Lau Thomas H M, Foord John S, Tsang S C Edman
Department of Chemistry, University of Oxford, Oxford, OX1 3QR, UK.
Nanoscale. 2020 May 21;12(19):10447-10455. doi: 10.1039/d0nr01295e. Epub 2020 May 7.
2D nanosheets give enhanced surface area to volume ratios in particle morphology and they can also provide defined surface sites to disperse foreign atoms. Placing atoms of catalytic interest on 2D nanosheets as Single Atom Catalysts (SAC) represents one of the novel approaches due to their unique but tunable electronic and steric characteristics. Here in this mini-review, we particularly highlight some recent and important developments on heteroatom doped MoS nanosheets (SAC-MoS) as catalysts for the electrochemical hydrogen evolution reaction (HER) from water, which could lead to opening up to a flagship of important renewable technologies in future. It is shown that the nature of dopants, doping positions and the polytypes of MoS nanosheets are the determining factors in the overall catalytic abilities of these functionalised nanosheets. This may serve to obtain atomic models which lead to further understanding of the 'metal-support interaction' in catalysis.
二维纳米片在颗粒形态上具有更高的表面积与体积比，并且它们还能提供特定的表面位点来分散外来原子。将具有催化活性的原子作为单原子催化剂（SAC）置于二维纳米片上，由于其独特但可调节的电子和空间特性，这代表了一种新颖的方法。在本综述中，我们特别强调了杂原子掺杂的MoS纳米片（SAC-MoS）作为水的电化学析氢反应（HER）催化剂的一些近期重要进展，这可能会在未来开启一系列重要可再生技术的先河。结果表明，掺杂剂的性质、掺杂位置以及MoS纳米片的多型性是这些功能化纳米片整体催化能力的决定性因素。这可能有助于获得原子模型，从而进一步理解催化中的“金属-载体相互作用”。
