Strong metal–support interaction boosts the electrocatalytic hydrogen evolution capability of Ru nanoparticles supported on titanium nitride
Strong metal–support interaction boosts the electrocatalytic hydrogen evolution capability of Ru nanoparticles supported on titanium nitride
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DOI：
10.1002/cey2.391
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发表时间：
2023-08
期刊：
影响因子：
20.5
通讯作者：
Xin Wang;X. Yang;Guangxian Pei;Jifa Yang;Junzhe Liu;Fengwang Zhao;Fayi Jin;Weiping Jiang
中科院分区：
文献类型：
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作者：
Xin Wang;X. Yang;Guangxian Pei;Jifa Yang;Junzhe Liu;Fengwang Zhao;Fayi Jin;Weiping Jiang
Ru(Ru)因其固有的高活性和最便宜的铂族金属而被认为是最有前途的替代铂催化碱性析氢反应(HER)的催化剂之一。本论文基于强金属-载体相互作用(SMSi)调控的思想，在Ru纳米颗粒表面制备了不同程度TiN覆盖层的Ru/TiN催化剂，并将其应用于碱性电解水中。表征表明，随着SmSi程度的增加，TiN覆盖层逐渐包裹Ru纳米粒子，并通过Ru-N-Ti键诱导更多的电子从Ru纳米粒子转移到TiN载体上。进一步的研究表明，裸露的Ru-TiN界面极大地提高了H2的脱附能力。因此，中等SmSi程度的Ru/TiN-300表现出了良好的HER性能，在10 mA cm−2时过电势为38 mV。此外，由于TiN对Ru纳米粒子的包裹作用，它具有超长期稳定性，24 h后电势变化很小。本研究深入了解了Ru和TiN之间的SmSi效应对HER的影响，为通过SmSi工程制备高效稳定的HER电催化剂提供了新的途径。
Ruthenium (Ru) has been regarded as one of the most promising alternatives to substitute Pt for catalyzing alkaline hydrogen evolution reaction (HER), owing to its inherent high activity and being the cheapest platinum‐group metal. Herein, based on the idea of strong metal–support interaction (SMSI) regulation, Ru/TiN catalysts with different degrees of TiN overlayer over Ru nanoparticles were fabricated, which were applied to the alkaline electrolytic water. Characterizations reveal that the TiN overlayer would gradually encapsulate the Ru nanoparticles and induce more electron transfer from Ru nanoparticles to TiN support by the Ru–N–Ti bond as the SMSI degree increased. Further study shows that the exposed Ru–TiN interfaces greatly promote the H2 desorption capacity. Thus, the Ru/TiN‐300 with a moderate SMSI degree exhibits excellent HER performance, with an overpotential of 38 mV at 10 mA cm−2. Also, due to the encapsulation role of TiN overlayer on Ru nanoparticles, it displays super long‐term stability with a very slight potential change after 24 h. This study provides a deep insight into the influence of the SMSI effect between Ru and TiN on HER and offers a novel approach for preparing efficient and stable HER electrocatalysts through SMSI engineering.