환원법을 이용한 연료전지용 전극제조 및 광전기화학 분석법에 의한 분리판 특성 연구

Title
환원법을 이용한 연료전지용 전극제조 및 광전기화학 분석법에 의한 분리판 특성 연구
Authors
김관성
Keywords
환원법을이용한연료전지용전극제조및광전기화학분석법에의한분리판특성연구
Issue Date
2012
Publisher
인하대학교
Abstract
Part 1. Synthesis of Pt-Bi/Carbon Electrodes by Reduction Method for Direct Methanol Fuel Cell Pt-Bi/C catalysts supported on carbon black(Vulcan XC-72R) with various Pt/Bi ratios were synthesized by a reduction method. Chloroplatinic acid hydrate(H2PtCl6∙xH2O) and bismuth(?V) nitrate pentahydrate(Bi(NO3)3∙5H2O) was used as precursors for Pt and Bi, respectively. Before loading metal on carbon, heat treatment and pretreatment of carbon black in an acidic solution was conducted to enhance the degree of dispersion. The physical property of the synthesized catalysts was investigated by XRD (X-ray Diffraction) and XPS (X-ray Photoelectron Spectroscopy). The XRD pattern of untreated Pt-Bi/C catalyst showed BiPt and Bi2Pt peaks in addition to Pt peaks. The catalytic activity for methanol oxidation was measured using cyclic voltammetry (CV) in a mixture of 0.5 M H2SO4 and 0.5 M CH3OH aqueous solution. The addition of proper amount of Bi was found to significantly improve catalytic activity for methanol oxidation. The catalytic activity for methanol oxidation was closely related to the stability between electrode and electrolyte. In order to investigate the stability of catalysts, chronoamperometry (CA) analysis was carried out in the same solution at 0.6V.
Description
Part 1. Synthesis of Pt-Bi/Carbon Electrodes by Reduction Method for Direct Methanol Fuel Cell 1 1. 서론 2 2. 이론적 배경 5 2.1. DMFC의 기본 원리 5 2.2. DMFC용 이원 촉매(bimetallic catalyst) 7 3. 실험 방법 8 3.1. 촉매 제조 8 3.2. 물성 분석 및 전기화학적 특성 평가 10 4. 결과 및 고찰 12 4.1. Pt-Bi/C 촉매의 물성 분석 12 4.2. Pt-Bi/C 촉매의 전기화학적 특성 분석 22 5. 결론 32 6. 참고문헌 34 Part 2. A study on the properties of separator by Photo-Electrochemical Techniques 37 1. 서론 38 2. 이론적 배경 41 2.1. 스테인리스강 41 2.2. 400계 스테인리스강 42 3. 실험 방법 44 3.1. 시편 준비 및 물성 분석 44 3.2. Unbiased photocurrent 측정실험 46 3.3. Transition time 측정실험 47 3.4. 전압에 따른 광전류 측정실험 48 3.5. Mott-Schottky 측정실험 49 4. 결과 및 고찰 50 4.1. XPS 결과 50 4.2. Unbiased photocurrent 측정결과 55 4.3. Transition time 측정결과 59 4.4. 전압에 따른 광전류 측정결과 61 4.5. Mott-Schottky 측정결과 64 5. 결론 70 6. 참고문헌 75
URI
http://dspace.inha.ac.kr/handle/10505/23684
Appears in Collections:
College of Engineering(공과대학) > Chemical Engineering (화학공학) > Theses(화학공학 석박사 학위논문)
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