Universität zu Köln

Li, Oi Lun, Pham, Nguyet N. T., Kim, Jihun, Choi, Heechae, Lee, Dae Hoon, Yang, Yang, Yao, Wenhui, Cho, Young-Rae and Lee, Seung Geol (2020). Insights on boosting oxygen evolution reaction performance via boron incorporation into nitrogen-doped carbon electrocatalysts. Appl. Surf. Sci., 528. AMSTERDAM: ELSEVIER. ISSN 1873-5584

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Abstract

The exploration of high-efficiency electrocatalysts for water splitting is significant for large-scale hydrogen production. Herein, boron atoms were incorporated into nitrogen-doped carbon as electrocatalyst through a one-step plasma synthesis route. The obtained B,N-codoped catalyst presented superior electrocatalytic performance, with an onset potential of 1.46 V vs RHE and corresponding overpotentials of 270 mV and 509 mV at current densities of 10 and 100 mA cm(-2), which were significantly lower than that of N-doped carbon (1.56 V vs RHE, 331 mV and 554 mV), and even outperformed the commercial 5 wt% Ru/C (1.48 V vs RHE, 275 mV and 547 mV). Moreover, it exhibited higher stability than Ru/C in 9-h durability test and remained relatively high OER catalytic activities. Density functional theory has verified the OH molecule was firstly adsorbed on the top side of B atom in the B,N-codoped carbon. The OH* chemisorption energy on B,N-codoped carbon was less than that on N-doped carbon catalyst system by 0.281 eV, which translated into a higher kinetic OER activity of B,N-codoped carbon. Combined with the electrochemical performance, boron as OER active sites in B,N-codoped carbon should be considered as a valid strategy to boost the performance of heteroatom-doped carbon OER electrocatalysts.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Li, Oi Lun UNSPECIFIED UNSPECIFIED UNSPECIFIED Pham, Nguyet N. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Jihun UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Heechae UNSPECIFIED UNSPECIFIED UNSPECIFIED Lee, Dae Hoon UNSPECIFIED UNSPECIFIED UNSPECIFIED Yang, Yang UNSPECIFIED UNSPECIFIED UNSPECIFIED Yao, Wenhui UNSPECIFIED UNSPECIFIED UNSPECIFIED Cho, Young-Rae UNSPECIFIED UNSPECIFIED UNSPECIFIED Lee, Seung Geol UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-314030
DOI:	10.1016/j.apsusc.2020.146979
Journal or Publication Title:	Appl. Surf. Sci.
Volume:	528
Date:	2020
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1873-5584
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language METAL-FREE ELECTROCATALYSTS; TOTAL-ENERGY CALCULATIONS; HYDROGEN EVOLUTION; WATER OXIDATION; ACTIVE-SITES; REDUCTION; GRAPHENE; EFFICIENT; SULFUR; CHALLENGES Multiple languages Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/31403