1) Methods to enlarge the effective surface area microscopically and macroscopically were studied and the results were confirmed.

2) Superior start up performance and stability in the DSS mode were confirmed on a lk\V class module with an internal humidifier when pure hydrogen was used as fuel.

3) The influence of CO poisoning was studied using a pulse elcctrolyzing method.

4) A hydrogen recovery subsystem of laboratory size was demonstrated.

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