N/Ce doped graphene supported Pt nanoparticles for the catalytic oxidation of formaldehyde at room temperature

Yaodong Guo; Zhaoying Di; Xiaonan Guo; Ying Wei; Runduo Zhang; Jingbo Jia

doi:10.1016/j.jes.2021.12.033

N/Ce doped graphene supported Pt nanoparticles for the catalytic oxidation of formaldehyde at room temperature

J Environ Sci (China). 2023 Mar:125:135-147. doi: 10.1016/j.jes.2021.12.033. Epub 2022 Jan 5.

Authors

Yaodong Guo¹, Zhaoying Di¹, Xiaonan Guo¹, Ying Wei¹, Runduo Zhang², Jingbo Jia³

Affiliations

¹ State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China.
² State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address: zhangrd@mail.buct.edu.cn.
³ State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address: jiajb@mail.buct.edu.cn.

PMID: 36375899
DOI: 10.1016/j.jes.2021.12.033

Abstract

Pt catalysts with nitrogen-doped graphene oxide (GO) as support and CeO₂ as promoter were prepared by impregnation method, and their catalytic oxidation of formaldehyde (HCHO) at room temperature was tested. The Pt-CeO₂/N-rGO (reduced GO) with a mass fraction of 0.7% Pt and 0.8% CeO₂ exhibited an excellent catalytic performance with the 100% conversion of HCHO at room temperature. Physicochemical characterization demonstrated that nitrogen-doping greatly increased the defect degree and the specific surface area of GO, enhanced the dispersion of Pt and promoted more zero-valent Pt. The synergistic effect between CeO₂ and Pt was also beneficial to the dispersion of Pt. Nitrogen-doping promoted the production of more Ce³⁺ ions, generating more oxygen vacancies, which was conducive to O₂ adsorption. As a result, the catalyst exhibited enhanced redox properties, leading to the best catalytic activity. Finally, an attempt to propose the reaction mechanism of HCHO oxidation has been made.

Keywords: Formaldehyde; N-doped graphene oxide; Pt catalyst; Room temperature.