Oxygen Reduction Reaction of Block Copolymer Template-Directed Porous Carbon Catalysts

Cindy Mutiara Septani, Chun Chieh Wang, Ya Sen Sun

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

Functional nitrogen-doped hierarchically porous carbon materials (NHPCMs) have received much attention in recent years because of their electrochemical and catalytic activities, which offer potential applications in the field of fuel cells. Herein we demonstrate the NHPCMs with superior performance of the oxygen reduction reaction (ORR) through spontaneous coassembly of polystyrene-block-poly(ethylene oxide) (PS-b-PEO) micelles along with self-polymerization of dopamine (DA). In this study, we aim to deeply understand the effects of HCl addition, DA content, and aging environment on morphologies of NHPCMs through studying self-assembly and phase behavior of PS-b-PEO/DA mixtures in cosolvent using synchrotron small-angle X-ray scattering and transmission X-ray microscopy. The morphology of hierarchical pores can be successfully obtained by fine controls over DA content and pyrolysis temperature. Correlations of morphologies and processes with the ORR performance indicate that hierarchically porous carbon materials exhibit the highest ORR performance with Jk = 8.1 mA cm-2 (measured at -0.4 V of SCE), low onset potential η = -0.11 V, and four-electron transfer pathway over a wide voltage range.

原文English
頁(從 - 到)897-914
頁數18
期刊ACS Applied Energy Materials
5
發行號1
DOIs
出版狀態Published - 2022 1月 24

All Science Journal Classification (ASJC) codes

  • 化學工程(雜項)
  • 能源工程與電力技術
  • 電化學
  • 電氣與電子工程
  • 材料化學

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