Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2020-10-07 , DOI: 10.1016/j.apcatb.2020.119613 Shailesh Pathak , Shikha Saini , Kishore Kondamudi , Sreedevi Upadhyayula , Saswata Bhattacharya
The agglomeration and sintering of metal nanoparticles due to poor thermal stability are major causes of catalyst deactivation in many metal loaded catalysts used in industrially important high temperature reactions. This work is taken up choosing an iron oxide nano-catalyst dispersed on a silica surface grown on a SiC support material for an endothermic high temperature and highly corrosive reaction condition such as sulfuric acid decomposition. These combined theoretical and experimental findings not only allow us to design cheaper and stable catalysts but also provide an atomistic insight into the mechanism of the metal-support interaction. Consequently, the successful tuning of the latter helps in enhancement of overall activity and stability. The high activity and stability are attributed to the presence of oxygen deficit sites in the catalyst developed for the model reaction under consideration.
中文翻译:
二氧化硅改性SiC负载的氧化铁催化剂在硫酸分解中增强稳定性和活性的见解
由于热稳定性差而导致的金属纳米颗粒的团聚和烧结是在工业上重要的高温反应中使用的许多负载金属的催化剂中催化剂失活的主要原因。进行这项工作是选择分散在SiC载体材料上生长的二氧化硅表面上的氧化铁纳米催化剂,以用于吸热的高温和高腐蚀性的反应条件(例如硫酸分解)。这些理论和实验结果的结合,不仅使我们能够设计出更便宜,更稳定的催化剂,而且还提供了对金属与载体相互作用机理的原子洞察力。因此,后者的成功调音有助于增强总体活动性和稳定性。