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:
CreatorsEmailORCIDORCID Put Code
Li, Oi LunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pham, Nguyet N. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kim, JihunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Choi, HeechaeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, Dae HoonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yang, YangUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yao, WenhuiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cho, Young-RaeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, Seung GeolUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
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:
KeywordsLanguage
METAL-FREE ELECTROCATALYSTS; TOTAL-ENERGY CALCULATIONS; HYDROGEN EVOLUTION; WATER OXIDATION; ACTIVE-SITES; REDUCTION; GRAPHENE; EFFICIENT; SULFUR; CHALLENGESMultiple languages
Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed MatterMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/31403

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