Ni–Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis

Abstract A free-standing catalyst electrode for the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) in a urea electrolysis cell was synthesized by electroplating a Ni–Fe alloy onto carbon felt, followed by phosphidation (P-NiFe@CF). The prepared P-NiFe@CF catalyst consisted of Ni...

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Autores principales:	Woo Hyun Yun, Gautam Das, Bohyeon Kim, Bang Ju Park, Hyon Hee Yoon, Young Soo Yoon
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e42ef537dc184b71bed595c74e585308
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spelling	oai:doaj.org-article:e42ef537dc184b71bed595c74e5853082021-11-14T12:19:46ZNi–Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis10.1038/s41598-021-01383-32045-2322https://doaj.org/article/e42ef537dc184b71bed595c74e5853082021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01383-3https://doaj.org/toc/2045-2322Abstract A free-standing catalyst electrode for the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) in a urea electrolysis cell was synthesized by electroplating a Ni–Fe alloy onto carbon felt, followed by phosphidation (P-NiFe@CF). The prepared P-NiFe@CF catalyst consisted of Ni5P4, NiP2, and FeP with 3D flower-like P-NiFe architecture on CF. P-NiFe@CF exhibited excellent electrocatalytic activity for the UOR (demanding only 1.39 V (vs. RHE) to achieve 200 mA cm−2), and for the HER with a low overpotential of 0.023 V (vs. RHE) at 10 mA cm−2, indicating its feasibility as a bifunctional catalyst electrode for urea electrolysis. A urea electrolysis cell with P-NiFe@CF as both the free-standing anode and cathode generated a current density of 10 mA cm−2 at a cell potential of 1.37 V (vs. RHE), which is considerably lower than that of water electrolysis, and also lower than previously reported values. The results indicate that the P-NiFe@CF catalyst electrodes can be used as free-standing bifunctional electrodes for urea electrolyzers.Woo Hyun YunGautam DasBohyeon KimBang Ju ParkHyon Hee YoonYoung Soo YoonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Woo Hyun Yun Gautam Das Bohyeon Kim Bang Ju Park Hyon Hee Yoon Young Soo Yoon Ni–Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis
description	Abstract A free-standing catalyst electrode for the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) in a urea electrolysis cell was synthesized by electroplating a Ni–Fe alloy onto carbon felt, followed by phosphidation (P-NiFe@CF). The prepared P-NiFe@CF catalyst consisted of Ni5P4, NiP2, and FeP with 3D flower-like P-NiFe architecture on CF. P-NiFe@CF exhibited excellent electrocatalytic activity for the UOR (demanding only 1.39 V (vs. RHE) to achieve 200 mA cm−2), and for the HER with a low overpotential of 0.023 V (vs. RHE) at 10 mA cm−2, indicating its feasibility as a bifunctional catalyst electrode for urea electrolysis. A urea electrolysis cell with P-NiFe@CF as both the free-standing anode and cathode generated a current density of 10 mA cm−2 at a cell potential of 1.37 V (vs. RHE), which is considerably lower than that of water electrolysis, and also lower than previously reported values. The results indicate that the P-NiFe@CF catalyst electrodes can be used as free-standing bifunctional electrodes for urea electrolyzers.
format	article
author	Woo Hyun Yun Gautam Das Bohyeon Kim Bang Ju Park Hyon Hee Yoon Young Soo Yoon
author_facet	Woo Hyun Yun Gautam Das Bohyeon Kim Bang Ju Park Hyon Hee Yoon Young Soo Yoon
author_sort	Woo Hyun Yun
title	Ni–Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis
title_short	Ni–Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis
title_full	Ni–Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis
title_fullStr	Ni–Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis
title_full_unstemmed	Ni–Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis
title_sort	ni–fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e42ef537dc184b71bed595c74e585308
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Ni–Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis

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