Nanoporous gold as non-enzymatic sensor for hydrogen peroxide |
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| Authors: | Fanhui Meng Xiuling Yan Jianguo Liu Jun Gu Zhigang Zou |
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| Affiliation: | aSchool of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;bSchool of Chemistry and Bioscience, Ili Normal University, Xinjiang 835000, China;cEco-materials and Renewable Energy Research Center, Department of Materials Science and Engineering, National Laboratory of Solid State Microstructures, Nanjing University, 22 Hankou Road, Nanjing 210093, Jiangsu Province, PR China |
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| Abstract: | Nanoporous gold (NPG) fabricated by dealloying Au–Ag film was investigated for the non-enzymatic detection of H2O2. The apparent activation energy of H2O2 electrochemical reduction on NPG was found to be as low as ∼30 kJ mol−1. The reduction currents at −0.4 V vs. SCE demonstrated a strict linear dependence in a wide H2O2 concentration region from 10 μM to 8 mM with a detection limit 3.26 μM. Furthermore, the biosensor based on NPG exhibited high selectivity, good reproducibility, and long-term stability. These results indicate that NPG could be a promising electrochemical material for H2O2 detection. |
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| Keywords: | Nanoporous gold Electrocatalysis H2O2 detection H2O2 sensor Dealloying |
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