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Three-Dimensional Transition Metal Phosphide Heteronanorods for Efficient Overall Water Splitting
Rushuo Li1, Jianbing Zang1, Wei Li1
1State Key Laboratory of Metastable Materials Science and Technology, School of Materials Science and Engineering, Yanshan University, Qinhuangdao, 066004, P. R. China.
Chemsuschem
|May 5, 2020
Summary
Researchers developed a novel, low-cost catalyst for efficient water splitting. This durable, nonprecious-metal catalyst, P-NM-CF HNRs, shows high activity for oxygen and hydrogen evolution reactions.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Efficient and durable electrocatalysts are crucial for cost-effective water splitting.
- Developing nonprecious-metal catalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) remains a significant challenge.
Purpose of the Study:
- To develop a scalable strategy for fabricating 3D heteronanorods for efficient water splitting.
- To investigate the catalytic performance of nickel molybdenum phosphide covered with cobalt iron phosphide (P-NM-CF HNRs) for OER and HER.
Main Methods:
- Fabrication of 3D heteronanorods (P-NM-CF HNRs) on nickel foam using a simple and scalable strategy.
- Electrocatalytic testing for OER and HER under alkaline and wide-pH conditions.
- Durability testing for overall water splitting.
Main Results:
- P-NM-CF HNRs exhibit a large surface area, optimized electronic structures, and synergistic effects.
- The catalyst demonstrates high catalytic activity for OER and wide-pH HER.
- Achieved a low voltage of 1.53 V for 10 mA cm⁻² current density in overall water splitting with excellent stability over 36 hours.
Conclusions:
- The rational design of P-NM-CF HNRs offers a promising pathway for durable, nonprecious-metal electrocatalysts.
- This strategy can inspire the development of catalysts for large-scale industrial water splitting applications.
