NiFe2O4-Ni3S2 nanorod array/Ni foam composite catalyst indirectly controlled by Fe3+ immersion for an efficient oxygen evolution reaction
NiFe2O4-Ni3S2 nanorod array/Ni foam composite catalyst indirectly controlled by Fe3+ immersion for an efficient oxygen evolution reaction
复制标题
NiFe2O4-Ni3S2纳米棒阵列/泡沫镍复合催化剂通过Fe3浸入间接控制，可实现高效的析氧反应
DOI：
10.1016/j.ijhydene.2021.01.221
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发表时间：
2021-04-09
影响因子：
7.2
通讯作者：
Zhao, Qiang
中科院分区：
文献类型：
--
作者：
Cheng, Chen;Li, Dandan;Zhao, Qiang
以泡沫镍为前驱体，采用阴极电极法设计了NiFe合金。采用Fe3+浸渍和水热硫化法制备了NiFe2O4-Ni3S2纳米棒(NRS)复合催化剂。用水热直接硫化法制备了NiFe合金的NiFe2O4-Ni3S2纳米片(NSS)。与NiFe2O4-Ni3S2NSS/NF致密的NS结构相比，NiFe2O4-Ni3S2NRS/NF具有独特的由额外的析氧反应(OER)活性中心组成的杂草状NR阵列结构，具有较强的Ni和Fe电子相互作用以及活性硫化物与氧化物的协同作用，因此具有更好的析氧性能。因此，当驱动电流密度为10 mA cm(-2)时，催化剂的过电位仅为189 mV，催化剂可连续提供100 mA cm(-2)的电流，并在1.0M KOH中恒定80h以上。实验表明，Fe3+浸渍对催化剂的形态生长有间接调节作用，为设计更好的OER催化剂提供了新的思路。(C)2021年氢能出版物有限责任公司。爱思唯尔有限公司出版。保留所有权利。
A NiFe alloy was designed on nickel foam (NF) as a precursor using cathodic electrode position. NiFe2O4-Ni3S2 nanorods (NRs) composite catalysts were prepared by Fe3+ impregnation and further hydrothermal sulfuration methods. NiFe2O4-Ni3S2 nanosheets (NSs) were also prepared by direct hydrothermal sulfuration of the NiFe alloy for comparison. Compared to the dense NS structure of the NiFe2O4-Ni3S2 NSs/NF, the NiFe2O4-Ni3S2 NRs/NF showed better oxygen evolution performance due to its unique weed-like NR array structure composed of additional oxygen evolution reaction (OER) active sites, with a strong electron interaction for Ni and Fe and the active sulfide synergistic effect with oxides. Therefore, Driving a current density of 10 mA cm(-2) only requires an overpotential of 189 mV and the catalyst could provide 100 mA cm(-2) continuously and be constant for more than 80 h in 1.0 M KOH. This experiment indicated that Fe3+ immersion had an indirect regulating effect on the morphological growth of the catalyst, which provided a novel concept for designing better OER catalysts. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.