Rationally designed Ru catalysts supported on TiN for highly efficient and stable hydrogen evolution in alkaline conditions

IF 14.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Nature Communications Pub Date : 2024-07-29 DOI:10.1038/s41467-024-50691-5

Jia Zhao, Ricardo Urrego-Ortiz, Nan Liao, Federico Calle-Vallejo, Jingshan Luo

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Abstract

Electrocatalysis holds the key to enhancing the efficiency and cost-effectiveness of water splitting devices, thereby contributing to the advancement of hydrogen as a clean, sustainable energy carrier. This study focuses on the rational design of Ru nanoparticle catalysts supported on TiN (Ru NPs/TiN) for the hydrogen evolution reaction in alkaline conditions. The as designed catalysts exhibit a high mass activity of 20 A mg⁻¹_Ru at an overpotential of 63 mV and long-term stability, surpassing the present benchmarks for commercial electrolyzers. Structural analysis highlights the effective modification of the Ru nanoparticle properties by the TiN substrate, while density functional theory calculations indicate strong adhesion of Ru particles to TiN substrates and advantageous modulation of hydrogen adsorption energies via particle-support interactions. Finally, we assemble an anion exchange membrane electrolyzer using the Ru NPs/TiN as the hydrogen evolution reaction catalyst, which operates at 5 A cm⁻² for more than 1000 h with negligible degradation, exceeding the performance requirements for commercial electrolyzers. Our findings contribute to the design of efficient catalysts for water splitting by exploiting particle-support interactions.

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合理设计以 TiN 为载体的 Ru 催化剂，在碱性条件下实现高效稳定的氢气进化

电催化是提高水分离装置的效率和成本效益的关键，从而有助于推动氢成为一种清洁、可持续的能源载体。本研究的重点是合理设计以 TiN（Ru NPs/TiN）为载体的 Ru 纳米粒子催化剂，用于碱性条件下的氢气进化反应。所设计的催化剂在 63 mV 的过电位下具有 20 A mg-1Ru 的高活性和长期稳定性，超过了目前商用电解槽的基准。结构分析表明，TiN 衬底有效地改变了 Ru 纳米粒子的特性，而密度泛函理论计算则表明，Ru 粒子与 TiN 衬底有很强的粘附性，并通过粒子与衬底的相互作用对氢吸附能进行了有利的调节。最后，我们利用 Ru NPs/TiN 作为氢进化反应催化剂组装了阴离子交换膜电解槽，该电解槽可在 5 A cm-2 的条件下工作 1000 小时以上，降解几乎可以忽略不计，超过了商用电解槽的性能要求。我们的研究结果有助于利用颗粒与支撑物之间的相互作用设计高效的水分离催化剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nature Communications Biological Science Disciplines-

CiteScore

24.90

自引率

2.40%

发文量

6928

审稿时长

3.7 months

期刊介绍： Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.