Title: Post-Synthetic Treatment of Nickel-Iron Layered Double Hydroxides for the Optimum Catalysis of the Oxygen Evolution Reaction Show Chinese title

Title: 镍-铁层状双氢氧化物的后合成处理用于氧气释放反应的最佳催化

Abstract: Nickel-iron layered double hydroxide (NiFe LDH) platelets with high morphological regularity and sub-micrometre lateral dimensions were synthesized using a homogeneous precipitation technique for highly efficient catalysis of the oxygen evolution reaction (OER). Considering edge sites are the point of activity, efforts were made to control platelet size within the synthesized dispersions. The goal is to controllably isolate and characterize size-reduced NiFe LDH particles. Synthetic approaches for size control of NiFe LDH platelets have not been transferable based on published work with other LDH materials and for that reason, we instead use post-synthetic treatment techniques to improve edge-site density. In the end, size reduced NiFe LDH/single-wall carbon nanotube (SWCNT) composites allowed to further reduce the OER overpotential to 237 plus/minus 7 mV ( L = 0.16 plus/minus 0.01 micrometres, 20 wt% SWCNT), which is one of the best values reported to date. This approach as well improved the long term activity of the catalyst in operating conditions. Show Chinese abstract

Abstract: 镍铁层状双氢氧化物（NiFe LDH）片状结构，具有高度形态规则性和亚微米级的横向尺寸，使用均匀沉淀技术合成，用于高效催化氧析出反应（OER）。 考虑到边缘位点是活性点，努力控制片状结构在合成分散液中的尺寸。 目标是可控地分离和表征尺寸减小的NiFe LDH粒子。 对于NiFe LDH片状结构尺寸控制的合成方法，基于其他LDH材料的已发表工作尚未具有可转移性，因此我们采用后合成处理技术来提高边缘位点密度。 最终，尺寸减小的NiFe LDH/单壁碳纳米管（SWCNT）复合材料进一步将OER过电位降低至237加减7 mV（L = 0.16加减0.01微米，20 wt% SWCNT），这是迄今为止报道的最佳值之一。 这种方法也改善了催化剂在操作条件下的长期活性。