Ultrathin MoS2 nanosheets growing within an in-situ-formed template as efficient electrocatalysts for hydrogen evolution
Ultrathin MoS2 nanosheets growing within an in-situ-formed template as efficient electrocatalysts for hydrogen evolution
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在原位形成的模板内生长的超薄 MoS2 纳米片作为析氢的有效电催化剂
DOI：
10.1016/j.jpowsour.2014.11.039
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发表时间：
2015-02-01
影响因子：
9.2
通讯作者：
Tang, Yi
中科院分区：
文献类型：
--
作者：
Liu, Ning;Yang, Lichun;Tang, Yi
水热过程中原位形成的多糖的空间限制生长被成功地用于制造超薄MoS2纳米片，并在碳化后进一步演化为MoS2/C与导电碳均匀集成的纳米片（2-4 nm）。 MoS2/C表现出优异的析氢反应（HER）活性，在eta = 200 mV时具有类似于80 mV的小起始过电势和88 mA cm(-2)的高电流密度，这与超薄MoS2上丰富的边缘位点和碳基体改善的电导率有关。这项工作表明，碳内的超薄MoS2纳米片具有协同增强的HER活性和电导率，通过基于多糖基质的空间限制生长是可行的，这将为开发高效电催化剂开辟新的机会。 (C) 2014 Elsevier B.V. 保留所有权利。
The space-confined growth by in-situ formed polysaccharides during hydrothermal process is successfully employed to fabricate ultrathin MoS2 nanosheets, which further evolve to MoS2/C evenly integrating nanosheets (2-4 nm) with conducting carbon after carbonization. The MoS2/C exhibits an excellent activity for hydrogen evolution reaction (HER) with a small onset overpotential of similar to 80 mV and a high current density of 88 mA cm(-2) at eta = 200 mV, which is associated with the enriched rim-sites on ultrathin MoS2 and the improved conductivity by carbon matrix. This work demonstrates that the ultrathin MoS2 nanosheets within carbon, possessing synergistically-enhanced activity and conductivity for HER, are feasible through the space-confined growth based on polysaccharide matrix, and this would open up new opportunities for exploiting highly efficient electrocatalysts. (C) 2014 Elsevier B.V. All rights reserved.