Synthesis of Transition Metal Doped Pt Nanowire for Electrocatalyst in Fuel Cell Reaction
- 주제(키워드) Platinum nanowire , transition metal doping , fuel cell electrocatalyst , oxygen reduction reaction , methanol oxidation reaction
- 발행기관 고려대학교 대학원
- 지도교수 이광렬
- 발행년도 2017
- 학위수여년월 2017. 8
- 학위구분 석사
- 학과 대학원 화학과
- 세부전공 무기화학 전공
- 원문페이지 75 p
- 실제URI http://www.dcollection.net/handler/korea/000000076386
- 본문언어 영어
- 제출원본 000045915465
초록/요약
Engineering metal nanoparticles provides a powerful route to design electrocatalysts for the future energy and environmental industries. Therefore, it is important to understand how the parameters such as particle sizes, crystalline structures, shapes and compositions influence their electrocatalytic activity and durability. One-dimensional (1D) Pt alloy nanostructure is a promising material for advanced catalysis because they possess several advantages such as high conductivity and robustness, compared with their 0D counterparts. In addition, introducing new element as a dopant can induce structural transformation as well as compositional variation of nanoparticles. Therefore, doping transition metal to 1D Pt nanostructure can cause structural and compositional development, which results in enhanced catalytic activity and durability. Herein, we report the synthesis of a novel ternary nanocatalyst based on Mo doped PtNi dendritic nanowires (Mo-PtNi DNW) and its bifunctional application in the methanol oxidation reaction (MOR) at the anode and the oxygen reduction reaction (ORR) at the cathode for direct methanol fuel cells. An unprecedented Mo-PtNi DNW is combined with 1D morphology and dendritic surfaces generated by molybdenum (Mo) and carbon monoxide (CO). In both MOR and ORR, Mo-PtNi DNW exhibits superior activity to Pt/C and Mo doped Pt dendritic nanowires (Mo-Pt DNW), and excellent durability. This work highlights the important role of compositional and structural control in nanocatalysts for boosting catalytic performances.
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ABSTRACT.......................................................................................................i
TABLE OF CONTENTS.................................................................................iii
LIST OF FIGURE............................................................................................iv
LIST OF TABLE..............................................................................................ix
CHAPTER 1. Introduction...............................................................................1
1.1 Parameters to enhance catalytic performances of the nanoparticles.....1
1.2 Advantages of Pt-based 1D structure for nanocatalysts.............9
1.3 Research objective..........................................................................13
1.4 References.........................................................................................14
CHAPTER 2. Synthesis of Mo-doped PtNi dendritic nanowires as a highly active bifunctional electrocatalyst.....................................................................18
2.1 Introduction.......................................................................................19
2.2 Experimental section.........................................................................22
2.3 Results and discussions.....................................................................27
2.4 Conclusion.....................................................................56
2.5 References.........................................................................................57
ACKNOWLEDGEMENT..............................................................62
