Facile Synthesis of Nanoporous Pt-Y alloy with Enhanced Electrocatalytic Activity and Durability.
Facile Synthesis of Nanoporous Pt-Y alloy with Enhanced Electrocatalytic Activity and Durability.
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轻松合成具有增强电催化活性和耐久性的纳米多孔 Pt-Y 合金
DOI：
10.1038/srep41826
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发表时间：
2017-02-02
影响因子：
4.6
通讯作者：
Han Z
中科院分区：
文献类型：
--
作者：
Cui R;Mei L;Han G;Chen J;Zhang G;Quan Y;Gu N;Zhang L;Fang Y;Qian B;Jiang X;Han Z
近年来，Pt-Y合金在氧还原反应（ORR）中表现出优异的电催化活性，被认为是一种很有前途的燃料电池阴极催化剂。然而，大规模生产具有优异催化性能的纳米级Pt-Y合金仍然是一个巨大的挑战。在这里，我们通过一种简单的脱合金方法来合成纳米多孔Pt-Y合金（NP-PtY），其典型韧带尺寸为~5 nm。将Pt- y合金固有的优越电催化活性与特殊的纳米多孔结构相结合，使NP-PtY双金属催化剂在ORR和乙醇氧化反应中表现出更高的活性，并且比商用Pt/C催化剂和纳米多孔Pt合金具有更好的电催化稳定性。所制备的NP-PtY具有制备简单、催化性能优异等优点，在质子交换膜燃料电池中具有广阔的应用前景。
Recently, Pt-Y alloy has displayed an excellent electrocatalytic activity for oxygen reduction reaction (ORR), and is regarded as a promising cathode catalyst for fuel cells. However, the bulk production of nanoscaled Pt-Y alloy with outstanding catalytic performance remains a great challenge. Here, we address the challenge through a simple dealloying method to synthesize nanoporous Pt-Y alloy (NP-PtY) with a typical ligament size of ~5 nm. By combining the intrinsic superior electrocatalytic activity of Pt-Y alloy with the special nanoporous structure, the NP-PtY bimetallic catalyst presents higher activity for ORR and ethanol oxidation reaction, and better electrocatalytic stability than the commercial Pt/C catalyst and nanoporous Pt alloy. The as-made NP-PtY holds great application potential as a promising electrocatalyst in proton exchange membrane fuel cells due to the advantages of facile preparation and excellent catalytic performance.