Ultra-small RuPx nanoparticles on graphene supported schiff-based networks for all pH hydrogen evolution

Ultra-small RuPx nanoparticles on graphene supported schiff-based networks for all pH hydrogen evolution
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石墨烯上的超小型 RuPx 纳米粒子支持希夫网络,适用于所有 pH 值的析氢

DOI:
10.1016/j.ijhydene.2018.12.220
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发表时间:
2019-03
影响因子:
7.2
通讯作者:
Xiaobin Fan
Xiaobin Fan
中科院分区:
工程技术2区
文献类型:
--
作者:
Tingting Zhai;Yuanzhi Zhu;Yang Li;Wenchao Peng;Guoliang Zhang;Fengbao Zhang;Xiaobin Fan

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作为在析氢反应中替代铂的候选催化剂,磷化Ru催化剂表现出了优异的性能,受到越来越多的关注。然而,控制载体上RuPxare的颗粒大小仍然是一个挑战。在本研究中,我们成功地在石墨烯上生长了具有三维刚性有机网络的席夫基网络,并将所得到的复合材料用作RuPx的新载体。这种复合材料不仅可以提供更多的金属配位,而且还可以限制RuPx的生长。因此,超小的RuPx纳米颗粒通过随后的磷化和热解过程被均匀分散。最终的RuPx/NPG催化剂在电流密度为10 mA/cm−2(在0.5M的H_2SO_4溶液中为32 mV,在1 M的KOH溶液中为13 mV,在1 M的PbS溶液中为50 mV)下表现出较低的过电位。本工作将席夫网络引入石墨烯中,为解决金属磷化物在衬底上的聚集问题提供了一种新的策略。
As a promising candidate to replace Pt in hydrogen evolution reaction (HER), ruthenium phosphide catalysts have shown excellent performance and attract increasing attention. However, it is still a challenge to control the particle sizes of RuPxwere on the supports. In this study, the Schiff-based networks with 3D rigid organic networks are successfully grown on graphene, and the obtained composite was used as a new support for the RuPx. This composite can not only provide more metal coordinating sites but also restrict the growth of RuPx. Therefore, ultra-small RuPxnanoparticles are uniformly dispersedviaa subsequent phosphating and pyrolysis process. The final RuPx/NPG catalyst exhibits low overpotentials at the current density of 10 mA cm−2(32 mV in 0.5 M H2SO4solution, 13 mV in 1 M KOH solution, and 50 mV in 1 M PBS solution). This work provides a new strategy to solve the aggregation problem of the metal phosphides on the substrate by introducing Schiff-based networks into the graphene.
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