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Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

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Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
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促进二维添加的Ceria纳米片中氧气空隙的形成,以实现高效的进化

Shuaihu Jiang1, Ruya Zhang1, Hongxian Liu1

  • 1Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China.

Journal of the American Chemical Society
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PubMed
概括

研究人员开发了低成本的二维配合的纳米片,通过水分解有效地生产. 这些催化剂在性条件下优于, 为经济提供了持久的替代品.

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科学领域:

  • 材料科学
  • 电化学
  • 催化剂

背景情况:

  • 过渡到经济需要有效和负担得起的生产方法.
  • 开发便宜,丰富,活跃和持久的催化剂对于电催化演化反应 (HER) 是至关重要的.

研究的目的:

  • 为增强电催化演变而用添加的新型二维 (2D) 纳米板进行合成和表征.
  • 在性介质中研究这些2D Co-doped CeO2纳米片的催化性能和耐久性.

主要方法:

  • 通过CeCO3OH的热分解剥离合成二维纳米片.
  • 使用来引入氧气空隙和活跃点.
  • 在溶液中对演化反应 (HER) 进行电催化试验.

主要成果:

  • 2D Co- doped CeO2纳米片显示出优异的 HER 催化活性,在电流密度分别为 100 mA cm-2 和 500 mA cm-2 时达到 132 mV 和 215 mV 的低超电位.
  • 在性HER中, 化纳米片的性能优于基催化剂.
  • 催化剂表现出了显著的耐用性,在长时间运行中活动损失微不足道.

结论:

  • 2D Co-doped CeO2纳米片是从水分裂中生产的高效和耐用电催化剂.
  • 通过氧气空隙优化结和水解离,可增强催化活性.
  • 这些材料为经济提供了对贵金属催化剂有希望的,具有成本效益的替代品.