Influence of moo42 - on the codeposition mechanism and magnetic properties of cobalt - molybdenum thin films 共沉積機制及薄膜磁性能影響
Lifepo4 was sintered by solid - state method , we found that the capacity of the sample which was synthesized by codeposition method exhibited high specific capacity ( 142 mah ? g - 1 ) and good cycling performance 采用高溫固相法制備了lifepo4 ,發(fā)現(xiàn)共沉淀制備的前驅(qū)體燒結(jié)出的材料容量達到142mah ? g - 1 ,循環(huán)性能也很好。
Presence of vulcan xc - 72 active carbon powder in the pt / moox / gc composite electrode by electrochemical codeposition made peak potential of methanol oxidation a further negative shift of about 50mv and a further promotion of co - tolerant performance for methanol oxidation 催化劑中vulcanxc - 72活性碳粉的引入即共沉積制備的pt moo _ x c gc電極催化劑甲醇氧化峰電位又進一步負移50mv左右,抗co中毒催化性能又進一步提高。
Deposition mechanism of electroless plating tin in acid chloride solutions was analyzed theoretically , and three steps were summed up , including period of replacement reaction , coexistence periods of copper - tin codeposition and self - catalyzed deposition , and period of self - catalyzed deposition 從理論上系統(tǒng)地分析了酸性氯化物化學(xué)鍍錫的沉積機理,將其歸納為置換反應(yīng)期、銅錫共沉積與自催化沉積共存期和自催化沉積期三個階段。
In this thesis , in order to reducing the amount of the pt catalyst , improving the electrocatalytic activity of the pt catalysts and utilization ratio of pt , the electrochemical codeposition method by cyclic voltammetry ( cv ) was used to prepare a series pt / moox / glassy carbon ( gc ) composite electrodes with high dispersibility . the composite electrode , pt / moox / gc , was characterized to study its composition and its electro chemical behavior by cv . using the xrd and sem techniques , the size and the dispersion degree of the catalyst particles were studied in presence or absence of moox in the catalyst 為了降低主催化劑pt的用量、提高pt的活性和利用率,本論文利用循環(huán)伏安法共沉積制備高分散的pt moo _ x催化劑顆粒,利用循環(huán)伏安電化學(xué)表征、 xrd和sem技術(shù)研究了引入moo _ x后的催化劑即pt moo _ x顆粒的粒子大小、分散狀態(tài);利用icp - aes定量分析pt moo _ x催化劑顆粒的組成含量;并借助于電化學(xué)方法分別評價了pt moo _ x gc電極催化劑的對甲醇的電催化活性和穩(wěn)定性、氧還原電催化活性。