Ni/CoMoO4异构结构的接口工程,用于性介质中的高效水电解
Wendong Wang1, Zhuwei Yu1, Hennayaka Mudiyanselage Charitha Madusanka Jayawardana1
1School of Chemistry and Chemical Engineering Jiangsu University, Zhenjiang 212013, PR China.
Journal of colloid and interface science
|December 17, 2025
概括
这项研究提出了一种新的改性化酸催化剂,用于高效的水分裂. 催化剂对和氧进化反应表现出极好的双功能活性和稳定性,推动了可持续的生产.
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:
- 通过水分的可持续生产需要高效的双功能电催化剂.
- 在性介质中开发具有高活性和稳定的催化剂至关重要.
研究的目的:
- 在泡 (NF) 上合成和表征改性聚酸 (Ni/CoMoO4) 催化剂.
- 评估催化剂对演化反应 (HER) 和氧演化反应 (OER) 的双功能电催化性能.
- 研究催化剂的稳定性,并了解电催化过程中的潜在机制.
主要方法:
- 水热合成,然后用电沉积Ni/CoMoO4在泡上.
- 电化学表征,包括对HER和OER的超电位测量.
- 现场拉曼光谱研究催化剂结构演变.
- 在性介质中进行整体水分裂试验.
主要成果:
- Ni/CoMoO4催化剂在10 mA cm-2.2时表现出47 mV (HER) 和222 mV (OER) 的低超电位.
- 观察到异常的运行稳定性:>100小时 (HER) 和>200小时 (OER).
- 整体水分裂实现了低电池电压1.53V在10mA cm-2下,稳定性>450h在100mA cm-2下.
- 在现场Raman发现了OER期间的催化剂重建,增强了活性部位.
结论:
- 改性显著提高了聚酸的电催化性能和稳定性.
- Ni/CoMoO4催化剂是水分裂中高效和耐用的双功能电催化剂的有希望的候选者.
- 了解现场结构演变为设计先进的电催化剂提供了洞察力.
更多相关视频
13:56Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
8.0K
10:15Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
Published on: November 7, 2025
396
相关概念视频
Water: A Bronsted-Lowry Acid and Base
The reaction between a Brønsted-Lowry acid and water is called acid ionization. For example, when hydrogen fluoride dissolves in water and ionizes, protons are transferred from hydrogen fluoride molecules to water molecules, yielding hydronium ions and fluoride ions:
Solubility Equilibria: Ionic Product of Water
Pure water is a weak electrolyte; only a small amount ionizes into hydrogen and hydroxide ions. At any given temperature, the concentration of undissociated water is almost constant, so the ionic product of water is the product of the hydrogen and hydroxide ion concentrations, denoted as Kw. The square root of Kw gives the individual ion concentrations.
The ionic product of water varies with temperature, and its value is 1.0 x 10−14 at standard experimental conditions. Per Le Chatelier's...
The ionic product of water varies with temperature, and its value is 1.0 x 10−14 at standard experimental conditions. Per Le Chatelier's...
Interfacial Electrochemical Methods: Overview
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...
Precipitation and Co-precipitation
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
Coagulation
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
