School of Physical Electronics, Center for Public Security Information and Equipment Integration Technology, University of Electronic Science and Technology of China , Chengdu 610054, P. R. China.
ACS Appl Mater Interfaces. 2017 Nov 1;9(43):37750-37759. doi: 10.1021/acsami.7b11413. Epub 2017 Oct 19.
The electrocatalytic hydrogen evolution reaction (HER) has attracted increasing attention in the field of hydrogen-based economy, whereat developing cheap and efficient catalysts to reduce the use of Pt-based catalysts is highly required. Tin disulfide (SnS) as a new rising star has exhibited intriguing properties in energy storage and conversion applications, while showing slow progress in HER due to the inherent poor activity. Herein, we demonstrate the successful structural engineering and simultaneous integration of trace amount Pt in SnS nanosheets via a facile and effective in situ cycling voltammetry activation process, leading to the efficiently synergistic HER. Defect-rich SnS nanosheets decorated with a trace amount (0.37 wt %) of Pt exhibit greatly enhanced HER activity due to the synergy between them, revealing low onset potential of 32 mV and overpotential of 117 mV at 10 mA/cm, small Tafel slope of 69 mV/dec, and large exchange current density of 394.46 μA/cm. Present work provides an intriguing strategy for developing ultralow loading Pt electrocatalysts with high HER performance.
电催化析氢反应（HER）在氢能经济领域引起了越来越多的关注，在此背景下，人们强烈需要开发廉价、高效的催化剂来减少对 Pt 基催化剂的使用。二硫化锡（SnS）作为一种新兴的研究热点，在储能和转化应用中表现出了有趣的性能，但由于其内在的活性较差，在 HER 方面的进展缓慢。在本文中，我们通过一种简便有效的原位循环伏安激活过程，成功地对 SnS 纳米片中的痕量 Pt 进行了结构工程和同时集成，从而实现了高效协同的 HER。由于协同作用，富含缺陷的 SnS 纳米片上负载了痕量（0.37wt%）的 Pt，表现出了极大增强的 HER 活性，其起始电位低至 32 mV，在 10 mA/cm 时的过电势为 117 mV，塔菲尔斜率小至 69 mV/dec，交换电流密度高达 394.46 μA/cm。本工作为开发具有高 HER 性能的超低负载量 Pt 电催化剂提供了一种有趣的策略。
