Related Experiment Video
Updated: Jun 18, 2026
10:57
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Reconstruction and Dissolution of Copper Catalysts during Electrocatalytic Nitrate Reduction
Leslie K Arrazolo1, Kali Rigby1, Jorge Moncada2
1Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States.
Environmental Science & Technology
|June 16, 2026
Summary
Copper electrocatalysts for nitrate remediation suffer material loss during operation. Catalyst structure and electrolyte chemistry significantly impact copper dissolution and overall durability.
Area of Science:
- Materials Science
- Electrochemistry
- Environmental Science
Background:
- Copper-based electrocatalysts are crucial for electrochemical nitrate remediation.
- Catalyst stability and material loss during nitrate reduction reaction (NO3RR) are poorly understood.
- Nanoscale copper restructuring during NO3RR can lead to irreversible material loss.
Purpose of the Study:
- To quantify copper dissolution during NO3RR.
- To investigate the influence of catalyst architecture (single-atom vs. nanoparticles) and electrolyte chemistry on Cu dissolution.
- To establish a link between electrochemical restructuring and material loss.
Main Methods:
- Utilized two model systems: single-atom Cu (Cu1) and Cu nanoparticles (CuNP).
- Employed time-resolved leaching measurements and in situ X-ray absorption spectroscopy (XAS).
- Analyzed catalyst restructuring and dissolution under varying electrolyte conditions.
Main Results:
- Both Cu1 and CuNP catalysts exhibited measurable copper loss during NO3RR.
- CuNP showed greater copper loss than Cu1, particularly during the initial phase of electrolysis.
- Nitrate presence intensified restructuring and copper dissolution, emphasizing electrolyte's role.
Conclusions:
- Electrochemical restructuring directly correlates with copper dissolution during NO3RR.
- Catalyst morphology and electrolyte composition are key factors determining catalyst durability.
- Understanding these factors is vital for designing stable and efficient copper electrocatalysts for nitrate conversion.
Related Concept Videos
01:08Electrodeposition
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
02:50Catalysis
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
01:27Catalysis
Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
01:22Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
01:24Types of Reversible Electrodes
For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...
02:47Voltaic/Galvanic Cells
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...