared to bismuthene and tellurene-based photodetectors. Additionally, the PEC stability measurements show that Bi2Te3 NPs have a comparable long-term stability for on/off switching behaviour for the bismuthene and tellurene-based photodetectors. Therefore, it is anticipated that the present work can provide fundamental acknowledgement of the optoelectronic performance of a PEC-type Bi2Te3 NP-based photodetector, shedding light on new designs of high-performance topological insulator-based optoelectronic devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 2
·486-494
·
IF 2.047
Wang Xiaochun,Zhou Zhiwei,Lin Xuesong
In this work, we introduced two-dimensional (2D) WSe 2 with the lowest heat conductivity to enhance thermoelectric properties of the non-toxic and cost-effective SnTe. On one hand, the improved power factor can be attributed to the enhancement of Seebeck coefficient due to the decrease of low-energy carriers and minority carriers by the addition of WSe 2 -SnTe p - p -type heterojunction interface barriers. On the other hand, the thermal conductivity also decreased sharply by the heightened phonon scattering from the high-density stacking faults and multiscale hierarchical architectures. Ultimately, benefiting from the dual regulation effect of the introduction of 2D WSe 2 on the electro-acoustic decoupling, an improved figure of merit ( ZT ) of 1.0 is achieved for the composition of SnTe + 6 wt% WSe 2 at 873 K, which is enhanced by 134% in comparison with the pure SnTe sample. Moreover, the meaningful attempt represents an effective and feasible strategy for mixing SnTe with other compounds by the method of ball milling. Graphical Abstract
研究领域:
材料科学
·
热电学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Zhiwei Zhou,Junyou Yang,Qinghui Jiang,Xuesong Lin,Jiwu Xin,Abdul Basit,Jingdi Hou,Bingyang Sun
In this work, the co-doping in both the anion and cation sites of SnTe has been implemented by addition of BiCl 3 and the effect of co-doping on thermoelectric performance of SnTe-based materials has been studied detailedly. Benefitting from the sharp reduction of carrier concentration and the increase of density of states due to the electron donor contribution of Bi and Cl, the electrical transport properties have been improved greatly; moreover, the hierarchical architectures such as the point defects , dislocations, nano-particles and phase/grain boundaries act as multiscale phonon scattering centers and effectively suppress the transport of phonons in wide frequency range, thus reduced the thermal conductivity dramatically. Due to the synergistic regulation of cation-anion co-doping, a maximum ZT of ~1.27 at 873 K has been obtained in the sample of SnTe doping with 4% BiCl 3 , which enhances by 182% in comparison with the pristine sample.
研究领域:
材料科学
·
热电材料
✓ 已验证
产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2021
·Vol. 7
·期 12
·2000893
·
IF 7.295
Mingxing Cao,Zhihong Wang,Liwen Ma,Liwen Zhang,Man Wang,Yangsi Liu,Jian He,Xiaoli Xi
Tungsten ditelluride (WTe 2 ) is arising as an attractive material in magnetoresistance (MR) properties filed. The magnetoresistance properties of WTe 2 makes it an ideal material for its magnetoresistive heads of computer and magnetic sensor device applications. So far, people have developed various controlled synthesis methods to produce large-quantity uniform flat WTe 2 crystals. Nevertheless, none of the methods are sustainable, some methods use reducing gases, and some use very long heat preservation, and the process is very complicated. Here, a mild and fast self-flux method is described for WTe 2 synthesis that can avoid producing reducing gases. After conducting structural and physical tests, it is found that annealing time is critical for WTe 2 structure formation. Long annealing time improves the crystallinity of WTe 2 and makes its texture more obvious, increasing the conductivity of WTe 2 . Therefore, it will lead to the anomalous nonsaturating positive magnetoresistance with different field dependent behaviors, reaching the ultrastrong magnetoresistive value of 1040% at 5 K and 14 T. The results provide a sustainable approach for uniform WTe 2 crystal synthesis, which will benefit the large-quantity production of WTe 2 magnetoresistive materials.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yang Xiang,Kun Xiong,Linjian Yu,Haidong Zhang,Jia Chen,Meirong Xia
It is of great significance to develop low cost, high-efficiency and environment-friendly electrocatalysts for hydrogen evolution reaction (HER) from water splitting. Herein, nickel telluride nanosheets grown on Ni Foam (NF) with three different crystal phases (NiTe, Ni 2.6 Te 2 and Ni 2.86 Te 2 ) are fabricated by one-step hydrothermal tellurization followed annealing process. The non-stoichiometric Ni 2.86 Te 2 /NF exhibits superior electrocatalytic HER performance compared to the NiTe/NF and Ni 2.6 Te 2 /NF, which is comparable to the state-of-the-art 20 wt% Pt/C catalyst at high current density. The Ni 2.86 Te 2 /NF only requires an overpotential of 348 mV to drive the current density of 200 mA cm −2 in a 1.0 M KOH electrolyte. Similarly, The Ni 2.86 Te 2 /NF delivered current densities of 200 mA cm −2 at the overpotential of 279 mV in 0.5 M H 2 SO 4 . Such excellent performance could be ascribed to the fast electron transfer and positive shift of d d-band center from its rich defective effect of crystal phase transition, as well as to the exposure of active sites provided by the two-dimensional nanosheets with large specific surface area. This work provides valuable insights for the rational modulation of the crystal phase on the nickel telluride for catalyzing HER.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaobo Bai,Chengyan Liu,Fucong Li,Zhongwei Zhang,Ying Peng,Ruifan Si,Baoquan Feng,Guojing Wu,Jie Gao,Haiqiao Wei,Lei Miao
Lead-free GeTe-based thermoelectric (TE) materials are most promising candidates to replace the environmentally harmful PbTe for TE application at middle temperature range, where high power factor ( PF ) is significantly important for high power generation if the cost of heat source is low enough. In this study, we report for the first time that the PF of GeTe can be greatly enhanced by tailoring the interaction between Te 5s 2 lone pair and antibonding orbitals, which is induced by the hybridization of Zr 4d 2 electrons with antibonding orbitals. As a result, the contribution of Ge 4s 2 electrons to the valence band is promoted, leading to the band sharpening at the valence band maximum in rhombohedral phase, and simultaneous band sharpening at the valence band maximum and band flattening at the conduction band minimum in cubic phase. Lower band effective mass m b * effectively increases the carrier mobility to a very high value of ∼121 cm −2 V −1 s −1 (300 K), and the Seebeck coefficient is improved by the reduced detrimental effect of minority carrier in cubic phase, enhancing the maximum PF up to a record value of ∼5503 μW m −1 K −1 . With the assistance of reduced thermal conductivity, a peak zT of ∼1.9 is achieved at 673 K, which is one of the highest values among single doped GeTe. This work provides a new guidance to enhance the TE performance of GeTe-based materials.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 4
·2628-2632
·
IF 1.134
Gao Yuan,Wang Ka,Song Haizeng,Wu Han,Yan Shancheng,Xu Xin,Shi Yi
As a new topological insulator material, the β-phase silver telluride (Ag2Te) nanowire is a narrow bandgap semiconductor, which is attractive for its excellent properties. In this study, Ag2Te nanowires were synthesized by one-step hydrothermalmethod.
The nanowires showed good electrical properties with maximum drain-source voltage of 1.5 V, and the output current was up to 20 μA. The gate voltage has a significant effect on output current for the device. The Ag2Te nanowires will have more extensive and in-depth applications
in the fields of optoelectronics and thermoelectricity.
研究领域:
材料科学
·
纳米技术
·
电子工程
✓ 已验证
DOI
PubMed
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 34
·15989-15997
·
IF 7.233
Panpan Zhang,Fulai Zhao,Peng Long,Yu Wang,Yuchen Yue,Xuanyu Liu,Yiyu Feng,Rongjin Li,Wenping Hu,Yu Li,Wei Feng
We describe sonication-assisted liquid-phase exfoliation of rhombohedral germanium telluride (α-GeTe) to obtain a good dispersion of α-GeTe nanosheets in ethanol. The thickness of the α-GeTe nanosheets is dependent on the exfoliation conditions, and few-layer α-GeTe nanosheets of 2–4 layers and even monolayer α-GeTe were obtained. We use first-principles calculations to investigate the structural, electronic, and optical properties of monolayer and bulk α-GeTe and compare the optical band gap of centrifugally fractionated α-GeTe nanosheet dispersions with the computational predictions. We demonstrate that few layer α-GeTe nanosheets are purified selectively through centrifugation, and they exhibit high sensitivity to Fe3+. The scalable production of two-dimensional α-GeTe nanosheets can be used in the future optoelectronic industry.
研究领域:
材料科学
·
化学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
Cell Reports Physical Science
·
2020
·
IF 0
Yi Han,Wenwen Cai,Xueke Wu,Wenjing Qi,Bin Li,Hongdong Li,Dan Zhang,Yue Pan,Zuochao Wang,Jianping Lai,Lei Wang
To date, the development of the nitrogen reduction reaction (NRR) electrocatalysts to achieve high ammonia production at low overpotentials is insufficient. Here, Sb 2 Te 3 displays notable electrochemical NRR performance at 0 V (versus RHE), with an ammonia yield rate of 13.8 μg h −1 cm −2 and a faradic efficiency of 27.7% (the highest yield rate at low overpotentials reported, to the best of our knowledge). Sb 2 Te 3 is also stable over 50 h. Density functional theory (DFT) calculations disclose that there are multiple promoted-synergetic effects in telluride. Tellurium sites can modulate the electronic structure of catalysts to drive nitrogen adsorption on antimony sites. Tellurium sites also allow surface hydrogenation to suppress hydrogen evolution, facilitate the reduction of nitrogen into ∗NNH (the rate-determining step) in NRR, and accelerate the desorption of NH 3 . The other tellurides (CoTe 2 , CdTe, and Bi 3 Te 4 ) also show high NRR performance at low overpotentials, implying that such multiple promoted-synergism may be generalized.
研究领域:
材料科学
·
化学工程
·
理论计算
✓ 已验证
DOI
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yiyang Chen,Jiawei Zhu,Ningxuan Xue,Xinyu Gai,Da Teng,Chen Wei,Fengling Liu,Zhaobing Guo,Yalin Yu,Pengxiang Qiu
Electrocatalytic reduction of nitrate (NO 3 - ) to ammonia (NH 3 ) provides a green and moderate alternative to the Haber-Bosch method. Yet, the NH 3 Faradaic efficiency (FE) is limited by the generation of byproducts and the occurrence of competitive hydrogen evolution reactions. The development of electrocatalysts for NO 3 - reduction to NH 3 with high activity and selectivity remains a significant challenge. Herein, we designed tellurides with electron-rich Ni sites grown on copper foam (Ni 3 Te 2 /Cu), which have been demonstrated to possess superior catalytic activity for electrochemical conversion of NO 3 - to NH 3 , with a maximum NO 3 - conversion rate of 100% and the FE was 96.78% at -0.49 V vs RHE and pH=7. The experimental results confirmed that the excellent NO 3 - reduction activity was attributed to the outstanding characteristic of tellurides and the formation of electron-rich Ni sites. Theoretical calculations further indicated that the tight binding of Cu and electron-rich Ni promotes NO 3 RR activity.
研究领域:
电化学
·
催化材料
·
环境科学
✓ 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）