Ni@ZrO2 yolk-shell catalyst for CO2 methane reforming: Effect of Ni@SiO2 size as the hard-template

This paper reports the usage ratio of TEOS and Zr(OBu)(4) on the formation of Ni@ZrO2 yolk-shell for dry reforming of methane. From XPS analysis, the ZrO2 hollow shell texture is demonstrated to be [TEOS]/[Zr(OBu)(4)]dependent due to different sizes of SiO2 produced. It found that an adequate ratio of [TEOS]/[Zr(OBu)(4)] improves the catalytic conversion of dry reforming of methane. It (Ni@ZrO2-SiZr-7.7) shows 90% conversion for CH4 and 93% for CO2 at a WHSV of 72,000 mLg(cat)(1) h(-1) for 50 h at 800 degrees C with TOFCH4 of 8.7 s(-1). It proposed that the changes in surface Si/Zr and gradual interconnecting pores contributed to its activity and stability. These finding's potential to be utilized in other high-temperature reactions. (C) 2021 Elsevier Inc. All rights reserved.

Automated summary

An appropriate ratio of TEOS and Zr(OBu)(4) can improve the catalytic conversion of dry reforming of methane. The Ni@ZrO2-SiZr-7.7 catalyst shows high conversion rates for CH4 and CO2 at high temperatures, with potential for use in other high-temperature reactions.