Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology , San 31, Hyojadong, Namgu, Pohang 790-784, Korea.
ACS Nano. 2013 Oct 22;7(10):9223-31. doi: 10.1021/nn4038404. Epub 2013 Sep 5.
Controlling the morphology and size of platinum nanodendrites (PtDs) is a key factor in improving their catalytic activity and stability. Here, we report the synthesis of PtDs on genomic-double-stranded-DNA/reduced-graphene-oxide (gdsDNA/rGO) by the NaBH4 reduction of H(2)PtCl(6) in the presence of plant gdsDNA. Compared to industrially adopted catalysts (i.e., state-of-the-art Pt/C catalyst, Pt/rGO, Pt(3)Co, etc.), the as-synthesized PtDs/gdsDNA/rGO hybrid displays very high oxygen reduction reaction (ORR) catalytic activities (much higher than the 2015 U.S. Department of Energy (DOE) target values), which are the rate-determining steps in electrochemical energy devices, in terms of onset-potential, half-wave potential, specific-activity, mass-activity, stability, and durability. Moreover, the hybrid exhibits a highly stable mass activity for the ORR over a wide pH range of 1-13. These exceptional properties would make the hybrid applicable in next-generation electrochemical energy devices.
控制铂纳米枝晶（PtD）的形态和尺寸是提高其催化活性和稳定性的关键因素。在这里，我们通过在植物 gdsDNA 的存在下用 NaBH4 还原 H2PtCl6，报告了在基因组双链 DNA/还原氧化石墨烯（gdsDNA/rGO）上合成 PtD。与工业上采用的催化剂（即最先进的 Pt/C 催化剂、Pt/rGO、Pt(3)Co 等）相比，所合成的 PtD/gdsDNA/rGO 杂化物在氧还原反应（ORR）催化活性方面表现出非常高的性能（远高于 2015 年美国能源部（DOE）的目标值），这是电化学能量装置的决速步骤，其指标包括起始电位、半波电位、比活性、质量活性、稳定性和耐久性。此外，该杂化物在 pH 值为 1-13 的宽范围内对 ORR 表现出高度稳定的质量活性。这些优异的性能将使该杂化物适用于下一代电化学能量装置。
