在Pd3 Pb@Pt双功能电催化剂中进行应变和外厚度工程,用于乙醇升级,并与气生产相结合
Tong Li1, Qiuxia Wang1, Jingjing Wu2,3
1Institute for Energy Research, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
Small (Weinheim an der Bergstrasse, Germany)
|October 6, 2023
概括
这项研究开发了先进的- (Pd3Pb@Pt) 核心外纳米立方体作为双功能电催化剂. 这些催化剂在乙醇氧化 (EOR) 和演化 (HER) 反应中都表现出卓越的性能,使高效的电化学生产成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 乙醇氧化反应 (EOR) 为进化细胞中氧化反应 (OER) 提供了一个更有效的替代方案.
- 开发用于EOR和演化反应 (HER) 的高性能双功能电催化剂仍然是一个重大挑战.
研究的目的:
- 为了合成和描述Pd3Pb@Pt核心外纳米立方体,控制Pt外厚度.
- 评估这些新型催化剂的电催化性能,无论是EOR还是HER.
主要方法:
- 合成金属间Pd3Pb核的合成.
- 在Pd3Pb核心上控制Pt外沉积的Pt种子表轴生长.
- 对于EOR和HER活动的Pd3Pb@Pt纳米立方体的电化学表征.
- 组装和测试一个EOR/HER电解系统.
主要成果:
- 合成的Pd3Pb@Pt核心外纳米立方体由于拉伸应变和核心外结构之间的协同效应,表现出增强的催化活性.
- 具有3个Pt原子层的Pd3Pb@Pt实现了8.60A mg-1Pd+Pt的质量活性,以乙醇升级为乙酸,HER几乎具有100%的法拉第效率.
- 使用Pd3Pb@Pt的集成EOR/HER电解系统在10mA cm-2.2的电流密度下实现了0.75V的低电池电压.
结论:
- Pd3Pb@Pt核心外纳米催化剂对EOR和HER都表现出异常的双功能电催化活性.
- 这项工作为设计用于混合电催化应用的先进双功能催化剂提出了一个有前途的策略.
相关概念视频
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