| Title: | In Situ Spectroscopic and Computational Studies on a MnO(2)-CuO Catalyst for Use in Volatile Organic Compound Decomposition |
| Author(s): | Kim J; Min YH; Lee N; Cho E; Kim KY; Jeong G; Moon SK; Joo M; Kim DB; Kim J; Kim SY; Kim Y; Oh J; Sato S; |
| Address: | "Materials & Devices Advanced Research Institute, LG Electronics, 38, Baumoe-ro, Seocho-gu, Seoul 137-724, Republic of Korea. Pure Sphere, 123-7, Dongsansaneopdanji-ro, Eunjin-myeon, Nonsan-si, Chungcheongnam-do 320-823, Republic of Korea. Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan" |
| ISSN/ISBN: | 2470-1343 (Electronic) 2470-1343 (Linking) |
| Abstract: | "In situ near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and density functional theory calculations were conducted to demonstrate the decomposition mechanism of propylene glycol methyl ether acetate (PGMEA) on a MnO(2)-CuO catalyst. The catalytic activity of MnO(2)-CuO was higher than that of MnO(2) at low temperatures, although the pore properties of MnO(2) were similar to those of MnO(2)-CuO. In addition, whereas the chemical state of MnO(2) remained constant following PGMEA dosing at 150 degrees C, MnO(2)-CuO was reduced under identical conditions, as confirmed by in situ NEXAFS spectroscopy. These results indicate that the presence of Cu in the MnO(2)-CuO catalyst enables the release of oxygen at lower temperatures. More specifically, the released oxygen originated from the Mn-O-Cu moiety on the top layer of the MnO(2)-CuO structure, as confirmed by calculation of the oxygen release energies in various oxygen positions of MnO(2)-CuO. Furthermore, the spectral changes in the in situ NEXAFS spectrum of MnO(2)-CuO following the catalytic reaction at 150 degrees C corresponded well with those of the simulated NEXAFS spectrum following oxygen release from Mn-O-Cu. Finally, after the completion of the catalytic reaction, the quantities of lactone and ether functionalities in PGMEA decreased, whereas the formation of C=C bonds was observed" |
| Notes: | "PubMed-not-MEDLINEKim, Jungpil Min, Young Hwan Lee, Nodo Cho, Eunkyung Kim, Kye Yeop Jeong, Gitaeg Moon, Seung Kyu Joo, Minho Kim, Dong Baek Kim, Jun Kim, Sang-Yoon Kim, Yong Oh, Jonghyun Sato, Satoshi eng 2017/10/31 ACS Omega. 2017 Oct 31; 2(10):7424-7432. doi: 10.1021/acsomega.7b00962. eCollection 2017 Oct 31" |
