Abstract:CeO2 carrier was synthesized via the sol-gel method, Pd/CeO2 catalysts were prepared using the deposition-precipitation and impregnation method. The catalysts were characterized by TEM and Zeta potential measurement. Results showed the isoelectric points(IEPs) of both catalysts were around 5.0, and metallic Pd particles were well dispersed on CeO2 surface, the average Pd particle sizes on the CeO2 surface grown with the increase of Pd loading amount. Bromate with an initial concentration of 0.39mmol/L was removed by 100% over Pd/CeO2 prepared by the deposition-precipitation method and 71% over Pd/CeO2 prepared by impregnation method after reaction for 50min, exhibiting higher catalytic activity for catalyst prepared by the deposition-precipitation method. The catalytic bromate reduction was not influenced by mass transport limitation. Bromate reduction can be described by the Langmuir–Hinshelwood model, indicating that the reaction was controlled by bromate adsorption. Increasing Pd loading amount resulted in enhanced bromate reduction. Decreasing pH was in favor of catalytic bromate reduction.
周娟, 陈欢, 李晓璐, 万海勤, 万玉秋, 许昭怡. Pd/CeO2催化水中溴酸盐的加氢还原研究[J]. 中国环境科学, 2011, 31(8): 1274-1279.
ZHOU Juan, CHEN Huan, LI Xiao-Lu, WAN Hai-Qin, WAN Yu-Qiu, XU Zhao-Yi. Study on liquid phase catalytic hydrogenation of bromate over Pd/CeO2 catalyst. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(8): 1274-1279.