A portable limiting current solid-state electrochemical diffusion hole type hydrogen sensor device for biomass fuel reactors: Engineering aspect

Monitoring hydrogen production from renewable biomasses suffers from the presence of CO or CO2CO2, even in the amount of traces. Catalytic electrode poisoning is one of the most serious issues when noble metals are involved. We report the engineering of a polymer based sensor device working under limiting current conditions by using the diffusion hole amperometric detection principle. The amount of hydrogen is determined by separating the hydrogen through a Pd barrier and freezing out the CO and CO2CO2. Four different designs were fabricated and studied under CO2CO2 containing H2H2 atmosphere up to 80∘C.