通过微波还原对Co(OH)2进行连续的Ni-Pt装饰,以实现高效的性气演化
Luan Liu1, Hongru Liu1, Zikang Chen1
1Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China.
Nanomaterials (Basel, Switzerland)
|December 24, 2025
概括
一种新的微波方法创造了性演化 (HER) 的Ni-Pt@Co(OH) 2催化剂. 这种催化剂表现出卓越的性能和耐用性,使用比传统催化剂少的金.
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:
- 在可再生能源技术方面,开发用于性演化的高效电催化剂 (HER) 是至关重要的.
- 基于白金的催化剂是高效但昂贵的,需要减少白金使用的策略.
- 氧化 (Co(OH) 2) 作为一种潜在的支材料,但其对HER的催化活性需要增强.
研究的目的:
- 开发一种快速的,无溶剂的微波辅助策略,用于制造 (Pt) 和 (Ni) 修饰的CO (OH) 2催化剂.
- 研究这些性HER的改性催化剂的结构和电化学特性.
- 为了评估最有希望的催化剂Ni-Pt@Co(OH) 2的性能和稳定性,用于高效的生产.
主要方法:
- 无溶剂微波辅助合成用于催化剂制备.
- 使用像X射线衍射 (XRD) 和传输电子显微镜 (TEM) 等技术进行结构性表征.
- 感应合等离子体质谱 (ICP-MS) 用于元素分析.
- 电化学测量,包括线性扫描电压测量 (LSV) 和电化学阻抗光谱 (EIS),以1.0 M KOH.
- 加速降解试验 (CV循环) 和长期连续运行试验.
主要成果:
- 通过连续的Ni-then-Pt加载制备的Ni-Pt@Co(OH) 2催化剂表现出卓越的性能.
- 结构分析显示,与Pt@Co(OH) 2. 2相比,具有主导性Pt(111) 面的均Pt分散和显著降低的Pt负荷.
- 电化学测试显示,在10mA·cm-2时,超电位为71mV,相当于商业Pt/C,质量活动高4至6.5倍.
- 观察到较低的电荷转移阻力和优良的稳定性,在3000个CV循环和11小时的运行后,降解是可以忽略的.
结论:
- Ni-Pt@Co(OH) 2催化剂对性HER表现出卓越的活性和稳定性,这归因于增强的Pt利用率,丰富的导电位点和Ni-Pt界面协同作用.
- 这项工作为开发高效的HER电催化剂提供了一种有希望的,具有成本效益的方法,其金消耗最小化.
- 开发的微波辅助策略为先进的催化剂制造提供了快速和可持续的途径.
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