Graphene oxide guiding the constructing of nickel-iron layered double hydroxides arrays as a desirable bifunctional electrocatalyst for HER and OER |
| |
| Affiliation: | 1. Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China;2. State Key of Powder Metallurgy Laboratory, Central South University, Changsha 410083, China;1. State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China;2. Department of Electronics, Baotou Teachers'' College, Baotou 014030, China;3. Key Laboratory of Magnetism and Magnetic Materials at Universities of Inner Mongolia Autonomous Region, Baotou Teachers'' College, Baotou 014030, China;1. School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, People’s Republic of China;2. School of Science, North University of China, Taiyuan 030051, People’s Republic of China;1. Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China;2. ARC Centre of Excellence for Nanoscale BioPhotonics (CNBP), School of Chemistry and Physics, The University of Adelaide, Adelaide, SA, 5005, Australia;1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China;2. Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China |
| |
| Abstract: | It is accepted that the electrocatalytic activity is correlated to the morphology. Here, graphene oxide guiding nickel and iron layered double hydroxides hybrid arrays (GO-FeNi-LDH) are firstly fabricated by one-step electro-deposition method. The pretty 3D arrays with sheets vertically growing on nickel foam (NF) are highlighted by controlling the quantity of GO. Furthermore, the electron transfer from Ni, Fe to graphene is detected, making the metals and graphene in high valence and electron-rich state, respectively. The optimal GO-FeNi-LDH presents pretty morphology, defects, electron interactions and good conductivity. Therefore, to achieve 10 and 100 mA cm−2, it requires the overpotentials of 119, 210, 285 and 303 mV for HER and OER and excellent durability. Noticeably, the optimal GO-NiFe-LDH needs a cell voltage of 1.48 V to drive 10 mA cm−2 for the whole water splitting, which are lower than that of most of advanced electrocatalysts, endowing it in first-rank electrocatalyst. |
| |
| Keywords: | Layered double hydroxides Graphene Hydrogen evolution reaction Oxygen reduction reaction Water splitting |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
