Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 8, Issue 39, Pages 20323-20330Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta07624d
Keywords
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Funding
- National Natural Science Foundation of China (NSFC) [21701096]
- Qingdao Applied Basic Research Project [19-6-2-17-cg]
- Opening Project of Shandong Eco-chemical Engineering Collaborative Innovation Center [XTCXQN05]
- Young Taishan Scholarship Project of Shandong Province [tsqn201909115]
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The synthesis of highly active, stable and cost-effective electrocatalysts for overall water splitting is critical but challenging. Herein, we synthesized nickel-doped pyrrhotite iron sulfide (Fe0.95-xNixS1.05) nanosheetsviaa one-pot synthetic route. When tested for oxygen evolution reaction (OER) performance in alkaline solutions, the as-prepared Fe(0.8)Ni(0.15)S(1.05)catalyst exhibited superior electrocatalytic performance to commercial IrO(2)with a current density of 10 mA cm(-2)at an overpotential of 228 mV, and a Tafel slope of 53 mV dec(-1). The hydrogen evolution reaction (HER) activity was achieved on Fe(0.8)Ni(0.15)S(1.05)with a Tafel slope of 103 mV per decade, and a current density of 10 mA cm(-2)at an overpotential of 263 mV. With nickel doping, the as-prepared pyrrhotite iron sulfide nanosheets can expose more active sites, and hence act as a highly efficient catalyst for overall water splitting.
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