Facile Synthesis of PtCu Alloy/Graphene Oxide Hybrids as Improved Electrocatalysts for Alkaline Fuel Cells,ACS Omega

当前位置： X-MOL 学术 › ACS Omega › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Facile Synthesis of PtCu Alloy/Graphene Oxide Hybrids as Improved Electrocatalysts for Alkaline Fuel Cells
ACS Omega ( IF 3.7 ) Pub Date : 2018-08-07 00:00:00 , DOI: 10.1021/acsomega.8b01347
Taiyang Liu ₁ , Chaozhong Li _{1,

2} , Qiang Yuan _{1,

2}

Affiliation

Morphology-controllable preparation of Pt-based nanoalloys supporting on carbonaceous materials is a potential strategy to enhance the catalytic properties for oxygen reduction reaction (ORR) and ethanol oxidation reaction (EOR); they are recognized as irreplaceable electrode reactions in proton-exchange membrane ethanol fuel cells. Herein, we exhibit a facile, one-step synthesis method to directly prepare composition-tunable PtCu alloy/graphene oxide (GO) hybrids. The structure of the as-synthesized PtCu alloy/GO hybrids has been analyzed using transmission electron microscopy, high resolution transmission electron microscopy, energy-dispersive X-ray, X-ray diffraction, inductively coupled plasma, and X-ray photoelectron spectroscopy. In the PtCu alloy/GO hybrids, the PtCu alloy nanoparticles well disperse on GO, and the size is below 5.0 nm. The catalysis for ORR and EOR of the as-synthesized PtCu/GO hybrids has been evaluated in alkaline solution. Compared to commercial Pt/C, the PtCu/GO hybrids exhibit much higher mass activity and stability. The mass activities toward ORR/EOR on Pt_75.4Cu_24.6/GO hybrids are 5.3/2.36 times higher than the commercial Pt/C. This study proves that the as-synthesized PtCu/GO hybrids can be used as improved catalysts for ORR and EOR in alkaline medium.

中文翻译：

简便地合成PtCu合金/氧化石墨烯杂化物作为碱性燃料电池的改进电催化剂

碳基材料上负载的Pt基纳米合金的形态可控制备是增强氧还原反应（ORR）和乙醇氧化反应（EOR）催化性能的潜在策略。它们被认为是质子交换膜乙醇燃料电池中不可替代的电极反应。在本文中，我们展示了一种简便的一步合成方法，可以直接制备可组成可调的PtCu合金/氧化石墨烯（GO）杂化物。使用透射电子显微镜，高分辨率透射电子显微镜，能量色散X射线，X射线衍射，电感耦合等离子体和X射线光电子能谱分析了合成的PtCu合金/ GO杂化物的结构。在PtCu合金/ GO杂化物中，PtCu合金纳米颗粒很好地分散在GO上，尺寸小于5.0 nm。已在碱性溶液中评估了合成后的PtCu / GO杂化物对ORR和EOR的催化作用。与商用Pt / C相比，PtCu / GO杂化物表现出更高的质量活性和稳定性。在Pt上开展面向ORR / EOR的群众活动_75.4 Cu _24.6 / GO杂种比市售Pt / C高5.3 / 2.36倍。这项研究证明，合成后的PtCu / GO杂化物可以用作碱性介质中ORR和EOR的改良催化剂。

更新日期：2018-08-07

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南