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Fig. 1. The calculated work functions (Wf) of G, BN, and Gdefect models (a-b). (c) Schematic of the Gdefect/BN computational model with electron transfer. Comparison of H2O2 generation performance on different catalyst structures: (d) G, BN, and G/BN, (e) Gdefect, (f) Gdefect/BN.
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Fig. 2. The TEM images of G (a) and GBN (b) catalysts, corresponding EDS-Mapping (e-j) images. ((c) and (d) are locally enlarged images of the G segment and the BN segment, respectively)
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Fig. 3. CV curves (a) and Tafel plots (b) of G, BN, and GBN cathodes. The RRDE curves (a) of G, BN, and GBN catalysts at 1600 rpm under 10 mV s?1, RRDE-corresponding (b) H2O2 selectivity and (c) electron transfer number (n). (d) The H2O2 concentration on G, BN, and GBN cathode at 0.05 M O2-saturated Na2SO4 solution.
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Fig. 4. Spin-trapping ESR spectra of (a) DMPO-HO?, (b) DMPO-O2??, and (c) TEMP-1O2 on G, BN, and GBN three catalytic cathodes system. The corresponding curves of (d) HO?, (e) O2??, and (f) 1O2 concentration change over G, BN, and GBN three electrode systems.
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Fig. 5. The SMX removal of catalytic cathode prepared at 800 ¡ãC: removal effect of G, BN, and GBN cathode (a) and corresponding kapp comparison (b). TOC removal (c) of SMX in different catalytic cathode systems. (d) The SMX removal within GBN electrode in different reaction processes (The applied current were 0.12 mA and 12 mA for electro-adsorption and electrocatalysis processes, respectively). (e) Spin-trapping ESR spectra of TEMP-1O2 on GBN catalytic system. The ROS contributions (f) for SMX removal in GBN cathode system.
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±¸×¢£ºPermissions for reuse of all Figures have been obtained from the original publisher. Copyright 2024, Elsevier Inc
²Î¿¼ÎÄÏ×£ºPeng Yiyin, Xiao Wenyu, Wang Hui, Bian Zhaoyong, Carbon defect induced electron transfer promotes electrocatalytic activation of molecular oxygen to selectively generate singlet oxygen for pollutants removal, Applied Catalysis B: Environment and Energy, 2024, 124820.
ÎÄÕÂÁ´½Ó: https://www.sciencedirect.com/science/article/pii/S0926337324011342
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