NiCoO2 nanowires grown on carbon fiber paper for highly efficient water oxidation
NiCoO2 nanowires grown on carbon fiber paper for highly efficient water oxidation
复制标题
DOI：
10.1016/j.electacta.2015.05.159
复制
发表时间：
2015-08
影响因子：
6.6
通讯作者：
Yang Yang-Yang;Ming Zhou;Wenlong Guo;X. Cui;Yanhong Li;Feila Liu;P. Xiao;Yunhuai Zhang
中科院分区：
文献类型：
--
作者：
Yang Yang-Yang;Ming Zhou;Wenlong Guo;X. Cui;Yanhong Li;Feila Liu;P. Xiao;Yunhuai Zhang
水氧化是分解水制备氢燃料的关键步骤。我们报道了一种由碳纤维纸上生长的NiCoO2纳米线组成的杂化材料(记为NiCoO2@CFP)作为高效析氧反应(OER)电催化剂。在0.1MKOH中，高纳米结构的NiCoO2催化剂在电流密度为10 mA/cm∼2时呈现出0.303−的小过电势，∼57 mV/−1的低塔菲尔斜率，与商业珍贵的RuO2催化剂相当。这种良好的OER性能可能是由于NiCoO2纳米线和CFP衬底的氯化钠结构，在催化过程中促进了活性Ni-Co层状氢氧化物/氧氢氧化物物种的形成。此外，NiCoO2@CFP的三维排列结构对OER的高催化活性起到了重要作用。这些优点与杂化材料令人满意的稳定性相结合，表明它是一种很有前途的水氧化材料。
Water oxidation is a critical step in water splitting to make hydrogen fuel. We report a hybrid material consisting of NiCoO2nanowires grown on carbon fiber paper (denoted as NiCoO2@CFP) as a highly efficient oxygen evolution reaction (OER) electrocatalyst. In 0.1 M KOH, the highly nanostructured NiCoO2catalyst presents a small overpotential of ∼0.303 V at a current density of 10 mA cm−2and a low Tafel slope of ∼57 mV dec−1, comparable to the commercial precious RuO2catalyst. Such a good performance for OER may be attributed to the NaCl-type structure of the NiCoO2nanowires and CFP substrate, which can boost the formation of active Ni-Co layered hydroxide/oxyhydroxide species during the catalysis process. Additionally, the aligned 3D structure of NiCoO2@CFP plays an important role in the high catalytic activity for OER. These merits combined with the satisfactory stability of the hybrid material indicate that it is a promising material for water oxidation.