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Enhanced electrocatalytic performance of nickel diselenide grown on graphene toward the reduction of triiodide redox couples

机译：增强了在石墨烯上生长的镍五烯酯的电催化性能朝向Triodide氧化还原伴侣的减少

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摘要

The promising activity of nickel diselenide (NiSe2) towards electrocatalysis has made it especially attractive in energy conversion fields. However, NiSe2 with high electrocatalytic performance always requires complicated fabrication or expensive conductive polymers, resulting in the scale-up still being challenging. Herein, we introduce a simple and cost-effective synthesis of NiSe2 dispersed on the surface of graphene (NiSe2/RGO NPs). NiSe2/RGO NPs exhibited enhanced electrocatalytic performance and long-term stability for the reduction reaction of triiodide redox couples in dye-sensitized solar cells (DSSCs). Leveraging the advantageous features, the DSSC fabricated with NiSe2/RGO NPs as CE had a smaller charge-transfer resistance (Rct) value and higher short-circuit current density and fill factor than naked NiSe2 NPs. Additionally, NiSe2/RGO NPs achieved a PCE of 7.76%, higher than that of pure NiSe2 (6.51%) and even exceeding that of Pt (7.56%). These prominent features demonstrated that the NiSe2/RGO NPs in this work are a promising cheap and efficient electrocatalyst to replace state-of-the-art Pt.
机译：镍五烯醇（NiSE2）朝向电常分的有希望的活性使其在能量转换场中特别有吸引力。然而，具有高电催化性能的NISE2总是需要复杂的制造或昂贵的导电聚合物，导致仍然具有挑战性的扩展。在此，我们引入了分散在石墨烯表面上的简单且经济高效的NISE2合成（NISE2 / RGO NPS）。 NISE2 / RGO NPS表现出增强的电催化性能和长期稳定性，用于在染料敏化太阳能电池（DSSCs）中的三碘氧化还原耦合的还原反应。利用有利的特征，用NiSE2 / Rgo NPS制造的DSSC为Ce具有较小的电荷 - 转移电阻（RCT）值和较高的短路电流密度，填充因子比裸NISE2NPS更高。此外，NISE2 / RGO NPS实现了7.76％的PCE，高于纯NISE2（6.51％），甚至超过PT（7.56％）。这些突出的特点表明，这项工作中的NISE2 / RGO NP是一个有前途的便宜和有效的电催化剂，以取代最先进的PT。

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  • 来源
    《RSC Advances》 |2018年第49期|共8页
  • 作者

    Zhang Xiao; Zhang Haijun; Wang Xingyu; Zhou Xiaomeng;

  • 作者单位

    Civil Aviat Univ China Ctr Aircraft Fire &

    Emergency Tianjin 300300 Peoples R China;

    Civil Aviat Univ China Ctr Aircraft Fire &

    Emergency Tianjin 300300 Peoples R China;

    Civil Aviat Univ China Ctr Aircraft Fire &

    Emergency Tianjin 300300 Peoples R China;

    Civil Aviat Univ China Ctr Aircraft Fire &

    Emergency Tianjin 300300 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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