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Bidirectional electronic modulation between active sites and the support for synergistically enhanced alkaline
Haijun Wang1, Jiatong Wang1, Ruonan Wang2
1School of Materials Science and Engineering, Ocean University of China, 1299 Sansha Road, Qingdao, Shandong Province, 266404, P. R. China. dongbohua@ouc.edu.cn.
This study introduces a new method to improve platinum use in alkaline hydrogen evolution reactions (HER). The novel ZrP/Pt catalyst shows high activity and durability, offering a promising design for efficient, low-platinum catalysts.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- The hydrogen evolution reaction (HER) is crucial for clean energy technologies.
- Maximizing platinum (Pt) utilization is key to reducing the cost of HER electrocatalysts.
- Developing efficient electrocatalysts for alkaline HER remains a significant challenge.
Purpose of the Study:
- To develop a bidirectional modification strategy for enhancing platinum utilization in alkaline HER.
- To synthesize and characterize a novel ZrP/Pt catalyst for alkaline HER.
- To evaluate the catalytic activity, stability, and mass activity of the developed catalyst.
Main Methods:
- Bidirectional modification strategy applied to platinum.
- Synthesis of ZrP/Pt catalyst.
- Electrochemical characterization including activity and stability tests at a current density of -250 mA cm-2.
- Mass activity determination at -0.1 V.
Main Results:
- The ZrP/Pt catalyst demonstrates comparable activity to commercial 20% Pt/C.
- The catalyst exhibits excellent stability, sustaining performance for over 200 hours at -250 mA cm-2.
- A high mass activity of 10.62 A mgPt-1 was achieved at -0.1 V, indicating superior Pt utilization.
Conclusions:
- The bidirectional modification strategy effectively maximizes Pt utilization for alkaline HER.
- ZrP/Pt presents a highly active and durable electrocatalyst for alkaline HER.
- This work provides a promising design principle for developing cost-effective, low-Pt electrocatalysts.
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