Xie Shaohua, Liu Liping, Li Yuejin, Ye Kailong, Kim Daekun, Zhang Xing, Xin Hongliang, Ma Lu, Ehrlich Steven N, Liu Fudong
Department of Chemical and Environmental Engineering, Bourns College of Engineering, Center for Environmental Research and Technology (CE-CERT), Materials Science and Engineering (MSE) Program, University of California, Riverside, CA, USA.
Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL, USA.
Nat Commun. 2024 Sep 12;15(1):7988. doi: 10.1038/s41467-024-52382-7.
Internal combustion engine fueled by carbon-free hydrogen (H-ICE) offers a promising alternative for sustainable transportation. Herein, we report a facile and universal strategy through the physical mixing of Pt catalyst with zeolites to significantly improve the catalytic performance in the selective catalytic reduction of nitrogen oxides (NO) with H (H-SCR), a process aiming at NO removal from H-ICE. Via the physical mixing of Pt/TiO with Y zeolite (Pt/TiO + Y), a remarkable enhancement of NO reduction activity and N selectivity was simultaneously achieved. The incorporation of Y zeolite effectively captured the in-situ generated water, fostering a water-rich environment surrounding the Pt active sites. This environment weakened the NO adsorption while concurrently promoting the H activation, leading to the strikingly elevated H-SCR activity and N selectivity on Pt/TiO + Y catalyst. This study provides a unique, easy and sustainable physical mixing approach to achieve proficient heterogeneous catalysis for environmental applications.
由无碳氢燃料驱动的内燃机（H-ICE）为可持续交通提供了一种很有前景的替代方案。在此，我们报道了一种简便通用的策略，即通过将铂催化剂与沸石进行物理混合，以显著提高在以氢气选择性催化还原氮氧化物（NO）（H-SCR）中的催化性能，该过程旨在从H-ICE中去除NO。通过将Pt/TiO与Y沸石物理混合（Pt/TiO + Y），同时实现了NO还原活性和N选择性的显著提高。Y沸石的加入有效地捕获了原位生成的水，在Pt活性位点周围营造了一个富水环境。这种环境削弱了NO的吸附，同时促进了H的活化，导致Pt/TiO + Y催化剂上的H-SCR活性和N选择性显著提高。本研究提供了一种独特、简便且可持续的物理混合方法，以实现用于环境应用的高效多相催化。
