标题: Porous graphitized carbon-supported Pt for catalytic oxidation of carbon monoxide and formaldehyde under ambient conditions

作者: Liu, XY (Liu, Xinyi); Li, JJ (Li, Jinjun); Guo, JT (Guo, Juntao); Zhang, YH (Zhang, Yihui); Wang, WY (Wang, Wenyu); Wu, F (Wu, Feng); You, ZX (You, Zhixiong); Hao, ZP (Hao, Zhengping); Zhang, ZS (Zhang, Zhongshen)

来源出版物: SEPARATION AND PURIFICATION TECHNOLOGY 卷: 361 文献号: 131512 DOI: 10.1016/j.seppur.2025.131512 Published Date: 2025 JUL 19 子辑: 2

摘要: Ambient-temperature catalytic oxidation is an ideal strategy for eliminating carbon monoxide and formaldehyde from indoor air. However, the difficulty in activating oxygen molecules at low temperatures severely limits its application due to its spin-prohibited nature. Herein, we show that platinum supported on porous graphitized carbon (Pt/PGC) features enhanced electron density and thus readily activate oxygen molecules. Density functional theory computations demonstrate that the improved sp2-hybridization and reduced oxygenated groups of PGC are responsible for the electronic modifications to Pt. Consequently, Pt/PGC performs better in the catalytic elimination of carbon monoxide and formaldehyde than activated carbon-supported Pt at ambient temperature. In addition, reduction of the catalyst in hydrogen at elevated temperatures can consume the sp3-hybridized carbon and oxygenated groups, thereby promoting the catalytic activity. The tuning of electronic metalgraphitized carbon interaction is therefore a promising strategy for designing carbon-supported catalysts for catalytic oxidation applications.

作者关键词: Air purification; Catalytic oxidation; Carbon monoxide; Formaldehyde; Pt/PGC

KeyWords Plus: CO OXIDATION; LOW-TEMPERATURE; PREFERENTIAL OXIDATION; MOLECULAR-OXYGEN; ONE-STEP; NANOPARTICLES; PERFORMANCE; PLATINUM; OXIDE; TIO2

地址: [Liu, Xinyi; Li, Jinjun; Guo, Juntao; Zhang, Yihui; Wang, Wenyu; Wu, Feng; You, Zhixiong] Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bio, Wuhan 430079, Peoples R China.

[Hao, Zhengping; Zhang, Zhongshen] Univ Chinese Acad Sci, Res Ctr Environm Mat & Pollut Control Technol, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China.

通讯作者地址: Li, JJ (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bio, Wuhan 430079, Peoples R China.

Zhang, ZS (通讯作者)，Univ Chinese Acad Sci, Res Ctr Environm Mat & Pollut Control Technol, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China.

电子邮件地址: lijinjun@whu.edu.cn; zszhang@ucas.ac.cn

影响因子：8.2