相关实验视频

Updated: Jun 12, 2025

Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors

Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors

Published on: November 22, 2016

的单原子组合稳定在Mn替代的氧化物上,用于持久的酸性水电解

Ashwani Kumar¹, Marcos Gil-Sepulcre², Jinsun Lee¹

¹Max-Planck-Institut für Kohlenforschung, 45470, Mülheim an der Ruhr, Germany.

Advanced materials (Deerfield Beach, Fla.)

|September 25, 2024

概括

研究人员在替代的氧化物上开发了的新型单原子组合,用于酸性水的电解. 这种催化剂显示了提高生产的耐用性和活性,克服了以前单原子催化剂的局限性.

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
催化剂是一种催化剂.

背景情况:

酸氧演化反应 (OER) 对于通过水电解产生至关重要.
单原子催化剂 (SAC) 提供高效率,但由于金属漏和结构降解,在酸性OER中耐用性较差.
现有的基于Ir/Ru的氧化物在恶劣的酸性条件下也面临着稳定性挑战.

研究的目的:

为酸性OER开发一种高耐用性和活性单原子催化剂.
研究一种稳定单个原子和防止降解的策略.
了解增强稳定性和活动背后的机制.

主要方法:

制造短距离的Ir单原子组合 (Ir_SAE) 在Mn替代的旋Co₃O₄ (Ir_SAE-CMO) 上.
对酸性OER进行电化学测试,包括质量活动和耐久性评估.
第一个原则的计算来研究Ir迁移和表面相互作用.
现场表征,操作式X射线吸收,拉曼光谱和pH依赖性测试.

主要成果:

与基准IrO2和Ir SAC相比,Ir_SAE-CMO在原始Co₃O₄上显著改善了质量活动和耐久性.
替代降低了Ir迁移能量屏障,促进了稳定的Ir_SAE的形成.
刚性的Ir_SAE结构抑制了晶格氧气参与,并促进了直接的O−O基结合,提高了稳定性.

结论:

Ir_SAE-CMO催化剂为稳定和高效的酸性OER提供了一个有希望的解决方案.
将单个原子稳定成短距离组合是缓解降解的有效策略.
这些发现为使用先进的催化剂开辟了成本效益高的生产的道路.

关键词:

酸性水氧化的酸性水氧化.生产的生产的生产.氧化物路径机制的机制一个原子组合的组合.水的分裂是水的分裂.

更多相关视频

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

Published on: February 11, 2016

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

相关概念视频

Formation of Complex Ions

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...

Electrolysis

Electrolysis

In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...

Ion Exchange

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...