Cost-effective preparation of metal-free electrocatalysts by phosphoric acid activation of lignocellulosic materials for oxygen reduction reaction
Cost-effective preparation of metal-free electrocatalysts by phosphoric acid activation of lignocellulosic materials for oxygen reduction reaction
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通过磷酸活化木质纤维素材料用于氧还原反应经济高效地制备无金属电催化剂
DOI：
10.1016/j.ijhydene.2018.12.035
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发表时间：
2019-01
影响因子：
7.2
通讯作者：
Yongcan Jin
中科院分区：
文献类型：
--
作者：
Yongfang Wang;Songlin Zuo;Meng Miao;Ya Liu;Zhengrong Gu;Yongcan Jin
通过磷酸活化木质纤维素前体（一种工业方法），随后在氨中热处理来制备活性炭。因此，开发了一种具有成本效益、可扩展且不含金属的电催化剂，用于燃料电池阴极处的氧还原反应（ORR）。采用元素分析、X射线光电子能谱、X射线衍射和氮吸附等方法对活性炭的理化性质进行了分析。采用循环伏安法和线性扫描伏安法研究了活性炭在碱性电解液中的ORR电催化性能。结果表明，含磷基团是赋予磷酸活性炭与商业Pt/C相当的电催化活性的关键。这是因为这些含磷基团促进了含氮基团和微观结构中缺陷的形成。此外，在氨水中热处理的磷酸活性炭产生了高度发达的中孔结构，从而在动力学上促进了ORR。
Activated carbons have been prepared by phosphoric acid activation of lignocellulosic precursors, an industrial method, followed by heat treatment in ammonia. Thus, a cost-effective, scalable and metal-free electrocatalyst was developed for use in oxygen reduction reaction (ORR) at fuel cell cathodes. The physicochemical properties of the activated carbons have been analyzed by elemental analysis, X-ray photoelectron spectroscopy, X-ray diffraction, and nitrogen adsorption. The ORR electrocatalytic performances of the activated carbons have been investigated by cyclic voltammetry and linear sweep voltammetry in an alkaline electrolyte. The results showed that phosphorus-containing groups are key to endowing phosphoric-acid-activated carbons with comparable electrocatalytic activity to that of commercial Pt/C. This was because these phosphorus-containing groups facilitated the formation of both nitrogen-containing groups and defects in the microstructure. Besides, heat treatment of phosphoric-acid-activated carbons in ammonia produced a highly developed mesopore structure and thus kinetically facilitated the ORR.
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高比表面积活性炭的氨改性作为氧还原反应的无金属电催化剂
影响因子：
6.6
作者：
Yongfang Wang;Songlin Zuo;Ya Liu
通讯作者：
Ya Liu
影响因子：
10.9
作者：
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影响因子：
3.9
作者：
Wang, Yongfang;Zuo, Songlin;Yoon, Seong-Ho
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Yoon, Seong-Ho
DOI：
10.1021/la0472495
发表时间：
2005-04
期刊：
Langmuir : the ACS journal of surfaces and colloids
影响因子：
--
作者：
B. Xiao;J. Boudou;Mark Thomas
通讯作者：
B. Xiao;J. Boudou;Mark Thomas
影响因子：
10.9
作者：
Neimark, Alexander V.;Lin, Yangzheng;Thommes, Matthias
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Thommes, Matthias