Fe-Doped Ni/Co-Based Selenide Hierarchical Nanosheet Arrays as Self-Supporting Bifunctional Electrocatalysts for Overall Water Splitting
Source abstract
Abstract
It is necessary to optimize the electrocatalytic activity of an electrocatalyst by means of morphology and composition regulation. Herein, Fe-doped bimetallic selenide hierarchical nanosheet arrays grown on nickel foam (Fe-NiCoSe/NiCoSe/NF) are obtained for overall water splitting. The Fe-NiCoSe/NiCoSe/NF is fabricated by selenizing the NiCoFe Prussian blue analogue (NiCoFe-PBA) growing on a NiCo-layered double hydroxide (NiCo-LDH). Benefiting from the hierarchical nanosheet arrays, the synergistic effect of the bimetallic selenides, as well as the electronic structure rearrangement caused by Fe-doping, the Fe-NiCoSe/NiCoSe/NF catalyst exhibits low overpotentials of 120 mV for hydrogen evolution reaction (HER) and 199 mV for oxygen evolution reaction (OER) at 10 mA·cm –2 in 1.0 M KOH. In addition, when used as a bifunctional electrocatalyst for overall water splitting, the Fe-NiCoSe/NiCoSe/NF requires a cell voltage of 1.93 V (1.82 V) to reach 100 mA·cm –2 (50 mA·cm –2 ). Additionally, Fe-NiCoSe/NiCoSe/NF exhibits prolonged durability lasting for 150 h at 10 mA·cm –2 . This work provides a reasonable idea for designing a hierarchical nanostructured bifunctional electrocatalyst toward overall water splitting by regulating the structure and composition.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Electrochemical Analysis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang 830017, P. R. China
College of Chemical Engineering, Xinjiang University, Urumqi, Xinjiang 830017, P. R. China
Funding
Natural Science Foundation of Xinjiang Uygur Autonomous Region · National Natural Science Foundation of China
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