Wj. Li et al., Electrochemical behavior of heteropoly acid anions adsorbed in electrodes modified with mesoporous molecular sieve silica, J MAT SCI T, 17, 2001, pp. S131-S134
Heteropoly acid H4SiW12O48 (denoted as SiW12) was assembled with the mesopo
rous materials MCM-41 modified with 3-aminopropyltriethoxysilane (APTES) (d
enote MCM-41((m))). The electrochemical behavior of SiW12/MCM-41((m)) compl
exes-based electrode indicated SiW12 anion was adsorbed by MCM-41((m)). In
MCM-41((m)) electrode, large voltammetric waves, showing that the electrost
atic bound ions adsorbed in MCM-41((m)) were electrochemically active. The
potential application as amperometric sensors for nitrite is anticipated.