Facile fabrication of Ir/CNT/rGO nanocomposites with enhanced electrocatalytic performance for the hydrogen evolution reaction,Sustainable Energy & Fuels

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Facile fabrication of Ir/CNT/rGO nanocomposites with enhanced electrocatalytic performance for the hydrogen evolution reaction
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-04-30 , DOI: 10.1039/d0se00350f
Bo Huang _{1,

2,

3,

4,

5} , Yuntian Ma _{1,

2,

3,

4,

5} , Zhelun Xiong _{1,

2,

3,

4,

5} , Wangda Lu _{1,

2,

3,

4,

5} , Ran Ding _{1,

2,

3,

4,

5} , Tiantian Li _{1,

2,

3,

4,

5} , Peng Jiang _{1,

2,

3,

4,

5} , Minghui Liang _{1,

2,

3,

4,

5}

Affiliation

Developing high-performance Ir-based catalysts for the hydrogen evolution reaction (HER) is important because of the unique catalytic activity of Ir in this process. An Ir colloidal precursor with the same size distribution of Ir nanoparticles was employed to prepare Ir-based electrocatalysts for the first time and explore the effects of different electrocatalytic supports, including active carbon, rGO, carbon nanotubes (CNTs), and CNT/rGO composites. The results indicate that the metal–support interactions in electronic transfer were not the key factor determining the electrocatalytic performance. Instead, the stability of the interaction between the supports and Ir nanoparticles was the key factor. It is exciting that the as-prepared Ir/CNT/rGO nanocomposite has enhanced properties; the overpotential of Ir/CNT/rGO is 19 mV at η₁₀, and the overpotential is well maintained after 10 000 cycles. This work provides a promising electrocatalyst for HER and reveals the influential factors in electrocatalytic HER.

中文翻译：

易于制造的Ir / CNT / rGO纳米复合材料，具有增强的氢催化电催化性能

由于在此过程中Ir具有独特的催化活性，因此开发用于氢释放反应（HER）的高性能基于Ir的催化剂非常重要。具有相同大小的Ir纳米粒子的Ir胶体前体被首次用于制备Ir基电催化剂，并探索了包括活性炭，rGO，碳纳米管（CNTs）和CNT / rGO复合材料在内的不同电催化载体的作用。。结果表明，电子转移中的金属-载体相互作用不是决定电催化性能的关键因素。相反，载体和Ir纳米颗粒之间相互作用的稳定性是关键因素。令人兴奋的是，所制备的Ir / CNT / rGO纳米复合材料具有增强的性能。Ir / CNT / rGO的超电势在19 mVη ₁₀，和超电势10 000次循环之后是很好的维护。这项工作为HER提供了有希望的电催化剂，并揭示了电催化HER的影响因素。

更新日期：2020-06-30

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