In situ detection of electrochemical reaction by weak measurement

Li, Zhangyan; Xu, Yang; Ma, Ke; Liu, Le; Xi, Jingyu; Guan, Tian; Li, Fuying; Zhou, Chongqi; Zhong, Suyi; He, Yonghong

doi:10.1364/oe.426345

Cited by 3 publications

(7 citation statements)

References 33 publications

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“…The changes in LI corresponding to the image collected by the surface refractive index sensor were calculated by deconvolution, and the obtained LSV curve is shown in Figure 4b. 33 The oxidation peak current looked similar to that obtained by the electrochemical workstation.…”

Section: ■ Experiments and Resultssupporting

confidence: 73%

“…The CV curves of different positions (A, B, and C) on the surface of the heterogeneous electrode are shown in Figure 5c. 33…”

Section: ■ Experiments and Resultsmentioning

confidence: 99%

“…The changes in LI corresponding to images collected by the surface refractive index sensor were calculated by deconvolution. The CV curves of different positions ( A , B , and C ) on the surface of the heterogeneous electrode are shown in Figure c . Note that Figure d–f represent the oxidation peak current density |ipa|, reduction peak current density |ipc|, and reduction peak current density, oxidation during CV of surface heterogeneous electrodes, and distribution of the ratio of peak current density |ipa/ipc|.…”

Section: Experiments and Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Imaging Sensor for the Detection of the Flow Battery Via Weak Value Amplification

Zhou

Shi

et al. 2021

Anal. Chem.

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Flow battery electrodes are vital for performing redox reactions, and an indepth understanding of reaction kinetics and spatial distribution differences in electrodes is very important for improving the efficiency of electrochemical reactions. In this study, a reflection-type phase-sensitive weak measurement imaging system was developed for the detection of flow batteries. The phase difference between two polarization components in total internal reflection caused by electrode redox processes was measured by weak value amplification. The resulting refractive index resolution of the imaging system was estimated to be 2.8−4.2 × 10 −6 RIU. The real-time monitoring ability of the system was demonstrated by linear sweep voltammetry tests of vanadium redox batteries. Compared to traditional optical methods, the proposed weak measurement imaging sensor did not require coating, as it can be used in acid electrolytes of vanadium flow batteries. Meanwhile, the weak value amplification effect led to a higher resolution than the total internal reflection system shown in our previous work, thereby resulting in more accurate detection of electrochemical reactions. In sum, the proposed sensor looks very promising for the detection of electrochemical reactions in flow batteries, water splitting, electrochemical corrosion, and electrocatalysis.

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Section: ■ Experiments and Resultssupporting

confidence: 73%

“…The CV curves of different positions (A, B, and C) on the surface of the heterogeneous electrode are shown in Figure 5c. 33…”

Section: ■ Experiments and Resultsmentioning

confidence: 99%

Section: Experiments and Resultsmentioning

confidence: 99%

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Imaging Sensor for the Detection of the Flow Battery Via Weak Value Amplification

Zhou

Shi

et al. 2021

Anal. Chem.

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“…Figure a shows the CV curves of the current and potential of different electrodes obtained by the EW. Figure b shows the CV curves between the relative current density and the potential obtained by the WM method, which will be converted to an absolute current density according to the calibration work . When the peak current and the peak absolute current density were extracted, the ratio of the two was the electrochemical RSA we need.…”

Section: Resultsmentioning

confidence: 99%

“…Also, i pa , i pc , and i(OE) in Figure 2c correspond to the result of the deconvolution of λ pa , λ pc , and λ(OE) in Figure 2b. For simplicity, the absolute current density with a physical unit had been obtained from the previous work through the calibration experiment, 19 which can avoid seeking the unknown diffusion coefficient. The calibration result is shown in Figure 2d.…”

Section: ■ Data Processingmentioning

confidence: 99%

In Situ Detection of Electrochemical Reaction Surface Area by Optical Weak Measurement

Zhou

et al. 2023

Anal. Chem.

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The surface area is key to electrochemical systems, including those in electrocatalysis and energy storage. Studies have shown that the surface area of the electrocatalyst directly affects the electrochemical activity, adsorption performance, and stability of the electrocatalyst. This paper used an optical weak measurement (WM) method, which has little impact on the analyte, to measure the reaction surface area (RSA) that actually participated in the electrochemical reaction. Then compared the RSA obtained by the WM with the total surface area (TSA) obtained by the standard Brunauer–Emmett–Teller (BET) measurement and the active surface area (ASA) obtained by the electrochemical double-layer capacitance (EDLC) method. Their growth trend was consistent, indicating the reliability of the WM method. Compared with the above two methods, the WM method is an in situ detection and easy to operate experimentally, which can help researchers to consider the effect of surface area on electrocatalyst performance more rationally.

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An ultrahigh conductivity and efficiency of SPEEK-based hybrid proton exchange membrane containing amphoteric GO-VIPS nanofillers for vanadium flow battery

Sheng

Wang

et al. 2023

Journal of Membrane Science

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In situ detection of electrochemical reaction by weak measurement

Cited by 3 publications

References 33 publications

Imaging Sensor for the Detection of the Flow Battery Via Weak Value Amplification

Imaging Sensor for the Detection of the Flow Battery Via Weak Value Amplification

In Situ Detection of Electrochemical Reaction Surface Area by Optical Weak Measurement

An ultrahigh conductivity and efficiency of SPEEK-based hybrid proton exchange membrane containing amphoteric GO-VIPS nanofillers for vanadium flow battery

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