Subhashish Dey
Abstract
Carbon Monoxide has been termed as “the unnoticed poison of the 21st century” and is often called “the silent killer”, because it gives no clear warning to its victims. Inhaling even relatively small amounts of CO can lead to hypoxic injury, neurological damage and even death. It not only affects human beings but also vegetation and indirectly increases the global warming. However, the endogenously produced CO is known to play a major role in the cytoprotection against damage of body tissues. Thus, the oxidation of poisonous CO to nonpoisonous CO2 at ambient conditions is crucial for life preservation in many applications, e.g. fire fighting, submarines, mining industries, space travel, smoking, as well as protecting the vegetation and environment. Further, low temperature CO oxidation is vital in lowest emissions during the cold start of an internal combustion engine. Preferential oxidation of CO in H2 rich stream at low temperature is also significant for the effective operation of fuel cells. A variety of CO oxidation catalysts are investigated in this era, but maximum of them have problems associated with the deactivation in presence of moisture, cost effective, lower stability and availability in the world. These accelerate the investigation of CO oxidation over platinum group metal (PGM) free catalysts. It has been concluded that moisture-endorsed Au based catalysts are best alternative to PGM catalysts for CO oxidation. Although there is numerous research articles present on this topic but until now no one review are present for this demanding issue. So there is a space in this area, it has been made an attempt to seal this hole by this review.
Keywords
CO oxidation; Catalyst; Ambient conditions; Parameters and Applications
