Abstract
In this work, an electrode material based on CuO nanoparticles (NPs)/graphene (G) is developed for ORR in alkaline medium. According to the characterization of scanning electron microscope and transmission electron microscope, CuO NPs are uniformly distributed on the wrinkled G sheets. The X-ray diffraction test reveals that the phase of CuO is monoclinic. The CuO/G hybrid electrode exhibits a positive onset potential (0.8 V), high cathodic current density (3.79 × 10−5 mA/cm2) and high electron transfer number (four-electron from O2 to H2O) for ORR in alkaline media. Compared with commercial Pt/C electrocatalyst, the CuO/G electrode also shows superior fuel durability. The high electrocatalytic activity and durability are attribute to the strong coupling between CuO NPs and G nanosheets.
Highlights
Our modern societies have to stand in a transition line from traditional fossil energy to sustainable clean energy, with the increasing demands for environmental and energy sustainability [1,2]
In the development of fuel cells, a considerable number of studies focused on improving its oxygen reduction reaction (ORR)
Cu-complex-hybrid anchored on reduced graphene oxide sheets, which has the high exchanged electron density during ORR process
Summary
Jiemei Yu 1,2 , Taizhong Huang 1 , Zhankun Jiang 1 , Min Sun 1, * and Chengchun Tang 2, *. Received: 20 December 2018; Accepted: 22 January 2019; Published: 26 January 2019
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