Universität zu Köln

Choi, Hyeonuk ORCID: 0000-0001-6798-1999, Surendran, Subramani ORCID: 0000-0003-0750-3199, Sim, Yelyn, Je, Minyeong, Janani, Gnanaprakasam, Choi, Heechae ORCID: 0000-0002-9390-6607, Kim, Jung Kyu ORCID: 0000-0002-8218-0062 and Sim, Uk (2022). Enhanced electrocatalytic full water-splitting reaction by interfacial electric field in 2D/2D heterojunction. Chem. Eng. J., 450. LAUSANNE: ELSEVIER SCIENCE SA. ISSN 1873-3212

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Abstract

To increase the productivity of hydrogen and oxygen generation, the carbon-based electrocatalyst with 2D/2D structure, graphitic carbon nitride with reduced graphene oxide (g-C3N4/rGO), was synthesized via a facile electrostatic self-assembly method and was used as electrocatalyst for full water-splitting. In the alkaline electrolyte, g-C3N4/rGO showed lower overpotential and Tafel slope of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively, than the other 2D structured materials. The DFT calculation simulates the spontaneous electron transfer, low charge transfer resistance, and internal electric field of g-C3N4/rGO electrocatalysts. Especially, the internal electric field between the g-C3N4 and rGO is beneficial in solving the local pH reduction problem and electron transport. Consequentially, our study elucidates that 2D/2D structure, inducing the internal electric field, is an effective way to enhance the performance of the full water-splitting system.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Choi, Hyeonuk UNSPECIFIED orcid.org/0000-0001-6798-1999 UNSPECIFIED Surendran, Subramani UNSPECIFIED orcid.org/0000-0003-0750-3199 UNSPECIFIED Sim, Yelyn UNSPECIFIED UNSPECIFIED UNSPECIFIED Je, Minyeong UNSPECIFIED UNSPECIFIED UNSPECIFIED Janani, Gnanaprakasam UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Heechae UNSPECIFIED orcid.org/0000-0002-9390-6607 UNSPECIFIED Kim, Jung Kyu UNSPECIFIED orcid.org/0000-0002-8218-0062 UNSPECIFIED Sim, Uk UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-679186
DOI:	10.1016/j.cej.2022.137789
Journal or Publication Title:	Chem. Eng. J.
Volume:	450
Date:	2022
Publisher:	ELSEVIER SCIENCE SA
Place of Publication:	LAUSANNE
ISSN:	1873-3212
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language REDUCED GRAPHENE OXIDE; GRAPHITIC CARBON NITRIDE; LAYERED DOUBLE HYDROXIDE; GENERALIZED GRADIENT APPROXIMATION; HIGH-PERFORMANCE ELECTROCATALYST; TOTAL-ENERGY CALCULATIONS; OXYGEN EVOLUTION; HYDROGEN EVOLUTION; SURFACE-CHARGE; FORMIC-ACID Multiple languages Engineering, Environmental; Engineering, Chemical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67918