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A similar discrepancy between EPR and analytical data was found by others in non-stoichiometric V2O5-¦Ä ( d = 0.07 ) prepared by vacuum decomposition of AMV and explained with two consecutive reduction processes ( V5+¡úV4+¡úV3+ ) having two rate constants [9] .£¨Moreover , they found that non-stoichiometric and stoichiometric V2O5 ( obtained by heating V2O5-¦Ä in oxygen at 573K ) , submitted to reduction treatments with propylene , had the same dependence of the V4+ concentration detected by EPR vs. reductiontime . EPR:µç×Ó˳´Å¹²Õñ [ Last edited by ganguihua1983 on 2010-1-16 at 12:48 ] |
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ganguihua1983(½ð±Ò+10,VIP+0): 1-16 23:16
ganguihua1983(½ð±Ò+10,VIP+0): 1-16 23:16
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