Wang Zhou, Li Tong, Wang Qi
Key Laboratory of Liquid-Solid Structural Evolution and Processing of Materials of Ministry of Education, School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
Nanomaterials (Basel). 2024 Jan 13;14(2):185. doi: 10.3390/nano14020185.
Surface engineering has been proved efficient and universally applicable in improving the performance of CeO in various fields. However, previous approaches have typically required high-temperature calcination or tedious procedures, which makes discovery of a moderate and facile modification approach for CeO an attractive subject. In this paper, porous CeO nanosheets with effective nitrogen-doping were synthesized via a low-temperature NH/Ar plasma treatment and exhibited boosted hydrogen evolution reaction performance with low overpotential (65 mV) and long-term stability. The mechanism of the elevated performance was investigated by introducing Ar-plasma-treated CeO with no nitrogen-doping as the control group, which revealed the dominant role of nitrogen-doping by providing abundant active sites and improving charge transfer characteristics. This work illuminates further investigations into the surface engineering methodologies boosted by plasma and the relative mechanism of the structure-activity relationship.
表面工程已被证明在提高CeO在各个领域的性能方面是高效且普遍适用的。然而，以前的方法通常需要高温煅烧或繁琐的程序，这使得发现一种温和且简便的CeO改性方法成为一个有吸引力的课题。在本文中，通过低温NH/Ar等离子体处理合成了具有有效氮掺杂的多孔CeO纳米片，其在低过电位（65 mV）和长期稳定性方面表现出增强的析氢反应性能。通过引入未掺杂氮的Ar等离子体处理的CeO作为对照组，研究了性能提高的机制，这揭示了氮掺杂通过提供丰富的活性位点和改善电荷转移特性所起的主导作用。这项工作为进一步研究由等离子体推动的表面工程方法以及结构-活性关系的相关机制提供了思路。
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