Fabrication of nanocomposite networks using Pd nanoparticles/Polydiphenylamine anchored on the surface of reduced graphene oxide: An efficient anode electrocatalyst for oxidation of methanol

IF 9.9 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Industrial and Engineering Polymer Research Pub Date : 2022-01-01 DOI:10.1016/j.aiepr.2021.08.001

Suba Lakshmi Madaswamy , N. Veni Keertheeswari , Asma A. Alothman , Murefah mana AL-Anazy , Khadraa N. Alqahtani , Saikh M. Wabaidur , Ragupathy Dhanusuraman

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引用次数: 11

Abstract

Direct methanol fuel cells (DMFCs) are an essential aspect of electricity and fuel concerns. Herein, we report a new combination of Palladium nanoparticles anchored on polydiphenylamine with reduced graphene oxide network (rGO/PDPA/Pd) nanohybrid synthesized via an in-situ chemical strategy. The rGO/PDPA/Pd electrocatalyst shows excellent electrocatalytic activity, lower oxidation potential (−0.1 V), improved current density (2.85 mA/cm²), excellent cyclic stability (94%), and longevity (1200 s) towards methanol oxidation reaction (MOR) in the alkaline medium, when compared to commercial Pd/C electrocatalyst. Significantly, the forward oxidation peak potential of rGO/PDPA/Pd electrocatalyst was shifted negatively by 110 mV as compared to commercial Pd/C electrocatalyst. These results suggest that rGO/PDPA/Pd electrocatalyst is considered as an effective anode catalyst for DMFCs.

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Pd纳米粒子/聚二苯胺锚定在还原氧化石墨烯表面制备纳米复合网络:甲醇氧化的高效阳极电催化剂

直接甲醇燃料电池(dmfc)是电力和燃料问题的一个重要方面。在此，我们报道了一种新的钯纳米颗粒与还原氧化石墨烯网络(rGO/PDPA/Pd)的结合，通过原位化学策略合成。与商业Pd/C电催化剂相比，rGO/PDPA/Pd电催化剂表现出优异的电催化活性，较低的氧化电位(- 0.1 V)，提高的电流密度(2.85 mA/cm2)，优异的循环稳定性(94%)，以及在碱性介质中进行甲醇氧化反应(MOR)的寿命(1200 s)。与商用Pd/C电催化剂相比，rGO/PDPA/Pd电催化剂的正向氧化峰电位负移了110 mV。这些结果表明，rGO/PDPA/Pd电催化剂是一种有效的dmfc阳极催化剂。

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