Reaction of H_2 and CH_3OH with YBa_2Cu_3O_7 and related compounds

摘要

The oxygen content of YBa_2Cu_3O_7, (LaSr)_8Cu_8O_(20), La_4BaCu_5O_(13), La_2Sr_6Cu_8O_(16) and La_2CuO_4 is reduced by hydrogen in different steps to metastable reaction products at 160-450 deg C and the stable decomposition product of metallic Cu and different oxides above 420-730 deg C. Similar reactions were also observed for CH_3OH, which reacts catalytically above approx= 200 deg C. The behaviour of CH_4 is similar to an inert gas below approx= 450 deg C.