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Dual-phase Cobalt Phosphide/phosphate Hybrid Interactions via Iridium Nanocluster Interfacial Engineering Toward Efficient Overall Seawater Splitting by Van Hien Hoa; Muthu Austeria; Huyen Thi Dao; Mai Mai; Do Hwan Kim is a Energy article available to read on EtoBox.

What is Dual-phase Cobalt Phosphide/phosphate Hybrid Interactions via Iridium Nanocluster Interfacial Engineering Toward Efficient Overall Seawater Splitting about?

Surface engineering and electronic modification are the two primary elements for improving the catalytic properties of electrode materials. We significantly improved the catalytic performances of interfacial-engineered Ir nanocluster-containing cobalt phosphide/phosphate heterostructured nanowires on nickel foam (Ir-Co 2 P/ Co 2 P 2 O 7 NWs/NF) in water splitting. The optimized Ir nanocluster content of 0.05 wt% resulted in a highly efficient catalytic performance, significantly outperforming commercial IrO 2 and Pt-C catalysts. The Ir 0.05 -Co 2 P/ Co 2 P 2 O 7 NW bifunctional electrocatalyst displayed cell potentials of 1.52, 1.60, 1.62, and 1.67 V in 1.0 M KOH and mimic, simulated, and natural seawater, respectively, at 10 mA cm -2 . DFT analysis confirmed that the heterostructure enrichment in the z-oriented D-orbital facilitates strong electronic interactions between the adsorbates and surfaces. The keys were the simultaneous generation of metal phosphide/phosphate via activation of the P site on the support. Furthermore, the electrocatalyst exhibited a solar-to-hydrogen efficiency of 22.4% in solar energy-aided water splitting, indicating that it is a viable, inexpensive cand

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Author

Van Hien Hoa; Muthu Austeria; Huyen Thi Dao; Mai Mai; Do Hwan Kim

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Energy (Physical Sciences)