Photochemical reaction system
A photochemical reaction and carbon compound technology, applied in organic chemistry, inorganic chemistry, chemical instruments and methods, etc., can solve problems such as no consideration, no successful CO2 reduction reaction, etc.
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no. 1 approach
[0087] use Figure 3 to Figure 12 The photochemical reaction device of the first embodiment will be described.
[0088] The photochemical reaction device according to the first embodiment is a photochemical reaction cell comprising an oxidation catalyst layer 19, a reduction catalyst layer 20, and a multi-junction solar cell 17 formed therebetween, and a photochemical reaction cell in which ions flow in the oxidation catalyst layer 19. An example of an ion transfer path transferred between and the reduction catalyst layer 20 . Thus, the H generated on the side of the oxidation catalyst layer 19 can be made + Transferred to the reduction catalyst layer 20 with high photoreaction efficiency, the H + Carbon dioxide is decomposed on the reduction catalyst layer 20 side. Next, the first embodiment will be described in detail.
[0089] [Structure of the first embodiment]
[0090] First, the structure of the photochemical reaction device of the first embodiment will be described...
Embodiment 1
[0148] Example 1 is an example of the photochemical reaction cell in the photochemical reaction device of the first embodiment. More specifically, the photochemical reaction cell in Example 1 has the ability to transport only H + The through hole 52 has a larger circle equivalent diameter. Here, 12 types (evaluation battery numbers 1-1 to 1-12) were prepared in which the circle-equivalent diameters of the through holes 52 were 50 μm, 100 μm, and 200 μm, and the area ratios were 10%, 20%, 30%, and 40%. ) different photochemical reaction cells, and evaluate their CO 2 photoreduction efficiency. The photochemical reaction cells in these Examples 1 were fabricated as follows.
[0149] First, prepare a structure having a multi-junction solar cell 17 made of a pin-type a-Si layer, an a-SiGe layer, and an a-SiGe layer, and a multi-junction solar cell 17 made of ITO formed on the surface of the multi-junction solar cell 17. The oxidation electrode layer 18, the reduction electrode...
Embodiment approach
[0160] use Figure 13 to Figure 19 The photochemical reaction device of the second embodiment will be described.
[0161] according to Figure 12 The experimental results in , when the through hole 52 is formed as the ion transfer path, the CO 2 The photoreduction efficiency is mainly determined not only by the H of the via hole 52 + The transmission efficiency is determined, and is also determined by the amount of light absorbed by the multi-junction solar cell 17 . This is because, when the through-hole 52 is provided in the photochemical reaction cell, the area of the multi-junction type solar cell 17 is reduced, thereby reducing the light absorption amount. As a result, the number of electrons and holes generated by light decreases to lower the reaction efficiency of the redox reaction. Therefore, it is required to suppress the loss of the amount of light absorbed by the multi-junction solar cell 17 caused by the formation of the through hole 52 .
[0162] In contra...
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