Enhanced electrocatalytic full water-splitting reaction by interfacial electric field in 2D/2D heterojunction

被引：59

作者：

Choi, Hyeonuk ^{[1
]}

Surendran, Subramani ^{[2
]}

Sim, Yelyn ^{[1
]}

Je, Minyeong ^{[3
]}

Janani, Gnanaprakasam ^{[2
]}

Choi, Heechae ^{[3
]}

Kim, Jung Kyu ^{[4
]}

Sim, Uk ^{[2
,5
]}

机构：

[1] Chonnam Natl Univ, Engn Res Ctr, Dept Mat Sci & Engn, Gwangju 61186, South Korea

[2] Korea Inst Energy Technol KENTECH, Hydrogen Energy Technol Lab, 200 Hyeoksin ro, Naju 58330, Jeonnam, South Korea

[3] Univ Cologne, Inst Inorgan Chem, Theoret Mat & Chem Grp, Greinstr 6, D-50939 Cologne, Germany

[4] Sungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea

[5] NEEL Sci INC, Res Inst, Naju, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2022年 / 450卷

基金：

新加坡国家研究基金会;

关键词：

2D/2D heterostructure; Reduced graphene oxide; Graphitic carbon nitride; Electrocatalyst; Full water-splitting; 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;

D O I：

10.1016/j.cej.2022.137789

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页数：12

共 102 条

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