Nanoporous gyroid platinum with high catalytic activity from block copolymer templates via electroless plating
Nanoporous gyroid platinum with high catalytic activity from block copolymer templates via electroless plating
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DOI：
10.1038/am.2015.13
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发表时间：
2015-04-01
影响因子：
9.7
通讯作者：
Ho, Rong-Ming
中科院分区：
文献类型：
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作者：
Cheng, Chung-Fu;Hsueh, Han-Yu;Ho, Rong-Ming
以具有回旋状纳米通道的纳米多孔聚合物为模板，制备了具有回旋状纳米结构的纳米多孔铂(Pt)。通过可降解嵌段共聚物聚苯乙烯-b-聚L-丙交酯(PS-PLLA)的自组装，然后对PLLA嵌段进行水解，得到了纳米孔聚合物模板。模板化化学镀可以在环境条件下进行，以在PS基质中创建具有高结晶度的精确控制的铂回旋纳米结构。去除PS基质后，可以成功地制备出互连良好的纳米多孔陀螺体铂。与商用催化剂相比，纳米多孔铂具有优异的宏观稳定性和峰比活性，这得益于良好的网络结构和健壮的织构以及铂低指数晶面的生长。
Nanoporous platinum (Pt) with a gyroid nanostructure was fabricated using a nanoporous polymer with gyroid nanochannels as a template. The nanoporous polymer template was obtained from the self-assembly of the degradable block copolymer, polystyrene-b-poly(L-lactide) (PS-PLLA), followed by the hydrolysis of the PLLA blocks. Templated electroless plating can be conducted under ambient conditions to create a precisely controlled Pt gyroid nanostructure with high crystallinity in a PS matrix. After removal of the PS matrix, the well-interconnected nanoporous gyroid Pt can be successfully fabricated. Compared with commercially available catalysts, the nanoporous Pt possesses superior macroscopic stability and peak specific activity, benefiting from the well-defined network structure with robust texture and the growth of the low-index crystalline facets of Pt.