燃料電池偕同光電-芬頓反應機制，具陽極產電、陰極淨化汙廢水暨自保持機制，光觸媒材料可促進光電-芬頓系統之光催化效果。而電極性能為影響系統效能之關鍵因素；二氧化鈦(TiO₂)及二氧化鈰(CeO₂)分別具備良好光催化活性及電荷轉移特性，可形成光偕同電機制以提升電極催化及耐腐蝕性能。本研究設置不同莫耳比參數製備TiO₂/CeO₂/SS316L複合電極，探討Ce/Ti莫耳比參數於系統之影響。結果顯示，以Ce/Ti莫耳比0.25所構成TiO₂/CeO₂異質結，具備良好親水性、電化學性能及光吸收強度，且以此參數所製備TiO₂/CeO₂/SS316L複合電極獲得最低腐蝕電流密度8.5 nA/cm²。以Ce/Ti莫耳比0.25製備TiO₂/CeO₂/SS316L複合電極，陰極系統降解速率相較SS316L提升2.4倍。顯示CeO₂/TiO₂異質結可建構良好之光催化效能，促進光偕同電催化效率及耐腐蝕性獲得顯著優化。

The fuel cell combined with the photo electro-Fenton system can construct the function of anode electricity production, cathode sewage purification and self-circulation mechanism, photocatalyst can promote the photocatalytic effect of the photo-electro-Fenton system. The electrode performance is the key factor which affects the system efficiency. Titanium dioxide (TiO₂) and cerium dioxide (CeO₂) possess good photocatalytic active and charger transfer property, respectively, it can form the photo-syn-electrocatalytic mechanism by compositing TiO₂ and CeO₂, which improves the electrode catalysis and corrosion resistance of the electrode simultaneously. In this study, TiO₂/CeO₂/SS316L composite electrode by electrophoretic deposition and adjusted the molar ratio parameters furtherly, exploring the influence of the parameters in the system. The results demonstrated that the TiO₂/CeO₂/SS316L electrode has the highest current response, charge trapping and intensity of UV light absorption when the Ce/Ti molar ratio is 0.25. Moreover, the corrosion current density decreases to 8.5 nA/cm², while the system degradation rate is 2.4 times higher than that of the untreated SS316L. This showing that the CeO₂/TiO₂ heterojunction can construct good photocatalytic efficiency, and significantly optimize the efficiency and corrosion resistance of the photo-syn-electrocatalytic system.