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SYNTHESIS OF CARBON SUPPORTED PdSn ELECTROCATALYSTS IN ALKALINE MEDIA FOR DIRECT ALCOHOL FUEL CELL

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ACKNOWELEDGEMENTS

ABSTRACT

摘要

Table of Contents

List of Symbols and Abbreviations

List of Figures

List of Tables

Chapter 1 Literature Review

1.1.Background on Direct Alcohol Fuel Cells

1.1.1.Alternative energy source and fuel cells

1.1.2.Direct alcohol fuel cells(DAFCs)

1.1.3.Kinetics of fuel cells

1.2.Nanoparticles

1.2.1.Properties of nanoparticles

1.2.2.Catalysis

1.2.3.Electrocatalysis

1.2.4.Applications of nanoparticles

1.3.Synthesis of Pd and Pd-based catalysts

1.3.1 Functionalization of support

1.3.2.Supports for palladium-based nanoparticles

1.3.3.Synthesis of Pd nanoparticles

1.3.4 Atabilizer for synthesis of nanoparticles

1.3.5.Early work on PdSn/C Nano-catalysts

1.3.6.PdSn/C catalyst’s future perspective

1.3.7.Synthesis of Pdsn/C by impregnation reduction method

1.4 Aims and Significance of the Study

Chapter 2 Materials and Methods used in the Study

2.1.Materials,Chemicals and Instruments

2.2.Experimental Sections

2.2.1.Preparation of the support

2.2.2.Preparation of PdSn/C catalysts

2.3.Characterization of Catalyst

2.3.1.XRD

2.3.2.TEM

2.4.Electrochemical evaluation

Chapter 3 Results and Discussions

3.1.Electrochemical Evaluation

3.1.1.Tbe effect of metal precursors amount on PdSn/C catalyst

3.1.2.The effect of waiting time on the performance of PdSn/C Catalyst

3.1.3.The effect of waiting temperature on PdSn10.7/C catalyst

3.1.4.The CV of PdSn10.7/C catalyst for sodium hydroxide

3.1.5.The CV of PdSn10.7/C catalyst for different alcohols

3.1.5.Current-time curves onPdSn10.7/C and Pd/C (JM) catalysts

3.2 Morphology components

3.2.1 SEM images

3.2.2.TEM images of PdSn10.7/C electrocatalyst

3.2.3 EDX images of PdSn10.7/C

3.2.4.XRD of PdSn10.7/C electrocatalyst

Chapter 4 Conclusions and Suggestions for Future Study

4.1 Conclusion

4.2 Suggestions for future study

List of References

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摘要

作为替代能源,直接醇类燃料电池由于其重要性受到了研究的大量关注。在本研究中,通过浸渍还原法合成了PdSn8/C,PdSn10/C,PdSn10.3/C,PdSn10.7/C,PdSn11/C和PdSn14/C(23 wt%),并且研究它们在碱性条件下对甲醇和乙醇的氧化还原反应。实验通过X射线衍射透射电子显微镜来表征样品。电化学测试通过循环伏安法和计时安培法来测性样品电化学性能。实验结果发现PdSn10.7/C对甲醇和乙醇的电氧化表现出商用Pd/C更高的活性。所实现的高性能可能是由于在低电位下由锡产生的OH-物种.

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