期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Effect of IB-metal on Ni/SiO2 catalyst for selective hydrogenation of acetylene 被引量:9
1
作者 Hua Liu mengqian chai +5 位作者 Guangxian Pei Xiaoyan Liu Lin Li Leilei Kang Aiqin Wang Tao Zhang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第7期1099-1108,共10页
The IB metal(Au,Ag and Cu)alloyed Pd single atom catalysts had been proved to be efficient in promoting the selectivity for hydrogenation of acetylene to ethylene.As a base metal in the same group as Pd,the Ni-based c... The IB metal(Au,Ag and Cu)alloyed Pd single atom catalysts had been proved to be efficient in promoting the selectivity for hydrogenation of acetylene to ethylene.As a base metal in the same group as Pd,the Ni-based catalysts are also active for hydrogenation reactions.Herein,the effects of the IB metals on the Ni/SiO2 catalyst for the selective hydrogenation of acetylene were systematically studied.Different from the Pd/SiO2 catalyst,the monometallic Ni/SiO2 catalyst is not active at low temperatures.The addition of the IB metals to the Ni/SiO2 catalysts can greatly enhance the activity.Besides,the catalytic activity of the AuNix/SiO2 and CuNix/SiO2 catalysts increase with the reduction temperature,while the AgNix/SiO2 catalysts are not sensitive to the pretreatment temperature.The origin of the effect of the different IB metals on the Ni-based catalysts for selective hydrogenation of acetylene is discussed based on the characterizations by XRD,TPR and microcalorimetric measurements. 展开更多
关键词 ACETYLENE Selective hydrogenation ETHYLENE Ni IB metals
下载PDF
SiO_2-supported Au-Ni bimetallic catalyst for the selective hydrogenation of acetylene 被引量:8
2
作者 mengqian chai Xiaoyan Liu +6 位作者 Lin Li Guangxian Pei Yujing Ren Yang Su Hongkui Cheng Aiqin Wang Tao Zhang 《Chinese Journal of Catalysis》 EI CSCD 北大核心 2017年第8期1338-1346,共9页
Supported Au catalysts have been reported to exhibit high ethylene selectivity in the hydrogenation of acetylene,but the conversion is relatively low.Adding a second metal to Au has proven to be a promising approach t... Supported Au catalysts have been reported to exhibit high ethylene selectivity in the hydrogenation of acetylene,but the conversion is relatively low.Adding a second metal to Au has proven to be a promising approach to enhance its catalytic performance in acetylene hydrogenation.In this work,SiO2‐supported Au‐Ni bimetallic catalysts were synthesized and investigated in the selective hydrogenation of acetylene.The Au‐Ni bimetallic catalysts exhibited much higher catalytic performance than that of the corresponding monometallic Au or Ni catalysts.By tuning the reduction temperature and/or Ni loading,we obtained an Au‐Ni/SiO2catalyst with optimal performance.The results of transmission electron microscopy imaging revealed that the Au‐Ni bimetallic particles were highly dispersed on the SiO2support.Meanwhile,analysis of the bimetallic catalyst by energy‐dispersive X‐ray spectroscopy,high‐resolution transmission electron microscopy,and in situ diffuse reflectance infrared Fourier transform spectroscopy demonstrated the formation of Au‐Ni alloy,which contributed to the synergistic effect between Au and Ni in the hydrogenation of acetylene. 展开更多
关键词 GOLD NICKEL Bimetallic catalyst Synergistic effect Acetylene hydrogenation
下载PDF
Isolation of Pd atoms by Cu for semi-hydrogenation of acetylene: Effects of Cu loading 被引量:4
3
作者 Guangxian Pei Xiaoyan Liu +2 位作者 mengqian chai Aiqin Wang Tao Zhang 《Chinese Journal of Catalysis》 EI CSCD 北大核心 2017年第9期1540-1548,共9页
Cu‐alloyed Pd single‐atom catalysts exhibit excellent catalytic performance for the semi‐hydrogenation of acetylene;however,the limit of the Cu/Pd atomic ratio for forming the alloyed Pd single‐atom catalyst is am... Cu‐alloyed Pd single‐atom catalysts exhibit excellent catalytic performance for the semi‐hydrogenation of acetylene;however,the limit of the Cu/Pd atomic ratio for forming the alloyed Pd single‐atom catalyst is ambiguous.Herein,silica‐supported Cu-Pd bimetallic catalysts with fixed Pd content and varied Cu loadings were synthesized using an incipient wetness co‐impregnation method.The X‐ray absorption spectroscopy results indicated that Pd formed an alloy with Cu after reduction at250°C and that the Pd atoms were completely isolated by Cu for Cu/Pd atomic ratios≥40/1.Notably,increasing the reduction temperature from250to400°C hardly affected the catalytic performances of the Cu-Pd/SiO2catalysts.This finding can be attributed to the similar chemical environments of Pd demonstrated by the X‐ray absorption spectroscopy results. 展开更多
关键词 Copper PALLADIUM Single‐atom catalyst X‐ray absorption spectroscopy Acetylene hydrogenation Excess ethylene
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部