In this study, platinum catalysts were prepared from cosputtered platinum-aluminum alloys by dealloying method and utilized in hydrogen generation from ammonia borane. Aluminum was selectively removed from the alloy by sodium hydroxide. The resultant platinum particles obtained after dealloying was found to have nanoporous structure. The effect of Al sputtering power on hydrogen generation performance of particles was evaluated. The catalysts were characterized by SEM, TEM, and Zeta-Sizer. The maximum hydrogen generation rate of the catalysts was measured as 82.8 (± 2.2) L H₂ min⁻¹ g⁻¹_catalyst. The effect of catalyst amount was also evaluated. The activation energy of the reaction was calculated as 20.4 (± 0.8) kJ mol⁻¹. Furthermore, the catalysts could preserve their catalytic activity upon consecutive runs with effective washing steps.

中文翻译：

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化学脱合金铂纳米颗粒从氨硼烷中制氢

在这项研究中，铂催化剂是通过脱合金法从共溅射的铂铝合金中制备的，并用于从氨硼烷中制氢。用氢氧化钠选择性地从合金中除去铝。发现脱合金后获得的所得铂颗粒具有纳米孔结构。评估了Al溅射功率对颗粒氢产生性能的影响。用SEM，TEM和Zeta-Sizer对催化剂进行了表征。催化剂的最大氢气产生速率经测量为82.8（±2.2）LH ₂ min ^-1  g ^-1_催化剂。还评估了催化剂量的影响。计算出反应的活化能为20.4（±0.8）kJ mol ^-1。此外，在有效的洗涤步骤的连续运行中，催化剂可以保持其催化活性。