通过基板效应对性气进化的化的双活性站点工程
Pengyan Wang1, Zubing Huang1, Chengmei Ding1
1School of Energy and Electrical Engineering, Qinghai University, Xining, 810016, P. R. China.
ChemSusChem
|August 4, 2025
概括
研究人员使用NiSe2/NiS2-NiS电极开发了一种性演化反应 (HER) 的新催化剂. 这种双重活跃地点策略显著提高了用于高效生产的催化性能.
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
- 催化剂是一种催化剂.
背景情况:
- 性演化反应 (HER) 的有效催化剂需要优化水/吸附/解离动力学.
- 在单一化合物中同时激活阳离子和阴离子位点仍然是降低能量障碍的挑战.
研究的目的:
- 开发一种异质基质监管策略,用于在NiSe2中构建增强HER的双活性位点.
- 为了研究基质对催化性能的影响,并了解双重活性位点的机制.
主要方法:
- 使用异质基质 (NiS2-NiS) 调节策略制造NiSe2/NiS2-NiS电极.
- 电化学测试用于评估性条件下的催化性能.
- 密度函数理论 (DFT) 计算和现场拉曼光谱分析电子结构和活性位点.
主要成果:
- NiSe2/NiS2-NiS电极表现出极好的 HER 催化性能,在 10 mA cm-2.2 时具有 46 mV 的超电位.
- DFT计算显示,NiS2-NiS基质诱导电荷分布并激活Ni3d电子.
- 现场拉曼光谱证实了Ni和Se原子是双活性位点,具有最小化的水吸附-解离能障碍和最佳的吸附吉布斯自由能量.
结论:
- 不同质基质策略有效地设计了NiSe2中的双活性位点,以获得高效的性HER.
- 该研究通过利用基质效应来优化吸附-解离动力学和吸附,提供了对催化剂设计的见解.
- 这种方法为开发用于生产的先进电催化剂提供了一条新的途径.
更多相关视频
06:32A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
19.7K
09:18Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
Published on: June 21, 2017
11.5K
相关概念视频
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.4K
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...
3.4K
Catalysis
27.6K
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.
27.6K
Reduction of Alkenes: Catalytic Hydrogenation
12.6K
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...
12.6K
