AI Article Synopsis
- - Heteroatom doping improves the electronic properties of transition metal phosphides, enhancing efficiency in hydrogen evolution reactions (HER), but traditional methods can be complex and harsh.
- - A new ion-exchange strategy allows for even doping of Mo and V into Ni-Co phosphides under gentle conditions while preserving their nanoneedle structure.
- - Mo-doped NiCoP demonstrates superior performance compared to V-doped variants and even surpasses the activity of platinum catalysts, highlighting the potential of this method for developing effective catalysts.
Article Abstract
Heteroatom doping is a promising strategy to optimize the electronic structure of transition metal phosphides so enhancing the hydrogen evolution reaction (HER). However, complex and harsh experimental design is often required to achieve homogeneous doping of corresponding elements while achieving the best regulating effect. Herein, a facile ion-exchange (IE) strategy is applied to dope Mo/V species evenly into Ni-Co phosphides under mild conditions while maintaining the nanoneedle morphology. The electrochemical characterization verifies Mo dopants have a better electronic regulation effect on NiCoP crystal than V dopants, corresponding to the better hydrogen evolution performance of Mo-NiCoP/NF. Notably, due to the highly dispersed nanoneedle morphology, the synergistic effect of Ni-Co phosphides, and the optimized electronic structure, Mo-NiCoP/NF demonstrates a higher activity than that of the noble metal Pt/C at the high current density (>99 mA cm). The present work is supposed to open new sights for the development of high-performance catalysts by ion-exchange strategy.
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| http://dx.doi.org/10.1016/j.jcis.2021.06.166 | DOI Listing |
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