Ultrathin and Ultralong Single-Crystal Platinum Nanowire Assemblies with Highly Stable Electrocatalytic Activity
Ultrathin and Ultralong Single-Crystal Platinum Nanowire Assemblies with Highly Stable Electrocatalytic Activity
复制标题
DOI：
10.1021/ja402955t
复制
发表时间：
2013-06-26
影响因子：
15
通讯作者：
Wang, Xin
中科院分区：
文献类型：
--
作者：
Xia, Bao Yu;Wu, Hao Bin;Wang, Xin
超薄一维纳米结构如纳米线和纳米棒由于其在各个领域的应用前景而引起了人们的广泛关注。尽管贵金属一维纳米结构的报道很多，但一锅法合成Pt一维纳米结构仍然是一个很大的挑战，这可能是因为Pt的晶体生长行为具有内在的各向同性。在这里，我们证明了由纳米线（约100微米）组成的纳米线组装体的简易溶剂热合成。3 nm）和超长（可达10 μ m）Pt纳米线。定向附着机制被发现是部分负责形成这样的铂纳米线。在反应过程中产生的胺分子可能有助于纳米线组装体的形成。重要的是，本系统可以扩展到合成Pt基合金纳米线组件，如Pt-Au和Pt-Pd。这些Pt纳米线可以很容易地浇铸成一个独立的膜，表现出优异的电催化活性和非常高的稳定性，甲酸和甲醇的氧化和氧还原反应。
Ultrathin one-dimensional (1D) nanostructures such as nanowires and nanorods have drawn considerable attention due to their promising applications in various fields. Despite the numerous reports on 1D nanostructures of noble metals, one pot solution synthesis of Pt 1D nanostructures still remains a great challenge, probably because of the intrinsic isotropic crystal growth behavior of pt. Herein, we demonstrate the facile solvothermal synthesis of nanowire assemblies composed of ultrathin (ca. 3 nm) and ultralong (up to 10 mu m) Pt nanowires without involving any template. The oriented attachment mechanism is found to be partially responsible for the formation of such ultrathin Pt nanowires. The amine molecules generated during the reaction might assist the formation of nanowire assemblies. Importantly, the present system can be extended to synthesize Pt-based alloy nanowire assemblies such as Pt-Au and Pt-Pd. These Pt nanowires can be easily cast into a free-standing membrane, which exhibits excellent electrocatalytic activity and very high stability for formic acid and methanol oxidation and the oxygen reduction reaction.