期刊論文
| 學年 | 113 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2025-07-26 |
| 作品名稱 | Regulating the electronic structure of tungsten carbide-induced Co(OH)2 for efficient water and urea electrolysis in hydrogen production from urea-containing water |
| 作品名稱（其他語言） | |
| 著者 | Ranjith Kumar Dharman; Pandian Mannu; Athibala Mariappan; Chung-Li Dong; Tae Hwan Oh |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Small Methods 9(9), e01189 |
| 摘要 | Urea oxidation reaction (UOR) is considered a capable method for simultaneously producing hydrogen and treating urea-rich wastewater. The development of well-designed, high-performance electrocatalysts is crucial for efficient urea oxidation. In this study, a tungsten carbide (WC) and Co(OH)2 nanocomposite (WC@Co(OH)2) is synthesized through a simple hydrothermal process for electrocatalytic UOR performance. X-ray absorption spectroscopy revealed that WC@Co(OH)2-2 exhibited higher levels of high-spin Co3+ electronic states compared to pristine Co(OH)2. The optimized WC@Co(OH)2 electrocatalysts showed remarkable activity in the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and UOR, with potentials of 0.152, 1.475, and 1.38 V, @ 10 mA cm−2, respectively. The WC@Co(OH)2-2 catalyst also exhibited a high turnover frequency of 31.2 s−1. Moreover, an overall urea electrolysis system constructed with the prepared WC@Co(OH)2, attained 1.55 V at 10 mA cm−2, which is 0.21 V lower than the potential required for overall water splitting. In situ Raman result revealed the quick reconstruction of WC1-x@Co(OH)2, where tungsten species infiltrate into CoOOH, forming a restored WC1-x@CoOOH layer that serves as the active species for water splitting. Furthermore, the WC@Co(OH)2-2 exhibited a high Faradaic efficiency of 92.18% and exceptional durability. This work broadens the UOR electrocatalyst and contributes the advancement of energy-efficient hydrogen production technologies. |
| 關鍵字 | Co(OH)2; electrocatalysts; overall water splitting; tungsten carbide; urea oxidation |
| 語言 | en |
| ISSN | 2366-9608 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 是 |
| 國別 | GBR |
| 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/987654321/129478 ) |