Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
Department of Chemistry, Taizhou University, Jiaojiang 318000, China.
J Colloid Interface Sci. 2018 Sep 1;525:260-268. doi: 10.1016/j.jcis.2018.04.051. Epub 2018 Apr 13.
Pt-based bimetallic nanostructures with low content of Pt were considered as one of the attractive nanocatalysts for their high Pt utilization efficiency, remarkable catalytic characters and cost-effectiveness in facilitating the sluggish cathodic reactions in fuel cells. Herein, three-dimensional PtNi nanopolyhedrons (NPHs) with abundant active sites were constructed by a facile one-pot solvothermal strategy, in which cytosine and cetyltrimethylammonium chloride (CTAC) worked as the co-structure directing agents. The PtNi NPHs were mainly characterized by a series of techniques, showing the high catalytic activity and stability towards oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) in comparison to PtNi nanocrystals (NCs), PtNi NCs, commercial Pt black and/or Pt/C catalysts. Impressively, the mass activity of PtNi NPHs was about 215.80 mA mg for ORR, approximately 4-time increase relative to Pt black (49.60 mA mg). These results demonstrate the promising applications of the synthesized nanocatalysts in energy storage and transformation.
具有低铂含量的基于 Pt 的双金属纳米结构因其高 Pt 利用率、显著的催化性能和在促进燃料电池中缓慢阴极反应方面的成本效益而被认为是一种有吸引力的纳米催化剂。在此，通过简便的一锅溶剂热策略构建了具有丰富活性位点的三维 PtNi 纳米多面体（NPH），其中胞嘧啶和十六烷基三甲基氯化铵（CTAC）用作共结构导向剂。PtNi NPH 主要通过一系列技术进行了表征，与 PtNi 纳米晶体（NC）、PtNi NC、商业 Pt 黑和/或 Pt/C 催化剂相比，其对氧还原反应（ORR）和析氢反应（HER）表现出高的催化活性和稳定性。令人印象深刻的是，PtNi NPH 的质量活性为 ORR 的 215.80 mA mg，相对于 Pt 黑（49.60 mA mg）增加了约 4 倍。这些结果表明合成的纳米催化剂在储能和转化方面具有广阔的应用前景。
