Assembly of hollow mesoporous nanoarchitectures composed of ultrafine Mo2C nanoparticles on N-doped carbon nanosheets for efficient electrocatalytic reduction of oxygen

Yanna Guo, Jing Tang, Joel Henzie, Bo Jiang, Huayu Qian, Zhongli Wang, Haibo Tan, Yoshio Bando, Yusuke Yamauchi

Research output: Contribution to journalArticle

95 Citations (Scopus)

Abstract

A simple method is developed to assemble Mo2C nanocrystals on the surfaces of hollow, highly conductive mesoporous nanoparticles. Diblock copolymer (PS-b-PEO) micelles are used as templates to assist in the fast complexation of molybdate (MoO4 2-) and polydopamine (PDA) precursors to make hollow precursor MoO4 2-/PDA/PS-b-PEO particles. Then these particles are carbonized to generate mesoporous N-doped carbon nanosheets riddled with ultrafine molybdenum carbide (Mo2C) nanoparticles (MMo2C/NCS). An N-doped carbon matrix serves as an electron conductor and helps to prevent the aggregation of the Mo2C nanoparticles. The Mo2C nanoparticles in turn enhance the catalytic performance for the oxygen reduction reaction (ORR). The unique mesoporous 2D nanosheet and its derived 3D hollow structure expose numerous active catalytic sites while enabling free diffusion of the electrolyte and mass transfer. Based on these properties, MMo2C/NCS show enhanced catalytic activity for the ORR.

Original languageEnglish
Pages (from-to)1171-1177
Number of pages7
JournalMaterials Horizons
Volume4
Issue number6
DOIs
Publication statusPublished - 2017 Nov

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Process Chemistry and Technology
  • Electrical and Electronic Engineering

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