4.7 Article

Au@Ir core-shell nanowires towards oxygen reduction reaction

期刊

CHEMICAL ENGINEERING JOURNAL
卷 421, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.129760

关键词

Low temperature fuel cells; Pt-free electrocatalyst; Core-shell structure; Methanol tolerance; Oxygen reduction reaction

资金

  1. Natural Science Foundation of Hainan Province [2019RC007]
  2. Key Research and Development Project of Hainan Province [ZDYF2020037]
  3. National Natural Science Foundation of China [21805104, 51873100]
  4. Fundamental Research Funds for the Central Universities [GK201901002, GK202101005, 2020CSLZ012, 2019TS007]
  5. Innovation Team Project for Graduate Student at Shaanxi Normal University [TD2020048Y]
  6. National Training Program of Innovation and Entrepreneurship for Undergraduates [S202010718130]
  7. Open Foundation of Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured Materials at Guangxi University [2021GXYSOF02]
  8. 111 Project [B14041]

向作者/读者索取更多资源

The study successfully developed a rapid synthesis method for high-quality Au@Ir core-shell nanowires, demonstrating their potential application in electrocatalysis with superior catalytic activity and durability.
Noble metal based one-dimensionally (1D) bimetallic nanostructures are attracting increasing interest in energy conversion field because of their structural advantages and tunable chemical composition. At present, the facile and efficient synthesis of high-quality Au-core noble metal-shell nanowires still maintains the challenge. Herein, we develop a feasible one-pot chemical-reduction strategy to rapidly synthesize high-quality Au@Ir core-shell nanowires (Au@Ir CSNWs) in 1-naphthol ethanol solution and explore their potential application in electrocatalysis. Expermattial results show the formation core-shell structure originates from the deposition-growth of Ir atoms at preferentially generated Au nanowires surface. When using as an electrocatalyst towards oxygen reduction reaction (ORR) in alkaline media, Au@Ir CSNWs show Pt-like ORR electroactivity due to the compositional synergism effect and structural advantages of 1D nanowires, accompanying with excellent durability and extremely enhanced methanol tolerance towards ORR.

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