Related Experiment Video
Updated: Jul 10, 2025
09:50
Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
12.8K
Water activating fresh NiMo foam for enhanced urea electrolysis
Haoxuan Wang1, Kang Xiong1, Lihua Gao1
1Institute of Environmental Health & Green Chemistry, School of Public Health, Nantong University, Jiangsu 226019, China. hxl362349@ntu.edu.cn.
Chemical Communications (Cambridge, England)
|November 22, 2023
Summary
Producing hydrogen via urea oxidation and hydrogen evolution reactions is eco-friendly. This study developed binder-free NiMo foam electrodes for efficient and sustainable hydrogen production.
Area of Science:
- Electrochemistry
- Materials Science
- Sustainable Energy
Background:
- Hydrogen production is crucial for clean energy.
- Urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) offer sustainable pathways.
- Developing efficient electrocatalysts is key for these processes.
Purpose of the Study:
- To develop a novel method for creating highly active and durable electrodes for UOR and HER.
- To investigate the *in situ* growth of Nickel-Molybdenum Layered Double Hydroxide (NiMo LDH) nanosheet arrays on NiMo foam.
Main Methods:
- Water activation approach for *in situ* growth of NiMo LDH nanosheet arrays on NiMo foam.
- Fabrication of binder-free electrodes without pressurizing or heating steps.
- Electrochemical characterization of the electrodes for UOR and HER performance.
Main Results:
- The NiMo foam electrodes exhibited exceptional catalytic activity for both UOR and HER.
- The electrodes demonstrated excellent durability in catalytic reactions.
- *In situ* growth eliminated the need for binders, simplifying electrode fabrication.
Conclusions:
- The developed water activation method enables efficient and sustainable hydrogen production.
- Binder-free NiMo LDH nanosheet arrays on NiMo foam are promising electrocatalysts.
- This approach provides a new strategy for designing high-performance electrodes for energy applications.
More Related Videos
Related Concept Videos
01:23Aldehydes and Ketones with Amines: Imine Formation Mechanism
5.6K
Imine formation involves the addition of carbonyl compounds to a primary amine. It begins with the generation of carbinolamine through a series of steps involving an initial nucleophilic attack and then several proton transfer reactions. The second part includes the elimination of water, as a leaving group, to give the imine.
Imines are formed under mildly acidic conditions. A pH of 4.5 is ideal for the reaction.
If the pH is low or the solution is too acidic, the reaction slows down in the...
Imines are formed under mildly acidic conditions. A pH of 4.5 is ideal for the reaction.
If the pH is low or the solution is too acidic, the reaction slows down in the...
5.6K
01:14Aldehydes and Ketones with Amines: Enamine Formation Mechanism
5.6K
Enamine formation involves the addition of carbonyl compounds to a secondary amine through a series of reactions. The mechanism begins with the generation of carbinolamine, a nucleophilic attack followed by several proton transfer reactions. The hydroxyl group of the carbinolamine is converted into water to make a better leaving group that can push the reaction forward by eliminating a water molecule. In enamine formation, the last step involves the abstraction of a proton from the α carbon to...
5.6K
01:202° Amines to N-Nitrosamines: Reaction with NaNO2
4.3K
Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
4.3K
02:24Comparative Excretory Systems
19.4K
Animals have evolved different strategies for excretion, the removal of waste from the body. Most waste must be dissolved in water to be excreted, so an animal’s excretory strategy directly affects its water balance.
19.4K
01:16Aldehydes and Ketones with Amines: Imine and Enamine Formation Overview
4.8K
Primary amines react with carbonyl compounds—aldehydes and ketones—to generate imines. Imines consist of a C=N double bond and are named Schiff bases after its discoverer—the German chemist Hugo Schiff. On the other hand, secondary amines react with carbonyl compounds to give enamines. In enamines, the presence of a C=C double bond adjacent to the nitrogen atom leads to the delocalization of the lone pair.
4.8K
01:38Preparation of Amines: Reductive Amination of Aldehydes and Ketones
2.9K
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.
2.9K