鈷粒子強化碳化鎢電極於生物–電–芬頓燃料電池性質及腐蝕性研究

Electrical properties and corrosion research of Cobalt particle strengthen tungsten carbide electrode in EMFC

微生物燃料電池（Microbial Fuel Cell MFC）為新一代能源技術，其生物–電–芬頓（Electro Fenton Microbial Fuel Cell EMFC）技術能有效處理汙水並兼具產電功能；碳化鎢及鈷材料為金屬結晶材料，相較於傳統碳基材料其具有良好導電性及耐蝕性。本研究藉由2 5μm不同粒徑大小之鈷元素進行陽極碳化鎢材料表面處理，實驗包括電化學極化特性、功率密度、腐蝕塔弗曲線、親水性量測、金相剖面觀察及陰極RB5染料脫色降解分析顯示在系統電性方面2μm鈷強化之極板具有最佳電性表現其開路電壓為0.60 V，最大電流密度為2,275.5 mA/m2，最大功率密度為323.5 mW/m2；在腐蝕電流部分，鈷粒子強化碳化鎢材料後，其腐蝕電流從1.90×10-5 A下降至1.55×10-5 A。初步顯示，鈷粒子強化碳化鎢材料之極板在生物-電-芬頓燃料電池初具電性提升及腐蝕速率下降效果。

Microbial fuel cell (MFC) is a new generation of energy technology. Electro Fenton Microbial Fuel Cell (EMFC) technology can effectively deal with sewage and provide electricity production function. The tungsten carbide and cobalt materials metallic crystalline material compared to traditional carbon substrate, which has good electrical conductivity and anti-corrosion. In this research, tungsten carbide anode coated with cobalt particle (2~5μm) was study. Experiments include electrochemical polarization characteristics, power density, corrosionTafel curve, contact angle measurement, metallographic cross-sectional observation and cathode RB5 dye decolorization and degradation analysis. The results show that in terms of electrical power system, 2μm cobalt strengthening electrode plate have the best electrical performance, the open circuit voltage of 0.60V, a maximum current density of 2,275.5mA/m2, the maximum power density of 323.5mW /m2. Tungsten carbide material after cobalt particle strengthening showing that the corrosion current decreased from 1.90 × 10-5A to 1.55 × 10-5A. This result indicates that cobalt particles strengthen tungsten carbide electrode plate in EMFC have the advantages of electric system elevation and corrosion rate decreasing.