Low content Pt nanoparticles anchored on N-doped reduced graphene oxide with high and stable electrocatalytic activity for oxygen reduction reaction.
Low content Pt nanoparticles anchored on N-doped reduced graphene oxide with high and stable electrocatalytic activity for oxygen reduction reaction.
复制标题
低含量 Pt 纳米颗粒锚定在氮掺杂还原氧化石墨烯上，具有高且稳定的氧还原反应电催化活性
DOI：
10.1038/srep43352
复制
发表时间：
2017-02-24
影响因子：
4.6
通讯作者：
Liu Z
中科院分区：
文献类型：
--
作者：
Li Z;Gao Q;Zhang H;Tian W;Tan Y;Qian W;Liu Z
一种新型低含量Pt/N-rGO杂化物。将% Pt均匀地固定在氮掺杂的还原氧化石墨烯（N-rGO）表面。Pt具有直径均匀的2.8 nm和暴露的（111）晶面；同时，N在Pt/N-rGO中通过Pt-N和N- c化学键充当Pt和rGO之间的桥梁。由于n掺杂碳基体和Pt纳米粒子的协同催化作用，Pt/N-rGO材料在氧还原反应中具有很高的电催化活性，其质量催化活性是商品Pt/C的1.5倍以上。此外，Pt/N-rGO中稳定的Pt- n - c化学键可以防止Pt纳米粒子在基体上的脱离、溶解、迁移和聚集，在5000次循环加速耐久性测试中，Pt/N-rGO表现出优异的稳定性，几乎没有损失（仅0.4%）。
A novel kind of Pt/N-rGO hybrid possessing of low content 5.31 wt.% Pt anchored on the surface of nitrogen doped reduced graphene oxide (N-rGO) evenly was prepared. The Pt has uniformed 2.8 nm diameter and exposed (111) crystal planes; meanwhile, the N works as the bridge between Pt and rGO with the Pt-N and N-C chemical bonds in Pt/N-rGO. The Pt/N-rGO material has a very high electrocatalytic activity in oxygen reduction reaction with the mass catalytic activity more than 1.5 times of the commercial Pt/C due to the synergistic catalytic effect of both N-doped carbon matrix and Pt nanoparticles. Moreover, the Pt/N-rGO exhibits an excellent stability with hardly loss (only 0.4%) after accelerated durability tests of 5000 cycles based on the stable Pt-N-C chemical bonds in Pt/N-rGO, which can prevent the detachment, dissolution, migration and aggregation of Pt nanoparticles on the matrix during the long-term cycling.