以氨基酸为基础的铁复合体进行质子减少:在催化剂地点的质子残留度的影响
Srijit Sen1, Pankaj Kumar1, Santanu Pattanayak1
1Department of Chemistry, Rajiv Gandhi Education City, Ashoka University, Haryana, India.
Chemistry, an Asian journal
|November 9, 2025
概括
铁氨基酸复合体显示了pH取决于质子的减少. 引入质子穿通道使进化反应 (HER) 的效率提高了五倍,推进了可持续的能源解决方案.
科学领域:
- 催化剂是一种催化剂.
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 催化剂的微环境对于电催化质子减少至关重要,特别是在具有竞争性质子源的水性介质中.
- 自然酶利用蛋白质支架,如质子通道和疏水口袋来克服这些挑战.
- 铁氨基酸复合物被研究了它们在质子中继和穿机制中的作用.
研究的目的:
- 为了研究质子继电器和穿机制在用铁氨基酸复合体的水性质子减少中的作用.
- 评估质子穿通道对催化剂效率的影响.
- 了解铁希夫基复合物的pH依赖激活,用于演化反应 (HER) 催化.
主要方法:
- 铁氨基酸复合物的合成和表征 ([Fe(ONR) 2)) 具有不同的R组 (甘氨酸 (C1) 和酸 (C2)).
- 包含和评估具有和没有设计的质子通道的催化剂.
- 在水性缓冲溶液 (例如,MES) 中进行pH依赖的电化学研究.
主要成果:
- 复合体C1和C2表现出pH依赖的质子减小行为.
- 复合C2具有多个碳酸基,在pH 3的MES溶液中显示出最高的质子减少率.
- 对α-碳酸盐与铁中心的协调和pH值低于5.0的质子化激活了用于HER催化的铁希夫基复合物.
- 引入质子穿通道导致HER效率大约增加了五倍.
结论:
- 微环境,特别是质子穿通道的存在,显著提高了电催化质子减少效率.
- 铁希夫基复合物可以通过协调的碳酸盐基团的pH依赖质子化来激活HER催化.
- 这项研究为设计用于可持续能源应用的先进催化剂提供了洞察力,特别是用于生产.
更多相关视频
相关概念视频
Preparation of Amines: Reductive Amination of Aldehydes and Ketones
3.7K
Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
3.7K
Nitriles to Amines: LiAlH4 Reduction
4.6K
Nitriles are reduced to amines in the presence of strong reducing agents like lithium aluminum hydride through a typical nucleophilic acyl substitution. The reaction requires two equivalents of the reducing agent. The reducing agent acts as a source of hydride ions.
As shown below, the mechanism involves three steps. Firstly, the hydride ion acting as a nucleophile attacks the nitrile carbon to form an anion. In the second step, a second equivalent of the hydride ion attacks the anion to...
As shown below, the mechanism involves three steps. Firstly, the hydride ion acting as a nucleophile attacks the nitrile carbon to form an anion. In the second step, a second equivalent of the hydride ion attacks the anion to...
4.6K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.8K
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...
3.8K
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
8.9K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
8.9K
Reduction of Alkenes: Catalytic Hydrogenation
13.9K
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...
13.9K
Introduction to Mechanisms of Enzyme Catalysis
10.4K
For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
10.4K

![Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F55858.jpg&w=3840&q=50)
