期刊
ACS APPLIED ENERGY MATERIALS
卷 3, 期 8, 页码 7619-7628出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c01040
关键词
metal oxy-borides; oxygen evolution; alkali water splitting; seawater electrolysis; chlorine oxidation
资金
- U. K. Commonwealth Scholarship Commission through the Commonwealth Rutherford Fellowship [INRF-2017-139]
- UGC [EMR/2016/003028]
- SERB-DST [EMR/2016/003028]
- EPSRC-GCRF [141131/155337]
- Research England (U.K.) through the Industrial Strategy HEIF Allocation 2019-2020 Pump Priming Fund Round 6 [163792]
- INTERREG Atlantic Area Programme [EAPA_190_2016]
- EPSRC [EP/P034497/1]
- EPSRC [EP/P034497/1] Funding Source: UKRI
With a motivation to discover efficient materials for direct electrolysis of seawater, bimetallic oxy-boride (Co-Fe-O-B) nanostructures were developed using a facile hydrothermal synthesis strategy, with varying content of Fe. The oxygen evolution performance of the optimized Co-Fe-O-B catalyst in alkali water (1 M KOH) showed higher reaction rates owing to a Co3O4-core-Co2B-shell structure, which assists in the formation of active CoOOH species at lower potentials and offers a smaller charge-transfer resistance. The best-performing catalyst in alkali water was found to be highly active (294 mV to achieve 10 mA/cm(2)) in saline water (1 M KOH + 0.5 M NaCl), with 100% O-2 selectivity, establishing its potential for seawater electrolysis. The high activity and selectivity of the oxy-boride catalyst in alkaline saline electrolyte presents a fresh avenue for research in low-cost materials, especially boron-containing compounds, for selective seawater splitting.
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