Ultralow Pt Catalyst for Formaldehyde Removal: The Determinant Role of Support

Qiyan Wang; Chunlei Zhang; Lei Shi; Gaofeng Zeng; Hui Zhang; Shenggang Li; Ping Wu; Yelei Zhang; Yiqiu Fan; Guojuan Liu; Zheng Jiang; Zhi Liu; Yuhan Sun

doi:10.1016/j.isci.2018.11.011

Ultralow Pt Catalyst for Formaldehyde Removal: The Determinant Role of Support

iScience. 2018 Nov 30:9:487-501. doi: 10.1016/j.isci.2018.11.011. Epub 2018 Nov 10.

Authors

Qiyan Wang¹, Chunlei Zhang², Lei Shi², Gaofeng Zeng³, Hui Zhang⁴, Shenggang Li⁵, Ping Wu⁶, Yelei Zhang¹, Yiqiu Fan⁶, Guojuan Liu⁶, Zheng Jiang⁷, Zhi Liu⁸, Yuhan Sun⁹

Affiliations

¹ CAS Key Laboratory of Low-carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China; School of Chemical Sciences, University of Chinese Academy of Science, Beijing 100049, China.
² CAS Key Laboratory of Low-carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China; School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
³ CAS Key Laboratory of Low-carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China; School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China. Electronic address: zenggf@sari.ac.cn.
⁴ State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
⁵ CAS Key Laboratory of Low-carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China; School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
⁶ CAS Key Laboratory of Low-carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.
⁷ Shanghai Synchrotron Radiation Facility, 2019 Jialuo Road, Shanghai 201800, China.
⁸ School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China; State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
⁹ CAS Key Laboratory of Low-carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China; School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China. Electronic address: sunyh@sari.ac.cn.

Abstract

Supported Pt catalyst has been intensively investigated for formaldehyde elimination owing to its superior reactivity at room temperature (RT). However, the high Pt content is challenging because of its high cost. Herein, we report PbO-supported Pt catalysts with only 0.1 wt % Pt, which can achieve complete conversion of formaldehyde and reliable stability at RT under demanding conditions. Both experiments and simulations demonstrate that PbO interacts strongly with the Pt species, resulting in tight Pb-O-Pt bonding at the metal/support interface and concomitant activation of the surface lattice oxygen of the support. Moreover, PbO exhibits an extremely high capacity of formaldehyde capture through methylene glycol chemisorption rather than the common hydroxyl-associated adsorption, presenting a different reaction mechanism because the active surface lattice oxygen in the vicinity of Pt species offers improved reactivity. This work provides a valuable example for the design of an efficient catalyst for formaldehyde and potentially oxidation of other carbohydrates.

Keywords: Catalysis; Chemical Substance; Chemistry.