采用快速电沉积法制备了成分均匀、形貌均一且具有高析氧活性和耐久性的"海胆状"Fe-Cu-Ni多元合金.在0.1 mol/L KOH溶液中该多元合金催化剂具有较高的反应动力学速率和反应活性,其析氧过电位为230m V,塔菲尔斜率为99.9 m V/d...采用快速电沉积法制备了成分均匀、形貌均一且具有高析氧活性和耐久性的"海胆状"Fe-Cu-Ni多元合金.在0.1 mol/L KOH溶液中该多元合金催化剂具有较高的反应动力学速率和反应活性,其析氧过电位为230m V,塔菲尔斜率为99.9 m V/dec,活性为3.781 m A/cm~2.同时,经长时间I-t耐久性测试发现,该合金在经过25 000 s循环后,其活性仍可保持在0.507 m A/cm~2.该研究可为析氧三元合金催化剂的制备调控提供可借鉴的理论和实验依据.展开更多
The isothermal section of the Fe-Cu-Ni ternary system at 1173 K was determined by microprobe analysis and diffusion triple technique. The experimental results show that this isothermal section only contains a miscibil...The isothermal section of the Fe-Cu-Ni ternary system at 1173 K was determined by microprobe analysis and diffusion triple technique. The experimental results show that this isothermal section only contains a miscibility gap region,and the maximal Ni content in the miscibility gap is 44.7 at.-%Ni.展开更多
文摘采用快速电沉积法制备了成分均匀、形貌均一且具有高析氧活性和耐久性的"海胆状"Fe-Cu-Ni多元合金.在0.1 mol/L KOH溶液中该多元合金催化剂具有较高的反应动力学速率和反应活性,其析氧过电位为230m V,塔菲尔斜率为99.9 m V/dec,活性为3.781 m A/cm~2.同时,经长时间I-t耐久性测试发现,该合金在经过25 000 s循环后,其活性仍可保持在0.507 m A/cm~2.该研究可为析氧三元合金催化剂的制备调控提供可借鉴的理论和实验依据.
文摘The isothermal section of the Fe-Cu-Ni ternary system at 1173 K was determined by microprobe analysis and diffusion triple technique. The experimental results show that this isothermal section only contains a miscibility gap region,and the maximal Ni content in the miscibility gap is 44.7 at.-%Ni.