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Related Concept Videos

Catalysis02:50

Catalysis

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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.
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Electrodeposition01:08

Electrodeposition

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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...
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Processes at Electrodes01:30

Processes at Electrodes

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The electrode interacts with ions in the electrolyte solution at its interface. The rate of oxidation and reduction depends on the speed at which electrons can transfer through this interface. As ions attach to or leave the electrode surface, the electrode acquires a charge, and an electrical potential forms across the interface, making the process more difficult to reach equilibrium. The charge on the electrode affects the local ion concentrations in the solution, though thermal motion...
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Updated: Apr 30, 2026

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
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Atomic-level engineering Ni-N2O2 interfacial structure for enhanced CO2 electrocatalytic reduction efficiency.

Bingyuan Dai1, Minxuan Wang1, Hui Xu1

  • 1State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.

Journal of Colloid and Interface Science
|March 14, 2025
PubMed
Summary

Researchers developed a novel O-doped Ni single-atom catalyst (Ni-NOG) with a Ni-N2O2 structure for efficient carbon dioxide reduction reaction (CO2RR). This catalyst shows high selectivity and stability, advancing electrocatalyst design.

Keywords:
COCO(2)RRSingle Ni atomStability

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Precise atomic-scale preparation of single-atomic active sites for CO2RR electrocatalysts is challenging.
  • Understanding the atomic-level mechanisms of these catalysts is crucial for improving performance.
  • Existing catalysts often struggle with selectivity and long-term stability in CO2RR.

Purpose of the Study:

  • To synthesize a novel O-doped Ni single-atom catalyst (Ni-NOG) with a specific Ni-N2O2 coordination structure.
  • To investigate the role of oxygen doping and coordination environment in enhancing CO2RR performance.
  • To elucidate the catalytic mechanism at the atomic level.

Main Methods:

  • A simple one-pot synthesis method was employed to create the Ni-NOG catalyst.
  • Electrochemical characterization was performed to evaluate CO2RR performance, including Faraday efficiency and selectivity.
  • Theoretical simulations were utilized to understand the reaction mechanism and active site behavior.

Main Results:

  • The synthesized Ni-NOG catalyst demonstrated a Ni-N2O2 symmetric coordination structure.
  • Achieved a high Faraday efficiency of 97.4% at -0.8315 V vs. RHE with over 95% selectivity for CO2RR.
  • Exhibited excellent stability over 98 hours, surpassing many advanced catalysts.

Conclusions:

  • The O-doped Ni single-atom catalyst with Ni-N2O2 coordination offers a straightforward preparation method.
  • Oxygen incorporation and the specific coordination environment significantly boost catalytic selectivity and efficiency.
  • The catalyst shows robust activity due to a small activation barrier in the rate-limiting step, favoring intermediate generation.