Noncovalently functionalized graphitic mesoporous carbon as a stable support of Pt nanoparticles for oxygen reduction
Noncovalently functionalized graphitic mesoporous carbon as a stable support of Pt nanoparticles for oxygen reduction
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DOI：
10.1016/j.jpowsour.2009.10.036
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发表时间：
2010-04
影响因子：
9.2
通讯作者：
Yuyan Shao;S. Zhang;R. Kou;Xiqing Wang;Chong-Min Wang;S. Dai;V. Viswanathan;Jun Liu;Yong Wang;Yuehe Lin
中科院分区：
文献类型：
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作者：
Yuyan Shao;S. Zhang;R. Kou;Xiqing Wang;Chong-Min Wang;S. Dai;V. Viswanathan;Jun Liu;Yong Wang;Yuehe Lin
我们报道了石墨烯纳米片（GNP），它具有单层石墨烯和高石墨碳的优点，作为用于燃料电池中氧还原的 Pt 纳米颗粒的耐用替代支撑材料。 Pt 纳米粒子沉积在聚（二烯丙基二甲基氯化铵）（PDDA）涂层的 GNP 上，并通过透射电子显微镜、X 射线衍射、拉曼光谱和电化学测试进行表征。 Pt/GNP 表现出极大增强的电化学耐久性（是 Pt/CNT 和商业 Etek Pt/C 的 2-3 倍）。这些归因于 GNP 固有的高石墨化程度和 Pt/GNP 中增强的 Pt-碳相互作用。如果考虑到 GNP 可以很容易地用石墨大规模生产，那么 GNP 是一种有前途、低成本且耐用的电催化剂，用于燃料电池中的氧还原。
We report graphene nanoplatelets (GNPs), which exhibit the advantages of both single-layer graphene and highly graphitic carbon, as a durable alternative support material for Pt nanoparticles for oxygen reduction in fuel cells. Pt nanoparticles are deposited on poly(diallyldimethylammonium chloride) (PDDA)-coated GNP, and characterized with transmission electron microscopy, X-ray diffraction, Raman spectra, and electrochemical tests. Pt/GNP exhibits greatly enhanced electrochemical durability (2–3 times that of Pt/CNT and commercial Etek Pt/C). These are attributed to the intrinsic high graphitization degree of GNP and the enhanced Pt-carbon interaction in Pt/GNP. If considering that GNP can be easily mass produced from graphite, GNP is a promising, low-cost, and durable electrocatalyst support for oxygen reduction in fuel cells.