解读格子在电催化自我重建中的作用,以促进性的进化
Xiao-Han Zhang1, Meng-Tian Zhang1, Hong-Gang Du1
1Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Materials, Jiangxi Normal University, Nanchang, 330022, China.
Angewandte Chemie (International ed. in English)
|June 17, 2025
概括
在化阴极中的兴奋剂显著增强了水的电解以生产. 这项研究揭示了如何修改催化剂.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 阴极重建对于水电解至关重要,但比阳极研究较少.
- 格子 (Se) 兴奋剂可以改善金属基电催化剂中的演化反应 (HER).
- 在活性物种和自重建过程中的催化动力学中,Se的确切作用尚不清楚.
研究的目的:
- 调查性HER期间Se-化化 (Se-CoP) 的加快两阶段结构演变.
- 阐明Se在自我重建的电催化剂中的基本作用,以提高HER的性能.
主要方法:
- 操作X射线吸收光谱 (XAS) 和粉末X射线衍射 (XRD).
- 高分辨率传输电子显微镜 (HRTEM).
- 密度函数理论 (DFT) 的计算.
主要成果:
- 在性HER条件下观察到Se-CoP的加速两阶段结构演变.
- 确定了与Se.装饰的Co(OH) 2和Co纳米集群的现场形成的双组分异构结构.
- 在100 mA·cm-2时达到79 ± 2 mV的低超电位,并具有高电荷传输能力.
结论:
- 重建的Se-CoP催化剂表现出卓越的HER性能,这是由于双组分异构结构和残留Se的协同效应.
- 这项工作为先进的复合电催化剂的异原子扰动自我重建提供了新的见解.
- 这些发现为设计高效的非贵金属化物电催化剂用于水电解铺平了道路.
更多相关视频
10:21Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
8.5K
06:32A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
19.8K
相关概念视频
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.4K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.4K
03:00Electrolysis
27.3K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
27.3K