Self-activatable carbon nanotube@ruthenium-catechol coordination complex for hydrogen evolution reaction
Chenzhi Wu1, Tong Wu1, Zhenbin Tang1
1Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen University, Xiamen 361005, People's Republic of China.
Nanotechnology
|June 22, 2022
Summary
We developed a novel metal-polymer-carbon composite for efficient hydrogen evolution. This material demonstrates superior performance and stability in alkaline conditions, offering a promising alternative to platinum catalysts.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Developing efficient electrocatalysts for hydrogen evolution reaction (HER) is crucial for clean energy technologies.
- Metal-polymer-carbon composites offer tunable properties for enhanced catalytic activity.
- Existing methods for composite synthesis can be energy-intensive or complex.
Purpose of the Study:
- To develop a simple, pyrolysis-free method for synthesizing a metal-polymer-carbon composite for HER.
- To investigate the electrocatalytic performance of the novel composite in alkaline media.
- To establish a core-shell structure utilizing metal-catechol coordination on carbon nanotubes.
Main Methods:
- Synthesized a boronate ester polymer shell on carbon nanotubes (CNTs).
- Utilized ruthenium ions (Ru3+) to etch the polymer shell and form a ruthenium-catechol complex (TAC-Ru) coating, creating CNT@TAC-Ru.
- Activated the electrocatalytic properties of CNT@TAC-Ru through electrochemical cycling.
Main Results:
- The as-activated CNT@TAC-Ru composite exhibited excellent hydrogen evolution reaction (HER) performance.
- Achieved a low overpotential of 10 mV at 10 mA cm-2 in 1.0 M KOH.
- Demonstrated superior HER activity compared to commercial Pt/C and desirable long-term stability.
Conclusions:
- A simple metal ion-catechol coordination strategy effectively created a CNT@TAC-Ru core-shell structure.
- The developed composite shows high potential for efficient and stable hydrogen production in alkaline electrolytes.
- This work presents a promising, pyrolysis-free approach for advanced electrocatalyst fabrication.
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