Xu Hui, Shang Hongyuan, Wang Cheng, Du Yukou
College of Chemistry Chemical Engineering and Materials Science Soochow University, Suzhou, 215123, P. R. China.
Small. 2021 Feb;17(5):e2005092. doi: 10.1002/smll.202005092. Epub 2021 Jan 15.
Pd- and Pd-based catalysts have emerged as potential alternatives to Pt- and Pt-based catalysts for numerous electrocatalytic reactions, particularly fuel cell-related reactions, including the anodic fuel oxidation reaction (FOR) and cathodic oxygen reduction reaction (ORR). The creation of Pd- and Pd-based architectures with large surface areas, numerous low-coordinated atoms, and high density of defects and edges is the most promising strategy for improving the electrocatalytic performance of fuel cells. Recently, 2D Pd-based nanomaterials with single or few atom thickness have attracted increasing interest as potential candidates for both the ORR and FOR, owing to their remarkable advantages, including high intrinsic activity, high electron mobility, and straightforward surface functionalization. In this review, the recent advances in 2D Pd-based nanomaterials for the FOR and ORR are summarized. A fundamental understanding of the FOR and ORR is elaborated. Subsequently, the advantages and latest advances in 2D Pd-based nanomaterials for the FOR and ORR are scientifically and systematically summarized. A systematic discussion of the synthesis methods is also included which should guide researchers toward more efficient 2D Pd-based electrocatalysts. Lastly, the future outlook and trends in the development of 2D Pd-based nanomaterials toward fuel cell development are also presented.
钯基和基于钯的催化剂已成为铂基和基于铂的催化剂在众多电催化反应中的潜在替代品，特别是与燃料电池相关的反应，包括阳极燃料氧化反应（FOR）和阴极氧还原反应（ORR）。构建具有大表面积、大量低配位原子以及高密度缺陷和边缘的钯基和基于钯的结构，是提高燃料电池电催化性能最具前景的策略。最近，具有单原子或少数原子厚度的二维钯基纳米材料作为ORR和FOR的潜在候选材料引起了越来越多的关注，这归因于它们的显著优势，包括高本征活性、高电子迁移率以及直接的表面功能化。在这篇综述中，总结了二维钯基纳米材料在FOR和ORR方面的最新进展。阐述了对FOR和ORR的基本理解。随后，科学且系统地总结了二维钯基纳米材料在FOR和ORR方面的优势及最新进展。还包括对合成方法进行的系统讨论，这应能引导研究人员开发出更高效的二维钯基电催化剂。最后，还介绍了二维钯基纳米材料在燃料电池发展方面的未来展望和趋势。
