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Related Experiment Video

Updated: May 17, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

The actual Co(10-12) surface structure and CO activation.

Haocheng Wang^1,2,3, Zongfang Wu⁴, Junjie Shi^1,2,3

¹State Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, P. R. China.

Nature Communications

|May 15, 2026

Summary

This summary is machine-generated.

Researchers discovered a new atomic arrangement on cobalt surfaces, the Co(10-12)-B termination, which significantly impacts Fischer-Tropsch synthesis. This finding necessitates reconsidering previous catalytic studies on cobalt catalysts.

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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO₂ Reduction

Published on: April 10, 2018

Area of Science:

Surface Science
Catalysis
Materials Science

Background:

The hexagonal close-packed cobalt (Co) (10-12) surface exhibits two known atomic arrangements.
Previous studies predominantly utilized the Co(10-12)-A termination, identified via low-energy electron diffraction (LEED).
Subsurface oxygen species (O_sub) can persist on Co(10-12) surfaces, complicating characterization and reactivity studies.

Purpose of the Study:

To investigate the influence of subsurface oxygen on the Co(10-12) surface.
To prepare a clean Co(10-12) surface free from subsurface oxygen.
To characterize the atomic arrangement and catalytic activity of the oxygen-free Co(10-12) surface.

Main Methods:

Utilized a novel strategy involving H₂-induced segregation of subsurface oxygen.
Employed ion sputtering and annealing to remove segregated oxygen, preparing a clean surface.
Characterized the surface termination and coordination using low-energy electron diffraction (LEED) intensity/voltage analysis.

Main Results:

Successfully prepared an oxygen-free Co(10-12) surface exhibiting the Co(10-12)-B termination.
The Co(10-12)-B termination features sevenfold, ninefold, and tenfold coordinated cobalt atoms.
Direct CO activation is significantly favored over H-assisted CO activation on the Co(10-12)-B surface, contrasting with the Co(10-12)-A surface.

Conclusions:

The Co(10-12)-B termination represents a previously overlooked surface structure for cobalt.
The catalytic behavior, specifically CO activation, on the Co(10-12)-B surface differs markedly from the Co(10-12)-A surface.
Fundamental understanding of Fischer-Tropsch synthesis on cobalt catalysts requires re-evaluation using the Co(10-12)-B surface.