Shtepliuk Ivan
Semiconductor Materials Division, Department of Physics, Chemistry and Biology-IFM, Linköping University, S-58183 Linköping, Sweden.
Phys Chem Chem Phys. 2023 Mar 22;25(12):8281-8292. doi: 10.1039/d3cp00156c.
High-performance electrocatalysts for the hydrogen evolution reaction are of interest in the development of next-generation sustainable hydrogen production systems. Although expensive platinum-group metals have been recognized as the most effective HER catalysts, there is an ongoing requirement for the discovery of cost-effective electrode materials. This paper reveals the prospects of two-dimensional (2D) noble metals, possessing a large surface area and a high density of active sites available for hydrogen proton adsorption, as promising catalytic materials for water splitting. An overview of the synthesis techniques is given. The advantages of wet chemistry approaches for the growth of 2D metals over deposition techniques show the potential for kinetic control that is required as a precondition to prevent isotropic growth. An uncontrolled presence of surfactant-related chemicals on a 2D metal surface is however the main disadvantage of kinetically controlled growth methods, which stimulates the development of surfactant-free synthesis approaches, especially template-assisted 2D metal growth on non-metallic substrates. Recent advances in the growth of 2D metals using a graphenized SiC platform are discussed. The existing works in the field of practical application of 2D noble metals for hydrogen evolution reaction are analyzed. This paper shows the technological viability of the "2D noble metals" concept for designing electrochemical electrodes and their implementation into future hydrogen production systems, thereby providing an inspirational background for further experimental and theoretical studies.
用于析氢反应的高性能电催化剂在下一代可持续制氢系统的发展中备受关注。尽管昂贵的铂族金属已被公认为最有效的析氢反应催化剂，但仍持续需要发现具有成本效益的电极材料。本文揭示了二维（2D）贵金属作为有前景的水分解催化材料的前景，这类材料具有大表面积和高密度的可用于氢质子吸附的活性位点。文中给出了合成技术的概述。与沉积技术相比，湿化学方法用于二维金属生长的优势表明了动力学控制的潜力，而动力学控制是防止各向同性生长的前提条件。然而，二维金属表面存在与表面活性剂相关的化学物质且不受控制是动力学控制生长方法的主要缺点，这促使了无表面活性剂合成方法的发展，特别是在非金属衬底上模板辅助二维金属生长。讨论了使用石墨化碳化硅平台生长二维金属的最新进展。分析了二维贵金属在析氢反应实际应用领域的现有工作。本文展示了“二维贵金属”概念在设计电化学电极及其应用于未来制氢系统方面的技术可行性，从而为进一步的实验和理论研究提供了启发背景。
