结合合金和兴奋剂策略,以改善和稳定Pd基催化剂,以促进酸演变
Ligang Chen1, Yazhou Zhang2, Donghui Sui3
1State Power Investment Corporation Hydrogen Energy Company, Limited, Beijing, 102209, China.
Nanoscale
|September 19, 2025
概括
本研究介绍了Ni-doped Pd4S空心纳米粒子 (Ni-Pd4S HNPs) 作为进化反应 (HER) 的先进电催化剂. 这些新材料表现出增强的活性和耐用性,性能优于传统的催化剂.
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
- 催化剂是一种催化剂.
背景情况:
- 由于其特性, (Pd) 是进化反应 (HER) 的有前途的电催化剂,但在活性和耐用性方面面临挑战.
- 现有的基于Pd的材料由于强吸附和PdHx形成的耐久性不足,表现出低于最佳的HER活性.
研究的目的:
- 为了提高演化反应 (HER) 活性和基于的电催化剂的耐用性.
- 通过合并合金和兴奋剂战略开发基于Pd的新型材料.
主要方法:
- Ni-doped Pd4S空心纳米粒子 (Ni-Pd4S HNPs) 的合成.
- HER性能的电化学表征,包括超电位和电流密度.
- 通过稳定性测试评估催化剂的耐用性.
- 密度函数理论 (DFT) 计算以阐明性能提升的机制.
主要成果:
- Ni-Pd4S HNPs在10 mA cm-2的电流密度下实现了51 mV的低超电位,超过了现有的基于Pd的纳米材料.
- 与商业Pd/C和Pt/C相比,合成的电催化剂显示出更高的HER稳定性.
- DFT的计算显示,Ni和S合金修改了Pd活性位点的电子结构,优化了吸附.
结论:
- 合金和兴奋剂的联合策略有效地提高了基于Pd的电催化剂的HER活性和耐用性.
- Ni-Pd4S HNP代表了高效和稳定的演化反应的非常有前途的材料.
- 电子结构的修改是实现吸附接近零的吉布斯自由能量的关键.
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