Electropolymerization of aniline on nickel-based electrocatalysts substantially enhances their performance for hydrogen evolution
Electropolymerization of aniline on nickel-based electrocatalysts substantially enhances their performance for hydrogen evolution
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DOI：
10.1021/acsaem.7b00005
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发表时间：
2017-12
期刊：
影响因子：
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通讯作者：
Fu-zhan Song;Wei Li;Guanqun Han;Yujie Sun
中科院分区：
文献类型：
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作者：
Fu-zhan Song;Wei Li;Guanqun Han;Yujie Sun
人们一直致力于开发用于析氢反应（HER）的合适电催化剂。然而，有限的注意力一直致力于探索导电聚合物的好处，以改善各种HER电催化剂的性能。在此，我们证明了苯胺在泡沫镍（PANI/Ni/NF）上的电聚合显著增加了后者的HER性能从pH 14到0。例如，在碱性电解液中，PANI/Ni/NF在仅72 mV的过电位下实现了−10 mA cm-2的电流密度，比原始镍泡沫低约100 mV。我们进一步证明，这样的层也可以提高磷化镍和硫化物的HER性能，突出了PANI在提高各种低成本电催化剂的HER活性方面的巨大通用性。
Extensive efforts have been devoted to developing competent electrocatalysts for hydrogen evolution reaction (HER). However, limited attention has been devoted to exploring the benefits of conductive polymers to improve the performance of various HER electrocatalysts. Herein, we demonstrate that electropolymerization of aniline on nickel foam (PANI/Ni/NF) dramatically increases the latter’s HER performance from pH 14 to 0. For instance, in alkaline electrolyte, PANI/Ni/NF achieved the current density of −10 mA cm–2 at an overpotential of merely 72 mV, ∼100 mV less than that of the pristine nickel foam. We further demonstrate that such a layer can also boost the HER performance of nickel phosphides and sulfides, highlighting the great versatility of PANI in improving the HER activities of various low-cost electrocatalysts.