用诱导激活铁烯,以实现高效的酸性整体水电解
Ziqiang Wang1, Xinmiao Li1, Hugang Zhang1
1State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China. hjw@zjut.edu.cn.
概括
我们开发了一种富含缺陷,添加的金属 (P-Ir金属) 催化剂. 这种先进的材料有效地催化和氧的进化反应,用于增强的水分裂应用.
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:
- 基于贵金属的催化剂对于水的分裂至关重要.
- 开发高效且具有成本效益的催化剂仍然是一个挑战.
研究的目的:
- 为了合成和表征一种新的添加的金 (P-Ir金属) 催化剂.
- 评估P-Ir金属对演化反应 (HER),氧演化反应 (OER) 和整体水分裂的电催化性能.
主要方法:
- 有大量缺陷的P-Ir金属的合成.
- 电化学表征包括HER和OER在10 mA cm-2在0.5 M H2SO4的超电位测量.
- 评估整体水分性能,确定在10 mA cm-2生产气所需的操作电压.
主要成果:
- 皮尔金属对HER和OER表现出高的双功能活性.
- 需要的超电位为HER的28mV和OER的279mV,在10mA cm-2时.
- 实现了高效的整体水分离,低操作电压为1.508V,用于在10mA cm-2的气生产.
结论:
- 将纳入像这样的贵金属中显著提高了电催化性能.
- 铁显示出作为水分裂的高度活性和稳定的催化剂的巨大潜力.
- 这项工作为设计用于清洁能源应用的先进电催化剂提供了一个有希望的策略.
相关概念视频
Factors Affecting Solubility
33.5K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
33.5K
The Phosphorus Cycle
37.5K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
37.5K
Extraction: Advanced Methods
485
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
485
Ions as Acids and Bases
23.8K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
23.8K
Introduction to Electrolytes
10.3K
In humans, electrolytes play a vital role in various physiological processes. Balancing electrolyte levels is essential for normal body functions; their imbalance can be life-threatening. The major electrolytes include sodium, potassium, chloride, calcium, phosphate, and bicarbonate. They are primarily involved in physiological processes, such as nerve signal transmission, membrane trafficking, muscle contraction, buffering body fluids, and balancing water levels in the body.
Role of Sodium
One...
Role of Sodium
One...
10.3K
Electrolysis
26.7K
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...
26.7K


