:We report on the electrocatalytic reduction of hydrogen peroxide at nanoporous gold (NPG) surfaces. Various NPG surfaces with different surface structure were prepared by changing the conditions of electrodeposition for Ag-Au layers such as the concentration ratios of KAu(CN) 2 over KAg(CN) 2 and deposition charges. The effects of different electrochemical conditions on the electrocatalysis of H 2 O 2 reduction were investigated. The NPG surfaces exhibited sensitive amperometric responses for H 2 O 2 reduction, from which calibration plots with higher sensitivity than a bare Au surface were obtained.
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