P Dopants Triggered New Basal Plane Active Sites and Enlarged Interlayer Spacing in MoS2 Nanosheets toward Electrocatalytic Hydrogen Evolution
P Dopants Triggered New Basal Plane Active Sites and Enlarged Interlayer Spacing in MoS2 Nanosheets toward Electrocatalytic Hydrogen Evolution
复制标题
P 掺杂剂在 MoS2 纳米片中引发新的基底面活性位点和扩大的层间距，以实现电催化析氢
DOI：
10.1021/acsenergylett.7b00111
复制
发表时间：
2017-04-01
影响因子：
22
通讯作者：
Xue, Desheng
中科院分区：
文献类型：
--
作者：
Liu, Peitao;Zhu, Jingyi;Xue, Desheng
MoS 2基过渡金属硫族化合物被认为是一种高活性、高性价比、稳定性好的材料，在电催化制氢方面具有很大的应用潜力。然而，它们有限的活性中心数量和差的导电性阻碍了制氢效率。结合计算和实验，我们表明，P掺杂剂可能是新的活性位点在基底平面的二硫化钼，并有助于提高本征电子电导率，导致显着提高活性的析氢。此外，P掺杂的MoS 2纳米片显示出增大的层间距，促进了氢的吸附和释放过程。实验结果表明，层间距增大的P掺杂MoS 2纳米片具有显著的电催化活性和良好的长期操作稳定性（Tafel斜率为34 mV/dec，在10 mA/cm 2时过电位极低，仅为43 mV）。我们的方法证明了一种简单的技术...
MoS2-based transition-metal chalcogenides are considered as cost-effective, highly active, and stable materials with great potential in the application of electrocatalytic hydrogen production. However, their limited quantity of active sites and poor conductivity have hampered the efficiency of hydrogen production. Combining calculations and experiments, we demonstrate that P dopants could be the new active sites in the basal plane of MoS2 and help improve the intrinsic electronic conductivity, leading to a significantly improved activity for hydrogen evolution. Furthermore, the P-doped MoS2 nanosheets show enlarged interlayer spacing, facilitating hydrogen adsorption and release progress. Experimental results indicate that the P-doped MoS2 nanosheets with enlarged interlayer spacing exhibit remarkable electrocatalytic activity and good long-term operational stability (with Tafel slope of 34 mV/dec and an extremely low overpotential of ∼43 mV at 10 mA/cm2) . Our method demonstrated a facile technology for ...