Homogeneously supported PtGa NPs on nitrogen-doped mesoporous carbon as an enhanced ORR electro-catalyst
Homogeneously supported PtGa NPs on nitrogen-doped mesoporous carbon as an enhanced ORR electro-catalyst
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DOI：
10.1016/j.matlet.2020.129266
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发表时间：
2021-01-05
影响因子：
3
通讯作者：
Pan, Xuchao
中科院分区：
文献类型：
--
作者：
Chen, Yaohui;Xu, Pengfu;Pan, Xuchao
铂（Pt）纳米颗粒催化剂具有优异的氧还原反应（ORR）性能，但铂的昂贵价格直接限制了Pt基催化剂的商业化。负载型PtGa合金纳米颗粒（NPs）通过配体、应变和/或系综效应具有改性的表面性质和反应性，被认为是有前途的廉价低Pt候选物。在这篇文章中，我们报道了一种尺寸为3.8 +/- 0.4 nm的PtGa纳米颗粒锚定在氮掺杂的介孔碳（PtGa@NMC）上，用于碱性电解质中的有效ORR电催化剂。PtGa@NMC的半波电势（E-1/2）值（0.92V vs RHE）与在IM KOH溶液中的商业Pt/C相比正向偏移类似于30 mV。加速耐久性试验（ADT）和计时电流法（CA）结果表明，该材料具有优异的长期耐久性。考虑到高性能和优异的稳定性，PtGa@NMC提供了替代当代铂基催化剂的可能性。(C)2020爱思唯尔B. V.保留所有权利。
Platinum (Pt) nanoparticle catalysts show excellent performance for oxygen reduction reaction (ORR), but the high cost of Pt directly limits the commercialization of Pt-based catalysts. Supported PtGa alloy nanoparticles (NPs) with modified surface property and reactivity through ligand, strain and/or ensemble effects are considered as promising inexpensive low-Pt candidates. In this article, we report a PtGa nanoparticles with a size of 3.8 +/- 0.4 nm anchored on nitrogen-doped mesoporous carbon (PtGa@NMC) for an efficient ORR electrocatalyst in alkaline electrolytes. The half-wave potential (E-1/2) values of PtGa@NMC (0.92 V vs RHE) positively shift similar to 30 mV compared to commercial Pt/C in 1 M KOH solution. And it has outstanding long-term durability by the result of accelerated durability tests (ADTs) and chronoamperometry (CA). Considering high performance and excellent stability, PtGa@NMC presents the possibility of replacing contemporary Pt-based catalysts. (C) 2020 Elsevier B.V. All rights reserved.