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Pure hydrogen can be chemically stored and supplied directly to PEFC via the redox of modified fumed-Fe-dust obtained from steel company: storage of H2:Fe3O4+4H2→3Fe+4H2O or Fe2O3(initialstate)+3H2→2Fe+3H2O; recovery of H2:3Fe+4H2O→Fe3O4+4H2. Modified fumed-Fe-dust with various metal additives has been prepared by impregnating metal cations of Cr, Al, Zr, Mo, Mo–Al, Mo–Ti, Mo–Zr, Mo–Ce, Mo–Rh, Mo–Ni...
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