Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 326, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2023.122403
Keywords
Metal-organic frameworks; Open hollow structure; Etching; Trimetallic phosphide; Seawater splitting
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In this study, a unique tri-metal phosphide open nanotube structure [FeCoNiP@carbon quantum dots, FCNP@CQDs] is fabricated for electrocatalytic water splitting. The FCNP@CQDs exhibit excellent catalytic performance due to their open structure. In alkaline seawater solution, a low overpotential of 268 mV is required for oxygen evolution reaction, while the eta 20 of hydrogen evolution reaction is 150 mV. The integrated strategy of CQDs-doping and construction of hollow open structures may open a new and relatively unexplored path for fabricating high-performance seawater splitting catalysis.
The hollow materials with open structure can accelerate the mass transfer and bubble release rate, which have attracted tremendous attention for electrocatalytic water splitting. In this work, a unique tri-metal phosphide open nanotube structure [FeCoNiP@carbon quantum dots, FCNP@CQDs] is firstly fabricated by a selected etching and phosphating process with a MIL-88A@CQDs (MIL stands for Material of Institute Lavoisier) as the precursor. Benefiting from their open structure, FCNP@CQDs exhibit excellent catalytic performance. In alkaline seawater solution, a low overpotential of 268 mV is required to reach 20 mA cm-2 current density for oxygen evolution reaction, while the eta 20 of hydrogen evolution reaction is 150 mV. The FCNP@CQDs//FCNP@CQDs electrolyzer requires a voltage of 1.61 V to reach 10 mA cm-2. The integrated strategy of CQDs-doping and construction of hollow open structures may open a new and relatively unexplored path for fabricating high-performance seawater splitting catalysis.
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