The development of non-precious metal electrocatalysts for oxygen evolution reaction (OER) is crucial for generating large-scale hydrogen through water electrolysis. In this work, bimetal phosphides embedded in electrospun carbon nanofibers (P-FeNi/CNFs) were fabricated through a reliable electrospinning-carbonization-phosphidation strategy. The incorporation of P-FeNi nanoparticles within CNFs prevented them from forming aggregation and further improved their electron transfer property. The bimetal phosphides helped to weaken the adsorption of O intermediate, promoting the OER activity, which was confirmed by the theoretical results. The as-prepared optimized P-Fe 1 Ni 2 /CNFs catalyst exhibited very high OER electrocatalytic performance, which required very low overpotentials of just 239 and 303 mV to reach 10 and 1000 mA cm -2 , respectively. It is superior to the commercial RuO 2 and many other related OER electrocatalysts reported so far. In addition, the constructed alkaline electrolyzer based on the P-Fe 1 Ni 2 /CNFs catalyst and Pt/C delivered a cell voltage of 1.52 V at 10 mA cm -2 , surpassing the commercial RuO 2 ||Pt/C (1.61 V) electrolyzer. It also offered excellent alkaline OER performance in simulated seawater electrolyte. This demonstrated its potential for practical applications across a broad range of environmental conditions. Our work provides new ideas for the ration design of highly efficient non-precious metal-based OER catalysts for water electrolysis.
Keyphrases
- highly efficient
- metal organic framework
- electron transfer
- ionic liquid
- visible light
- reduced graphene oxide
- cell therapy
- wastewater treatment
- room temperature
- mesenchymal stem cells
- liquid chromatography
- heavy metals
- carbon dioxide
- simultaneous determination
- bone marrow
- human health
- molecularly imprinted
- drug induced
- solid phase extraction
- oxide nanoparticles