초록
<P>In this paper, one-pot dextrin hydrolysis to glucose and the subsequent glucose hydrogenation to sorbitol is successfully conducted by using amyloglucosidase and Ru–B amorphous alloy highly dispersed onto the ordered mesoporous silica encapsulated by a porous silica shell. The porous outer silica shell prevents the larger amyloglucosidase and colloidal hydrolysis substances from contacting Ru–B, which avoids the poisoning effect on each other. Meanwhile, the small glucose can directly access the Ru–B cores through the pores within the silica shells, and the produced sorbitol can readily exit through these pores. Thus, both the amyloglucosidase-aided dextrin hydrolysis and the Ru–B-catalyzed glucose hydrogenation proceed efficiently in bulk solution and inside the chamber, respectively, leading to high sorbitol yield and strong durability. The catalyst design concept used in such a yolk-shell structured configuration opens a new avenue for the development of a highly efficient catalyst system for one-pot cascade reactions containing incompatible parameters.</P><P><B>Graphic Abstract</B><BR><IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/accacs/2014/accacs.2014.4.issue-1/cs400853u/production/images/medium/cs-2013-00853u_0016.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cs400853u'>ACS Electronic Supporting Info</A></P>