期刊
INORGANIC CHEMISTRY FRONTIERS
卷 8, 期 6, 页码 1455-1467出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0qi01346c
关键词
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资金
- National Natural Science Foundation [21676129]
- Science & Technology Foundation of Zhenjiang [GY2016021, GY2017001, YE201709]
- High Performance Computing Platform of Jiangsu University
The as-fabricated CoFe2O4@BC nanoflowers exhibit remarkable electrocatalytic activity, providing an effective approach to enhance the performance and stability of transition metal-boride electrocatalysts. The unique flower-like nanoarchitecture, exposure of active sites, boron doping-driven electrical conductivity, defects in porous structures, and synergy between Co and Fe metals and boron contribute to the enhanced HER activity of the CoFe2O4@BC nanoflowers. This work presents a strategic plan for designing efficient and stable B-doped electrocatalysts in an alkaline solution.
Designing simplistic, efficient, durable, and highly eco-friendly electrocatalysts toward the hydrogen evolution reaction is essential for large-scale and economical practical applications. In this work, the as-fabricated CoFe2O4@boron-doped carbon (CoFe2O4@BC) nanoflowers consisted of nanosheets with a porous structure and plenty of enriched catalytic sites. The remarkable electrocatalytic activity of the as-fabricated nanomaterial offers a worthwhile approach to improve the performance and stability of transition metal-boride electrocatalysts. Therefore, the as-synthesized CoFe2O4@BC 500 degrees C electrocatalyst displays a low geometrical overpotential of 58 mV at 10 mA cm(-2) for the HER with a small Tafel slope of 50 mV dec(-1) and long-term stability of 100 h in 1.0 M KOH solution. Ultimately, the outstanding CoFe2O4@BC 500 degrees C nanoflower displays significantly enhanced HER activity, which could be mainly attributed to the following factors: (i) unique flower-like nanoarchitecture fabrication, (ii) the exposure of plentiful active sites in the architecture of the CoFe2O4@BC 500 degrees C nanoflowers, (iii) electrical conductivity of the catalyst driven by the doping of boron, (iv) numerous defects in the porous structures of the nanoflowers and abundant electron delocalization, and (v) the synergistic co-existence of Co and Fe metals and boron, which promotes the electrochemical performance. Therefore, this work provides a unique strategic plan for the design of efficient and stable B-doped electrocatalysts in an alkaline solution.
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