Amine group induced high activity of highly torn amine functionalized nitrogen-doped graphene as the metal-free catalyst for hydrogen evolution reaction
Amine group induced high activity of highly torn amine functionalized nitrogen-doped graphene as the metal-free catalyst for hydrogen evolution reaction
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胺基诱导高度撕裂的胺功能化氮掺杂石墨烯作为析氢反应的无金属催化剂的高活性
DOI：
10.1016/j.carbon.2018.06.008
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发表时间：
2018-11-01
期刊：
影响因子：
10.9
通讯作者：
Liu, Meilin
中科院分区：
文献类型：
--
作者：
Deng, Binglu;Wang, Da;Liu, Meilin
采用氨存在下氧化石墨烯的水热反应和球磨的简单合成方法，制备了一种无金属高撕裂胺功能化氮掺杂石墨烯（HT-AFNG）作为析氢反应（HER）催化剂。无金属HT-AFNG在酸性溶液中对HER有效，并且在电流密度为10 mA cm（-2）时可以提供100 mV的起始电位和350 mV的过电位，这远远低于之前报道的单掺杂和双掺杂石墨烯。胺官能化和氮掺杂结构在HT-AFNG的高催化活性中起着重要作用，其中胺基可以大大降低缺陷和边缘位置的垂杆δ G（H*）垂杆值，并增加氮掺杂石墨烯（NG）的电子转移能力。值得注意的是，高度撕裂的结构也对HT-AFNG的高催化活性做出了很大贡献，因为它允许HER的活性位点的良好可达性。该策略涉及引入给电子基团，为提高石墨烯基材料的HER催化活性开辟了新的研究途径。(C) 2018 Elsevier Ltd.版权所有。
A metal-free highly torn amine functionalized nitrogen doped graphene (HT-AFNG) used as hydrogen evolution reaction (HER) catalyst is prepared by using a simple synthesis method involving the hydro-thermal reaction of graphene oxide in the presence of ammonia and the subsequent ball milling. The metal-free HT-AFNG is efficient for the HER in the acid solution and can deliver an onset potential of 100 mV and an overpotential of 350 mV at the current density of 10 mA cm(-2), which is much lower than those of the singly and dually doped graphene reported previously. The amine functionalized and nitrogen doped structure plays an important role in the high catalytic activity of the HT-AFNG, where the amine group can greatly reduce the vertical bar Delta G(H*)vertical bar value at both defect and edge sites as well as increases the electron transfer capability of nitrogen dope graphene (NG). Significantly, the highly torn structure also makes a big contribution on the high catalytic activity of the HT-AFNG, since it allows for the good accessibility of the active sites for the HER. The strategy involves the introduction of electron donating groups open a new research pathway towards the improvement of HER catalytic activity of graphene-based materials. (C) 2018 Elsevier Ltd. All rights reserved.