| Title: | Biogenic Pt/CaCO(3) Nanocomposite as a Robust Catalyst toward Benzene Oxidation |
| Author(s): | Guo Y; Sun Y; Yang DP; Dai J; Liu Z; Chen Y; Huang J; Li Q; |
| Address: | "College of Chemical Engineering and Materials Science , Quanzhou Normal University , Quanzhou 362000 , P. R. China. Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , P. R. China" |
| Journal Title: | ACS Appl Mater Interfaces |
| ISSN/ISBN: | 1944-8252 (Electronic) 1944-8244 (Linking) |
| Abstract: | "Fabricating the highly dispersive and stable Pt nanoparticles (NPs) on an economical and environmentally friendly support is of great concern in the field of catalysis. Herein, a waste eggshell was used as the support to prepare supported Pt catalysts through a plant-mediated biosynthesis method, in which the Pt precursor was reduced to Pt NPs by employing Cacumen platycladi (CP) leaf extract. The temperature and atmosphere for thermal treatment of such eggshell-supported Pt catalysts were assessed to understand their effects on catalytic performance toward the oxidation of benzene. The optimal Pt/eggshell-Ar (calcined at 400 degrees C in Ar) demonstrated that the temperature required for 90% benzene conversion (T(90%)) was as low as 178 degrees C (80?ª+000 mL g(-1) h(-1)) and could operate steadily for at least 300 h of onstream reaction. The structure of the catalyst after reaction is much the same as that of the unreacted one. Transmission electron microscopy (TEM), thermogravimetry (TG), and X-ray photoelectron spectroscopy (XPS) results showed that Pt NPs were evenly distributed on the eggshell supports, and the calcination conditions had important influences on the residual CP leaf extract, the average Pt NPs size, and the ratio of Pt(0)/Pt(2+) over the catalysts. Density functional theory (DFT) calculations indicated that the interactions between Pt NPs and porous CaCO(3) could promote benzene activation adsorbed onto the Pt NPs. In addition, biogenic Pt catalysts were proved to overtake the chemically reduced counterparts in the field of catalytic performance; furthermore, both biogenic and chemically reduced Pt NPs supported on the eggshell demonstrated preferable catalytic activity than that of commercial 5Pt/C (com-Pt/C) catalysts. Collectively, immobilizing biogenic noble metal active components on the eggshell-based support could be a promising approach for the preparation of supported noble metal catalysts with excellent catalytic performance toward catalytic oxidation of volatile organic compounds (VOCs)" |
| Keywords: | biogenic synthesis catalytic benzene oxidation density functional theory eggshell highly dispersive Pt nanoparticles; |
| Notes: | "PubMed-not-MEDLINEGuo, Yunlong Sun, Yuejuan Yang, Da-Peng Dai, Jiajun Liu, Zhilin Chen, Yisong Huang, Jiale Li, Qingbiao eng 2019/12/17 ACS Appl Mater Interfaces. 2020 Jan 15; 12(2):2469-2480. doi: 10.1021/acsami.9b18490. Epub 2019 Dec 30" |
