| Fe/Cu修饰氮掺杂碳纳米管的构筑及催化性能 |
| Construction and Catalytic Properties of Fe/Cu Modified Nitrogen-Doped Carbon with Carbon Nanotube |
| 作者 | 单位 | E-mail | | 王支国 | 西安建筑科技大学材料科学与工程学院, 功能材料研究所, 西安 710055 | | | 邓莹莹 | 西安建筑科技大学材料科学与工程学院, 功能材料研究所, 西安 710055 | | | 党姣娥 | 西安建筑科技大学材料科学与工程学院, 功能材料研究所, 西安 710055 | | | 张永伟 | 西安建筑科技大学材料科学与工程学院, 功能材料研究所, 西安 710055 | | | 张丽珊 | 西安建筑科技大学材料科学与工程学院, 功能材料研究所, 西安 710055 | | | 阿鑫 | 青海省高原绿色建筑与生态社区重点实验室, 西宁 810008 | | | 云斯宁 | 西安建筑科技大学材料科学与工程学院, 功能材料研究所, 西安 710055 | yunsining@xauat.edu.cn |
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| 摘要: 通过简单的原位化学合成法结合离子交换法制备了Cu修饰氮掺杂碳（Cu-N-C）和Fe/Cu修饰氮掺杂碳纳米管（Fe/Cu-N-C/CNT），并系统评估了2种催化剂作为染料敏化太阳能电池（dye-sensitized solar cells，DSSCs）对电极在I3-/I-体系中的电化学特性和光伏性能。采用X射线衍射（XRD）、拉曼（Raman）、X射线光电子能谱（XPS）和场发射扫描电镜（FESEM）对合成的催化剂进行组分和形貌表征。结果表明：纳米管状的Fe/Cu-N-C/CNT的石墨化程度比纳米颗粒状的Cu-N-C更高，更有利于I3-还原反应中电荷的传输。光伏性能测试结果表明：基于Fe/Cu-N-C/CNT对电极的DSSCs的光电能量转换效率（power conversion efficiency，PCE）达到7.55%，高于相同测试条件下Cu-N-C（6.99%）和Pt（6.76%）对电极的PCE。50圈连续循环伏安测试结果表明：Fe/Cu-N-C/CNT催化剂具有比Cu-N-C更好的电化学稳定性。 |
| 关键词: 染料敏化太阳能电池 对电极 催化剂 双金属修饰 氮掺杂碳 碳纳米管 |
| 基金项目: 国家自然科学基金（No.51672208）、陕西省国家重点研发计划-国际合作重点项目（No.2019KWZ-03）、陕西省重点科技创新团队（No.2022TD-34）和青海省高原绿色建筑与生态社区重点实验室开放基础项目（No.KLKF-2019-002）资助 |
| Abstract: Cu-modified nitrogen-doped carbon (Cu-N-C) and Fe/Cu-modified nitrogen-doped carbon with carbon nanotube (Fe/Cu-N-C/CNT) catalysts were prepared by in situ chemical synthesis combined with an ion exchange method. As counter electrode in dye-sensitized solar cells (DSSCs), the electrochemical properties and photovoltaic performance of these two catalysts in I3-/I- electrolyte were explored. The structure and morphology of as-prepared catalysts were characterized by X-ray diffraction (XRD), Raman spectra, X-ray photoelectron spectra (XPS), and field emission scanning electron microscope (FESEM). The results showed that the graphitization degree of Fe/Cu-N-C/CNT was higher than that of Cu-N-C, which is more favorable for charge transfer during I3- reduction process. The photovoltaic tests results showed that the DSSCs based on Fe/Cu-N-C/CNT CE achieved a power conversion efficiency (PCE) of 7.55%, higher than Cu-N-C (6.99%) and Pt (6.76%) under the same conditions. 50 cycles continuous cyclic voltammetry scanning showed that Fe/Cu-N-C/CNT had better electrochemical stability than Cu-N-C. This robust behavior can be mainly attributed to the synergistic effect between the bimetallic active sites (Fe/Cu) and the nitrogen-doped carbon network with CNTs, which results in a pronounced decrease in the charge-transfer resistance and superior device stability. |
| Keywords: dye-sensitized solar cells counter electrode catalyst bi-metal modification nitrogen-doped carbon carbon nanotubes |
| 投稿时间：2022-04-07 修订日期：2022-09-20 |
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| 王支国,邓莹莹,党姣娥,张永伟,张丽珊,阿鑫,云斯宁.Fe/Cu修饰氮掺杂碳纳米管的构筑及催化性能[J].无机化学学报,2022,38(11):2181-2190. |
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