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https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/124308
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| Title: | Chemically coupling SnO2 quantum dots and MXene for efficient CO2 electroreduction to formate and Zn–CO2 battery |
| Authors: | Han, Lili;Peng, Xianyun;Wang, Hsiao-Tsu;Ou, Pengfei;Mi, Yuying;Pao, Chih-Wen;Zhou, Jigang;Wang, Jian;Liu, Xijun;Pong, Way-Faung;Song, Jun;Lin, Zhang;Luo, Jun;Xin, Huolin L. |
| Date: | 2022-09-13 |
| Issue Date: | 2023-07-28 12:05:12 (UTC+8) |
| Abstract: | Electrochemical conversion of CO2 into formate is a promising strategy for mitigating the energy and environmental crisis, but simultaneously achieving high selectivity and activity of electrocatalysts remains challenging. Here, we report low-dimensional SnO2 quantum dots chemically coupled with ultrathin Ti3C2Tx MXene nanosheets (SnO2/MXene) that boost the CO2 conversion. The coupling structure is well visualized and verified by high-resolution electron tomography together with nanoscale scanning transmission X-ray microscopy and ptychography imaging. The catalyst achieves a large partial current density of −57.8 mA cm−2 and high Faradaic efficiency of 94% for formate formation. Additionally, the SnO2/MXene cathode shows excellent Zn–CO2 battery performance, with a maximum power density of 4.28 mW cm−2, an open-circuit voltage of 0.83 V, and superior rechargeability of 60 h. In situ X-ray absorption spectroscopy analysis and first-principles calculations reveal that this remarkable performance is attributed to the unique and stable structure of the SnO2/MXene, which can significantly reduce the reaction energy of CO2 hydrogenation to formate by increasing the surface coverage of adsorbed hydrogen. |
| Relation: | Proceedings of the National Academy of Sciences 119(42), e2207326119 |
| DOI: | 10.1073/pnas.2207326119 |
| Appears in Collections: | [尖端材料科學學士學位學程] 期刊論文
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