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學年
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109 |
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學期
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1 |
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出版（發表）日期
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2021-01-01 |
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作品名稱
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FeN@N-doped Graphitic Biochars Derived from Hydrothermal-microwave Pyrolysis of Cellulose Biomass for Fuel Cell Catalysts |
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作品名稱（其他語言）
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著者
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Hung-Chih Kuo, Yan-Gu Lin, Chao-Lung Chiang, Shou-Heng Liu |
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單位
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出版者
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著錄名稱、卷期、頁數
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Journal of Analytical and Applied Pyrolysis, 153, 104991 |
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摘要
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Iron-nitrogen moieties encapsulated in the N-doped graphitic and hierarchical biochars are derived from the hydrothermal pyrolysis and microwave NH3 activation of cellulose and lignin. The physicochemical properties of these biochars are identified by using various analytical instruments and their application as electrocatalysts in oxygen reduction reaction (ORR) is also evaluated in alkaline solution. As compared to the lignin-derived biochars (named as L-y), the cellulose-derived biochars (named as C-x) have superior activities toward ORR due to the formation of highly graphitic carbon shells (as proofed by using X-ray diffraction and high-resolution transmission electron microscope) in the biochars. Moreover, the C-1% (i.e., 1% of iron in the cellulose-derived biochars) exhibits the best electrocatalytic performance (onset potential = −0.05 V vs. Ag/AgCl) and follows a near four-electron ORR route, which could be ascribed to the more active iron-nitrogen sites (as evidenced by X-ray photoelectron and X-ray absorption spectroscopy) covered with hierarchical carbon shells (as identified by N2 adsorption-desorption isotherms). The cellulose-derived biochars with distinctive iron-nitrogen retained in the shell of N-doped graphitic and hierarchical carbons by employing a time-saving and energy-efficient microwave activation procedure may render a potential application in the ORR. |
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關鍵字
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語言
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en |
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ISSN
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期刊性質
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國外 |
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收錄於
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SCI
SSCI
Scopus
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產學合作
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通訊作者
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Shou-Heng Liu |
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審稿制度
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是 |
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國別
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NLD |
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公開徵稿
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出版型式
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,電子版 |