期刊論文
| 學年 | 110 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2022-03-23 |
| 作品名稱 | Modulating the electronic structure of zinc single atom catalyst by P/N coordination and Co2P supports for efficient oxygen reduction in Zn-Air battery |
| 作品名稱（其他語言） | |
| 著者 | Chuang, Cheng-hao |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Chemical Engineering Journal 440, 135928 |
| 摘要 | Single-atom catalysts have emerged as effective active species for electrocatalysis because of their appropriate structural and electronic properties. However, the weight percentage of single metal atoms are generally below 5 wt% in the catalysts, limiting the population of catalytic sites and their performance. In this work, we synthesized Zn single atoms with a configuration of ZnN3P in the carbon framework. With the Co2P particles as supports (ZnCo-PNC), the generic Zn single atom catalysts with a content of only 2 wt% showed a half-wave potential of 0.91 V for oxygen reduction reaction in alkaline medium. This value is higher than that for pure P doped Zn and Co based catalysts (Zn-PNC of 0.69 V, Co-PNC of 0.82 V), and even better than commercial Pt/C (0.87 V). DFT results demonstrated that the synergistic promotion of Co2P supports and N/P coordination could reduce the energy barrier to proceed ORR on Zn single atoms from 1.85 to 0.79 eV. By using it as the cathode catalyst for zinc-air battery application, it shows respectable performance in terms of maximum peak power (237.3 mW cm−2) and energy densities (847 W h kg−1). The current strategy may open new horizons to design high performance single atom catalysts by using suitable supports and coordination environment to tune their activity. |
| 關鍵字 | Single metal atom;Dual coordination;Synergistic effect;Oxygen reduction reaction;Zinc-air battery |
| 語言 | en_US |
| ISSN | 1873-3212 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/124194 ) |