Advanced Polymer Laboratory, Department of Polymer Science & Technology, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India.
Department of Civil and Environmental Engineering, Indian Institute of Technology, Patna, Bihar, India.
Mater Sci Eng C Mater Biol Appl. 2020 Mar;108:110498. doi: 10.1016/j.msec.2019.110498. Epub 2019 Nov 28.
In this study, sulfonated graphene oxide (SGO) was synthesized as potential conducting matrix to improve the properties of catalyst for single chamber microbial fuel cells (SC-MFCs). Here, TiO and Polyaniline (PAni) nanoparticles were anchored over SGO and the resulting SGO-TiO-PAni nanocomposites were used as a potential cathode catalyst in MFCs. We have also examined the performance of SGO-TiO-PAni compared to GO-TiO-PAni and TiO-PAni catalyst. The structural and morphological analyses were examined using a variety of characterization techniques. TiO nanoparticles bridged PAni and SGO through hydrogen bonding/electrostatic interaction and improved the thermal stability of SGO-TiO-PAni catalyst. The electrochemical characterizations of these nanocatalysts suggest that the SGO-TiO-PAni showed higher reduction current value (-0.46 mA), enhanced stability, and lower internal resistance (46.2 Ω) in comparison to GO-TiO-PAni and TiO-PAni towards oxygen reduction reactions (ORR). Consequently, MFC using SGO-TiO-PAni demonstrated a maximum power density of 904.18 mWm than that of GO-TiO-PAni (734.12 mWm), TiO-PAni (561.5 mWm) and Pt/C (483.5 mWm). The enhanced catalytic activity of SGO-TiO-PAni catalyst was ascribed to the high electronic conductivity and long-term permanence of the nanocomposite. These superior electrochemical results suggested that the SGO-TiO-PAni catalyst could be applied as a potential alternative to the commercial Pt/C cathode catalyst for the application of MFCs.
在这项研究中，合成了磺化氧化石墨烯（SGO）作为潜在的导电基质，以改善单室微生物燃料电池（SC-MFC）催化剂的性能。在这里，将 TiO 和聚苯胺（PAni）纳米颗粒锚定在 SGO 上，所得的 SGO-TiO-PAni 纳米复合材料被用作 MFC 中潜在的阴极催化剂。我们还研究了 SGO-TiO-PAni 与 GO-TiO-PAni 和 TiO-PAni 催化剂的性能比较。使用各种表征技术对结构和形态进行了分析。TiO 纳米颗粒通过氢键/静电相互作用桥接 PAni 和 SGO，并提高了 SGO-TiO-PAni 催化剂的热稳定性。这些纳米催化剂的电化学特性表明，与 GO-TiO-PAni 和 TiO-PAni 相比，SGO-TiO-PAni 在氧还原反应（ORR）中表现出更高的还原电流值（-0.46 mA）、增强的稳定性和更低的内阻（46.2 Ω）。因此，与使用 GO-TiO-PAni（734.12 mWm）、TiO-PAni（561.5 mWm）和 Pt/C（483.5 mWm）相比，使用 SGO-TiO-PAni 的 MFC 表现出最大的功率密度为 904.18 mWm。SGO-TiO-PAni 催化剂的增强催化活性归因于纳米复合材料的高电子导电性和长期稳定性。这些优越的电化学结果表明，SGO-TiO-PAni 催化剂可以作为商业 Pt/C 阴极催化剂的潜在替代品，用于 MFC 的应用。
