Carbon-Nanotube-Incorporated Graphene Scroll-Sheet Conjoined Aerogels for Efficient Hydrogen Evolution Reaction
Carbon-Nanotube-Incorporated Graphene Scroll-Sheet Conjoined Aerogels for Efficient Hydrogen Evolution Reaction
复制标题
碳纳米管掺入石墨烯卷轴片连体气凝胶用于高效析氢反应
DOI：
10.1021/acssuschemeng.7b01181
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发表时间：
2017
影响因子：
8.4
通讯作者：
Liu Tianxi
中科院分区：
文献类型：
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作者：
Shi Yiqin;Gao Wei;Lu Hengyi;Huang Yunpeng;Zuo Lizeng;Fan Wei;Liu Tianxi
在开发氢作为可持续新能源载体方面，非常需要开发低成本的无 Pt 析氢反应 (HER) 电催化剂。在此，分层结构的石墨烯-碳纳米管气凝胶-MoSe2杂化物（GCA-MoSe2）被构建为高效的HER电催化剂。 GCA 可以通过直接冷冻干燥氧化石墨烯 (GO)-碳纳米管 (CNT) 混合分散体并随后碳化来轻松制备。通过急速冷却方法，GCA中可以形成独特的卷轴片联合结构，该结构可以充当高导电骨架，从而促进电子在整个混合体中的传输。此外，碳纳米管作为石墨烯层之间的“间隔物”，可以有效阻止它们的重新堆叠，从而充分发挥石墨烯优异的导电性。分层多孔气凝胶骨架可以使电解质完全浸渍，加速离子扩散动力学。受益于三维（3D）新...
Developing low-cost Pt-free hydrogen evolution reaction (HER) electrocatalyst is highly desired in exploiting hydrogen as a sustainable new energy carrier. Herein, hierarchically structured graphene-carbon nanotube aerogel-MoSe2 hybrid (GCA-MoSe2) was constructed as efficient HER electrocatalysts. GCA was facilely fabricated by direct freeze-drying of graphene oxide (GO)-carbon nanotube (CNT) hybrid dispersion, with subsequent carbonization. Through a shock cooling method, a unique scroll-sheet conjoined architecture could be formed in GCA, which can function as highly conductive skeleton, thus facilitating the transport of electrons through the whole hybrids. Furthermore, CNTs acting as “spacers” between graphene layers can efficiently impede their restacking, thus giving full play to the superior electrical conductivity of graphene. The hierarchical porous aerogel skeleton could allow full impregnation of electrolyte, accelerating the ion diffusion kinetics. Benefiting from the three-dimensional (3D) ne...