کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5431741 1508823 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly enhanced stability and efficiency for atmospheric ammonia photocatalysis by hot electrons from a graphene composite catalyst with Al2O3
ترجمه فارسی عنوان
پایداری و کارایی بالا برای فوتوکاتالیز آمونیاک اتمسفری توسط الکترونهای داغ از یک کاتالیزور کامپوزیت گرافن با آلومینیوم
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی

Stable and cost-effective catalysts for efficient ammonia synthesis under mild conditions particularly at ambient pressure and temperature have been pursued widely and intensively. Recently we have reported a method using a composite catalyst with nano iron oxide hosted in a three-dimensional cross-linked graphene template material, Fe@3DGraphene. With this catalyst, a light driven and efficient ammonia synthesis from N2 and H2 directly at ambient pressure was achieved, where graphene works as an electron reservoir under light illumination. But, the catalytic activity dropped over time due to the aggregation of the Fe2O3 particles. Here we report the new version of this catalyst, a nano Al2O3 modified Fe@3DGraphene catalyst (FeAl@3DGraphene) through a simple solvothermal method, where nano Al2O3 serves as a barrier among nano Fe2O3 to efficiently prevent the aggregation of the Fe2O3 particles. The optimized ammonia synthesis rate of 430 μg gcat−1 h−1 was achieved and kept steady for a 60-h test which was enhanced to more than twice of the previous catalyst without Al2O3 structural promoter.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 124, November 2017, Pages 72-78
نویسندگان
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