Facile microwave approach towards high performance MoS2/graphene nanocomposite for hydrogen evolution reaction  

基于简易微波方法制备高性能MoS2/石墨烯纳米复合材料用于高效析氢反应（英文）

作　　者：Shatila Sarwar Amit Nautiyal Jonathan Cook Yifei Yuan Junhao Li Sunil Uprety Reza Shahbazian-Yassar Ruigang Wang Minseo Park Michael J.Bozack Xinyu Zhang Shatila Sarwar;Amit Nautiyal;Jonathan Cook;袁一斐;李俊豪;Sunil Uprety;Reza Shahbazian-Yassar;王瑞刚;Minseo Park;Michael J.Bozack;张新宇(Department of Chemical Engineering,Auburn University,Auburn,AL 36849,USA;Department of Mechanical and Industrial Engineering,University of Illinois at Chicago,Chicago,IL 60607,USA;Chemical Sciences and Engineering Division,Argonne National Laboratory,IL,60439,USA;Department of Metallurgical and Materials Engineering,University of Alabama,Tuscaloosa,AL 35487,USA;Department of Physics,Auburn University,Auburn,AL 36849,USA)

机构地区：[1]Department of Chemical Engineering,Auburn University,Auburn,AL 36849,USA [2]Department of Mechanical and Industrial Engineering,University of Illinois at Chicago,Chicago,IL 60607,USA [3]Chemical Sciences and Engineering Division,Argonne National Laboratory,IL,60439,USA [4]Department of Metallurgical and Materials Engineering,University of Alabama,Tuscaloosa,AL 35487,USA [5]Department of Physics,Auburn University,Auburn,AL 36849,USA

出　　处：《Science China Materials》2020年第1期62-74,共13页中国科学（材料科学（英文版）

基　　金：supported by Auburn UniversityIntramural Grants Program (AU-IGP)

摘　　要：Low-cost, highly efficient catalysts for hydrogen evolution reaction(HER) are very important to advance energy economy based on clean hydrogen gas. Intensive studies on two-dimensional molybdenum disulfides(2 D Mo S2) have been conducted due to their remarkable catalytic properties.However, most of the reported syntheses are time consuming,complicated and less efficient. The present work demonstrates the production of Mo S2/graphene catalyst via an ultra-fast(60 s) microwave-initiated approach. High specific surface area and conductivity of graphene delivers a favorable conductive network for the growth of Mo S2 nanosheets, along with rapid charge transfer kinetics. As-produced Mo S2/graphene nanocomposites exhibit superior electrocatalytic activity for the HER in acidic medium, with a low onset potential of62 m V, high cathodic currents and a Tafel slope of43.3 m V/decade. Beyond excellent catalytic activity, Mo S2/graphene reveals long cycling stability with a very high cathodic current density of around 1000 m A cm^-2 at an overpotential of 250 m V. Moreover, the Mo S2/graphene-catalyst exhibits outstanding HER activities in a temperature range of 30 to 120°C with low activation energy of36.51 k J mol^-1, providing the opportunity of practical scalable processing.用于析氢反应(HER)的低成本、高效能催化剂对于推进基于清洁氢气的能源工业非常重要.二维二硫化钼(MoS2)具有显著的催化性能,因而已被人们广泛深入研究.然而,大多数现有的合成方法耗时、复杂且效率较低.本文通过超快(60秒)微波引发的方法生产MoS2/石墨烯催化剂.石墨烯的高比表面积和导电性为MoS2纳米片的生长提供了有利的导电网络和快速电荷转移动力.文中制备的MoS2/石墨烯纳米复合材料在酸性介质中对HER表现出优异的电催化活性,具有62 mV的低起始电位,高阴极电流和43.3mV/dec的Tafel斜率.除了优异的催化活性外, MoS2/石墨烯还具有较长的循环稳定性,在250 mV的过电位下阴极电流密度高达1000 mA cm^-2.此外, MoS2/石墨烯催化剂在30–120°C范围内具有出色的HER活性和36.51 kJ mol^-1的低活化能,提供了潜在的大批量生产和制备的机会.

关 键 词：microwave-initiated synthesis MoS2/graphene nanocomposite ELECTROCATALYSIS hydrogen evolution reaction 

分 类 号：TB33[一般工业技术—材料科学与工程] TQ116.2[化学工程—无机化工]