In this work, δMnO₂ was anchored into graphene nanosheets via a mediated simple and eco-friendly approach to be used as a potential low-cost cathodic catalyst in microbial desalination cells (MDC). MnO₂/G based MDC revealed a faster start-up and stable performance during the operation compared with the catalyst-free control MDC. The average chemical oxygen demand (COD) removal efficiencies were 85.11 ± 5.13 and 86.20 ± 4.85% and average columbic efficiencies throughout the operation cycles were 1.52 ± 0.32% and 0.70 ± 0.35% for MnO₂/G based reactor and control reactor, respectively. The average desalination efficiencies were 15.67 ± 3.32 and 13.21 ± 2.61% for MnO₂/G based reactor and control reactor, respectively. The superior catalytic performance of MnO₂/G based cathode improved current generation which is the key desalination stimulus. MnO₂/G based reactor revealed a lower internal resistance of 430 Ω compared with 485 Ω for the catalyst-free control reactor and, similarly, the maximum power densities were found to be 12.5 and 6.5 mW/m², respectively. MnO₂/G catalyst offered an improved MDC performance, however, still with uncompetitive performance in comparison with platinum group metals catalysts.

在这项工作中，δ的MnO ₂被经由介导的简单锚定到石墨烯纳米薄片和生态友好的方式来被用作微生物脱盐电池（MDC）的电势低成本的阴极催化剂。与无催化剂的对照MDC相比，基于MnO ₂ / G的MDC在运行过程中显示出更快的启动和稳定的性能。对于基于MnO ₂ / G的反应器和控制反应器，在整个操作周期中，平均化学需氧量（COD）去除效率分别为1.52±0.32％和0.70±0.35％，而整个操作效率为9.52±4.85％。MnO ₂的平均脱盐效率为15.67±3.32和13.21±2.61％基于/ G的反应堆和控制反应堆。MnO ₂ / G基阴极的优异催化性能改善了电流产生，这是关键的淡化刺激。基于MnO ₂ / G的反应器显示出430Ω的内部电阻，而无催化剂的控制反应器的内部电阻为485Ω，同样，最大功率密度分别为12.5和6.5 mW / m ²。MnO ₂ / G催化剂提供了改进的MDC性能，但是，与铂族金属催化剂相比，它的性能仍然没有竞争力。