Monometallic (Co) and bimetallic (Co-Ni and Co-Cu) oxides catalysts supported on the almond based activated carbon (AC) were prepared by the heterogeneous deposition-precipitation method. The activity of these catalysts was evaluated as a function of reaction temperature, NaOH, and NaBH₄ concentration. Several analysis methods including XRD, XPS, FTIR, TEM, FESEM, ICP-OES, and BET were applied to characterize the structure of prepared samples. Well-dispersed supported bimetallic nano-catalysts with the size of particles below 20 nm were formed by using nickel and copper oxides as a promoter which was confirmed by XRD and TEM techniques. Surface composition of alloy and core-shell cobalt-nickel oxides catalysts was analyzed by ICP-OES which was in a good agreement with nominal content during catalyst preparation. The performance of bimetallic cobalt-nickel oxides catalysts indicated the synergic effect between cobalt and nickel in comparison with monometallic and bimetallic cobalt-copper samples for hydrogen production. Maximum hydrogen generation rate was measured for the supported core-shell catalyst as named Ni1/Co3/AC. The reaction rate increased with increasing the temperature of the alkaline solution as a significant parameter while other operating conditions were kept constant. The optimal values for NaOH and NaBH₄ content were calculated to be 10 wt % for both variables at 30 °C. Hydrogen production rates were calculated to be 252.0, 310.8 and 658.8 mL min⁻¹.g⁻¹ by applying Co3/Ni1/AC, Co3-Ni1/AC (alloy) and Ni1/Co3/AC at 30 °C in 5 wt % NaBH₄ and 5 wt % NaOH solutions, respectively. Obtained activation energy (50 kJ mol⁻¹) illustrated that the suitable catalysts were synthesized for hydrogen generation. The experimental study showed that the hydrolysis of NaBH₄ was a zero-order type reaction with the respect to the sodium borohydride concentration. A semi empirical kinetic model was derived at the various temperatures and NaOH concentrations.

通过非均相沉积-沉淀法制备了负载在杏仁基活性炭（AC）上的单金属（Co）和双金属（Co-Ni和Co-Cu）氧化物催化剂。评估这些催化剂的活性与反应温度，NaOH和NaBH _4的关系专注。几种分析方法，包括XRD，XPS，FTIR，TEM，FESEM，ICP-OES和BET被用于表征所制备样品的结构。通过使用镍和铜的氧化物作为助催化剂，形成了粒径小于20 nm的分散良好的负载型双金属纳米催化剂。通过ICP-OES分析了合金和核-壳型钴-镍氧化物催化剂的表面组成，与催化剂制备过程中的标称含量非常吻合。双金属钴-镍氧化物催化剂的性能表明，与用于制氢的单金属和双金属钴-铜样品相比，钴和镍之间具有协同作用。测量了负载的核壳催化剂Ni1 / Co3 / AC的最大氢生成速率。反应速率随着碱溶液温度的升高而增加，这是一个重要的参数，而其他操作条件则保持不变。NaOH和NaBH的最佳值对于30℃下的两个变量，计算出₄含量为10wt％。氢生产速率分别计算为252.0，310.8和658.8毫升分钟^-1 ·G ^-1通过在5％（重量）的Co施加/ NI1 / AC，CO 3 NI1 / AC（合金）和NI1 /的Co / AC在30℃下NaBH ₄和5 wt％NaOH溶液。获得的活化能（50kJ mol ^-1）说明合成了合适的催化剂用于产生氢。实验研究表明，相对于硼氢化钠浓度，NaBH ₄的水解是零级反应。在不同的温度和NaOH浓度下得出了半经验动力学模型。