Formulating the Li sites of Li-CoO composites for achieving high-efficiency oxidation removal of formaldehyde over the Ag/Li-CoO catalyst under ambient conditions

Room Temperature Catalysts for High Effective Degradation of Formaldehyde: Research Progresses and Challenges

“…Recently, Zhang et al [58] developed Ag@LÀ CO catalysts by one-pot calcination and impregnation method, combining "alkali metal-silver" to synergistically modify cobalt oxide to promote the catalytic oxidation performance of HCHO (330-350 mg/m 3 ). As shown in Figure 7b, the degradation rate of HCHO by LÀ CO catalyst was about 27 %, and when Ag was doped, the degradation rate of HCHO by Ag@LÀ CO catalyst increased to about 73 %, in which the degradation rate of HCHO by LCOÀ S modified with Ag increased by 48 %, whereas the degradation rate of HCHO by the addition of Ag did not change significantly in the case of LCOÀ L catalyst.…”

“…After practical tests, the material could reduce indoor HCHO concen- [57] Time courses of HCHO removal over the LiÀ CoOx, corresponding Agmodified catalysts (b). [58] Reproduced with permission from Elsevier from Zhang et al 2023. [58] © 2024 Wiley-VCH GmbH tration from 0.21 ppm to 0.04 ppm.…”

“…[58] Reproduced with permission from Elsevier from Zhang et al 2023. [58] © 2024 Wiley-VCH GmbH tration from 0.21 ppm to 0.04 ppm. In 2002, Sekine's group [117] also reported the catalytic oxidation of HCHO using various metal oxides, such as Ag Since then, researchers mainly focused on MnO 2 catalysts due to their superior catalytic activity over other transition metal oxides.…”

“…Figure 7. HCHO conversion on the 3D-Co 3 O 4 , Ag/Co 3 O 4 , and KÀ Ag/Co 3 O 4 samples (a);[57] Time courses of HCHO removal over the LiÀ CoOx, corresponding Agmodified catalysts (b) [58]. Reproduced with permission from Elsevier from Zhang et al 2023 [58].…”