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Nanostructured Molybdenum Phosphide/N-Doped Carbon Nanotube-Graphene Composites as Efficient Electrocatalysts for Hydrogen Evolution Reaction
Applied Catalysis A: General ( IF 4.7 ) Pub Date : 2020-02-02 , DOI: 10.1016/j.apcata.2020.117451
Min Hee Lee , Duck Hyun Youn , Jae Sung Lee

Uniformly dispersed ∼10 nm MoP nanoparticles on N-doped carbon nanotube and graphene composite (NCNT-NGR) support are synthesized via a simple temperature-programmed reduction method for electrocatalytic hydrogen evolution reaction (HER). The NCNT-NGR support is composed of well-intercalated carbon nanotube (CNT) between graphene layers, resulting in suppressed CNT bundling and graphene re-stacking, hence providing a large surface area. The prepared MoP/NCNT-NGR composite exhibits high HER activity than control catalysts (MoP/NCNT, MoP/NGR, and bare MoP) with a small benchmark overpotential of 100 mV to drive 10 mA/cm2 and an improved Tafel slope of 44 mV/dec in an acidic medium. It also exhibits excellent stability for 1000 potential cycles and in a 10-h chronoamperometry test. Such a HER performance arises from synergy between highly active MoP nanoparticles and the large surface area/highly conductive NCNT-NGR support.



中文翻译:

纳米结构的磷化钼/ N掺杂碳纳米管-石墨烯复合材料作为产氢反应的高效电催化剂

通过简单的程序升温还原法,在电催化氢释放反应(HER)上,在N掺杂碳纳米管和石墨烯复合材料(NCNT-NGR)载体上合成了均匀分散的〜10 nm MoP纳米颗粒。NCNT-NGR载体由石墨烯层之间的插层良好的碳纳米管(CNT)组成,可抑制CNT的束缚和石墨烯的重新堆积,从而提供较大的表面积。制备的MoP / NCNT-NGR复合材料比对照催化剂(MoP / NCNT,MoP / NGR和裸MoP)具有更高的HER活性,具有100 mV的较小基准过电势,可驱动10 mA / cm 2在酸性介质中的Tafel斜率提高了44 mV / dec。在1000个潜在周期和10小时计时电流测试中,它还具有出色的稳定性。此类HER性能源自高活性MoP纳米颗粒与大表面积/高导电性NCNT-NGR载体之间的协同作用。

更新日期:2020-02-03
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