掺铜硫化锌钴纳米片作为先进的双功能电催化剂,通过电化学水分离实现可持续制氢

IF 23.2 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Composites and Hybrid Materials Pub Date : 2024-09-27 DOI:10.1007/s42114-024-00985-5
Jagadis Gautam, Seul-Yi Lee, Soo-Jin Park
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引用次数: 0

摘要

掺杂异构体是一种创新策略,可用于微调催化剂的电子结构和动力学,以实现高效的水分离。我们通过六亚甲基四胺辅助水热法合成了一种新型铜掺杂硫化锌钴纳米片(Cu-ZnCoS/NF)电催化剂。所得催化剂性能卓越,在碱性环境中分别以 20 mA cm-2 和 50 mA cm-2 进行氢进化反应(HER 119/217 mV)和氧进化反应(OER 210/280 mV)时,过电位极低。以 Cu-ZnCoS/NF 为阴极和阳极的水电解槽/阴离子交换膜(AEM)电解槽可分别在 1.51 V/1.88 V 的低电压下运行数小时。密度泛函理论(DFT)和电化学测试表明,电子结构的调节优化了中间吸附能,增强了电活性中心,并促进了分水过程的电荷转移。这些发现为探索类似催化剂作为实用电解槽设备的强效电催化剂铺平了道路。
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Copper-doped zinc cobalt sulfide nanosheets as advanced bifunctional electrocatalysts for sustainable hydrogen production via electrochemical water splitting

Heteroatom doping represents an innovative strategy for finely tuning a catalyst’s electronic structure and kinetics for efficient water splitting. We synthesized a novel electrocatalyst of copper-doped zinc cobalt sulfide nanosheets (Cu-ZnCoS/NF) via a hexamethylenetetramine-assisted hydrothermal process. The resulting catalyst exhibits exceptional performance, with minimal overpotentials for both the hydrogen evolution reaction (HER 119/217 mV) and the oxygen evolution reaction (OER 210/280 mV) at 20 and 50 mA cm−2, respectively, in an alkaline environment. The water electrolyzer/anion–exchange membrane (AEM) electrolyzer containing Cu-ZnCoS/NF as both cathode and anode operate at a low voltage of 1.51 V/1.88 V, respectively, for several hours. The density functional theory (DFT) and electrochemical tests reveal that modulation of the electronic structure optimizes intermediate adsorption energy, enhances electroactive centers, and facilitates charge transfer of the water-splitting process. These findings pave the way for exploring similar catalysts as robust electrocatalysts for practical electrolyzer devices.

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来源期刊
CiteScore
26.00
自引率
21.40%
发文量
185
期刊介绍: Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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