相关实验视频

Updated: Jun 21, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

设计矿点的内在特征和局部微环境,以实现高效的氧气还原反应

Haibin Wang¹, Chunlei Li¹, Mengling Liu¹

¹School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou, Gansu 730050, China.

Journal of colloid and interface science

|July 13, 2024

概括

优化 (Pt) 电催化剂的氧化减排包括修改结构和表面. 本研究引入了一种具有离子液体修饰的新型PtCo合金催化剂,提高了性能和稳定性,以实现高效的能量转换.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

优化 (Pt) 基电催化剂对于氧减少反应 (ORR) 是至关重要的.
目前的研究往往忽视了溶剂作用在相位接口的影响,而是专注于批量催化剂修改.
了解Pt位点上的中间吸附是提高ORR效率的关键.

研究的目的:

通过优化Pt表面相互作用来开发一种具有增强ORR性能的新型电催化剂.
研究内在催化剂结构和表面修饰与疏水离子离子液体 (ILs) 的协同效应.
提供关于抑制 Pt 站点上不必要的中间稳定性的见解.

主要方法:

电催化剂的制造,采用一个有序的PtCo合金,固定在 (Co) 单原子/集群装饰支 (Co_1,nNC) 上.
使用疏水性离子液体 (IL) 的表面优化.
实验研究和理论计算分析结构和表面特性.

主要成果:

开发的IL-PtCo/Co_1,nNC催化剂表现出优越的ORR性能,半波潜力 (E_1/2) 为0.916V与RHE相比,质活性 (MA) 为1350.3mA mg_Pt^-1.
压缩应力和局部疏水性协同抑制了Pt位点上的OH稳定.
催化剂表现出极好的稳定性,在E_1/2仅损失5mV,经过10,000个循环电压计 (CV) 循环后.

结论:

结合内在结构设计 (Co1,nNC上的有序PtCo合金) 与表面修饰 (疏水性IL) 是开发高性能电催化剂的有效策略.
压力应激和局部疏水性的协同效应显著增强ORR活动和稳定性.
这种方法为设计用于能源转换应用的高效电催化剂提供了新的途径.

关键词:

内在结构本质结构.离子液体是一种离子液体.当地疏水性地方疏水性氧降解反应是氧降解反应.金金是什么意思

更多相关视频

A Salt-Templated Synthesis Method for Porous Platinum-based Macrobeams and Macrotubes

A Salt-Templated Synthesis Method for Porous Platinum-based Macrobeams and Macrotubes

Published on: May 18, 2020

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation

Published on: April 11, 2014

相关概念视频

Peroxisomes and Mitochondria

Peroxisomes and Mitochondria

Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration—the process that converts energy from food into ATP. Peroxisomes carry out a variety of functions, primarily breaking down different substances, such as fatty acids.
The peroxisome is a single membrane-bound cellular organelle that can perform several different functions, including lipid metabolism and chemical detoxification. The enzymes within...

Electrodeposition

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...

The Supercomplexes in the Crista Membrane

The Supercomplexes in the Crista Membrane

The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...