کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1613425 1005597 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrogen sorption by porous materials composed of one to three elements selected from boron, carbon and nitrogen and metal modification to enhance the sorption
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Hydrogen sorption by porous materials composed of one to three elements selected from boron, carbon and nitrogen and metal modification to enhance the sorption
چکیده انگلیسی
In order to develop novel hydrogen storage materials with high hydrogen capacity, layered compounds with high specific surface areas and large pore volumes, referred to as BN's, CN's and C's, were synthesized from B-, C- and/or N-containing substances through specified wet processing and optimized calcinations. Hydrogen contents at 77 K under 0.8 MPa of hydrogen increased as specific surface areas increased independently of the formulations of the samples, and almost all of them exceeded the predicted values for two dimensional condensation of hydrogen, that is, 2.34 mass% per 1000 m2 g−1. While modification with Pd did not increase the hydrogen capacity, Pt-modification brought about substantially higher hydrogen capacity at 77 K. Ni-modification also imparted higher hydrogen capacity to C's prepared by calcination of electrospun polyacrylonitrile fibers, but formation of mesopores on destroying micropores through excessive modification would reduce the hydrogen capacity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 580, Supplement 1, 15 December 2013, Pages S305-S308
نویسندگان
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