期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 20, 期 14, 页码 2826-2830出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b919494k
关键词
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资金
- LDRD
- Battelle [DE-AC05-76RL01830]
- China Scholarship Council
- PNNL
- National Science Foundation of China [50872027]
Carbon nanotubes (CNTs) are noncovalently functionalized with poly(allylamine hydrochloride) (PAH) and then employed as the support of Pt nanoparticles. X-Ray photoelectron spectroscopy confirms the successful functionalization of CNTs with PAH. The negatively charged Pt precursors are adsorbed on positively charged PAH-wrapping CNTs surface via electrostatic self-assembly and then in situ reduced in ethylene glycol. X-Ray diffraction and transmission electron microscope images reveal that Pt nanoparticles with an average size of similar to 2.6 nm are uniformly dispersed on CNT surface. Pt/PAH-CNTs exhibit unexpectedly high activity towards oxygen reduction reaction, which can be attributed to the large electrochemical surface area of Pt nanoparticles. It also shows enhanced electrochemical stability due to the structural integrity of PAH-CNTs. This provides a facile approach to synthesize CNTs-based nanoelectrocatalysts.
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