Titanium carbide (Ti3C2) catalyst was prepared by hydrofluoric acid (HF) etching titanium aluminum carbide (Ti3AlC2),which was used as cathode catalyst for photocatalytic reduction of carbon dioxide (CO2) after alkalization of surface groups.The surface properties of cathode catalyst were investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM).CO2 reducibility was tested in photocatalytic fuel cells with titanium dioxide nanotubes (TiO2-NTs) as photoanode.It was found that the reduction performance of Ti3C2 catalyst after surface alkalization was significantly improved,but the cycle stability was poor due to the presence of a large amount of hydrogen ions (H+).Operational stability was enhanced via the introduction of a fluorine-based hydrophobic layer,which reduced the contact between the catalyst and the aqueous solution,and inhibited the damage of H+ to the surface alkaline groups,and enabled the system to run smoothly.
Zhang Jun, Song Yawen, Lv Shuai, Zheng Jili, Yang Penglin
. CO2 reduction in photocatalytic system with modified Ti3C2 cathode[J]. New Chemical Materials, 2021
, 49(10)
: 150
-153
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.10.032
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