Ru–Fe nanoalloys supported on N-doped carbon as efficient catalysts for hydrogen generation from ammonia borane,Sustainable Energy & Fuels

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Ru–Fe nanoalloys supported on N-doped carbon as efficient catalysts for hydrogen generation from ammonia borane
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-05-06 , DOI: 10.1039/d0se00660b
Daijuan Zhou _{1,

2,

3,

4,

5} , Xiaoyan Huang _{1,

2,

3,

4,

5} , Hao Wen _{1,

2,

3,

4,

5} , Ruofan Shen _{1,

2,

3,

4,

5} , Yanyan Liu _{1,

2,

3,

4,

5} , Xianji Guo _{1,

2,

3,

4,

5} , Baojun Li _{1,

2,

3,

4,

5}

Affiliation

Hydrogen is a potential clean energy carrier for renewable energy sources. The development of high-efficiency and economical catalysts for hydrogen generation is of great importance. In this work, highly dispersed RuFe alloys were prepared and anchored on the surface of microsphere-type N-doped carbon through a facile impregnation-co-reduction process. The spherical N-doped carbon derived from a resorcinol–formaldehyde resin effectively promoted the surface dispersion of the RuFe alloys and the distribution of catalytic active sites on the support surface. According to the density functional theory simulation, the significant positive synergistic effect originated from the coexistence of Ru and Fe in the alloy and effectively reduced the reaction energy barrier. The alloys with various Ru/Fe ratios were more catalytically active for ammonia borane hydrolysis than their supported single Ru or Fe counterparts. This alloy strategy also effectively improved the utilization ratio and stability of Ru. With the optimized Ru₂Fe₁/N–C catalyst, an unprecedented hydrogen generation specific rate of 9.4 × 10⁴ mL min⁻¹ g_Ru⁻¹ was achieved at 298 K. The catalytic activity tended to be stable after five consecutive uses. This work provides a beneficial reference for the design of high-efficiency catalysts for hydrogen generation.

中文翻译：

含铁掺杂碳的Ru-Fe纳米合金可作为有效的催化剂，以氨硼烷为原料制氢

氢气是可再生能源的潜在清洁能源载体。开发高效，经济的制氢催化剂非常重要。在这项工作中，制备了高度分散的RuFe合金，并通过一种容易的浸渍-共还原工艺将其固定在微球型N掺杂碳的表面上。源自间苯二酚-甲醛树脂的球形N掺杂碳有效地促进了RuFe合金的表面分散和催化活性位在载体表面的分布。根据密度泛函理论模拟，显着的正协同作用源于合金中Ru和Fe的共存，有效降低了反应能垒。具有各种Ru / Fe比的合金比其负载的单个Ru或Fe对应物对氨硼烷的催化活性更高。该合金策略还有效地提高了Ru的利用率和稳定性。通过优化的Ru₂ Fe₁ / N-C催化剂在298 K时达到了前所未有的氢气产生比速率9.4×10⁴ mL min^-1 g_Ru^-1。在连续使用五次后，催化活性趋于稳定。这项工作为设计高效的制氢催化剂提供了有益的参考。

更新日期：2020-06-30

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