Abstract
A NOVEL NANOPOROUS gold material prepared by removing silver from a gold-silver alloy selectively catalyzes production of an industrially important compound under mild conditions, according to a team of researchers in Germany and the U.S. ( Science 2010, 327, 319). The study further broadens gold’s rapidly growing repertoire of catalytic reactions. It also could help efforts to replace industrial chemical processes with less hazardous and “greener” ones. In just the past few years, gold’s reputation as an inert noncatalytic metal has undergone a complete makeover, as several research groups have found a number of reactions—including various types of oxidations—that are catalyzed by gold in nanostructured form. Nonetheless, commercial applications have been impeded by gold’s slowness to dissociate oxygen—a key step in oxidations—and the tendency of nanoparticles to agglomerate under typical reaction conditions. That process quickly shortens the lifetimes of supported catalysts such as gold, which is usuall...
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