Porous Two-Dimensional Nanosheets Converted from Layered Double   Hydroxides and Their Applications in Electrocatalytic Water Splitting

doi:10.1021/acs.chemmater.5b02177

CORC > 北京大学 > 化学与分子工程学院

	Porous Two-Dimensional Nanosheets Converted from Layered Double Hydroxides and Their Applications in Electrocatalytic Water Splitting
	Liang, Hanfeng ; Li, Linsen ; Meng, Fei ; Dang, Lianna ; Zhuo, Junqiao ; Forticaux, Audrey ; Wang, Zhoucheng ; Jin, Song
刊名	CHEMISTRY OF MATERIALS
	2015
关键词	HYDROGEN-EVOLUTION REACTION EFFICIENT OXYGEN EVOLUTION LITHIUM-ION BATTERIES CO3O4 NANOWIRE ARRAYS CARBON-FIBER PAPER SCREW DISLOCATIONS ENERGY-CONVERSION ALPHA-FE2O3 NANOWIRES NICKEL-HYDROXIDE SOLUTION GROWTH
DOI	10.1021/acs.chemmater.5b02177
英文摘要	Porous materials are of particular interest due to their high surface area and rich edge sites, which are favorable for applications such as catalysis. Although there are well-established strategies for synthesizing porous metal oxides (e.g., by annealing the corresponding metal hydroxides), facile and scalable routes to porous metal hydroxides and metal chalcogenides are lacking. Here, we report a simple and general strategy to synthesize porous nanosheets of metal hydroxides by selectively etching layered double hydroxide (LDH) nanoplate precursors that contain amphoteric metal and to further convert them into porous metal chalcogenides by a solution method. Using NiGa LDH as an example, we show that the thin nanoplates with high surface accessibility facilitate the topotactic conversion of NiGa LDH to beta-Ni(OH), and further to NiSe, with porous texture while preserving the sheet-like morphology. The converted beta-Ni(OH), and NiSe2 are highly active for electrocatalytic oxygen evolution reaction and hydrogen evolution reaction (HER), respectively, which demonstrates the applications of such high surface area porous nanostructures with rich edge sites. Particularly, the porous NiSe2 nanosheets exhibited excellent catalytic activity toward HER with low onset overpotential, small Tafel slope, and good stability under both acidic and alkaline conditions. Overall electrochemical water splitting experiments using these porous beta-Ni(OH)(2) and NiSe, nanosheets were further demonstrated. Our work presents a new strategy to prepare porous nanomaterials and to further enhance their catalytic and other applications.; NSF [DMR-1106184]; Research Corporation SciaLog Award; UW-Madison H. I. Romnes Faculty Fellowship; China Scholarship Council; National Natural Science Foundation of China [51372212]; SCI(E); EI; ARTICLE; zcwang@xmu.edu.cn; jin@chem.wisc.edu; 16; 5702-5711; 27
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/417089]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Liang, Hanfeng,Li, Linsen,Meng, Fei,et al. Porous Two-Dimensional Nanosheets Converted from Layered Double Hydroxides and Their Applications in Electrocatalytic Water Splitting[J]. CHEMISTRY OF MATERIALS,2015.
APA	Liang, Hanfeng.,Li, Linsen.,Meng, Fei.,Dang, Lianna.,Zhuo, Junqiao.,...&Jin, Song.(2015).Porous Two-Dimensional Nanosheets Converted from Layered Double Hydroxides and Their Applications in Electrocatalytic Water Splitting.CHEMISTRY OF MATERIALS.
MLA	Liang, Hanfeng,et al."Porous Two-Dimensional Nanosheets Converted from Layered Double Hydroxides and Their Applications in Electrocatalytic Water Splitting".CHEMISTRY OF MATERIALS (2015).