Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 652, Issue -, Pages 1217-1227Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2023.08.141
Keywords
N -doped carbon; Interface structure; Freshwater electrolysis; Seawater electrolysis
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In this study, the electronic structure of MoO2 was adjusted by constructing N-doped carbon sheets supported P-Fe3O4-MoO2 nanosheets. The results showed that P-Fe3O4-MoO2/NC exhibited superior oxidation activity in freshwater and seawater electrolysis at low cell voltages compared to the commercial catalyst RuO2.
Electric-driven freshwater/seawater splitting is an attractive and sustainable route to realize the generation of H2 and O2. Molybdenum-based oxides exhibit poor activity toward freshwater/seawater electrolysis. Herein, we adjusted the electronic structure of MoO2 by constructing N-doped carbon sheets supported P-Fe3O4-MoO2 nanosheets (P-Fe3O4-MoO2/NC). P-Fe3O4-MoO2/N-doped carbon sheets were precisely prepared by pyrolysis of Schiff base Fe complex and MoO3 nanosheets through phosphorization. Benefiting from the unique structures of the samples, it required 119/145 mV to drive freshwater/seawater reduction reaction at 10 mA/cm2. P-Fe3O4MoO2/NC catalysts exhibited superior freshwater/seawater oxidation reactivity with 180/189 mV at 10 mA/cm2 compared with commercial RuO2. The low cell voltages for P-Fe3O4-MoO2/NC were 1.47 and 1.59 V towards freshwater and seawater electrolysis, respectively. Our work might shed light on the structural modulation of Mo-based oxides for enhancing freshwater and seawater electrolysis activity.
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