کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8954935 | 1646054 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and characterization of nanostructured CoMoB thin film catalysts for the hydrolysis of ammonia borane
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Preparation and characterization of nanostructured CoMoB thin film catalysts for the hydrolysis of ammonia borane Preparation and characterization of nanostructured CoMoB thin film catalysts for the hydrolysis of ammonia borane](/preview/png/8954935.png)
چکیده انگلیسی
Nanostructured CoMoB thin film catalysts were prepared via electroless plating method on the foam sponge. The effect of depositional pH value on the hydrogen generation rate from the hydrolysis of ammonia borane was investigated. The results show that the hydrogen generation rate increases from 3890.9 to 5100.0Â mLÂ minâ1 gcatâ1, when the pH value increases from 10.5 to 11.0. However, the hydrogen generation rate reduces to 3945.5 and 3242.3Â mLÂ minâ1 gcatâ1, when the pH value further increases to 11.5 and 12.0, respectively. Hence, it can be seen that the as-prepared CoMoB thin film catalyst (pHÂ =Â 11.0) exhibits the highest hydrogen generation rate, which could be attributed to the smaller size and the synergistic effect of Co, Mo and B on the catalyst surface. Moreover, the activation energy of the catalytic hydrolysis reaction at 298Â K was 41.7Â kJÂ molâ1. The value is lower than that of the most of Ni-based and Co-based catalysts, even some noble metal catalysts. After 5 cycles, the catalytic activity of the CoMoB thin film catalyst remains about 61.9% of its initial value. Based on the SEM analysis, the reduction of the catalytic activity could be ascribed to the agglomeration of the active substance and some impurity phase on the catalyst surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 37, 13 September 2018, Pages 17664-17672
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 37, 13 September 2018, Pages 17664-17672
نویسندگان
Chao Li, Wei Meng, Guijuan Hu, Yan Wang, Zhongqiu Cao, Ke Zhang,