2026-10-12T10:17:41Z https://www.scidb.cn/oai

10.57760/sciencedb.j00125.00260 2026-08-07T10:39:02Z

2026-08-07 Data for ''Janus Carbon Shells with Inner–Outer Functional Asymmetry Enable Local Proton Enrichment for Promoting CO2 Methanation'' doi:10.57760/sciencedb.j00125.00260 en Fig. 1 Schematic illustration of the synthesis of hollow carbon nanospheres (HCNs) and the fabrication of CoPc-based electrocatalysts for electrochemical CO2reduction (ECR).TEM images of (c) HCNs and (d) CoPc/HCNs. (e) Co K-edge XANES spectra of CoPc/HCNs and reference samples. (f) Corresponding Co K-edge EXAFS spectra. (g)Fig. 2 ECR performance of CoPc/HCNs electrodes.ECR performance of (c) CoPc/C@SiO2hybrid and (d) CoPc/HCNs hybrid at spray passes (catalyst loadings). (e) Po-tential-dependent ECR performance of the CoPc/HCNs hybrid. (f)Fig. 3 Electrocatalytic performance of HCNs and C@SiO2electrodes.(b) LSV curves of HCNs and C@SiO2electrodes under CO2atmosphere, showing exclusive hydrogen evolution reaction (HER) activity. (c) Electrochemical double-layer capacitance (Cdl) as a func- tion of scan rate for HCNs and C@SiO2electrodes, used to estimate the electrochemical surface area (ECSA). (d) Comparison of geometric current density andECSA-normalized current density (intrinsic activity) of HCNs and C@SiO2electrodes. (e-f).Fig.4 Mechanistic insights into CH4formation on CoPc/HCNs hybrid. (a) DFT-calculated adsorption free energies of H* for CoPc/HCNs and pristine carbon.(b) DFT-calculated adsorption free energies of key CO2reduction intermediates (*COOH and *CO) on CoPc/HCNs and pristine carbon. (c) CoPc; HCNs; ECR Tengyi Liu RESTRICTED dataset http://www.doi.org/10.1016/S1872-5805(26)61096-7 Science Data Bank