包覆TiO_(2)保护层抑制磷化镍钴在水中腐蚀  

Corrosion inhibition of nickel⁃cobalt⁃phosphide in water by coating TiO_(2) layer

作　　者：杨博 吕功煊[1] 马建泰[3] YANG Bo;LÜGongxuan;MA Jiantai(State Key Laboratory for Oxo Synthesis and Selective Oxidation,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]中国科学院兰州化学物理研究所,羰基合成与选择氧化国家重点实验室,兰州730000 [2]中国科学院大学,北京100049 [3]兰州大学化学化工学院,兰州730000

出　　处：《无机化学学报》2025年第2期365-384,共20页Chinese Journal of Inorganic Chemistry

基　　金：科技部重点研发项目(No.2022YFB3803600);国家自然科学基金(No.22272189,22102200)资助。

摘　　要：本工作研究了镍钴双金属磷化物(Ni-Co-P)在水溶液中的稳定性。结果显示,Ni-Co-P能与H_(2)O反应,发生自腐蚀生成Ni^(2+)、Co^(2+)和PO43-离子,同时产生H_(2)。Ni-Co-P与H_(2)O的自腐蚀反应速率受到镍钴比例影响,Ni-Co-P中的Co含量升高,其在水中的腐蚀速率降低。详细研究了镍、钴投料比(nNi/nCo)为1∶2制备的Ni-Co-P在水中的腐蚀行为,其在水中的腐蚀速率与溶液pH值、氧气含量、光照、温度等因素有关。为了抑制Ni-Co-P(nNi/nCo=1/2)在水溶液中的腐蚀,在其表面包裹一层惰性TiO2保护层,这层TiO2保护层能有效减缓Ni-Co-P在水中的腐蚀,增强其稳定性。This work studied the corrosion and corrosion inhibition of nickel-cobalt bimetallic phosphide(Ni-Co-P)in aqueous solution.The results show that Ni-Co-P could react with H_(2)O to produce H_(2),while Ni^(2+),Co^(2+),and PO43-ions were released into water.The nickel-to-cobalt ratio affects the reaction rate of Ni-Co-P with H_(2)O,and increased Co content in Ni-Co-P leads to decreased corrosion rate.The influence factors,such as pH value,oxygen content,light,and temperature on the corrosion of Ni-Co-P(n_(Ni)/n_(Co)=1/2)prepared with an initial nickel-to-cobalt ratio of 1∶2 in water were studied in detail.To inhibit the corrosion of Ni-Co-P(nNi/nCo=1/2)in aqueous solution,a strategy of coating an inert TiO2 protective layer was put forward.The TiO2 protective layer could effectively reduce the corrosion of Ni-Co-P in water and enhance its stability.

关 键 词：双金属磷化物 水溶液 稳定性 TiO2保护层 

分 类 号：O643.36[理学—物理化学]