期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 16, 期 23, 页码 3999-4005出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.202101069
关键词
carbon nitrides; triazole; porous materials; CO2 capture; CO2 reduction
资金
- Australian Research Council (ARC) [DE170101069, FT100100970, IH180100020]
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [2021R1C1C1008941]
- Australian Nuclear Science and Technology Organisation [AS172/SXR/1285]
- NSW Digital Grid Futures Institute, UNSW Sydney
- Australian Research Council [DE170101069] Funding Source: Australian Research Council
- National Research Foundation of Korea [2021R1C1C1008941] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study demonstrates that triazole-based C3N5 nanorods exhibit good performance in consecutive CO2 capture and conversion by tailoring pore size, basicity, and binding energy.
We investigated the CO2 adsorption and electrochemical conversion behavior of triazole-based C3N5 nanorods as a single matrix for consecutive CO2 capture and conversion. The pore size, basicity, and binding energy were tailored to identify critical factors for consecutive CO2 capture and conversion over carbon nitrides. Temperature-programmed desorption (TPD) analysis of CO2 demonstrates that triazole-based C3N5 shows higher basicity and stronger CO2 binding energy than g-C3N4. Triazole-based C3N5 nanorods with 6.1 nm mesopore channels exhibit better CO2 adsorption than nanorods with 3.5 and 5.4 nm mesopore channels. C3N5 nanorods with wider mesopore channels are effective in increasing the current density as an electrocatalyst during the CO2 reduction reaction. Triazole-based C3N5 nanorods with tailored pore sizes exhibit CO2 adsorption abilities of 5.6-9.1 mmol/g at 0 degrees C and 30 bar. Their Faraday efficiencies for reducing CO2 to CO are 14-38% at a potential of -0.8 V vs. RHE.
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