1. NaBH4 pretreatment of NiCo nanowires for in-situ phosphating to prepare high-performance catalysts for HER.
- Author
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Zhou, Qi, Cao, Qingbin, Liu, Haorui, Feng, Chenchen, and Su, Wenxiao
- Subjects
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PHOSPHATE coating , *NANOWIRES , *NICKEL phosphide , *ATOMIC hydrogen , *CATALYSTS , *CATALYTIC activity , *HYDROGEN evolution reactions , *CHRONOAMPEROMETRY - Abstract
• The special microstructure of urchin-like nanoflowers and nanowires was synthesized, which had superhydrophilicity. • Different sodium borohydride treatment time affects the morphology and activity of the product. • The elements B and P exhibit a synergistic effect, resulting in the attainment of favorable catalytic activity. This study presents a proposed three-step synthetic route for the efficient synthesis of B-NiCoP/NF, aiming to produce a highly active catalyst for the hydrogen evolution reaction (HER). The B-NiCoP/NF catalyst demonstrates a remarkable performance, requiring only 42.1 mV in 1 M KOH solution to achieve a current density of 10 mA·cm−2. Moreover, the catalyst demonstrates exceptional long-term stability, enduring 2000 CV cycles or 55 h of chronopotentiometry tests, at a current density of 50 mA·cm−2. The exceptional performance of the catalyst can be ascribed to the superhydrophilic properties of the unique microstructure of urchin-like nanoflowers and nanowires, as well as the synergistic effect of elements P and B. This effect promotes water dissociation, reduces surface hydrogen absorption, and hinders the oxidation of phosphide active sites. In conclusion, this research has successfully developed and produced an efficient catalyst for the HER, along with a versatile pretreatment technique. The application of this method holds significant importance in enhancing the phosphating process in various catalytic systems. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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