Pt Nanowires on Monolayered Graphene Oxide for Electrocatalytic Oxidation of Methanol,ACS Applied Nano Materials

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Pt Nanowires on Monolayered Graphene Oxide for Electrocatalytic Oxidation of Methanol
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2022-08-23 , DOI: 10.1021/acsanm.2c03358
Jie Zhao ₁ , Hao Zeng ₁ , Zhe-Xue Lu ₁

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How to improve the catalytic performance of platinum (Pt) catalysts for direct methanol fuel cells (DMFCs) has attracted extensive attention. Herein, by using monolayer graphene oxide (GO) as the support, composite microspheres composed of intertwined Pt nanowires and GO (PtNW-GO) were synthesized at room temperature by a surfactant-free chemical reduction method. Electrocatalytic methanol oxidation reaction (MOR) tests showed that, compared with commercial Pt-C, PtNW-GO have a higher MOR activity (which is about 3 times that of commercial Pt-C), lower onset potential, better anti-CO toxicity, and better durability. The better electrocatalytic performance is attributed to the nanowire morphology of Pt, the specific properties of reduced GO, the intertwined structure of GO and Pt, and the synergistic effect between GO and Pt. This work provides an idea for the synthesis of efficient Pt-based composite catalysts for DMFC application.

中文翻译：

用于甲醇电催化氧化的单层氧化石墨烯上的 Pt 纳米线

如何提高铂（Pt）催化剂用于直接甲醇燃料电池（DMFC）的催化性能已引起广泛关注。在此，以单层氧化石墨烯（GO）为载体，在室温下通过无表面活性剂化学还原法合成了由相互缠绕的Pt纳米线和GO组成的复合微球（PtNW-GO）。电催化甲醇氧化反应（MOR）测试表明，与商业 Pt-C 相比，PtNW-GO 具有更高的 MOR 活性（约为商业 Pt-C 的 3 倍）、更低的起始电位、更好的抗 CO 毒性、和更好的耐用性。更好的电催化性能归因于 Pt 的纳米线形态、还原 GO 的特殊性质、GO 和 Pt 的交织结构以及 GO 和 Pt 之间的协同效应。

更新日期：2022-08-23

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