铵根插层二硫化钼的电催化析氢性能研究

Study on electrocatalytic hydrogen evolution property of ammonium intercalated molybdenum disulfide

通过简单的水热法,制备了一种铵根插层的MoS2纳米电催化剂。通过铵根插层后,MoS2的层间距增大,使催化活性位点密度增加,促进了电荷转移,并表现出优异的电催化析氢反应活性。电化学测试结果表明,添加适量(3mL)氨水所合成的铵根插层MoS2具有优异的电催化析氢性能,在-10mA/cm^2处的过电位由纯MoS2的388mV降至278mV,塔菲尔斜率也由118mV/dec降至62mV/dec,电催化析氢性能明显提升。此外,铵根插层也可以改善MoS2催化剂的电化学制氢稳定性。

An ammonium intercalated molybdenum disulfide nanoelectrocatalyst was prepared by a simple hydrothermal method.After intercalated by ammonium,molybdenum disulfide layer spacing increased,increased density of catalytically active sites,and promoted the charge transfer.The excellent electrocatalytic activity was exhibited for hydrogen evolution reaction.The electrochemical test results shown that the ammonium intercalation MoS2 synthesized by adding proper amount(3 mL)of ammonia water had excellent electrocatalytic hydrogen evolution performance,and the overpotential at-10 mA/cm^2 was reduced from 388 mV of pure MoS2 to 278 mV,the Tafel slope was also reduced from 118 mV/dec to 62 mV/dec,and the electrocatalytic hydrogen evolution performance was significantly improved.In addition,the ammonium intercalation layer can also improve the electrochemical hydrogen production stability of the MoS2 catalyst.