NixB/Mo0.8B3 Nanorods Encapsulated by a Boron-Rich Amorphous Layer for Universal pH Water Splitting at the Ampere Level
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | 2402866 |
Journal / Publication | Advanced Energy Materials |
Volume | 14 |
Issue number | 45 |
Online published | 4 Oct 2024 |
Publication status | Published - 6 Dec 2024 |
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Abstract
Heterostructured interfaces are crucial to electrocatalysts for water splitting. Herein, coral-like multiheterostructured NixB/Mo0.8B3 (NMB) nanorods encapsulated by a boron-rich amorphous layer are prepared for water splitting. Density-functional theory (DFT) calculations indicate that the NMB interface adjusts the d-band center and electronic structure of the molybdenum sites. Owing to the strong electronic coupling between Ni, Mo, and B at the heterojunction, large number of exposed catalytic active sites, as well as the special hydrophilic characteristics endowed by the surrounding amorphous layer, the NMB catalyst exhibits remarkable universal-pH hydrogen evolution reaction (HER) activity with low overpotentials (η) of 15, 26, and 83 mV to deliver 10 mA cm−2 in basic, acid, and neutral media, respectively, and outstanding oxygen evolution reaction (OER) characteristics in the basic medium with η10 and η500 of 170 and 420 mV, respectively. The unique self-supporting 3D hierarchical interconnected structure facilitates mass transport thus leading to high mechanical stability for 450 and 200 h in HER and OER at ≈1000 mA cm−2. More importantly, the NMB exhibits excellent performance toward overall-water electrolysis as a bifunctional catalyst with ultralow cell voltages of 1.45/1.56/1.85 V @ 10/100/1000 mA cm−2, demonstrating the large potential in industrial water splitting applications. © 2024 Wiley-VCH GmbH.
Research Area(s)
- amorphous/crystalline heterostructures, hydrogen evolution reaction, hydrophilicity, overall water splitting, universal pH
Citation Format(s)
NixB/Mo0.8B3 Nanorods Encapsulated by a Boron-Rich Amorphous Layer for Universal pH Water Splitting at the Ampere Level. / Rafiq, Madiha; Harrath, Karim; Feng, Meijun et al.
In: Advanced Energy Materials, Vol. 14, No. 45, 2402866, 06.12.2024.
In: Advanced Energy Materials, Vol. 14, No. 45, 2402866, 06.12.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review