کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7721142 | 1497514 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Co-adsorption of hydrogen and CO on Pt film: An in-situ ATR-IR study combined with DFT calculations
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Co-adsorption of hydrogen and CO on Pt film: An in-situ ATR-IR study combined with DFT calculations Co-adsorption of hydrogen and CO on Pt film: An in-situ ATR-IR study combined with DFT calculations](/preview/png/7721142.png)
چکیده انگلیسی
The co-adsorption of hydrogen and CO on Pt film was studied by in-situ attenuated total reflection Infrared (ATR-IR) Spectroscopy. It was found that the adsorption of CO on Pt is much stronger than that of hydrogen, and the co-adsorbed hydrogen species lead to dramatic red shifts of both linear and bridged-adsorbed CO peaks. The more hydrogen species adsorbed on Pt surface, the more red shifts of CO frequencies were observed. Based on the results obtained from the well-designed experiments, it is deduced that H may act as an electron donor on Pt surface and negative charge is transferred from H to Pt. Thus, the surface charge properties of Pt film were changed, which enhances the d-Ïâ backdonation effect between Pt and CO and consequently leads to dramatic red shifts of CO peaks. The density functional theory (DFT) calculations based on simple models confirmed the charge transfer effect between hydrogen and Pt. This study also shows that ATR-IR technique is a powerful tool to investigate the gas-solid interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 31, 17 October 2013, Pages 13673-13679
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 31, 17 October 2013, Pages 13673-13679
نویسندگان
Xingxing Feng, Manli Yao, Xin Hu, Gengshen Hu, Aiping Jia, Guanqun Xie, Jiqing Lu, Mengfei Luo,