RISS 검색 - 국내학술지논문

무료
기관 내 무료
유료

내보내기
내책장담기
한글로보기

정확도순

내림차순

내림차순

10개씩 출력

1
Effect of polydopamine‑modified reduced graphene oxides on the catalytic activity of Pt nanoparticles catalysts for fuel cell electrodes

Joo‑Hyoeng Woo,Soo‑Jin Park,Sungwook Chung,Seok Kim 한국탄소학회 2019 Carbon Letters Vol.29 No.1
- 원문보기
We have studied a method to prepare polydopamine-modified reduced graphene oxide-supported Pt nanoparticles (Pt– PDA–RGO). The Pt–PDA–RGO nanocomposites were synthesized by a wet-coating process, which was induced by selfpolymerization of dopamine. As an eco-friendly and versatile adhesive source in nature, dopamine could be easily adhered to surfaces of organic material and inorganic material via polymerization processes and spontaneous adsorption under weak alkaline pH conditions. To apply the unique features of dopamine, we synthesized Pt–PDA–RGO nanocomposites with a different quantity of dopamine, which are expected to preserve the improved Pt adsorption on graphene, resulting in the enhanced electrocatalytic performance. The morphology and micro-structure were examined by field emission scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy. Compared to pristine Pt–deposited RGO (Pt–RGO), Pt–PDA–RGO (30 wt% dopamine against RGO) nanocomposites showed a superior electrochemical active surface area for a methanol oxidation. This could be related to the fact that the optimized c
2
Study on Effect of Carbon Surface Functionalization on Reduced Graphene Oxide Electrodes for Fuel Cells

Woo, Joo Hyoeng,Jung, Yongju,Kim, Seok American Scientific Publishers 2017 Journal of nanoscience and nanotechnology Vol.17 No.8
- 원문보기
<P>Pt-deposited reduced graphene oxide (RGO) was prepared by a facile method with presence of dopamine hydrochloride in Tris-HCl buffer solution. The electrochemical and morphological property of Pt/(polydopamine (PDA) coated RGO) composite was studied by cyclic voltammetry (CV), field emission scanning electron microscopy (FE-SEM), transmission electron microscope (TEM) and fourier transform infrared spectroscopy (FT-IR). These results show that Pt/PDA/RGO hybrids exhibited not only excellent electrocatalytic active but also long-term stability for the oxidation of methanol in direct methanol fuel cells. In addition, platinum nanoparticles were deposited on the surface of the modified RGO without aggregation of metal catalyst compared to pure graphene oxide. These findings indicated that synthesized Pt/PDA/RGO could be promising candidate for catalyst electrodes in many different kinds of fuel cells.</P>