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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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Highly Efficient CO2 Electroreduction on ZnN4 -based Single-Atom Catalyst.

Fa Yang1,2, Ping Song1, Xiaozhi Liu3,4

  • 1State Key Laboratory of Electroanalytical Chemistry, Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, 130022, P. R. China.

Angewandte Chemie (International Ed. in English)
|July 24, 2018
PubMed
Summary
This summary is machine-generated.

A novel zinc single-atom catalyst effectively converts carbon dioxide to carbon monoxide. This nitrogen-anchored catalyst shows high activity, selectivity, and durability for carbon monoxide production.

Keywords:
carbon dioxideelectroreductionsingle-atom catalystszinc

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Area of Science:

  • Electrochemistry
  • Catalysis
  • Materials Science

Background:

  • Electrochemical reduction of carbon dioxide (CO2RR) to carbon monoxide (CO) is crucial for synthesizing carbon-based fuels and feedstocks.
  • Single-atom catalysts offer unique properties for enhanced catalytic performance compared to bulk materials.

Purpose of the Study:

  • To develop and investigate a nitrogen-anchored zinc single-atom catalyst for efficient CO2RR to CO.
  • To evaluate the catalyst's activity, selectivity, durability, and turnover frequency.

Main Methods:

  • Electrochemical characterization to determine catalytic activity and selectivity.
  • Density Functional Theory (DFT) calculations to understand the active site and reaction mechanism.
  • Long-term stability tests to assess durability.

Main Results:

  • The Zn single-atom catalyst achieved an onset overpotential as low as 24 mV.
  • High selectivity for CO was observed, with a Faradaic efficiency (FE_CO) up to 95% at -0.43 V.
  • Remarkable durability exceeding 75 hours and a high turnover frequency (TOF) of 9969 h⁻¹ were demonstrated.
  • Experimental and DFT results identified the Zn-N4 site as the active center, with low free energy barrier for *COOH formation.

Conclusions:

  • The nitrogen-anchored Zn single-atom catalyst is highly effective for CO2RR to CO.
  • The Zn-N4 active site plays a critical role in the catalytic process.
  • This catalyst demonstrates significant potential for industrial applications in CO production.