Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.
J Am Chem Soc. 2013 May 15;135(19):7130-3. doi: 10.1021/ja403041g. Epub 2013 May 2.
To further enhance the catalytic activity and durability of nanocatalysts for the oxygen reduction reaction (ORR), we synthesized a new class of 20 nm × 2 nm ternary alloy FePtM (M = Cu, Ni) nanorods (NRs) with controlled compositions. Supported on carbon support and treated with acetic acid as well as electrochemical etching, these FePtM NRs were converted into core/shell FePtM/Pt NRs. These core/shell NRs, especially FePtCu/Pt NRs, exhibited much improved ORR activity and durability. The Fe10Pt75Cu15 NRs showed a mass current densities of 1.034 A/mgPt at 512 mV vs Ag/AgCl and 0.222 A/mgPt at 557 mV vs Ag/AgCl, which are much higher than those for a commercial Pt catalyst (0.138 and 0.035 A/mgPt, respectively). Our controlled synthesis provides a general approach to core/shell NRs with enhanced catalysis for the ORR or other chemical reactions.
为了进一步提高纳米催化剂在氧还原反应（ORR）中的催化活性和耐久性，我们合成了一类新型的 20nm×2nm 三元合金 FePtM（M=Cu、Ni）纳米棒（NRs），并对其组成进行了控制。在碳载体上进行负载，并经过醋酸处理和电化学蚀刻，这些 FePtM NRs 被转化为核/壳 FePtM/Pt NRs。这些核/壳 NRs，特别是 FePtCu/Pt NRs，表现出了显著提高的 ORR 活性和耐久性。Fe10Pt75Cu15 NRs 在 512mV 相对于 Ag/AgCl 和 557mV 相对于 Ag/AgCl 的条件下，质量电流密度分别达到了 1.034A/mgPt 和 0.222A/mgPt，远高于商业 Pt 催化剂（分别为 0.138A/mgPt 和 0.035A/mgPt）。我们的可控合成提供了一种通用的方法来制备核/壳 NRs，以增强 ORR 或其他化学反应的催化性能。
