相关实验视频

Updated: Jul 1, 2025

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

在高电流密度下构建CoNi-LDH/Fe MOF/NF异构催化剂,用于高能效的OER和UOR

Qing-Nan Bian¹, Ben-Shuai Guo¹, Dong-Xing Tan¹

¹Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, China.

ACS applied materials & interfaces

|March 14, 2024

概括

一种新的CoNi-LDH/Fe MOF/NF异构催化剂显著提高了水电解的氧演化反应 (OER) 效率. 用尿素氧化反应 (UOR) 取代OER进一步减少生产中的能源消耗.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

缓慢的氧化演化反应 (OER) 动力学需要高超电位,增加水电解中的能源消耗以生产.
开发高效的电催化剂至关重要,以克服这些局限性,并使成本效益高的产生.

研究的目的:

设计和合成一种具有纳米针阵列形态的新型CoNi-LDH/Fe MOF/NF异构催化剂.
为了评估氧化演化反应 (OER) 和尿素氧化反应 (UOR) 的异构结构的电催化性能.
调查尿素氧化反应 (UOR) 作为OER在整体尿素分裂 (OUS) 中更节能替代品的潜力.

主要方法:

在泡 (NF) 上制造一个CoNi-LDH/Fe MOF/NF异构催化剂.
在1.0 M KOH溶液中对OER和UOR的催化剂性能进行电化学表征.
与单元催化剂 (CoNi-LDH/NF和Fe MOF/NF) 的催化活动比较.
在两电极电解电池中评估整体尿素分解 (OUS) 和整体水分解 (OWS).

主要成果:

对于OER,CoNi-LDH/Fe MOF/NF异构催化剂在电流密度分别为500和1000mA/cm2时实现了275mV和305mV的低超电位.
异构催化剂的活性明显高于单个CoNi-LDH/NF和Fe MOF/NF催化剂,这是由于协同效应.
将OER替换为UOR,在相同电流密度下,OER降低了80mV和40mV的超电位.
整体尿素分裂 (OUS) 需要在100mA/cm2处电池电压为1.55V,比整体水分裂 (OWS) 电压低60mV.

结论:

异构催化剂的合理设计,如CoNi-LDH/Fe MOF/NF,可以显著提高电催化性能.
在水电解中使用尿素氧化反应 (UOR) 而不是OER可以大大降低能源消耗.
这项研究提出了一种通过电催化技术高效,低成本生产的有希望的战略.

关键词:

不同结构异构结构.非贵金属电催化剂非贵金属电催化剂总体而言,水分化是水分化的.氧气进化反应反应氧气进化反应尿素氧化反应是尿素的氧化反应.

更多相关视频

Multifunctional Hybrid Fe2O3-Au Nanoparticles for Efficient Plasmonic Heating

Multifunctional Hybrid Fe2O3-Au Nanoparticles for Efficient Plasmonic Heating

Published on: February 20, 2016

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

Published on: October 20, 2023

相关概念视频

Metal-Semiconductor Junctions

Metal-Semiconductor Junctions

The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...

Thermal and Photochemical Electrocyclic Reactions: Overview

Thermal and Photochemical Electrocyclic Reactions: Overview

Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.

Interfacial Electrochemical Methods: Overview

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...