Hydrogen generation under mild conditions is a promising strategy and longstanding challenge for the development of novel clean energy resources. Most current systems involve organic/inorganic hydrides that are catalyzed in basic media and have to release the carbon oxides (CO or CO₂). Herein, we describe an alternative pathway for highly efficient production of pure H₂ (0.073 mmol g_Fe⁻¹ min⁻¹) through a redox reaction between water and Fe nanoparticles at room temperature catalyzed by Pd without the activation of light or electricity. Experimental results prove that the small size of Fe nanoparticles and the catalysis of Pd supported on its surface play a key role in the successful generation of hydrogen. With the catalysis of Pd, the reaction activation energy can be obviously reduced, which is beneficial for the enhanced hydrogen generation rate. The hydrogen can also be successfully released from the water and Fe nanoparticle system even at 0 °C reaction temperature, indicating its broad scope of application. Meanwhile, the remnants of the hydrogen generation system are Pd/Fe₂O₃ nanoparticles, which are useful and recyclable heterogeneous catalysts for various organic reactions.

中文翻译：

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Pd †催化水和纳米Fe产生室温氢

在温和条件下制氢是开发新型清洁能源的一种有前途的策略，也是长期的挑战。当前大多数系统涉及在碱性介质中催化并必须释放碳氧化物（CO或CO ₂）的有机/无机氢化物。本文中，我们描述了高效生产纯H ₂（0.073 mmol g _Fe ^-1 min ^-1的替代途径）是在室温下水和Fe纳米粒子之间在Pd催化下进行的氧化还原反应，而没有光或电的激活。实验结果证明，Fe纳米粒子的小尺寸及其表面负载的Pd的催化作用对氢的成功生成起着关键作用。通过Pd的催化作用，可以明显降低反应活化能，有利于提高产氢率。即使在0°C反应温度下，氢也可以成功地从水和铁纳米颗粒系统中释放出来，这表明其应用范围很广。同时，制氢系统的残留物是Pd / Fe ₂ O ₃ 纳米颗粒，对于各种有机反应而言都是有用且可回收的非均相催化剂。