Abstract
Raney copper catalysts promoted with zinc are known to catalyse both methanol synthesis and the water-gas shift reaction. In this work, samples were implanted with Zn + ions using a specially designed free-powder target holder, and then tested for water-gas shift activity in a chemical microreactor. Beneficial effects in the form of longer sustanined activity at higher conversion were observed, extending over several hundred hours, especially for the higher zinc doses. Similar results were obtained with a chromium implant. Control implants with inert gas ions produced no beneficial effects. This study represents the first example of the use of ion implanted promoters in catalysis, on a bench top reactor scale.
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