Surface treatment apparatus for surface-treating powder and method of surface-treating powder using the same
A surface treatment and equipment technology, applied in the field of surface treatment equipment, can solve the problems of difficult mass production, deposition of metal precursors, etc.
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experiment example 1
[0110] Experimental Example 1: Comparison of Powder Charges
[0111] It should be understood that under the same conditions of time (ie, the same number of cycles), the powder charge in the embodiment was increased from 1 g in the comparative example to 12 g. In particular, in the comparative example, 1 g of powder was filled into one chamber. On the contrary, in the example, a plurality of subchambers each including 3 g of powder filled therein are loaded into the accommodating space, and move toward the discharge part step by step (from the first section to the fourth section), and each time the subchambers Loading or moving of the chamber, supply gas five times. Here, since the charge amount of the powder is increased by about 12 times under the condition of supplying the same amount of gas for the same number of times (20 times), the surface treatment of the powder can be effectively performed.
experiment example 2
[0112] Experimental example 2: STEM image analysis
[0113] Figure 12 Shown are scanning transmission electron microscope (STEM) images of powders (ie, Pt-supported catalysts) that were sequentially surface treated in the subchambers of the first and fourth sections in the example. Figure 13 shows other STEM images of the Pt-loaded catalyst in the subchamber in the first section in the example, and Figure 14 Additional STEM images of the Pt-supported catalyst in the subchamber in the fourth section of the example are shown.
[0114] refer to Figure 12 to Figure 14 , it should be understood that, compared with the comparative example, for the Pt-supported catalyst produced in the example, the uniformity of the Pt coating of the Pt-supported catalyst disposed in the subchamber, especially the fourth section, is obtained improve. Furthermore, it should be understood that the amount of Pt carried in the subchambers in the fourth section is increased compared to the subcham...
experiment example 3
[0115] Experimental Example 3: Electrochemical Activity Analysis
[0116] From Table 1, it can be seen that within the same process time (ie, the same number of cycles), the charge quantity (QH, mC) of the hydrogen desorption of the surface-treated powder (ie, Pt-supported catalyst) increases. Furthermore, it should be appreciated that the electrochemical surface area (ECSA) increased substantially from 111.8 m2 / g to 189.6 m2 / g at the same process time (ie, the same number of cycles). In the case of the example (subchamber in the fourth section), it is understood that excellent catalyst properties can be achieved through stepwise movement and ALD processes. In other words, it is understood that even though the ALD process was repeatedly performed 20 cycles in Examples and Comparative Examples, significant differences were shown between the Examples and Comparative Examples in the amount and uniformity of Pt supported on the carbon black powder. In particular, when multiple su...
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