电子阴性调制的PtFeCoNiCu高合金催化剂,用于高效的HER和OER
Fan Wang1, Shuhui Chen1, Zhi Tong1
1National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China.
ACS applied materials & interfaces
|November 29, 2025
概括
高合金纳米粒子 (HEA NPs) 为进化 (HER) 和氧进化 (OER) 提供了增强的电催化. 这项研究合成了PtFeNiCoX HEA NP,证明了可持续生产的卓越性能和稳定性.
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:
- 高合金纳米粒子 (HEA NPs) 由于可调节的电子结构和协同效应,对电催化有很大的希望.
- 优化多金属催化剂的同时演化反应 (HER) 和氧演化反应 (OER) 是一个挑战.
研究的目的:
- 在碳化木材 (CW) 基板上使用短暂高温冲击方法 (THTS) 合成PtFeNiCoX HEA NP.
- 调查电子阴性差异对HEA NPs中HER和OER催化的影响.
- 开发一个具有成本效益和高效的电催化剂,用于可持续的生产.
主要方法:
- 通过THTS合成PtFeNiCoX (X:Cu,Mo,Mn) 和HEANP.
- 使用碳化木材 (CW) 作为自支的电极基板.
- 在性介质中对HER和OER性能进行电化学表征.
主要成果:
- 在HEANP中电子负性的差异诱导了电荷再分配,产生了高活性Cu和Pt位点.
- 这些地点有效地稳定了中间体,改善了水分离.
- PtNiCoFeCu HEA NPs表现出较低的超电位 (HER为10mV,OER为164mV) 和高稳定性.
- 通过使用HEA NPs作为阳极和阴极,在1.48 V的电压下实现了10 mA cm-2的整体水分离.
结论:
- THTS方法提供了一种成本效益高的途径来合成高效的HEA NP电催化剂.
- 电子负性驱动的设计是优化双 HER/OER 催化剂的可行策略.
- 这些HEA NP显示了通过水电解产生可持续的巨大潜力.
更多相关视频
相关概念视频
02:50Catalysis
30.0K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
30.0K
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.8K
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...
3.8K
02:13Reduction of Alkenes: Catalytic Hydrogenation
13.8K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
13.8K
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
8.9K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
8.9K