文献类型：期刊文献

英文题名：Hydrogel-Derived Honeycomb Ni3S4/N,P-C as an Efficient Oxygen Evolution Catalyst

作者：Hu, Xuejiao[1] Li, Tiancheng[3] Tang, Yidan[1] Wang, Yirong[1] Wang, Ao[2] Fu, Gengtao[1,4] Li, Xiaodong[1] Tang, Yawen[1]

第一作者：Hu, Xuejiao

通信作者：Wang, Ao

机构：[1] Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical, Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China; [2] Key Lab of Biomass Energy and Material, Jiangsu Province, National Engineering Lab. For Biomass Chemical Utilization, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, No. 16, Suojin 5th Village, Nanjing, 210042, China; [3] State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China; [4] School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore

年份：2019

卷号：25

期号：31

起止页码：7561-7568

外文期刊名：Chemistry - A European Journal

收录：EI(收录号：20192006919695);Scopus(收录号：2-s2.0-85065483482)

语种：英文

外文关键词：Aerogels - Binding sites - Carbon - Carbonization - Catalyst supports - Doping (additives) - Electrocatalysts - Electrochemistry - Electron transport properties - Energy conversion - Honeycomb structures - Hydrogels - Nanocatalysts - Nanoparticles - Oxygen - Oxygen evolution reaction - Porous materials - Sols

摘要：The development of high-efficiency electrocatalysts with low costs for the oxygen evolution reaction (OER) is essential, but remains challenging. Herein, a new synthetic process is proposed to prepare Ni3S4 particles embedded in N,P-codoped honeycomb porous carbon aerogels (Ni3S4/N,P-HPC) through a hydrogel approach. The preparation of Ni3S4/N,P-HPC begins with the sol–gel polymerization of tripolyphosphate, chitosan, and guanidine polymer that contains metal-binding sites, allowing for the uniform incorporation of Ni ions into the gel matrix, freeze-drying, and subsequent carbonization under an inert atmosphere. This synthesis resolves difficulties in synthesizing the pure Ni3S4 phase caused by the instability of Ni3S4 at high temperature, while affording good control of the porous structure and N,P-doping of carbon aerogels. The synergy between the structural advantages of N,P-carbon aerogels (such as easily accessible active sites, high specific surface area, and excellent electron transport) and the intrinsic electrochemical properties of Ni3S4 result in the outstanding OER performance of Ni3S4/N,P-HPC, with overpotentials as low as 0.37 V at 10 mA cm?2. The work outlined herein offers a simple and effective method for the development of carbon-based electrocatalysts for renewable energy conversion. ? 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim