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• W4319762893 endingPage "141657" @default.
• W4319762893 startingPage "141657" @default.
• W4319762893 abstract "Electrochemical oxygen reduction reaction (ORR) to hydrogen peroxide (H2O2) is a common method to address the growing demands of H2O2. To map a clear understanding of structure–activity relationship of electrocatalyst for H2O2 production, it is necessary to real-time quantitative monitor of H2O2 in the initial production process. However, we found that the common off-line methods such as spectrophotometry, titration, etc., are not reliably during in-situ ORR process. Here, a simple and real-time simultaneous electrochemical production and determination of H2O2 system is constructed by using a dual-functional nickel (Ni) single-atom electrocatalyst. The electro-production part is conducted with a DC power supply, air pump, and dual-electrode system, while the electro-detection part consists of a three-electrode system. Compared with traditional off-line H2O2 measure methods, the present on-line determination of H2O2 protocol provides more reliable results in the quantitative monitoring of H2O2, and with a wide detection concentration range from 20 pM to 22.2 mM and a low detection limit of 6.87 pM. NiOOH on single Ni site is an important intermediate for efficient detection of H2O2 in alkaline medium. The Ni-SAC sensor also shows well anti-interferential and selective ability, high reproducibility and stability of H2O2 sensing up to 12 days. This simple-to-operate method offers a new window to record a reliable structure–activity relationship on electrocatalyst engineering in electrochemistry." @default.
• W4319762893 created "2023-02-11" @default.
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• W4319762893 date "2023-03-01" @default.
• W4319762893 modified "2023-09-29" @default.
• W4319762893 title "In-situ monitoring of hydrogen peroxide production at nickel single-atom electrocatalyst" @default.
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• W4319762893 doi "https://doi.org/10.1016/j.cej.2023.141657" @default.
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