以酒精为媒介的废弃丝织品转化为自助式碳框架,与CoSe定,用于双功能电催化水分裂
Lanlan Yang1, Taoyi Shen1, Xiang Chen1
1State Key Laboratory of Bio-based Fiber Materials, College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou 310018, China.
Langmuir : the ACS journal of surfaces and colloids
|July 28, 2025
概括
这项研究引入了一种新型的色化物/废丝衍生碳 (CoSe/SC) 催化剂,用于高效的水分. 混合材料在电催化和氧演变反应中表现出极好的稳定性和性能.
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:
- 开发高效的电催化剂用于水分离对于可再生能源技术至关重要.
- 过渡金属化物提供了有前途的催化活性,但往往遭受不良的稳定性和导电性.
- 需要具有丰富活跃站点的自我支结构来提高性能.
研究的目的:
- 为了合成一种新型的自支合金化物/废丝衍生的碳 (CoSe/SC) 混合催化剂.
- 研究以酒精为媒介的溶热和热解策略对催化剂结构和性能的协同效应.
- 为了评估CoSe/SC催化剂的电催化活性和稳定性,用于整体的水分裂.
主要方法:
- 以酒精为媒介的化纳米颗粒的溶液热合成.
- 控制废丝的热解,以创建一个等级化的碳矩阵.
- 制造一个自支的CoSe/SC混合催化剂.
- 使用线性扫描电压测量和时电压测量等技术进行电化学表征.
主要成果:
- CoSe/SC混合催化剂表现出优异的电导率和层次结构.
- 优化的CoSe/SC-2催化剂在10 mA cm−2.2时实现了254.4 mV (HER) 和278.7 mV (OER) 的低超电位.
- 催化剂表现出增强的稳定性,由于强烈的Se-C结合,在整体水分裂中运行了130小时.
结论:
- CoSe/SC混合催化剂是有效和稳定的电催化水分裂的有希望的材料.
- 协同战略有效地将化与生物质衍生的碳支持相结合.
- 这项工作为设计来自可再生资源的先进过渡金属化物催化剂提供了宝贵的见解.
相关概念视频
02:29Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis
Overview
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
02:15Preparation of Alcohols via Addition Reactions
Overview
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
02:35Acid-Catalyzed Dehydration of Alcohols to Alkenes
In a dehydration reaction, a hydroxyl group in an alcohol is eliminated along with the hydrogen from an adjacent carbon. Here, the products are an alkene and a molecule of water. Dehydration of alcohols is generally achieved by heating in the presence of an acid catalyst. While the dehydration of primary alcohols requires high temperatures and acid concentrations, secondary and tertiary alcohols can lose a water molecule under relatively mild conditions.
02:23Alcohols from Carbonyl Compounds: Reduction
Reduction is a simple strategy to convert a carbonyl group to a hydroxyl group. The three major pathways to reduce carbonyls to alcohols are catalytic hydrogenation, hydride reduction, and borane reduction.
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
01:12Acid Halides to Esters: Alcoholysis
Alcoholysis is a nucleophilic acyl substitution reaction in which an alcohol functions as a nucleophile. Acid halides react with alcohol to produce esters. The mechanism proceeds in three steps:
01:27Production of Alcohol
Continuous fermentation is a key strategy in industrial ethanol production, particularly when efficiency, scalability, and high yields are essential. This approach allows for uninterrupted operation and optimized resource utilization. The primary feedstock, corn starch, undergoes enzymatic hydrolysis facilitated by α-amylase and glucoamylase. These enzymes break down the starch into fermentable sugars such as glucose, which are readily assimilated by fermentative microorganisms.Fermentation...