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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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Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons.
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Related Experiment Video

Updated: Dec 16, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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A highly efficient diatomic nickel electrocatalyst for CO2 reduction.

Meng-Jiao Sun1, Zhi-Wei Gong1, Jun-Dong Yi2

  • 1College of Chemistry, Fuzhou University, Fuzhou, 350108, China and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. zhangteng@fjirsm.ac.cn rcao@fjirsm.ac.cn.

Chemical Communications (Cambridge, England)
|July 7, 2020
PubMed
Summary

Researchers developed a novel carbon-embedded diatomic nickel (Ni2) catalyst for efficient carbon dioxide reduction reaction (CO2RR). This catalyst shows high performance at low nickel content, achieving over 95% faradaic efficiency for CO production.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Developing efficient electrocatalysts for carbon dioxide reduction reaction (CO2RR) is crucial for sustainable energy solutions.
  • Highly dispersed diatomic catalysts offer unique electronic properties for enhanced catalytic activity.
  • Nickel-based catalysts are promising for CO2RR but often require high metal loading or suffer from poor stability.

Purpose of the Study:

  • To develop a facile and effective method for synthesizing highly dispersed diatomic catalysts.
  • To investigate the catalytic performance of a carbon-embedded diatomic Ni2 catalyst for CO2RR.
  • To evaluate the activity, selectivity, and stability of the Ni2 catalyst at low nickel content.

Main Methods:

  • Synthesis of a carbon-embedded diatomic Ni2 catalyst using carbon black, polyaniline, and nickel(II) salts.
  • Electrochemical characterization of the catalyst for CO2RR, including cyclic voltammetry and chronoamperometry.
  • Analysis of product selectivity using gas chromatography and determination of faradaic efficiency.

Main Results:

  • The synthesized diatomic Ni2 catalyst demonstrated excellent activity for CO2RR.
  • Achieved a high faradaic efficiency for CO (over 95%) in the potential range of -0.6 V to -1.0 V vs. RHE.
  • Recorded a high specific current density of 37.2 A mg-1 Ni at -1.1 V, indicating superior performance at low Ni content.

Conclusions:

  • The carbon-embedded diatomic Ni2 catalyst presents a highly effective and low-cost electrocatalyst for CO2RR.
  • The facile synthesis approach yields a catalyst with exceptional performance, paving the way for practical CO2 utilization.
  • This work highlights the potential of diatomic catalysts in advancing electrochemical reduction of carbon dioxide.