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首页> 外文期刊>Carbon: An International Journal Sponsored by the American Carbon Society >Polyoxometalate-decorated graphene nanosheets and carbon nanotubes, powerful electrocatalysts for hydrogen evolution reaction
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Polyoxometalate-decorated graphene nanosheets and carbon nanotubes, powerful electrocatalysts for hydrogen evolution reaction

机译：用多金属氧酸盐修饰的石墨烯纳米片和碳纳米管，是用于氢气释放反应的强大电催化剂

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The present study is an attempt to prepare new nanocomposites based on Pt-modified [PW11NiO39](5-)@reduced graphene oxide (rGO) and Pt-modified [PW11NiO39](5-)@multiwall carbon nanotubes (CNT). For this purpose, poly diallyldimethylammonium chloride (PDDA) modified-rGO and PDDA-CNT are prepared, the surfaces of which are then decorated with polyoxometalate ([PW11NiO39](5-)). Finally, [PW11NiO39](5-)@PDDA-rGO and [PW11NiO39](5-)@PDDA-CNT are decorated with platinum nanoparticles to fabricate [PW(11)PteNiO(39)](5-)@ PDDA-CNT/GCE and [PW(11)PteNiO(39)](-)@PDDArGO/GCE. The amounts of the noble metal required for the modification of the electrodes is reduced by using the replacement reaction, as a simple and effective method. Polarization measurement, cyclic voltammetry and electrochemical impedance spectroscopy are used to investigate the electrochemical properties of [PW(11)PteNiO(39)](-)@PDDA-rGO and [PW(11)PteNiO(39)](-)@ PDDA-CNT in a solution of 0.5 mol L (1) H2SO4. The nanocomposites are then characterized in detail using scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction pattern, Brunauer-Emmett-Teller surface area analysis and infrared spectroscopy. It is found that the nanocomposites exhibit a high catalytic activity for hydrogen evolution reaction with low overpotentials, high current densities and long-term stability. (C) 2015 Elsevier Ltd. All rights reserved.
机译：本研究是尝试基于Pt修饰的[PW11NiO39]（5-）@还原氧化石墨烯（rGO）和Pt修饰的[PW11NiO39]（5-）@多壁碳纳米管（CNT）制备新的纳米复合材料。为此，制备了聚二烯丙基二甲基氯化铵（PDDA）改性的rGO和PDDA-CNT，然后将其表面用多金属氧酸盐（[PW11NiO39]（5-）装饰）。最后，用铂纳米粒子修饰[PW11NiO39]（5-）@ PDDA-rGO和[PW11NiO39]（5-）@ PDDA-CNT以制造[PW（11）PteNiO（39）]（5-）@ PDDA-CNT / GCE和[PW（11）PteNiO（39）]（-）@ PDDArGO / GCE。作为一种简单有效的方法，通过使用置换反应减少了电极修饰所需的贵金属量。极化测量，循环伏安法和电化学阻抗谱用于研究[PW（11）PteNiO（39）]（-）@ PDDA-rGO和[PW（11）PteNiO（39）]（-）@ PDDA的电化学性质-CNT在0.5 mol L（1）的H2SO4溶液中。然后使用扫描电子显微镜，透射电子显微镜，能量色散X射线光谱，X射线衍射图，Brunauer-Emmett-Teller表面积分析和红外光谱对纳米复合材料进行详细表征。发现该纳米复合材料显示出对氢释放反应的高催化活性，具有低的超电势，高的电流密度和长期的稳定性。 （C）2015 Elsevier Ltd.保留所有权利。

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