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Thermal and light irradiation effects on the electrocatalytic performance of hemoglobin modified Co3O4-g-C3N4 nanomaterials for the oxygen evolution reaction
Nanoscale ( IF 5.8 ) Pub Date : 2020/03/27 , DOI: 10.1039/d0nr00818d Carlos Leal-Rodríguez 1, 2, 3, 4 , Daily Rodríguez-Padrón 1, 2, 3, 4 , Zeid A. Alothman 5, 6, 7, 8, 9 , Manuel Cano 2, 10, 11, 12, 13 , Juan J. Giner-Casares 2, 10, 11, 12, 13 , Mario J. Muñoz-Batista 4, 14, 15, 16, 17 , Sameh M. Osman 5, 6, 7, 8, 9 , Rafael Luque 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2020/03/27 , DOI: 10.1039/d0nr00818d Carlos Leal-Rodríguez 1, 2, 3, 4 , Daily Rodríguez-Padrón 1, 2, 3, 4 , Zeid A. Alothman 5, 6, 7, 8, 9 , Manuel Cano 2, 10, 11, 12, 13 , Juan J. Giner-Casares 2, 10, 11, 12, 13 , Mario J. Muñoz-Batista 4, 14, 15, 16, 17 , Sameh M. Osman 5, 6, 7, 8, 9 , Rafael Luque 1, 2, 3, 4, 5
Affiliation
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The oxygen evolution reaction (OER) plays a key role in the water splitting process and a high energy conversion efficiency is essential for the definitive advance of hydrogen-based technologies. Unfortunately, the green and sustainable development of electrocatalysts for water oxidation is nowadays a real challenge. Herein, a successful mechanochemical method is proposed for the synthesis of a novel hemoglobin (Hb) modified Co3O4/g-C3N4 composite nanomaterial. The controlled incorporation of cobalt entities as well as Hb functionalization, without affecting the g-C3N4 nanoarchitecture, was evaluated using different physicochemical techniques, such as X-ray diffraction, N2-physisorption, scanning electron microscopy, UV-visible spectroscopy and X-ray photoelectron spectroscopy. The beneficial effect of the resulting ternary bioconjugate together with the influence of the temperature and light irradiation was investigated by electrochemical analysis. At 60 °C and under light exposition, this electrocatalyst requires an overpotential of 370 mV to deliver a current density of 10 mA·cm−2, showing a Tafel slope of 66 mV·dec−1 and outstanding long-term stability for 600 OER cycles. This work paves a way for the controlled fabrication of multidimensional and multifunctional bio-electrocatalysts.
中文翻译：
热和光辐照对血红蛋白修饰的Co3O4-g-C3N4纳米材料对氧释放反应的电催化性能的影响
氧气析出反应（OER）在水分解过程中起着关键作用，而高能转化效率对于氢基技术的最终发展至关重要。不幸的是，用于水氧化的电催化剂的绿色和可持续发展是当今的真正挑战。本文提出了一种成功的机械化学方法，用于合成新型的血红蛋白（Hb）修饰的Co 3 O 4 / gC 3 N 4复合纳米材料。使用不同的物理化学技术（例如X射线衍射，N射线）评估了钴实体的受控结合以及Hb的功能化，而不会影响gC 3 N 4纳米结构。2-物理吸附，扫描电子显微镜，紫外可见光谱和X射线光电子光谱。通过电化学分析研究了所得三元生物共轭物的有益效果以及温度和光辐射的影响。在60°C和光照下，此电催化剂需要370 mV的超电势才能提供10 mA·cm -2的电流密度，表现出66 mV·dec -1的Tafel斜率和出色的600 OER长期稳定性周期。这项工作为控制多维和多功能生物电催化剂的制备铺平了道路。
更新日期：2020-04-17
中文翻译：
热和光辐照对血红蛋白修饰的Co3O4-g-C3N4纳米材料对氧释放反应的电催化性能的影响
氧气析出反应（OER）在水分解过程中起着关键作用，而高能转化效率对于氢基技术的最终发展至关重要。不幸的是，用于水氧化的电催化剂的绿色和可持续发展是当今的真正挑战。本文提出了一种成功的机械化学方法，用于合成新型的血红蛋白（Hb）修饰的Co 3 O 4 / gC 3 N 4复合纳米材料。使用不同的物理化学技术（例如X射线衍射，N射线）评估了钴实体的受控结合以及Hb的功能化，而不会影响gC 3 N 4纳米结构。2-物理吸附，扫描电子显微镜，紫外可见光谱和X射线光电子光谱。通过电化学分析研究了所得三元生物共轭物的有益效果以及温度和光辐射的影响。在60°C和光照下，此电催化剂需要370 mV的超电势才能提供10 mA·cm -2的电流密度，表现出66 mV·dec -1的Tafel斜率和出色的600 OER长期稳定性周期。这项工作为控制多维和多功能生物电催化剂的制备铺平了道路。
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