A platinum ensemble catalyst for room-temperature removal of formaldehyde in the air
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
A platinum ensemble catalyst for room-temperature removal of formaldehyde in the air
|
|
| Автор |
Vikrant, K.
Chung, M. W. Boukhvalov, D. W. Heynderickx, P. M. Kim, K. -H. Weon, S. |
|
| Тематика |
CATALYTIC OXIDATION
FORMALDEHYDE INDOOR AIR SINGLE-ATOM CATALYST VOLATILE ORGANIC COMPOUNDS AIR ATOMS CATALYTIC OXIDATION DENSITY FUNCTIONAL THEORY MOLECULAR OXYGEN NANOCATALYSTS PLATINUM REACTION KINETICS SURFACE REACTIONS TITANIUM DIOXIDE VOLATILE ORGANIC COMPOUNDS CARCINOGENICS CATALYTIC SYSTEM DRY AIR FORMALDEHYDE OXIDATION INDOOR AIR PERFORMANCE SINGLE-ATOM CATALYST SINGLE-ATOMS SYNTHESISED ]+ CATALYST FORMALDEHYDE |
|
| Описание |
Minimal use of noble metals is ideal in developing catalytic systems against carcinogenic formaldehyde (FA) in air. Although single-atom catalysts (SACs) have been proposed to maximize atomic utilization, metals dispersed to the single-atom limit are less durable in redox environments. A highly dispersed platinum (Pt) ensemble (Ptn) on titanium dioxide (TiO2) was synthesized and validated to achieve 100% conversion of 100 ppm FA in dry air at room temperature (RT) at a gas hourly space velocity of 47,771 h−1. In contrast, Pt SAC (Pt1/TiO2) and a reference Pt nanoparticle catalyst (PtNP/TiO2) exhibited much lower performances. The turnover frequencies (TOFs) of Ptn/TiO2, Pt1/TiO2, and PtNP/TiO2 for the RT FA oxidation reaction were 0.03, 0.01, and 0.005 s−1, respectively. The critical role of the surface lattice oxygen (Olatt) in the overall reaction was supported by the prominence of the Mars van Krevelen kinetics in FA oxidation by the Ptn catalyst. The performance of the PtNP catalyst matched with Ptn only when the Pt loading in the former was raised to 2 wt%. Hence, the Pt dose can be reduced by one-fourth through the ensemble form dispersed at the sub-nanometer scale. The density functional theory simulation also distinguished the roles of different Pt catalysts. The Ptn sites could serve as an oxygen reservoir (effective dissociation of molecular oxygen) to promote proximate reactions (between the adsorbed –CHO and surface Olatt species). Conversely, Pt1 is a single site that restricts proximate reactions with vulnerability to surface poisoning. © 2023 Elsevier B.V.
Ministry of Environment, MOE; Ministry of Science, ICT and Future Planning, MSIP: 2021R1A3B1068304, NRF-2022R1C1C1009128; National Research Foundation of Korea, NRF; Universiteit Gent This work was supported by a grant from the National Research Foundation of Korea funded by the Ministry of Science and ICT (MSIT) of the Korean government (Grant No: 2021R1A3B1068304) and the Basic Science Research Program (NRF-2022R1C1C1009128). M.W. would like to acknowledge support from the Ministry of Environment as “The Graduate School of Particulate Matter Specialization”. P.M.H. would like to thank the Research and Development Program of Ghent University Global Campus (GUGC), Korea. |
|
| Дата |
2024-04-05T16:32:41Z
2024-04-05T16:32:41Z 2023 |
|
| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
|
| Идентификатор |
Vikrant, K, Chung, MW, Boukhvalov, D, Heynderickx, P, Kim, K-H & Weon, S 2023, 'A platinum ensemble catalyst for room-temperature removal of formaldehyde in the air', Chemical Engineering Journal, Том. 475, 146007. https://doi.org/10.1016/j.cej.2023.146007
Vikrant, K., Chung, M. W., Boukhvalov, D., Heynderickx, P., Kim, K-H., & Weon, S. (2023). A platinum ensemble catalyst for room-temperature removal of formaldehyde in the air. Chemical Engineering Journal, 475, [146007]. https://doi.org/10.1016/j.cej.2023.146007 1385-8947 Final All Open Access, Green https://www.scopus.com/inward/record.uri?eid=2-s2.0-85171651205&doi=10.1016%2fj.cej.2023.146007&partnerID=40&md5=3ff6ea37f04db5b7958fce333a6096c2 https://biblio.ugent.be/publication/01HASBX98MYMQBGDH6MHP8C1CA/file/01HASBXRTSK0N8VV70FFK7QS5V.pdf http://elar.urfu.ru/handle/10995/130790 10.1016/j.cej.2023.146007 85171651205 001091493000001 |
|
| Язык |
en
|
|
| Права |
Open access (info:eu-repo/semantics/openAccess)
|
|
| Формат |
application/pdf
|
|
| Издатель |
Elsevier B.V.
|
|
| Источник |
Chemical Engineering Journal
Chemical Engineering Journal |
|