Amorphous nickel-cobalt complexes hybridized with 1T-phase molybdenum disulfide via hydrazine-induced phase transformation for water splitting

Highly active and robust eletcrocatalysts based on earth-abundant elements are desirable to generate hydrogen and oxygen as fuels from water sustainably to replace noble metal materials. Here we report an approach to synthesize porous hybrid nanostructures combining amorphous nickel-cobalt complexes...

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Bibliographic Details
Published inNature communications Vol. 8; no. 1; pp. 15377 - 11
Main Authors Li, Haoyi, Chen, Shuangming, Jia, Xiaofan, Xu, Biao, Lin, Haifeng, Yang, Haozhou, Song, Li, Wang, Xun
Format Journal Article
LanguageEnglish
Published England Nature Publishing Group 09.05.2017
Nature Portfolio
Subjects
Cobalt
Energy consumption
Hydrogen
Microscopy
Molybdenum
Nickel
United States > US
Iowa
China
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Summary:Highly active and robust eletcrocatalysts based on earth-abundant elements are desirable to generate hydrogen and oxygen as fuels from water sustainably to replace noble metal materials. Here we report an approach to synthesize porous hybrid nanostructures combining amorphous nickel-cobalt complexes with 1T phase molybdenum disulfide (MoS ) via hydrazine-induced phase transformation for water splitting. The hybrid nanostructures exhibit overpotentials of 70 mV for hydrogen evolution and 235 mV for oxygen evolution at 10 mA cm with long-term stability, which have superior kinetics for hydrogen- and oxygen-evolution with Tafel slope values of 38.1 and 45.7 mV dec . Moreover, we achieve 10 mA cm at a low voltage of 1.44 V for 48 h in basic media for overall water splitting. We propose that such performance is likely due to the complete transformation of MoS to metallic 1T phase, high porosity and stabilization effect of nickel-cobalt complexes on 1T phase MoS .
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms15377