Dense platinum/nickel oxide heterointerfaces with abundant oxygen vacancies enable ampere-level current density ultrastable hydrogen evolution in alkaline

Wang, Kaixi, Wang, Shuo, Hui, Kwan San ORCID: https://orcid.org/0000-0001-7089-7587, Li, Junfeng, Zha, Chenyang, Dinh, Duc Anh, Shao, Zongping, Yan, Bo, Tang, Zikang and Hui, Kwun Nam (2023) Dense platinum/nickel oxide heterointerfaces with abundant oxygen vacancies enable ampere-level current density ultrastable hydrogen evolution in alkaline. Advanced Functional Materials, 33 (8). ISSN 1616-301X

Microsoft Word (OpenXML) (13. Manuscript-final) - Accepted Version Download (5MB)

Abstract

Platinum (Pt) remains the benchmark electrocatalyst for alkaline hydrogen evolution reaction (HER), but its industry-scale hydrogen production is severely hampered by the lack of well-designed durable Pt-based materials that can operate at ampere-level current densities. Herein, based on the original oxide layer and parallel convex structure on the surface of nickel foam (NF), a 3D quasi-parallel architecture consisting of dense Pt nanoparticles (NPs) immobilized oxygen vacancy-rich NiOx heterojunctions (Pt/NiOx-OV) as an alkaline HER catalyst is developed. A combined experimental and theoretical studies manifest that anchoring Pt NPs on NiOx-OV leads to electron-rich Pt species with altered density of states (DOS) distribution, which can efficiently optimize the d-band center and the adsorption of reaction intermediates as well as enhance the water dissociation ability. The as-prepared catalyst exhibits extraordinary HER performance with a low overpotential of 19.4 mV at 10 mA cm−2, a mass activity 16.3-fold higher than that of 20% Pt/C, and a long durability of more than 100 h at 1000 mA cm−2. Furthermore, the assembled alkaline electrolyzer combined with NiFe-layered double hydroxide requires extremely low voltage of 1.776 V to attain 1000 mA cm−2, and can operate stably for more than 400 h, which is rarely achieved.

Item Type:	Article
Additional Information:	Funding Information: This work was financially supported by the Science and Technology Development Fund, Macau SAR (File no. 0191/2017/A3, 0041/2019/A1, 0046/2019/AFJ, 0021/2019/AIR, 0007/2021/AGJ), University of Macau (File no. MYRG2017-00216-FST, MYRG2018-00192-IAPME, MYRG2020-00187-IAPME, MYRG2022-00223-IAPME), the UEA funding, and the Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 05/2019/TN. The DFT calculations are performed at High Performance Computing Cluster (HPCC) of Information and Communication Technology Office (ICTO) at University of Macau.
Uncontrolled Keywords:	hydrogen evolution reactions,large current densities,oxygen vacancy-rich nickel oxides,platinum-based heterostructures,quasi-parallel nanostructures,electronic, optical and magnetic materials,chemistry(all),biomaterials,materials science(all),condensed matter physics,electrochemistry,sdg 7 - affordable and clean energy ,/dk/atira/pure/subjectarea/asjc/2500/2504
Faculty \ School:	Faculty of Science > School of Engineering (former - to 2024)
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	LivePure Connector
Date Deposited:	25 Apr 2024 10:31
Last Modified:	12 Oct 2024 23:58
URI:	https://ueaeprints.uea.ac.uk/id/eprint/95005
DOI:	10.1002/adfm.202211273

Downloads

Actions (login required)

View Item