SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Xinyue Li,Hongjing Fei,Yanlin Zhang,Zheng Zhang,Huakang Zong,Bo Liu,Guotao Duan,Yuanyuan Luo
The detection of low-concentration hydrogen at room temperature is still a challenge, which contributes to taking precautions as soon as possible when hydrogen leaks. In this study, we prepared Pt/SnO 2 -Pd nanomaterial as nanoelectrode applied for a fuel cell-type hydrogen sensor with zero power consumption . The sensing results show that such fuel cell-type H 2 gas sensor has high selectivity and good sensitivity to H 2 gas, with an unprecedented low detection limit of 1 ppm, and the humidity has little impact on the sensor's performance. Based on DFT calculations, the low adsorption energy and the electron transfer interaction between Pd and H promote the adsorption and dissociation processes of H 2 molecules, which lead to the hydrogen oxidation reaction acceleration and shorter times of response and recovery. In addition, this Pt/SnO 2 -Pd based sensor has also advantages of high selectivity and zero-power consumption, which may provide a broad application prospect for fuel cell vehicles and voltage transformers, etc.
研究领域:
材料科学
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纳米技术
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Xingxing Yu,Faxun Wang,Huakang Zong,Yufei Gan,Guotao Duan,Yuanyuan Luo
The modification of ionic liquid electrolytes is of particular importance for the development of high-performance electrochemical oxygen sensors with zero power consumption but still quite challenging. Herein, we designed and synthesized an electrochemical oxygen sensor based on the modified Pt/CMK-3-COOH-[EMIM][OAc] ionic liquid as composite electrolyte, where the -COOH functional group was introduced by acidifying CMK to provide hydrogen protons, and then Pt nanoparticles with different contents were loaded to improve the activity of the sensor towards O 2 gas as well as the conductivity of ionic liquid. Such composite ionic liquid sensor exhibits excellent O 2 detection ability with high sensitivity (0.58 μA/[%O 2 ]), high stability, wide detection range (0.4-10%), and zero-power consumption, along with the detection limit as low as 0.4%. Furthermore, it has humidity-independent gas-sensing characteristic. Moreover, density functional theory (DFT) calculations combined with experimental results were applied to deeply unveil the improved O 2 sensing mechanism. Compared with CMK, the introduction of Pt/CMK-3-COOH material increases the conductivity of the ionic liquid, decreases the adsorption energy of the sensor for O 2 and hydrogen protons, promotes the oxygen reduction reaction, and simulates the transfer of effective charge, thereby significantly improving O 2 sensing. This work provides a high-performance ionic liquid oxygen sensor, showing potential application in zero-power consumption and low concentration O 2 detection.
研究领域:
电化学传感
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生物医学工程
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分子诊断
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即时检测
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生物传感器
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转化医学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
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2025
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IF 26.8
Xiao-Liang Ge,Su Xu,Tian-Tai Zhang,Zhuo-Tong Li,Jia-Qi Feng,Hang Ren,Dong-Dong Han,Yong-Lai Zhang
Effective thermal management is essential for ensuring the reliability of electronic devices. However, conventional thermal management technologies often require significant space or consume substantial power, which limits system integration and alters the electromagnetic performance, including operating bandwidth and efficiency. Here, a zero-power-consumption, self-adaptive mechanical metasurface is introduced that provides dual-mode thermal management. Composed of liquid crystal elastomer and copper, the periodically arranged units harness a thermally driven strain mismatch between these materials to achieve temperature-dependent structural reconfiguration. This mechano-thermal transduction mechanism passively converts excess heat into mechanical energy, thereby providing efficient thermal management for multiple electronic devices in this experimental demonstration. As a proof of concept, by designing the deep-subwavelength unit cells of metasurface without perturbing the surface current distribution of a Vivaldi antenna, it is shown that the mechanical reconfiguration can be decoupled from electromagnetic functionality, thereby enabling the integration of adaptive thermal management with stable electromagnetic performance. This framework effectively combines multi-physics functionality, encompassing thermal, mechanical, and electromagnetic domains. This work not only reveals a previously unexplored application for stimuli-responsive materials but also holds significant promise for various applications, including advanced communication and wearable systems.
研究领域:
热管理
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智能材料
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超材料
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电磁兼容性
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柔性电子
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可穿戴系统
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天线技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）