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| Atomically Engineered WOx/MoOx-Modified Defect-Rich Pd Metallene for Enhanced Alkaline Oxygen Reduction Electrocatalysis | |
| 2024-04-17 | |
| 状态 | 已发表 |
| 摘要 | Defect engineering is a key chemical tool to modulate the electronic structure and reactivity of nanostructured catalysts. Here, we report how engineering defects in a palladium metallene nanostructure results in a highly active catalyst for the alkaline oxygen reduction reaction (ORR). A defect-rich WOx and MoOx modified Pd metallene (denoted as D-Pd M) was synthesized by a facile wet-chemical method. Detailed structural analyses reveal the presence of three distinct atomic-scale defects, that is pores, concave surfaces, and surface-anchored individual WOx and MoOx sites. The presence of this combination of defects results in excellent catalytic ORR activity with a half -wave potential of 0.93 V vs. RHE and a mass activity of 1.3 A·mgPd-1 at 0.9 V vs. RHE, outperforming the commercial references Pt/C and Pd/C by factors of 6.5 and 3.9, respectively. The practical usage of the compound is demonstrated by integration into a custom-designed Zn-air battery. At notably low D-Pd M loading (26 μgPd·cm-2), the system achieves a high specific capacity (809 mAh·gZn-1) together with excellent discharge potential stability. In sum, this study provides a blueprint for the targeted introduction of distinct |
| 关键词 | Oxygen reduction reaction Metallene Defects Electrocatalysis Atomic WOx/MoOx modification |
| 语种 | 英语 |
| DOI | 10.26434/chemrxiv-2024-fkr00 |
| 相关网址 | 查看原文 |
| 出处 | chemRxiv |
| 收录类别 | PPRN.PPRN |
| WOS记录号 | PPRN:88536881 |
| WOS类目 | Chemistry, Multidisciplinary |
| 文献类型 | 预印本 |
| 条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/372904 |
| 专题 | 物质科学与技术学院 物质科学与技术学院_硕士生 物质科学与技术学院_PI研究组_曹克诚组 |
| 通讯作者 | Liu, Rongji; Li, Shujun; Streb, Carsten |
| 作者单位 | 1.Johannes Gutenberg Univ Mainz, Dept Chem, Duesbergweg 10-14, D-55131 Mainz, Germany 2.Ulm Univ, Inst Inorgan Chem1, Albert Einstein Allee 11, D-89081 Ulm, Germany 3.Henan Normal Univ, Sch Chem & Chem Engn, Henan Key Lab Boron Chem & Adv Mat, Xinxiang 453007, Peoples R China 4.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 5.Helmholtz Inst Ulm, Electrochem Energy Convers, Helmholtzstr 11, D-89081 Ulm, Germany |
| 推荐引用方式 GB/T 7714 | Zhao, Yupeng,Chen, Zhengfan,Ma, Nana,et al. Atomically Engineered WOx/MoOx-Modified Defect-Rich Pd Metallene for Enhanced Alkaline Oxygen Reduction Electrocatalysis. 2024. |
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