A Ni-based catalyst with enhanced Ni–support interaction for highly efficient CO methanation†,Catalysis Science & Technology

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A Ni-based catalyst with enhanced Ni–support interaction for highly efficient CO methanation†
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-04-30 00:00:00 , DOI: 10.1039/c8cy00605a
Xiaoliang Yan _{1,

2,

3,

4} , Chen Yuan _{1,

2,

3,

4} , Jiehua Bao _{1,

2,

3,

4} , Sha Li _{1,

2,

3,

4} , Daizong Qi _{4,

5,

6,

7,

8} , Qianqian Wang _{4,

5,

6,

7,

8} , Binran Zhao _{4,

9,

10,

11} , Tong Hu _{1,

2,

3,

4} , Liming Fan _{1,

2,

3,

4} , Binbin Fan _{1,

2,

3,

4} , Ruifeng Li _{1,

2,

3,

4} , Franklin (Feng) Tao _{12,

13,

14,

15} , Yun-Xiang Pan _{4,

5,

6,

7,

8}

Affiliation

Sophisticated manipulation of the metal–support interaction of catalysts is of great importance for achieving a higher catalytic efficiency, but remains as an open challenge. Herein, by using a simple metal–organic framework (MOF) based strategy, a Ni/NiAl₂O₄–M catalyst with an enhanced Ni–support interaction is successfully fabricated. The catalyst exhibits an enhanced low-temperature catalytic performance in CO methanation. CO conversion and CH₄ selectivity as high as 99.8% and 58.0%, respectively, are achieved on the Ni/NiAl₂O₄–M catalyst at 350 °C. The strong Ni–support interaction on the Ni/NiAl₂O₄–M catalyst results in more active H atoms, and promotes the formation of active CH* species which are the key intermediates for CO methanation. This not only enhances the conversion of CO into CH₄, but also suppresses the carbon deposition which has a negative effect on the catalytic reactions, thus improving the catalytic performance of Ni/NiAl₂O₄–M. Besides, the strong Ni–support interaction makes Ni/NiAl₂O₄–M highly resistant to sintering of the Ni nanoparticles during the catalytic reactions. The findings of the present work are helpful for fabricating catalysts with enhanced metal–support interaction for more efficient catalysis.

中文翻译：

具有增强的Ni-载体相互作用的Ni基催化剂，可实现高效的CO甲烷化†

对催化剂的金属-载体相互作用的精密操作对于实现更高的催化效率非常重要，但这仍然是一个开放的挑战。在本文中，通过使用基于简单金属-有机骨架（MOF）的策略，成功制造了具有增强的Ni-载体相互作用的Ni / NiAl ₂ O ₄ -M催化剂。该催化剂在CO甲烷化中表现出增强的低温催化性能。在350°C的Ni / NiAl ₂ O ₄ –M催化剂上，CO转化率和CH ₄选择性分别高达99.8％和58.0％。Ni / NiAl ₂ O ₄上强烈的Ni-载体相互作用-M催化剂产生更多的活性H原子，并促进形成活性CH *物种，这些物种是CO甲烷化的关键中间体。这不仅提高了CO到CH ₄的转化率，而且抑制了对催化反应有负面影响的碳沉积，从而提高了Ni / NiAl ₂ O ₄ -M的催化性能。此外，强大的Ni-载体相互作用使Ni / NiAl ₂ O ₄ -M在催化反应过程中对Ni纳米颗粒的烧结具有很高的抵抗力。当前工作的发现有助于制备具有增强的金属-载体相互作用的催化剂，以实现更有效的催化作用。

更新日期：2018-04-30

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