在灵活的碳纤维上固定的高热量单原子催化剂,用于增强双功能氧催化活性和稳定性
Zhe Lu1, Zhe Wang1, Qitong Ye2
1College of Textile and Clothing Engineering, National Engineering Laboratory for Modern Silk, Soochow University, Suzhou 215123, China.
ACS nano
|January 31, 2026
概括
集成纳米集群的高单原子催化剂 (HESAC) 在氧降解和进化反应中表现出卓越的性能. 这一突破为先进的储能和转换技术提供了一个强大的平台.
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:
- 高单原子催化剂 (HESAC) 对电催化有前景,但在结构控制和机械理解方面面临挑战.
- 精确设计的HESAC对于推进能源转换技术至关重要.
研究的目的:
- 设计和合成一种由碳纤维支持的新型多孔HESAC (ZnCoNiCuFe@PCF) 与集成的纳米集群.
- 研究多金属单个原子位点和纳米集群对电催化活性的协同效应.
- 阐明氧降解反应 (ORR) 和氧演化反应 (OER) 的反应机制.
主要方法:
- 在ZnCoNiCuFe@PCF催化剂的合成.
- 对ORR和OER进行电催化性能测试.
- 密度函数理论 (DFT) 计算以了解反应机制.
- 在空气电池 (ZAB) 中对催化剂的评估.
主要成果:
- 该ZnCoNiCuFe@PCF催化剂对ORR和OER表现出卓越的双功能活性,超过了基准催化剂.
- DFT的计算显示,催化剂结构促进了电荷再分配,并优化了中间吸附.
- 催化剂在ZAB.中显示出240.9mW cm−2的峰值功率密度和特殊的循环稳定性 (>2600小时).
结论:
- 开发的HESAC与协同高站点和纳米集群提供了设计先进电催化剂的新策略.
- 这项工作为HESAC设计提供了对高效储能和转换能源的基本见解.
- 催化剂显示了下一代能源技术 (如空气电池) 的巨大潜力.
相关概念视频
Catalysis
30.5K
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.
30.5K
Entropy
36.0K
Salt particles that have dissolved in water never spontaneously come back together in solution to reform solid particles. Moreover, a gas that has expanded in a vacuum remains dispersed and never spontaneously reassembles. The unidirectional nature of these phenomena is the result of a thermodynamic state function called entropy (S). Entropy is the measure of the extent to which the energy is dispersed throughout a system, or in other words, it is proportional to the degree of disorder of a...
36.0K
Entropy
3.6K
The first law of thermodynamics is quantitatively formulated via an equation relating the internal energy of a system, the heat exchanged by it, and the work done on it. A quantitative formulation of the second law of thermodynamics leads to defining a state function, the entropy.
When an ideal gas expands isothermally, the disorder in the gas increases. From the molecular perspective, the gas molecules have more volume to move around in.
Consider an infinitesimal step in the expansion, which...
When an ideal gas expands isothermally, the disorder in the gas increases. From the molecular perspective, the gas molecules have more volume to move around in.
Consider an infinitesimal step in the expansion, which...
3.6K
Standard Entropy Change for a Reaction
24.4K
Entropy is a state function, so the standard entropy change for a chemical reaction (ΔS°rxn) can be calculated from the difference in standard entropy between the products and the reactants.
24.4K
RNA Stability
35.7K
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
35.7K
Carbon Skeletons
115.0K
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
115.0K


