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28. The configuration of Auδ+-ZrO2δ− species induced activation enhances electrocatalytic CO2 to formate conversion.

Author

Jia, Yongjian, Zhang, Yadi, Lin, Mengque, Cheng, Yangyang, and Xu, Yanjie

Subjects
CHEMICAL recycling, CHEMICAL processes, STANDARD hydrogen electrode, CHEMICAL energy, GREENHOUSE effect, ELECTROLYTIC reduction
Abstract

Electrochemical CO2 conversion into value-added chemicals is a promising technology to solve the greenhouse effect and recycle chemical energy. However, the electrochemical CO2 reduction reaction (e-CO2RR) is seriously compromised by weak CO2 adsorption and a rough CO2 activation process based on the chemical inertness of the CO2 molecule and the formed fragile metal–C/O bond. In this paper, we designed and fabricated Au particles embedded in ZrO2. The configuration of Au particles being of positive charge and ZrO2 with negative charge is induced and generated by metal–support interactions (MSIs). As a result, Au/ZrO2@C presents a big difference in the CO2 conversion compared with the known work, affording a formate yield of 112.5 µmol·cm−2·h−1 at −1.1 V vs. reversible hydrogen electrode (RHE), and a max formate Faradaic efficiency of up to 94.1% at −0.9 V vs. RHE. This superior performance was attributed to the activated Au–ZrO2 interface to form the Auδ+ species. Both in-situ Fourier transform infrared (FTIR) spectroscopy and theoretical calculations show that the MSIs configuration can be inclined to the *OCO intermediate generation on Auδ+ species activating CO2 molecules and then accelerate the formation of the *OCHO intermediate in e-CO2RR, thereby favoring the CO2 conversion to formate. [ABSTRACT FROM AUTHOR]

Published
2024
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42. Assessment of the effects of myopic and hyperopic anisometropia on choroidal vascular structure in children using SS‐OCTA.

Author

Cao, Yiwen, Gu, Xiaopeng, Zhang, Yadi, Zhao, Jingjing, and Zhu, Dehai

Abstract

Objective: To compare large‐ and medium‐sized choroidal vascularity and the choriocapillaris (CC) flow area in children with different refractive errors using swept‐source optical coherence tomography angiography (SS‐OCTA). Methods: Forty‐two anisometropic children were enrolled and divided into hyperopic anisometropia (HA) and myopic anisometropia (MA) groups. SS‐OCTA was performed to analyse choroidal vascularity. Mean choroidal thickness (CT), choroidal vascularity volume (CVV), choroidal vascularity index (CVI) and CC flow area were compared between the two eyes. The inter‐ocular differences between the two groups were also determined. Results: Mean CT and CVV were highest in eyes with shorter axial lengths in both refractive groups, and the difference between the two eyes was positively correlated with the difference in axial length at the foveal region. Significant differences in the CVI in the MA group were only found in the parafoveal region. Inter‐ocular differences in the CC were significantly reduced in eyes with longer axial lengths in the foveal and parafoveal regions of the HA and MA groups, respectively. Comparing inter‐ocular differences, CC was significantly greater in the parafoveal region of the MA group than the HA group. Conclusions: All layers of choroidal vasculature were thinner in eyes with longer axial lengths in all groups. The inter‐ocular CC difference was greater in the MA than in the HA group, with similar differences in axial length. This suggests that both medium‐to‐large choroidal vascular and choroidal capillaries may play a role in myopia development. [ABSTRACT FROM AUTHOR]

Published
2024
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