Halloysite Nanotube Supported Ru Nanocatalysts Synthesized by the Inclusion of Preformed Ru Nanoparticles for Preferential Oxidation of CO in H2-Rich Atmosphere
作者： Li Wang , Jiuling Chen , Lei Ge , Victor Rudolph , Zhonghua Zhu
DOI: 10.1021/JP312491M
关键词:
摘要: The small-sized and well-dispersed Ru nanocatalysts supported on halloysite nanotubes (HNTs) were synthesized by the inclusion of preformed nanoparticles onto HNTs (Ru NPs/HNTs) employed for preferential oxidation CO in H2-rich atmosphere (PROX). Polyol reduction was adopted to prepare nanoparticles, synthesis conditions affected morphology resulting nanoparticles. catalysis results show that NPs/HNTs present significantly higher conversion CO2 selectivity than catalyst prepared by traditional wet impregnation. RuCl3 is a better precursor than Ru(acac)3 synthesizing with catalytic reactivity. performance can be further enhanced pretreatment due removal polyvinylpyrrolidone (PVP) capping surface this enhancement more significant at 400 °C 200 °C. Finally, characterizations on the used catalysts indicate maintained after PROX reaction; slight growth particle size observed pretreatment, yet lose their original shape reduction.
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