Synthesis of Ag-decorated vertical graphene nanosheets and their electrocatalytic efficiencies

Jiali CHEN; Peiyu JI; Maoyang LI; Tianyuan HUANG; Lanjian ZHUGE; Xuemei WU

doi:10.1088/2058-6272/ac4bb5

Plasma Science and Technology > 2022 > 24(5): 054001. > DOI: 10.1088/2058-6272/ac4bb5

Jiali CHEN, Peiyu JI, Maoyang LI, Tianyuan HUANG, Lanjian ZHUGE, Xuemei WU. Synthesis of Ag-decorated vertical graphene nanosheets and their electrocatalytic efficiencies[J]. Plasma Science and Technology, 2022, 24(5): 054001. DOI: 10.1088/2058-6272/ac4bb5

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Synthesis of Ag-decorated vertical graphene nanosheets and their electrocatalytic efficiencies

1.
School of Physical Science and Technology and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, People's Republic of China
2.
The Key Laboratory of Thin Films of Jiangsu, Soochow University, Suzhou 215006, People's Republic of China
3.
Analysis and Testing Center, Soochow University, Suzhou 215123, People's Republic of China

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Corresponding author:
Lanjian ZHUGE, E-mail: ljzhuge@suda.edu.cn

Xuemei WU, E-mail: xmwu@suda.edu.cn
Received Date: September 05, 2021
Revised Date: January 12, 2022
Accepted Date: January 13, 2022
Available Online: December 11, 2023
Published Date: April 25, 2022

Graphical Abstract

Abstract

Abstract

Herein we report the successful preparation of silver (Ag)-decorated vertically oriented graphene sheets (Ag/VGs) via helicon wave plasma chemical vapor deposition (HWP-CVD) and radiofrequency plasma magnetron sputtering (RF-PMS). VGs were synthesized in a mixture of argon and methane (Ar/CH₄) by HWP-CVD and then the Ag nanoparticles on the prepared VGs were modified using the RF-PMS system for different sputtering times and RF power levels. The morphology and structure of the Ag nanoparticles were characterized by scanning electron microscopy and the results revealed that Ag nanoparticles were evenly dispersed on the mesoporous wall of the VGs. X-ray diffraction results showed that the diameter of the Ag particles increased with the increase in Ag loading, and the average size was between 10.49 nm and 25.9 nm, consistent with the transmission electron microscopy results. Ag/VGs were investigated as effective electrocatalysts for use in an alkaline aqueous system. Due to the uniquely ordered and interconnected wall structure of VGs, the area of active sites increased with the Ag loading, giving the Ag/VGs a good performance in the oxygen evolution reaction. The double-layer capacitance (C_dl) of the Ag/VGs under different Ag loadings were studied, and the results showed that the highest Ag content gave the best C_dl (1.04 mF cm^-2). Our results show that Ag/VGs are likely to be credible electrocatalytic materials.
- Ag/VGs,
- helicon wave plasma,
- radiofrequency plasma magnetron sputtering

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Acknowledgments

This work is supported by National Natural Science Foundation of China (No. 11975163), the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

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