Izagirre-Etxeberria Usoa, Podlaha Elizabeth J
Department of Chemical Engineering, Northeastern University, Boston, MA, United States.
TECNALIA, Basque Research and Technology Alliance (BTRA), Parque Tecnológico de San Sebastián, San Sebastian, Spain.
Front Chem. 2022 Mar 11;10:806553. doi: 10.3389/fchem.2022.806553. eCollection 2022.
The electrodeposition of Ni-Mo-W alloys and composites with TiO are examined with a rotating Hull cell to better understand the influence of the particle on the deposition composition and morphology. The addition of the TiO particle to the electrolyte and deposit, significantly affected the deposit composition when the electrolyte temperature was 65C. Both Ni and Mo composition in the deposit was enhanced, but not due to higher reaction rates. The enhancement was a result of an apparent inhibition by the hydrogen evolving side reaction. The W partial current density was most significantly inhibited. The deposit morphology changed with the addition of TiO with a reduction of microcracks compared to the particle-free deposit. The results suggest that the adsorption of the hydrogen intermediate from the side reaction is influenced by the particle, hindering hydrogen desorption, and indirectly affects the partial current densities of the nickel, molybdate and tungstate ion reduction and the morphology.
使用旋转赫尔槽对含TiO的Ni-Mo-W合金及复合材料的电沉积进行了研究，以更好地理解颗粒对沉积成分和形态的影响。当电解液温度为65℃时，向电解液和沉积物中添加TiO颗粒会显著影响沉积物成分。沉积物中的Ni和Mo成分均有所增加，但并非由于更高的反应速率。这种增加是析氢副反应明显抑制的结果。W的分电流密度受到的抑制最为显著。与无颗粒沉积物相比，添加TiO后沉积物形态发生了变化，微裂纹减少。结果表明，颗粒影响了副反应中氢中间体的吸附，阻碍了氢的脱附，并间接影响了镍、钼酸盐和钨酸盐离子还原的分电流密度以及形态。
