Highly Active Mixed-Metal Nanosheet Water Oxidation Catalysts Made by Pulsed-Laser Ablation in Liquids
Highly Active Mixed-Metal Nanosheet Water Oxidation Catalysts Made by Pulsed-Laser Ablation in Liquids
复制标题
DOI：
10.1021/ja506087h
复制
发表时间：
2014-09-24
影响因子：
15
通讯作者：
Mueller, Astrid M.
中科院分区：
文献类型：
--
作者：
Hunter, Bryan M.;Blakemore, James D.;Mueller, Astrid M.
采用脉冲激光液相烧蚀法制备了无表面活性剂的混合金属氢氧化物水氧化纳米催化剂。在[Ni 1-xFex（OH）（2）]（NO3）（y）（OH）（x-y）中心点nH（2）O系列[Ni-Fe]-层状双氢氧化物中，当Fe的含量降低到22%时，活性较高。Ti ~（4+）和La ~（3+）离子的加入进一步增强了电催化作用，在10 mA cm ~（-2）时的最低过电位为260 mV。电催化水氧化活性的增加与405.1 eV的N 1 s（XPS结合能）的纳米片物种的相对比例。
Surfactant-free mixed-metal hydroxide water oxidation nanocatalysts were synthesized by pulsed-laser ablation in liquids. In a series of [Ni-Fe]-layered double hydroxides with intercalated nitrate and water, [Ni1-xFex(OH)(2)](NO3)(y)(OH)(x-y)center dot nH(2)O, higher activity was observed as the amount of Fe decreased to 22%. Addition of Ti4+ and La3+ ions further enhanced electrocatalysis, with a lowest overpotential of 260 mV at 10 mA cm(-2). Electrocatalytic water oxidation activity increased with the relative proportion of a 405.1 eV N 1s (XPS binding energy) species in the nanosheets.