Formic Acid Electrooxidation by a Platinum Nanotubule Array Electrode
Figure 1
Overview of the template wetting nanofabrication process for making a platinum nanotubule array. (a) A porous alumina template is wetted with a solution of Pt(acac)2 and PDLLA in chloroform. (b) After evaporation of the solvent, a solid Pt(acac)2/PDLLA coating remains on the pore walls of the template. (c) A helium plasma etch is used to remove excess material on the outer surfaces, after which samples are annealed in air to reduce the Pt(acac)2 to Pt0 as well as to oxidize and remove the PDLLA. (d) The resulting Pt nanotubes were partially released by selectively etching the alumina template in 25 wt.% KOH(aq) for 2 min.
