%0 Journal Article
%T IMPURITY EFFECTS ON CHEMISORPTION OF COMPOSITE CATALYSTS<br>杂质对担载式催化剂化学吸附的影响
%A ZHANG TAO
%A KANG MIN-CHENG
%A LU WEN-CHANG
%A <br>张涛
%A 康敏成
%A 路文昌
%J 物理学报
%D 1990
%I 
%X The chemisorption energy of hydrogen on ZnO/Ni composite substrate is investigated using the Green function method and the complex-energy-plane integration approach. The tight-binding approximation is employed to model the semiconductor ZnO by a finite chain of alternating s- and p-orbitals, while the semi-infinite metal Ni is represented by a linear chain of d-orbitals. The impurity effect on the chemisorption energy is evaluated. The calculation shows that: (1) the chemisorption energy is a monotonously decreasing function of the ZnO thickness; (2) the presence of impurities Cu and Pt (Co and W) can weaken (strengthen) the chemisorption process and (3) the impurity effects are most significant when the impurity is closest to the nickel surface.
%K 杂质
%K 催化剂
%K 化学吸附
%K 担载式
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=CD48A232D1EB0FFA7D4B59F76104E660&yid=8D39DA2CB9F38FD0&vid=7C3A4C1EE6A45749&iid=59906B3B2830C2C5&sid=E6A891D2134F30C0&eid=DE9F9A03FB2549EC&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=1