Ze-Feng Xu,Jia Xue,Lei-Lei Li,Xing-Liang Yin,Chuan-Wu Chen,Ya-Nan Jing,Da-Qiang Liu
Developing efficient, stable, and cost-effective electrocatalysts is essential for advancing sustainable water splitting and renewable energy technologies. Here, we report the design of a novel salt-flower-shaped FeP–CoP catalyst, leveraging its unique morphology and synergistic composition for enhanced bifunctional electrocatalysis. The catalyst showed outstanding performance in both hydrogen evolution (HER) and oxygen evolution reactions (OER), achieving low overpotentials of 105 mV and 320 mV at a current density of 10 mA cm−2 for HER and OER, respectively, with Tafel slopes of 106.73 and 93.27 mV dec−1. The exceptional catalytic performance is attributed to the optimized phosphorization process, which enhances active site density, and the synergistic interaction between FeP and CoP, facilitating efficient charge transfer. This study highlights the potential of low-cost, earth-abundant metal-based catalysts for sustainable hydrogen and oxygen production, paving the way for scalable water-splitting technologies.
The inexpensive and highly efficient electrocatalysts toward oxygen evolution reaction (OER) in water splitting electrolysis have displayed promising practical applications to relieve energy crisis. Herein, we prepared a high-yield and structurally regulated bimetallic cobalt-iron phosphide electrocatalyst by a facile one-pot hydrothermal reaction and subsequent low-temperature phosphating treatment. The tailoring of nanoscale morphology was achieved by varying the input ratio and phosphating temperature. Thus, an optimized FeP/CoP-1-350 sample with the ultra-thin nanosheets assembled into a nanoflower-like structure was obtained. FeP/CoP-1-350 heterostructure displayed remarkable activity toward the OER with a low overpotential of 276 mV at a current density of 10 mA cm−2, and a low Tafel slope of only 37.71 mV dec−1. Long-lasting durability and stability were maintained with the current with almost no obvious fluctuation. The enhanced OER activity was attributed to the presence of copious active sites from the ultra-thin nanosheets, the interface between CoP and FeP components, and the synergistic effect of Fe–Co elements in the FeP/CoP heterostructure. This study provides a feasible strategy to fabricate highly efficient and cost-effective bimetallic phosphide electrocatalysts.
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