Improving HER activity and stability of Pt nanoparticle on Triazine graphitic nanoplatelets

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability Pub Date : 2024-09-21 DOI:10.1016/j.mtsust.2024.100984

Se Jung Lee , Jong-Beom Baek , In-Yup Jeon

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Abstract

Triazine graphitic nanoplatelets (TGNP) were synthesized as an anchor to improve the activity and stability of Pt nanoparticles for the hydrogen evolution reaction (HER). Pt@TGNP, Pt supported on TGNP, showed high performance (i.e., high activity and stability) for HER under acidic conditions. Although Pt@TGNP contained very low Pt content (8.7 wt%), it exhibited much better activity (overpotential: 32 mV, Tafel slope: 28.4 mV dec⁻¹) and stability (overpotential increase: 1.6 mV) for HER, compared with Pt/C (overpotential: 35 mV, Tafel slope: 29.2 mV dec⁻¹, and overpotential increase: 6.2 mV). The results convincingly demonstrate that the triazine units of TGNP offer active sites that increase catalytic activity, as well as anchoring sites to prevent the aggregation of Pt nanoparticles. Results confirmed that Pt@TGNP with its efficient catalytic activity and stability is a promising alternative to existing Pt-based catalysts, and TGNP with triazine is highly likely to be utilized as a catalyst support in various applications.

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提高三嗪石墨纳米片上铂纳米粒子的 HER 活性和稳定性

合成了三嗪石墨纳米颗粒（TGNP）作为锚，以提高铂纳米颗粒在氢进化反应（HER）中的活性和稳定性。在酸性条件下，Pt@TGNP（铂支撑在 TGNP 上）在氢演化反应中表现出高性能（即高活性和高稳定性）。虽然 Pt@TGNP 的铂含量很低（8.7 wt%），但与 Pt/C（过电位：35 mV，Tafel 斜坡：29.2 mV dec-1，过电位增加：1.6 mV）相比，它在 HER 方面表现出更好的活性（过电位：32 mV，Tafel 斜坡：28.4 mV dec-1）和稳定性（过电位增加：1.6 mV）：6.2 mV）。这些结果令人信服地证明，TGNP 的三嗪单元提供了可提高催化活性的活性位点，以及防止铂纳米粒子聚集的锚定位点。研究结果证实，Pt@TGNP 具有高效的催化活性和稳定性，是现有铂基催化剂的理想替代品。

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来源期刊

Materials Today Sustainability Multiple-

CiteScore

5.80

自引率

6.40%

发文量

174

审稿时长

32 days

期刊介绍： Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science. With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.