NiFeRuOx nanosheets on Ni foam as an electrocatalyst for efficient overall alkaline seawater splitting

2023, Volume 17, Issue 11

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Frontiers of Chemical Science and Engineering >> 2023, Volume 17, Issue 11 doi: 10.1007/s11705-023-2334-8

NiFeRuO_x nanosheets on Ni foam as an electrocatalyst for efficient overall alkaline seawater splitting

Received: 2023-03-13 Accepted: 2023-08-01 Available online: 2023-08-01

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Abstract

The electrocatalyst NiFeRuO_x/NF, comprised of NiFeRuO_x nanosheets grown on Ni foam, was synthesized using a hydrothermal process followed by thermal annealing. NiFeRuO_x/NF displays high electrocatalytic activity and stability for overall alkaline seawater splitting: 98 mV@ 10 mA∙cm⁻² in hydrogen evolution reaction, 318 mV@ 50 mA∙cm⁻² in oxygen evolution reaction, and a cell voltage of 1.53 V@ 10 mA∙cm⁻², as well as 20 h of durability. A solar-driven system containing such a bifunctional NiFeRuO_x/NF has an almost 100% Faradaic efficiency. The NiFeRuO_x coating around Ni foam is an anti-corrosion layer and also a critical factor for enhancement of bifunctional performances.

Keywords

NiFeRuO_x nanosheets ; Ni foam ; electrocatalysis ; overall seawater splitting ; solar-driven system

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