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We report on the synthesis of novel three-dimensional nanoporous Pt–Ru bimetallic networks by decorating nanoporous Pt networks with Ru using a hydrothermally assisted precipitating process. Scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) were used to characterize the morphology and the composition of the nanoporous Pt–Ru networks formed. X-ray diffraction analysis confirmed that, after protected annealing treatment, Pt–Ru bimetallic material was formed. The electrocatalytic activity of the synthesized nanoporous Pt–Ru networks was characterized using electrochemical oxidation of methanol as a probe. The electrocatalytic activity of the nanoporous Pt networks significantly increases with the increments of decorated Ru and reaches the highest value with 41% of Ru. The peak current of methanol oxidation on the nanoporous Pt–Ru(41%) bimetallic networks is over 180% higher than that on the nanoporous Pt networks without Ru decoration. This is very desirable for fuel cell development and electrochemical sensor design.
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Peng et al. (2007) studied this question.
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