PGM nanoparticle-based alumina aerogels for three-way catalyst applications
PGM nanoparticle-based alumina aerogels for three-way catalyst applications
复制标题
用于三效催化剂应用的基于 PGM 纳米颗粒的氧化铝气凝胶
DOI:
10.1016/j.catcom.2022.106547
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发表时间:
2022
影响因子:
3.7
通讯作者:
Carroll, Mary K.
中科院分区:
文献类型:
--
作者:
Anderson, Ann M.;Bruno, Bradford A.;Santos, Joana;Barry, Patrick J.;Carroll, Mary K.
Alumina aerogels doped with PGM nanoparticles are prepared and characterized as candidates for three-way catalysts (TWCs). After heat-treatment at 800 °C the materials maintain low density (∼0.1 g/mL), high surface area (290–460 m2/g) and high pore volume (1.4–3.6 g/m3), but show some agglomeration of the nanoparticles. Pt-, Pd- and Rh-alumina aerogels show TWC activity comparable to a commercial catalyst. Light-off temperatures for CO and propene by Pd/Al2O3aerogels are 190 and 220 °C (respectively) while for NO by Rh/Al2O3aerogel is 250 °C. These materials are loaded at 0.08–0.16 g/L (2–3 g/ft3), considerably lower than typical TWC PGM loadings of 1.8–2.8 g/L (50–80 g/ft3).