{"title":"Fabrication of novel Pd-WO3-PPD/GO/ACGS electrode for dual-function in high-performance supercapacitors and efficient water splitting","authors":"Peyman Taghizadeh, Reza Dadashi, Morteza Bahram, Khalil Farhadi","doi":"10.1016/j.diamond.2025.112620","DOIUrl":null,"url":null,"abstract":"<div><div>The development of clean and renewable energy sources as well as supercapacitors to replace fossil fuels is an important challenge to deal with environmental problems. In this study, for the first time, simultaneous electrochemical deposition of poly p-Phenylene diamine (PPD) polymer and tungsten metal oxide (WO<sub>3</sub>) followed by electrodoping of palladium (Pd) nanoparticles was carried out on graphene oxide sheets formed on anodized commercial graphite sheet (GO/ACGS). The performance of Pd-WO<sub>3</sub>-PPD/GO/ACGS photoelectrode for both hydrogen production and energy storage is investigated. Also, the surface morphology and chemical structure of Pd-WO<sub>3</sub>-PPD/GO/ACGS photoelectrode are investigated by FE-SEM, EDX-EDX mapping, ATR-IR, Raman, and XRD tests. Electrochemical behavior investigation of the Pd-WO<sub>3</sub>-PPD/GO/ACGS electrode showed excellent capacitance of 635.16 mF cm<sup>−2</sup> at 1 mA cm<sup>−2</sup> and a good hydrogen production ability of 31 mmol cm<sup>−2</sup> after 2 h in 1 M H<sub>2</sub>SO<sub>4</sub> electrolyte solution. The results of the fabricated solid-state supercapacitor device show that the fabricated device had a good capacitance of 177 mF cm<sup>−2</sup>), maximum power density of 3500 mW cm<sup>−2</sup>, an energy density of 25.02 mWh cm<sup>−2</sup> at 0.5 mA cm<sup>−2</sup> and excellent cyclic stability and coulombic efficiency of 91 % and 99.4 % after 7000 GCD cycles, respectively. The results of the dual application of the fabricated electrode for energy production and storage showed that this electrode has good potential for use in both fields.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112620"},"PeriodicalIF":4.3000,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Diamond and Related Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925963525006776","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}
引用次数: 0
Abstract
The development of clean and renewable energy sources as well as supercapacitors to replace fossil fuels is an important challenge to deal with environmental problems. In this study, for the first time, simultaneous electrochemical deposition of poly p-Phenylene diamine (PPD) polymer and tungsten metal oxide (WO3) followed by electrodoping of palladium (Pd) nanoparticles was carried out on graphene oxide sheets formed on anodized commercial graphite sheet (GO/ACGS). The performance of Pd-WO3-PPD/GO/ACGS photoelectrode for both hydrogen production and energy storage is investigated. Also, the surface morphology and chemical structure of Pd-WO3-PPD/GO/ACGS photoelectrode are investigated by FE-SEM, EDX-EDX mapping, ATR-IR, Raman, and XRD tests. Electrochemical behavior investigation of the Pd-WO3-PPD/GO/ACGS electrode showed excellent capacitance of 635.16 mF cm−2 at 1 mA cm−2 and a good hydrogen production ability of 31 mmol cm−2 after 2 h in 1 M H2SO4 electrolyte solution. The results of the fabricated solid-state supercapacitor device show that the fabricated device had a good capacitance of 177 mF cm−2), maximum power density of 3500 mW cm−2, an energy density of 25.02 mWh cm−2 at 0.5 mA cm−2 and excellent cyclic stability and coulombic efficiency of 91 % and 99.4 % after 7000 GCD cycles, respectively. The results of the dual application of the fabricated electrode for energy production and storage showed that this electrode has good potential for use in both fields.
期刊介绍:
DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices.
The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.