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Related Concept Videos

Acid Halides to Alcohols: LiAlH4 Reduction01:19

Acid Halides to Alcohols: LiAlH4 Reduction

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Acid halides are reduced to alcohols in the presence of a strong reducing agent like lithium aluminum hydride.
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
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Updated: Apr 30, 2026

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Precise Structural Engineering of Bi-Cu@C Hollow Heterostructures via Component Modulation for Selective CO2

Feifan Zhen1, Chen Wang1, Mou Zhang1

  • 1State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|December 29, 2025
PubMed
Summary

Engineered bismuth-copper hollow carbon nanostructures (Bi-Cu@C HS) significantly boost electrochemical CO2 reduction to formate. This advanced catalyst offers high efficiency and stability for sustainable energy applications.

Keywords:
CO2RRbismuthcopperformatehollow structure

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Bismuth-copper (Bi-Cu) bimetallic catalysts are promising for CO2 reduction.
  • Current catalysts face limitations in structural simplicity, activity, selectivity, and stability.

Purpose of the Study:

  • To develop a novel strategy for fabricating advanced heterostructured Bi-Cu catalysts.
  • To enhance the performance of electrochemical CO2 reduction.

Main Methods:

  • Developed a "selective etching-thermal diffusion" strategy.
  • Fabricated heterostructured Bi-Cu nanoparticles within a hollow carbon matrix (Bi-Cu@C HS).
  • Utilized component-regulated phase transformations for nanoscale structural control.

Main Results:

  • Achieved high formate partial current density (22.5 mA cm-2) with 90% Faradaic efficiency at -1.16 V vs. RHE.
  • Demonstrated synergistic Bi-Cu interfacial electronic interactions and optimized hollow architecture.
  • Showcased stable operation (>11 h) with minimal activity decay (<7%).

Conclusions:

  • The Bi-Cu@C HS catalyst exhibits superior CO2-to-formate conversion efficiency and stability.
  • The developed fabrication strategy enables precise nanoscale structural engineering for advanced catalysts.
  • This work provides insights for designing efficient catalysts for sustainable energy conversion.