Iron Quantum Dots Electro-Assembling on Vulcan XC-72R: Hydrogen Peroxide Generation for Space Applications
Iron Quantum Dots Electro-Assembling on Vulcan XC-72R: Hydrogen Peroxide Generation for Space Applications
复制标题
Vulcan XC-72R 上的铁量子点电组装：用于空间应用的过氧化氢生成
DOI：
10.1021/acsami.1c05649
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发表时间：
2021
影响因子：
9.5
通讯作者：
Cabrera, Carlos R.
中科院分区：
文献类型：
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作者：
Peña-Duarte, Armando;Vijapur, Santosh H.;Hall, Timothy D.;Hayes, Kathleen L.;Larios-Rodríguez, Eduardo;Pilar-Albaladejo, Joselyn Del;Santiago, Mitk’El B.;Snyder, Stephen;Taylor, Jennings;Cabrera, Carlos R.
采用旋转圆盘浆料电沉积（RoDSE）技术在粉末状Vulcan XC-72 R基底上成功制备了高度分散的铁基量子点。我们的研究结果通过化学物理表征揭示了界面金属-碳之间的连续电子通路相互作用是受控的。利用旋转环盘电极（RRDE）和原型发生单元（PGU）原位生成H2 O2的燃料电池实验表明，该反应具有高的双电子氧还原活性。这些结果确立了Fe/Vulcan催化剂在空间和地面新材料载体，特别是在原位H2 O2生产的竞争力水平。透射电子显微镜（TEM）分析表明，分散良好的铁基量子点的粒径为4 nm。通过诱导耦合等离子体发射光谱（ICP-OES）、透射扫描电子显微镜（STEM）、X射线衍射（XRD）、拉曼光谱、X射线光电子能谱（XPS）和X射线吸收光谱（XAS）对量子点的结构和化学物理特性进行表征，结果表明，在大气条件下，量子点体系为Fe 2 +/3+/Fe 3+组合。量子点的氧化态可调性通过外加电位来表现。在国际空间站（ISS）可用的饮用水资源的相容性条件下获得H2 O2，增强了这种铁基和碳基材料在未来空间情景中原位H2 O2生产的适用性。陆地和空间丰富的铁和碳，结合其低毒性和高稳定性，巩固了目前的工作，以进一步扩大大规模生产铁基纳米粒子的几种应用。
Highly dispersed iron-based quantum dots (QDs) onto powdered Vulcan XC-72R substrate were successfully electrodeposited by the rotating disk slurry electrodeposition (RoDSE) technique. Our findings through chemical physics characterization revealed that the continuous electron pathway interaction between the interface metal–carbon is controlled. The rotating ring-disk electrode (RRDE) and the prototype generation unit (PGU) ofin-situH2O2generation in fuel cell experiments revealed a high activity for the oxygen reduction reaction (ORR) via two-electron pathway. These results establish the Fe/Vulcan catalyst at a competitive level for space and terrestrial new materials carriers, specifically for thein-situH2O2production. Transmission electron microscopy (TEM) analysis reveals the well-dispersed Fe-based quantum dots with a particle size of 4 nm. The structural and chemical-physical characterization through induced coupled plasma-optical emission spectroscopy (ICP-OES), transmission scanning electron microscopy (STEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and X-ray absorption spectroscopy (XAS); reveals that, under atmospheric conditions, our quantum dots system is a Fe2+/3+/Fe3+combination. The QDs oxidation state tunability was showed by the applied potential. The obtention of H2O2under the compatibility conditions of the drinking water resources available in the International Space Station (ISS) enhances the applicability of this iron- and carbon-based materials forin-situH2O2production in future space scenarios. Terrestrial and space abundance of iron and carbon, combined with its low toxicity and high stability, consolidates this present work to be further extended for the large-scale production of Fe-based nanoparticles for several applications.