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Table 1 Catalytic performance of different catalystsa

From: Oxidation of 1-propanol to propionic acid with hydrogen peroxide catalysed by heteropolyoxometalates

Entry Catalyst Acid Strength /mV b Redox potential /V c Conversion /% Yield/% Selectivity/%
Propionic acid Propion-aldehyde Propyl propionate Others
1 9.36 3.87 41.35 52.56 6.09
2 (ProH)4[SiW12O40] 446 0.06 41.71 13.68 32.80 47.85 10.91 8.44
3 (ProH)3[PMo12O40] 427 0.11 30.82 18.31 59.41 29.88 6.72 3.99
4 (ProH)3[PW12O40] 474 0.24 73.98 45.50 61.50 32.51 4.08 1.91
5 (ProH)2[HPW12O40] 595 0.18 65.67 41.94 63.91 25.13 7.74 3.28
6 (ProH)[H2PW12O40] 653 0.13 57.94 27.19 46.93 31.48 17.24 4.35
7 (AspH)3[PW12O40] 490 0.19 69.99 40.53 57.91 25.29 6.97 9.83
8 (GluH)3[PW12O40] 574 0.15 63.54 35.71 56.20 34.56 7.69 1.54
9 H3PW12O40 732 0.13 64.53 36.05 55.87 28.17 13.23 2.73
  1. areaction conditions: n(1-propanol) = 10 mmol, n(catalyst) = 0.1 mmol, n(30%H2O2) = 30 mmol, T = 60 °C, t = 6 h, solvent free; b0.2 mmol, 25 mL acetonitrile; coxidation potential Vs Ag/AgCl
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