在单个p块原子中调节贝德电荷转移,用于增强氧降低电催化剂的多Pd金属
Linfeng Xie1, Jing Wang2, Kun Wang3
1State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Angewandte Chemie (International ed. in English)
|July 10, 2024
概括
将单原子p块金属引入 (Pd) 金属纳米片中,可以增强氧降解反应 (ORR). 木添加Pd金属具有卓越的ORR活性和空气电池性能,使其成为一个有前途的电催化剂.
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:
- 由于其独特的结构,金属纳米板是新兴的电催化剂.
- 优化电子相互作用是高效电催化剂的关键.
研究的目的:
- 调节Pd金属纳米片中的电荷转移,以提高氧降解反应 (ORR) 活性.
- 为了研究单原子p块金属兴奋剂对Pd金属电催化剂的影响.
主要方法:
- 合成的单原子p块金属 (In, Sn, Pb, Bi) 合Pd金属纳米片.
- 利用X射线吸收和光电子谱学来分析电子结构.
- 在性溶液中评估ORR的电催化性能.
- 测试了空气电池阴极中的材料.
- 进行理论计算以了解兴奋剂效应.
主要成果:
- 使用p-块金属的兴奋剂促进了电子转移到Pd位点,将d频段中心向下移动.
- 观察到氧气中间体的吸附能量减弱.
- 石添加的Pd金属烯显示出异常的ORR质量活性 (11.34A mgPd-1 在0.9V).
- 该Bi-Pd金属阴极在空气电池中实现了1.546V的开放电路电压和760小时的稳定运行.
- 理论计算证实了Bi doping优化了电荷转移和Pd-O键的长度.
结论:
- 对p块金属的单原子兴奋剂是一种有效的策略,用于增强ORR的Pd金属电催化剂.
- 双Pd金属是一种基于Pd的最先进的ORR电催化剂.
- 开发的材料显示了储能应用的巨大潜力,例如空气电池.
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