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Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

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Polyethyleneimine functionalized platinum superstructures: enhancing hydrogen evolution performance by morphological

Guang-Rui Xu¹, Juan Bai¹, Jia-Xing Jiang¹

¹Key Laboratory of Macromolecular Science of Shaanxi Province , Key Laboratory of Applied Surface and Colloid Chemistry (MOE) , Shaanxi Key Laboratory for Advanced Energy Devices , School of Materials Science and Engineering , Shaanxi Normal University , Xi'an 710062 , China .

Chemical Science

|April 6, 2018

Summary

This summary is machine-generated.

Researchers developed novel platinum superstructures functionalized with polyethyleneimine (Pt-SSs@PEI) for efficient hydrogen production. These advanced materials demonstrate superior performance in the electrocatalytic hydrogen evolution reaction (HER) in acidic conditions.

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Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Published on: June 24, 2022

Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

The electrocatalytic hydrogen evolution reaction (HER) is crucial for sustainable hydrogen production.
Platinum (Pt) nanocrystals are leading electrocatalysts for HER in acidic media, but alternatives are sought.
Developing efficient and cost-effective HER electrocatalysts remains a significant challenge.

Purpose of the Study:

To synthesize and characterize novel polyethyleneimine (PEI) functionalized platinum superstructures (Pt-SSs@PEI).
To investigate the electrocatalytic performance of Pt-SSs@PEI for the hydrogen evolution reaction (HER) in acidic media.
To explore the role of PEI functionalization in enhancing HER activity.

Main Methods:

Facile wet chemical reduction method for synthesizing Pt-SSs@PEI with diverse morphologies.
Comprehensive physical characterizations (e.g., electron microscopy, spectroscopy) to analyze structure and composition.
Electrochemical testing to evaluate HER performance, including onset potential and activity.

Main Results:

Pt-SSs@PEI were successfully synthesized with tetragonal, hierarchical, and branched morphologies.
The functionalized Pt superstructures exhibited an unprecedented onset reduction potential (+64.6 mV vs. RHE) for HER in strong acidic media.
Pt-SSs@PEI outperformed all previously reported electrocatalysts for the HER.

Conclusions:

Interface engineering via PEI functionalization significantly enhances the electrocatalytic performance of Pt nanocrystals for HER.
The protonation of amine groups in PEI plays a key role in the improved HER activity.
Pt-SSs@PEI represent a highly effective strategy for advancing sustainable hydrogen production technologies.