TY - JOUR
T1 - Enhanced electrocatalytic full water-splitting reaction by interfacial electric field in 2D/2D heterojunction
AU - Choi, Hyeonuk
AU - Surendran, Subramani
AU - Sim, Yelyn
AU - Je, Minyeong
AU - Janani, Gnanaprakasam
AU - Choi, Heechae
AU - Kim, Jung Kyu
AU - Sim, Uk
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/12/15
Y1 - 2022/12/15
N2 - 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.
AB - 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.
KW - 2D/2D heterostructure
KW - Electrocatalyst
KW - Full water-splitting
KW - Graphitic carbon nitride
KW - Reduced graphene oxide
UR - http://www.scopus.com/inward/record.url?scp=85133887764&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.137789
DO - 10.1016/j.cej.2022.137789
M3 - Article
AN - SCOPUS:85133887764
SN - 1385-8947
VL - 450
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 137789
ER -
