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A Comparison of Pt/Si and Pt3Cu/Si Schottky nano-heterojunctions: enhanced direct methanol energy converter based on non-adiabatic system and molecular adsorption

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Abstract

In order to utilize the miniaturization exothermic oxidation of methanol in the microelectronic device as an energy source rather than industrial waste, nano-heterojunctions between Si and 20 nm ultra-thin catalyst Pt3Cu or Pt film were fabricated to investigate the energy conversion of methanol in this study. Methanol was catalyzed by Pt3Cu or Pt to release energy, then electrons were excited and passed through the Schottky barrier of Pt3Cu/Si or Pt/Si, which were calculated to be 0.43 and 0.80 eV, respectively. Thereupon, hot electron current was formed in a ballistic transport mode. Pt3Cu, Pt and Si have good high temperature stability. Pt3Cu has a higher crystallinity and better electronic structure than Pt and is dominated by (111) crystal orientation. Thus, Pt3Cu has higher catalytic activity and stronger ability to overcome the toxicity of CO, making it easier to obtain stable hot electron current. The factors that affect the hot electron current are varied from chemical reaction rate to Au electrode structure with the increase of temperature. This work is likely to provide a new reference to enhance the methanol’s direct conversion effectively with a stable current in the solid-state way at different temperature. Herein we report for the first time achieving methanol as hot electron energy source. Therefore, the maximum utilization of energy could be realized by turning waste methanol into treasure.

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Acknowledgements

This research was supported by National Natural Science Foundation of China (Grant No: 5177060654), Yunnan Hu Zhiyu Expert Workstation ([2014]5). We also would like to thank the Center of Advanced Electronic Materials and Devices and Instrumental Analysis Center of Shanghai Jiao Tong University for providing experimental support.

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Authors and Affiliations

  1. National Key Laboratory of Science and Technology on Micro/Nano Fabrication, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Xiang Chen, Zhenhua Wu, Erzhen Mu, Zhimao Wu & Zhiyu Hu

  2. Institute of Nano/Micro Energy, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Xiang Chen, Zhenhua Wu, Erzhen Mu, Zhimao Wu & Zhiyu Hu

  3. Department of Micro-Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Minhang District, Shanghai, 200240, China

    Xiang Chen, Zhenhua Wu, Erzhen Mu, Zhimao Wu & Zhiyu Hu

  4. Center for Advanced Electronic Materials and Devices, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Xuecheng Fu

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  1. Xiang Chen
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  2. Zhenhua Wu
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  3. Xuecheng Fu
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Correspondence to Zhiyu Hu.

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Chen, X., Wu, Z., Fu, X. et al. A Comparison of Pt/Si and Pt3Cu/Si Schottky nano-heterojunctions: enhanced direct methanol energy converter based on non-adiabatic system and molecular adsorption. J Mater Sci: Mater Electron 29, 16486–16495 (2018). https://doi.org/10.1007/s10854-018-9742-4

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  • DOI: https://doi.org/10.1007/s10854-018-9742-4

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