Thermochemical Decomposition of Water Based on Reactions of Chromium and Barium Compounds

Science  29 Aug 1975:
Vol. 189, Issue 4204, pp. 715-716
DOI: 10.1126/science.189.4204.715


A potentially useful thermochemical cycle developed for the production of hydrogen and oxygen from water consists of three chemical reactions that take place in the temperature range from 400° to 1200° K. The oxidation and reduction of chromium compounds by barium hydroxide and the hydrolytic disproportionation of barium chromate(IV) and barium chromate(V), the reactions which constitute the proposed cycle, have been demonstrated.