Electrochemical generation of arsine

The use of arsine gas (ASH3) is essential in several applications in the electronics industry. Arsine is an extremely toxic material and stringent safety requirements are needed in its storage and use. These concerns have promoted the use of on-site, on-demand supply of arsine to eliminate the need for storage. One recently developed method [105] is based on the electrochemical reduction of arsenic to arsine  

The generation of arsine in alkaline solution (1 mol dm NaOH) from high purity (99.999%) arsenic cathodes can be carried out with current efficiencies in the range of 95-97%. The only other product is hydrogen gas. This can be achieved over two orders of magnitude of current density and thus the production of high arsine gas concentrations made the process development of an on-demand electrochemical generator possible. 

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