Title Page
Contents
ABSTRACT IN KOREAN 12
PART I. General Introduction 14
I. ELECTROCHEMICAL WATER SPLITTING 14
1. Fundamentals of water splitting 14
2. Mechanism of HER 18
3. Electrocatalytic parameters 21
II. REFERENCES 26
PART II. Ru-Mo Bimetallic Phosphide as an Effective Electrocatalyst for Hydrogen Evolution Reaction 27
I. INTRODUCTION 27
II. EXPERIMENTAL DETAILS 31
1. Reagents and Materials 31
2. Material synthesis 32
3. Structural characterization 39
4. Electrochemical characterization 40
III. RESULTS AND DISCUSSION 41
1. Structural characterization 41
2. Electrochemical characterization 47
IV. CONCLUSIONS 54
V. REFERENCES 55
ABSTRACT 60
Table 1. HER performance of Pt, Ni foam, Mo-P/NF, and Ru-Mo-P/NF at 0.5 M H₂SO₄. 50
Table 2. HER performance of Pt, Ni foam, Mo-P/NF, and Ru-Mo-P/NF at 1 M KOH. 52
Figure 1.1. Schematic diagram of water splitting in acidic conditions. 17
Figure 1.2. The mechanism of hydrogen evolution reaction (HER) on the surface of... 20
Figure 2.1. Schematic illustration of the synthesis of Ru-Mo-P/NF. 35
Figure 2.2. Schematic illustration of tube furnace. With an argon gas flow, the P... 36
Figure 2.3. Graph of annealing conditions during phosphorization. 37
Figure 2.4. Actual images of (A) cleaned Ni foam, (B) Mo precursor/NF after... 38
Figure 3.1. (A) XRD results of Mo precursor/NF, Mo-P/NF, and Ru-Mo-P/NF, and... 42
Figure 3.2. XRD results of Ru-Mo-P/NF. 43
Figure 3.3. SEM images of the Ru-Mo-P/NF at different magnifications. 44
Figure 3.4. EDX elemental mapping images of Ru, Mo, P, and Ni in Ru-Mo-P/NF. 45
Figure 3.5. EDX spectrum of Ru-Mo-P/NF. 46
Figure 3.6. (A) HER polarization curves of Pt, Ni foam, Mo-P/NF, and Ru-Mo-P/NF... 49
Figure 3.7. (A) HER polarization curves of Pt, Ni foam, Mo-P/NF, and Ru-Mo-P/NF... 51
Figure 3.8. Overpotentials of NF, Mo-P/NF, Ru-Mo-P/NF, and Pt at -10 mA cm-2 in...[이미지참조] 53