Efficient CoMoRu0.25Ox/NF nanoplate architectures for overall electrochemical water splitting

The development of inexpensive electrocatalysts with excellent electrocatalytic activity for the hydrogen and oxygen evolution reactions (HER and OER, respectively) has been challenging. In this study, we synthesized cobalt molybdenum ruthenium oxide with porous, loosely-assembled nanoplate morpholo...

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Bibliographic Details
Published in:International journal of hydrogen energy 2022-12, Vol.47 (94), p.39908-39916
Main Authors: Thiyagarajan, Dhandayuthapani, Thirumurugan, Arun, Lee, Bong-Kee
Format: Article
Language:English
Subjects:
Bifunctional electrocatalyst
Cobalt molybdenum oxide
Heterointerface
Overall water splitting
Ruthenium
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Summary:The development of inexpensive electrocatalysts with excellent electrocatalytic activity for the hydrogen and oxygen evolution reactions (HER and OER, respectively) has been challenging. In this study, we synthesized cobalt molybdenum ruthenium oxide with porous, loosely-assembled nanoplate morphology. The CoMoRu0.25Ox/NF electrocatalyst exhibited the highest electrocatalytic activity, requiring overpotentials of 230 and 78 mV for the OER and HER, respectively, to attain a current density of 10 mA cm−2; moreover, its long-term stability was outstanding. The electrocatalyst required a cell voltage of only 1.51 V for overall water splitting in an alkaline medium, which was lower than that required by many CoMo-based catalysts. [Display omitted] •CoMoRu0.25Ox/NF nanoplates were prepared using a two-step hydrothermal process.•The CoMoRu0.25Ox/NF nanoplates exhibited excellent OER and HER activities.•RuO2-CoMoOx heterointerface accelerated the water-splitting kinetics.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2022.09.144