Title Page
Contents
Abstract 9
1. Introduction 10
2. Experimental 12
2.1. Synthesis of Co/CoTe heterostructure 13
2.2. Physical characterization of Co/CoTe 13
2.3. Electrochemical measurements of Co/CoTe 13
3. Results and discussion 14
3.1. Synthesis and characterization of Co/CoTe 15
3.2. Electrochemical measurements 21
4. Conclusions 27
5. References 28
Table 1. Comparison of OER catalytic performance of Co/CoTe with previously reported data 23
Fig. 1. Schematic illustration of CoTe, Co/CoTe, and Co preparation. 15
Fig. 2. XRD patterns of Co-Co PBA (Co3[Co(CN)6]2).[이미지참조] 16
Fig. 3. XRD patterns of CoTe, Co/CoTe, and Co. 17
Fig. 4. (a-b) SEM images of Co-Co PBAs and Co/CoTe microcubes, respectively. (c) Low-magnification TEM image of Co/CoTe, (d) HR-TEM image of Co/CoTe including the three... 19
Fig. 5. XPS survey spectrum of the Co/CoTe. 20
Fig. 6. High-resolution XPS spectra of (a) Co 2p and (b) Te 3d for CoTe, Co/CoTe, and Co. 21
Fig. 7. Electrochemical measurements of the as-prepared samples toward the OER. (a) Polarization curves of CoTe, Co/CoTe, Co, and RuO₂ in N₂-saturated 1.0 M KOH at a scan rate... 24
Fig. 8. (a) XRD pattern and (b) Raman spectra after stability test for 50 h of Co/CoTe microcube. 25
Fig. 9. SEM image after stability test for 50 h of Co/CoTe microcube. 25
Fig. 10. XPS spectra of (a) Co 2p, (b) Te 3d, and (c) O 1s after stability test for 50 h of Co/CoTe microcube. 26