Hierarchical Metal-Free Nitrogen-Doped Porous Graphene/Carbon Composites as an Efficient Oxygen Reduction Reaction Catalyst
Hierarchical Metal-Free Nitrogen-Doped Porous Graphene/Carbon Composites as an Efficient Oxygen Reduction Reaction Catalyst
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多级无金属氮掺杂多孔石墨烯/碳复合材料作为高效氧还原反应催化剂
DOI：
10.1021/acsami.5b10642
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发表时间：
2016-01-20
影响因子：
9.5
通讯作者：
Pan, Junqing
中科院分区：
文献类型：
--
作者：
Men, Bao;Sun, Yanzhi;Pan, Junqing
采用一种简单的非模板法制备了多级氮掺杂多孔石墨烯/碳（NPGC）复合材料。形貌表征表明，还原氧化石墨烯被葡萄糖碳成功包覆，在950 ℃热解后形成了有序、互穿的NPGC分级多孔结构。值得注意的是，所制备的材料（表示为NPGC-950）具有超大的比表面积（1510.83 m（2）g（-1））和相对高的吡啶氮和石墨氮含量百分比。NPGC-950作为一种高效的无金属电催化剂，在碱性溶液中具有较高的起始电位（0.91 V vs RHE）和接近四电子的氧还原反应路径，并且具有比商品Pt/C更强的甲醇耐受性和更好的长期稳定性。因此，所制备的多级结构N掺杂无金属多孔碳材料是一种很有前途的氧还原催化剂，具有广泛的工业应用前景。
Hierarchical nitrogen-doped porous graphene/carbon (NPGC) composites were fabricated by a simple and nontemplate method. The morphology characterizations demonstrate that reduced graphene oxide was successfully coated by the carbon derived from glucose, and a well-organized and interpenetrated hierarchical porous structure of NPGC was formed after pyrolysis at 950 degrees C. Notably, the prepared material, denoted as NPGC-950, has superlarge specific surface area (1510.83 m(2) g(-1)) and relatively high content percentage of pyridinic and graphitic nitrogen. As an efficient metal-free electrocatalyst, NPGC-950 exhibits a high onset potential (0.91 V vs RHE) and a nearly four-electron pathway for oxygen reduction reaction in alkaline solution as well as stronger methanol tolerance and better long-term durability than commercial Pt/C. In view of these excellent features, the obtained hierarchical N-doped metal-free porous carbon material is a promising catalyst for oxygen reduction reaction and could be widely applied in industry.