Construction of dual-functional sites via Ru pre-loading on (VO x ) n /CeO 2 for multi-pollutant control
Year: 2025
Type: article
Abstract: Vanadium–ceria catalysts have become promising bifunctional catalysts for simultaneously removing nitrogen oxides (NOx) and chlorobenzene (CB). However, limited selectivity toward inorganic chlorine species and the accumulation of chlorine species remain critical challenges. In this study, a Ru-modified (VOx)n/CeO2 catalyst was synthesized via a pre-loading strategy. The pre-loaded Ru species not only created highly active redox sites favorable for deep CB oxidation through strong interactions with the CeO2 support but also enhanced the polymerization of V species and modulated the electronic environment of V=O species, enhancing the SCR activity and the ability to cleave C–Cl bonds. Importantly, the Ru pre-loading preserved Brønsted acid site concentrations while decreasing Lewis acid site density, thereby reducing Cl deposition and improving catalyst stability. As a result, the optimized catalyst demonstrated superior performance, achieving over 90% NOx and CB conversion in the 330~400 °C temperature range. The selectivities towards inorganic chlorine species (IC) and COx are both maintained above 90%.
Source: Nano Research
Authors: Deli Chen, Wenzhe Si, Xing Yuan, Yue Peng, Junhua Li
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $5,290
OpenAlex ID: W4413494629