Abstract
Hydrogen peroxide (H2O2) is an important chemical widely used in industry. Recently, insulating zirconia‐supported Au nanoparticles (NPs) prepared by a modified deposition precipitation method (Au/ZrO2‐MDP) have been reported to show catalytic activity for H2O2 production from aerated HCOOH aqueous solution much higher than Au/n‐type semiconducting metal oxides (Au/n‐MOs) prepared by the normal deposition precipitation method. Here we report that Au/yttria‐stabilized zirconia (Au/YSZ‐MDP) exhibits catalytic activity for the reaction far exceeding those of Au/n‐MOs and even Au/ZrO2‐MDP. Au/YSZ‐MDP yields H2O2 from aerated 1.06 M HCOOH aqueous solution with an initial rate of 2.2 mmol h−1 gcat−1 and a turnover frequency (TOF) of 4.3 × 102 h−1 at 25oC. X‐ray photoelectron and photoluminescence spectral data, in addition to the effect of YSZ surface modification with aluminium oxide, indicate that the remarkable catalytic activity of Au/YSZ‐MDP is induced by oxygen vacancies (Ov) and Ov‐derived Zr‐OH groups on the YSZ surface in the vicinity of Au NPs.
Published Version
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