Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Nanoparticles Na4Ni3Р4О15-Ni(OH)2 Core-Shell as hybrid electrocatalyst for the oxygen evolution reaction in alkaline electrolyte

Abstract

There are wide interests in developing efficient, robust and low-cost electrode materials for electrolysis of water to produce clean hydrogen fuel. It is especially important to improve the performance and durability of electrocatalysts for OER. Here we showed that the transformation of nanoparticles (n-NNP) and crystalline (c-NNP) forms of mixed phosphate Na4Ni3(PO4)2P2O7 in highly alkaline solutions occurs along various routes and provokes generation of 2D-nanosheets Ni(OH)2 or stable particles of core(phosphate)-shell(Ni(OH)2), respectively. In both cases, in carbon matrix (through chemical and electrochemical conversion of phosphate in situ during electrolysis in 6 M KOH or NaOH solution) stable OER electrocatalysts with low overpotentials of 250-290 mV at a current density of 10 mA·cm-2 were obtained. The best candidate for OER process is core-shell particles, which maintain overpotentials of around 250 mV in 6 M KOH more than 3 days. The activity enhancement can be attributed to formation of abundant system of NiOOH nanoparticles on the shell surface due to improved lattice matching. The report discusses further prospects for the creation of core-shell particles to reduce the overpotential of durable electrocatalysts for OER.

Back to tab navigation

Supplementary files

Article information


Submitted
01 Apr 2020
Accepted
09 May 2020
First published
11 May 2020

Dalton Trans., 2020, Accepted Manuscript
Article type
Paper

Nanoparticles Na4Ni3Р4О15-Ni(OH)2 Core-Shell as hybrid electrocatalyst for the oxygen evolution reaction in alkaline electrolyte

M. Chen, D. S. Butenko, I. V. Odynets, I. Zatovsky, J. Li, W. Han and N. Klyui, Dalton Trans., 2020, Accepted Manuscript , DOI: 10.1039/D0DT01205J

Social activity

Search articles by author

Spotlight

Advertisements