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Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes

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Rh metallene with functionalized polypyrrole surface for hydrogen evolution over a wide pH range.

Wenxin Wang¹, Kai Deng¹, Qiqi Mao¹

¹State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China.

|October 19, 2022

Summary

Researchers developed polypyrrole-modified Rh metallene for efficient, pH-universal hydrogen evolution reactions (HER). This 2D material modification enhances catalytic activity and stability for electrocatalysis.

Keywords:

Rh metallene electrocatalysis hydrogen evolution reaction polypyrrole surface modification

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Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

Interface engineering of 2D materials is crucial for enhancing catalytic reactions.
Conductive polymers offer a viable route to modify material interfaces for improved performance.

Purpose of the Study:

To develop a simple and universal strategy for synthesizing polypyrrole (PPy) modified Rh metallene (Rh@PPy metallene).
To investigate the pH-universal hydrogen evolution reaction (HER) performance of the synthesized material.

Main Methods:

Synthesis of polypyrrole (PPy) modified Rh metallene.
Electrochemical characterization of HER activity in acidic, alkaline, and neutral buffer solutions.
Assessment of material stability and durability.

Main Results:

The Rh@PPy metallene exhibited excellent HER activity across a wide pH range.
Low overpotentials of 16 mV (H2SO4), 39 mV (KOH), and 42 mV (PBS) were achieved at 10 mA cm⁻².
The material demonstrated outstanding stability and durability in electrochemical tests.

Conclusions:

The Rh@PPy metallene presents an efficient and stable electrocatalyst for pH-universal HER.
The strategy of metallene-organic interface engineering provides a pathway for designing advanced electrocatalysts.
This approach is applicable to various electrocatalytic applications beyond HER.