Effect of Hydroxyl Groups on Metal Anchoring and Formaldehyde Oxidation Performance of Pt/Al2O3

• DOI: 10.1021/acs.est.2c01278
• Publication Date: 2022-06-30T11:24:17Z
• Authors: Zhilin Zhang; Guangzhi He; Yaobin Li; Changbin Zhang; Jinzhu Ma; Hong He
• Keywords: Oxidizing agent; Anchoring

Pt/Al2O3 catalysts showing excellent activity and stability have been used in various reactions, including HCHO oxidation. Herein, we prepared Pt–Na/Al2O3 with a Pt content of 0.05 wt % to reveal the key factors determining anchoring as well catalytic mechanism Pt–Na/nano-Al2O3 (denoted Pt–Na/nAl2O3) could completely oxidize CO2 at room temperature, which is lowest oxidation our knowledge. After Na addition, terminal hydroxyl groups HO-μter) on nano-Al2O3 were transformed doubly bridging between Al HO-μbri(Na–Al)), atomically dispersed species. further promoted regeneration HO-μbri(Na–Al) by activating O2 H2O, oxidizing directly fast reaction step ([HCOO–] + [OH]a → H2O). Our study revealed that synergistically generated HO-μter species provided sites for