Determination of Silver-Modified Titanium Phosphate Nanoparticles by Voltammetric and Electrocatalytic Methods

作者：Martin Yerga Daniel; Carrasco Rodriguez Javier; Begona Gonzalez Garcia Maria; Garcia Alonso Francisco Javier; Costa Garcia Agustin^*

来源：Electroanalysis, 2014, 26(12): 2574-2579.

DOI：10.1002/elan.201400519

• Nanoparticles
• Metal-based nanoparticles
• Electrocatalysis
• Catalysis
• Hydrogen evolution reaction

The electrochemical determination of silver-modified titanium phosphate nanoparticles (Ag-TiPNPs) was performed using two electrochemical features of this novel kind of nanoparticles. First, a determination using the voltammetric activity of the silver from the Ag-TiPNPs was carried out. Secondly, the electrocatalytic effect of Ag-TiPNPs was shown for the first time to the hydrogen evolution reaction (HER) and the determination of these nanoparticles was performed by chronoamperometry using this electrocatalysis. Moreover, it was verified that the catalytic effect was due to the electroreduced silver since the unmodified titanium phosphate nanoparticles (TiPNPs) did not exhibit this effect. Detection limits as low as 0.1 and 0.75 ng mu L-1 of Ag-TiPNPs were obtained with the voltammetric and chronoamperometric methods, respectively. 8-channel screen-printed electrochemical arrays (8xSPCEs) were employed as transducers to carry out these electrochemical studies, due to its low cost and time saving.

• 出版日期2014-12