rGO@Cu2ZnSnS4 chalcopyrites modified polypyrrole paper-based photoanode for solar water splitting

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2024-03-28 DOI:10.1007/s42823-024-00708-2

Anupma Thakur, Pooja Devi

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引用次数: 0

Abstract

Flexible electrodes, particularly paper electrodes modified with polypyrrole, have shown promise in energy-related applications. We have earlier demonstrated the usage of paper electrodes modified with polypyrrole as a flexible and suitable photoanode for photoelectrochemical water splitting (PEC). Further, modification of this electrode system with an appropriate tandem absorber system for solar fuel production is interesting in developing efficient photoanodes. In this study, we study the PEC performance of flexible polypyrrole-based paper photoanodes (PPy-PAs) by decorating them with rGO@Cu₂ZnSnS₄ chalcopyrites (rGO@CZTS/PPy-PAs). The lower bandgap (~ 1.5 eV) of the rGO@CZTS/PPy-PAs system allows for efficient visible light absorption, substantially improving PEC water-splitting reactions. The rGO@CZTS/PPy-PAs exhibited an enhanced current density of ~ 13.2 mA/cm² at 1.23 V vs RHE, ABPE of ~ 1.5%, and a hydrogen evolution rate of 177 μmoles/min/cm². Overall, rGO@CZTS/PPy-PAs showed 2.1-fold, 1.1-fold, and 1.4-fold enhancement in photocurrent activity over PPy-PAs, CZTS/PPy-PAs, and rGO/PPy-PAs, respectively. The usability of rGO@CZTS/PPy-PAs is established in the form of stable photocurrent for more than 200 min. These findings open new possibilities for developing modified PPy PAs as flexible PEs for efficient solar-driven PEC devices and give directions on improving flexible PEs for flexible and efficient solar-driven PEC systems.

Graphical abstract

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用于太阳能水分离的 rGO@Cu2ZnSnS4 黄铜矿改性聚吡咯纸基光电阳极

柔性电极，尤其是用聚吡咯改性的纸电极，在能源相关应用中大有可为。我们早前已经证明，使用聚吡咯修饰的纸电极是一种灵活、适用的光阳极，可用于光电化学水分离（PEC）。此外，将这种电极系统与适当的串联吸收器系统进行改性，用于太阳能燃料生产，对于开发高效光阳极也很有意义。在本研究中，我们通过用 rGO@Cu2ZnSnS4 黄铜矿（rGO@CZTS/PPy-PAs）装饰柔性聚吡咯基纸光阳极（PPy-PAs），研究了其 PEC 性能。rGO@CZTS/PPy-PAs 系统具有较低的带隙（约 1.5 eV），能够有效吸收可见光，从而大大改善了 PEC 水分离反应。在 1.23 V 对比 RHE 时，rGO@CZTS/PPY-PAs 的电流密度提高了约 13.2 mA/cm2，ABPE 提高了约 1.5%，氢进化率提高了 177 μmoles/min/cm2。总体而言，与 PPy-PAs、CZTS/PPy-PAs 和 rGO/PPy-PAs 相比，rGO@CZTS/PPy-PAs 的光电流活性分别提高了 2.1 倍、1.1 倍和 1.4 倍。rGO@CZTS/PPy-PAs 在 200 分钟以上的稳定光电流证明了其可用性。这些发现为开发改性 PPy PAs 作为柔性 PEs 用于高效太阳能驱动的 PEC 器件提供了新的可能性，并为改进柔性 PEs 用于柔性和高效太阳能驱动的 PEC 系统指明了方向。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.