A PROCESS FOR PREPARATION OF BIMETALLIC PALLADIUM BASED NANOPOROUS ALLOY

摘要

Hydrogen is a promising source of energy in fuel cells, combustion motors, chemical reactors and an important starting material for many chemical reactions. Although very high power densities can be generated in fuel cells powered by pure hydrogen, traditionally produced hydrogen gas has disadvantages with regard to the cost for its generation, difficulty in storing and often contains carbon monoxide which is deleterious to the catalyst in fuel cells. So, development very good controlled hydrogen storage and release system can be used in fuel cells as. the potential alternative portable power sources. Given the difficulty in, storing the volatile hydrogen. gas, it is a particular objective to provide a process of preparing hydrogen gas in situ, in other words, instantly upon demand of a selected, hydrogen consuming device or process. Preferably, such a vehicle does not require a heavy and dangerous container for storage of hydrogen gas. Low molecular weight organic molecule like formic acid is capable of in situ hydrogen production upon demand from a hydrogen, consuming device via catalytic decomposition reaction. In this work, a new nanoporous Pd-Ag alloy catalyst (particle size 2 to 4 . nm) has been developed that generate CO-free hydrogen from formic acid at near ambient temperature with high efficiency. The produced hydrogen can be used in situ, at a desired high rate for feeding a hydrogen consuming device .or a hydrogen consuming process directly