Для цитирования:
Gamayunova I. M. The influence of impurities of the transition metals Fe, Ni, and Co on hydrolysis kinetics of BH4 ions in alkaline solutions [Гамаюнова И. М. Влияние примесей переходных металлов Fe, Ni и Co на кинетику гидролиза BH4-ионов в щелочных растворах] // Электрохимическая энергетика. 2021. Т. 21, вып. 3. С. 164-170. DOI: 10.18500/1608-4039-2021-21-3-164-170, EDN: DNPBZI
The influence of impurities of the transition metals Fe, Ni, and Co on hydrolysis kinetics of BH4 ions in alkaline solutions
[Влияние примесей переходных металлов Fe, Ni и Co на кинетику гидролиза BH4-ионов в щелочных растворах]
Исследовалось влияние небольших количеств примесей Fe, Co и Ni на самопроизвольный процесс гидролиза борогидрида в интервале температур 60–100°C. Исследуемый объект представлял собой модельный раствор, содержащий 9.53 М OH- ионов и 0.14 М BH4- ионов и используемый в качестве топлива для борогидридных топливных элементов. Оценена константа скорости гидролиза борогидрида k для небольшого количества примесей при разных температурах. Установлены самые низкие не ускоряющие гидролиз концентрации примесей ( ? 10 ppm для железа; ? 1 ppm для кобальта). Наибольшее ускоряющее действие на гидролиз BH4?-ионов оказали примеси никеля: самогидролиз ускорился в 1.2 раза для 1 ppm Ni. Неоднозначный ход кинетических кривых не позволяет точно оценить энергию активации, однако увеличение температуры усиливает каталитический эффект ускорения гидролиза в полном соответствии с уравнением Аррениуса.
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