Universität zu Köln

Thiyagarajan, Ganesh Babu, Mukkavilli, Raghunath Sharma, Graf, David, Fischer, Thomas, Wilhelm, Michael, Christiansen, Silke, Mathur, Sanjay and Kumar, Ravi ORCID: 0000-0001-6856-6092 (2022). Self-supported amorphous TaNx(O-y)/nickel foam thin film as an advanced electrocatalyst for hydrogen evolution reaction. Chem. Commun., 58 (20). S. 3310 - 3314. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1364-548X

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Abstract

Chemical vapor deposited (CVD) amorphous tantalum-oxy nitride film on porous three-dimensional (3D) nickel foam (TaNx(O-y)/NF) utilizing tantalum precursor, tris(diethylamino)(ethylimino)tantalum(V), ([Ta(NEt)(NEt2)(3)]) with preformed Ta-N bonds is reported as a potential self-supported electrocatalyst for hydrogen evolution reaction (HER). The morphological analyses revealed the formation of thin film of core-shell structured TaNx(O-y) coating (ca. 236 nm) on NF. In 0.5 M H2SO4, TaNx(O-y)/NF exhibited enhanced HER activity with a low onset potential as compared to the bare NF (-50 mV vs. -166 mV). The TaNx(O-y)/NF samples also displayed higher current density (-11.08 mA cm(-2)vs. -3.36 mA cm(-2) at 400 mV), lower Tafel slope (151 mV dec(-1)vs. 179 mV dec(-1)) and lower charge transfer resistance exemplifying the advantage of TaNx(O-y) coating towards enhanced HER performance. The enhanced HER catalytic activity is attributed to the synergistic effect between the amorphous TaNx(O-y) film and the nickel foam.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Thiyagarajan, Ganesh Babu UNSPECIFIED UNSPECIFIED UNSPECIFIED Mukkavilli, Raghunath Sharma UNSPECIFIED UNSPECIFIED UNSPECIFIED Graf, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Wilhelm, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Christiansen, Silke UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Kumar, Ravi UNSPECIFIED orcid.org/0000-0001-6856-6092 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-680015
DOI:	10.1039/d2cc00151a
Journal or Publication Title:	Chem. Commun.
Volume:	58
Number:	20
Page Range:	S. 3310 - 3314
Date:	2022
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	1364-548X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NICKEL FOAM; EFFICIENT Multiple languages Chemistry, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68001