EFFECT OF Ni ATOMIC PERCENT ON Ni DISPERSION AND CATALYTIC ACTIVITY IN PREPARATION OF CATALYSTS FROM La-Ni INTERMETALLIC COMPOUNDS

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

AYUMU YOKOYAMA¹  KAORU ONOE¹  TADASHI SHIROTSUKA¹ 

[1]Department of Applied Chemistry, Waseda University

关键词: Chemical Reaction;    Rare Earth Compound;    Intermetallic Catalyst;    Hydrogenation;    Oxidation;    Carbon Monoxide;    Dispersion;    Turnover Frequency;    Conductivity;   

DOI  :  10.1252/jcej.19.375

来源: Maruzen Company Ltd

【 摘 要 】

References(8)A previous study showed that oxidation of LaNi5 could produce catalysts with a relatively high Ni dispersion. This study focuses on the effect of Ni atomic percent α upon Ni dispersion δ and turnover frequency TF, using La-Ni compounds. It was found that the value of δ was higher in the order of LaNi5 >La2Ni7 >LaNi3 > LaNi and that this order was related to oxidation rate. The value of TF, on the other hand, was higher in the reverse order, indicating that high oxidation rate causes severe defects on the surface of Ni crystallites.

【 授权许可】

Unknown