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http://hdl.handle.net/10397/106721
Title: | Red blood cell (RBC)-like Ni@N–C composites for efficient electrochemical CO₂ reduction and Zn–CO₂ batteries | Authors: | Han, L Wang, CW Xu, HP Yang, M Li, B Liu, M |
Issue Date: | Apr-2024 | Source: | Journal of materials chemistry A, 28 Apr. 2024, v. 12, no. 16, p. 9462-9468 | Abstract: | The development of highly active and selective electrocatalysts for the reduction of CO2 into valuable products presents a promising avenue for addressing the energy crisis and mitigating the greenhouse effect. In this study, we introduce a ligand-assisted supermolecule-derived red blood cell (RBC)-like catalyst composed of nickel and nitrogen-doped carbon (Ni@NC) for electrocatalytic carbon dioxide reduction reaction (eCO2RR) and Zn–CO2 battery applications. Among the various samples prepared, Ni@NC-950 exhibited the highest activity and demonstrated a faradaic efficiency of CO (FECO) greater than 90% across a wide potential range from −0.6 to −1.0 V [vs. reversible hydrogen electrode (RHE)], with a peak FECO of 97.8% achieved at −0.8 V. This translated to a remarkable partial current density (jCO) of 22.5 mA cm−2. When employed as the cathode catalyst in a Zn–CO2 battery, the Ni@NC-950 catalyst delivered a peak power density of 2.36 mW cm−2 at a current density of 10.97 mA cm−2. Importantly, the battery exhibited robust long-term discharge capability, operating continuously and steadily at 5 mA cm−2 for 20 hours. | Publisher: | Royal Society of Chemistry | Journal: | Journal of materials chemistry A | ISSN: | 2050-7488 | EISSN: | 2050-7496 | DOI: | 10.1039/D3TA08049H |
Appears in Collections: | Journal/Magazine Article |
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