期刊
MATERIALS HORIZONS
卷 4, 期 6, 页码 1171-1177出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7mh00586e
关键词
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资金
- Grants-in-Aid for Scientific Research [15F15766] Funding Source: KAKEN
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 (MoO42-) and poly-dopamine (PDA) precursors to make hollow precursor MoO42-/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.
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