Observation of band bending in WTe2 after surface oxidation

Chen, Ai-Xi; Li, Huifang; Huang, Rong; Zhao, Yanfei; Liu, Tong; Li, Zhi-Yun; Wang, Li; Chen, Feiyu; Ren, Wei; Lü, Shuai; Yang, Bingjie; Huang, Zhiwen; Ding, Sunan; Li, Fangsen

doi:10.1016/j.susc.2021.121956

Cited by 7 publications

(2 citation statements)

References 34 publications

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“…[19][20][21] Tungsten ditelluride (WTe 2 ), an emerging member of the TMDs family, has been reported recently. [21][22][23] In particular, monolayer 2H-phase WTe 2 has been predicted to exist stably in theory [24] and has been successfully synthesized in experiments, [25] so 2H-phase WTe 2 is a stable configuration. In addition, it is a promising catalyst because of its earth-abundant and environmentally friendly features at a low price.…”

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confidence: 99%

Boosting Electrocatalytic Reduction of CO₂ to HCOOH on Ni Single Atom Anchored WTe₂ Monolayer

Zhang

Yang

et al. 2022

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Achieving efficient conversion of carbon dioxide (CO2) to formic acid (HCOOH) at mild conditions is a promising means to reduce greenhouse gas emission and mitigate the energy crisis. Herein, spin‐polarized density functional theory calculations with van der Waals corrections (DFT+D3) are performed to analyze the catalytic activity of seven metals (Ti, Fe, Ni, Cu, Zn, In, and Sn) anchored on a tungsten ditelluride monolayer (M@WTe2) and screen favorable CO2 reduction pathways. These results demonstrate that Ni single atoms strongly bind to the WTe2 monolayer and exist in isolated form due to the high diffusion barriers. Also, Ni‐anchored WTe2 monolayer (Ni@WTe2) possesses a considerably low limiting‐potential (−0.11 V vs reversible hydrogen electrode) to convert CO2 to HCOOH due to moderate OCHO adsorption energy and a suppressed competing hydrogen evolution reaction (HER). Therefore, Ni@WTe2 monolayer is a promising electrocatalytic material for the CO2 reduction reaction (CO2RR). This study sheds light on strategies of designing single metal atom anchored WTe2 catalysts for improved CO2RR performances.

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Boosting Electrocatalytic Reduction of CO₂ to HCOOH on Ni Single Atom Anchored WTe₂ Monolayer

Zhang

Yang

et al. 2022

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“…Furthermore, the surface analysis of the synthesized WTe 2 films was investigated under the XPS to observe the chemical surface states, as illustrated in Figure 2b. The initial four characteristic peaks [25,26] belong to the tungsten metal W (4f), while the rest of the characteristic peaks belong to the Te (3d), as shown in Figure 2c,d. The XPS spectra for the SnO 2 are presented in Figure 2e,f.…”

Section: Experimental Details Device Fabrication and Characterizationsmentioning

confidence: 98%

Flexible Memory Device Composed of Metal-Oxide and Two-Dimensional Material (SnO2/WTe2) Exhibiting Stable Resistive Switching

et al. 2021

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Two-terminal, non-volatile memory devices are the fundamental building blocks of memory-storage devices to store the required information, but their lack of flexibility limits their potential for biological applications. After the discovery of two-dimensional (2D) materials, flexible memory devices are easy to build, because of their flexible nature. Here, we report on our flexible resistive-switching devices, composed of a bilayer tin-oxide/tungsten-ditelluride (SnO2/WTe2) heterostructure sandwiched between Ag (top) and Au (bottom) metal electrodes over a flexible PET substrate. The Ag/SnO2/WTe2/Au flexible devices exhibited highly stable resistive switching along with an excellent retention time. Triggering the device from a high-resistance state (HRS) to a low-resistance state (LRS) is attributed to Ag filament formation because of its diffusion. The conductive filament begins its development from the anode to the cathode, contrary to the formal electrochemical metallization theory. The bilayer structure of SnO2/WTe2 improved the endurance of the devices and reduced the switching voltage by up to 0.2 V compared to the single SnO2 stacked devices. These flexible and low-power-consumption features may lead to the construction of a wearable memory device for data-storage purposes.

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Fast and label-free detection of procalcitonin in human serum for sepsis using a WTex-based extended-gate field-effect transistor biosensor

Pan,

Hsiung,

Chen

et al. 2025

Biosensors and Bioelectronics

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Observation of band bending in WTe2 after surface oxidation

Cited by 7 publications

References 34 publications

Boosting Electrocatalytic Reduction of CO₂ to HCOOH on Ni Single Atom Anchored WTe₂ Monolayer

Boosting Electrocatalytic Reduction of CO₂ to HCOOH on Ni Single Atom Anchored WTe₂ Monolayer

Flexible Memory Device Composed of Metal-Oxide and Two-Dimensional Material (SnO2/WTe2) Exhibiting Stable Resistive Switching

Fast and label-free detection of procalcitonin in human serum for sepsis using a WTex-based extended-gate field-effect transistor biosensor

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Observation of band bending in WTe2 after surface oxidation

Cited by 7 publications

References 34 publications

Boosting Electrocatalytic Reduction of CO2 to HCOOH on Ni Single Atom Anchored WTe2 Monolayer

Boosting Electrocatalytic Reduction of CO2 to HCOOH on Ni Single Atom Anchored WTe2 Monolayer

Flexible Memory Device Composed of Metal-Oxide and Two-Dimensional Material (SnO2/WTe2) Exhibiting Stable Resistive Switching

Fast and label-free detection of procalcitonin in human serum for sepsis using a WTex-based extended-gate field-effect transistor biosensor

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Boosting Electrocatalytic Reduction of CO₂ to HCOOH on Ni Single Atom Anchored WTe₂ Monolayer

Boosting Electrocatalytic Reduction of CO₂ to HCOOH on Ni Single Atom Anchored WTe₂ Monolayer