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Construction of hierarchical Prussian Blue Analogue phosphide anchored on Ni2P@MoOx nanosheet spheres for efficient overall water splitting
Affiliation:1. Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, People''s Republic of China;1. State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum (East China), Qingdao, 266580, PR China;2. Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China;1. International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;2. Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;3. Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan;4. Department of Energy and Materials Engineering, Dongguk University, Seoul 04620, South Korea;5. Australian Institute for Innovative Materials (AIIM), University of Wollongong, North Wollongong, NSW 2500, Australia;6. School of Chemical Engineering & Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia;7. Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea;1. State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering and Key Laboratory of Automobile Materials of MOE, Jilin University, No. 2699 Qianjin Street, Changchun 130012, Jilin, People''s Republic of China;2. College of Chemistry, Jilin University, No. 2699 Qianjin Street, Changchun 130012, Jilin, People''s Republic of China;1. State Key Laboratory of Chem/Bio-sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China;2. College of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210046, China;3. Department of Material Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
Abstract:In response to the energy crisis, molybdenum-based catalyst has been proposed as a high-performance electrocatalytic material due to its low price and excellent HER performance. However, in contrast with its excellent HER performance, its poor OER performance often limits practical application as a high-performance overall water splitting catalyst. In this study, Prussian blue analogue (PBA) is grown in-situ on molybdenum-based nanosheet spheres by a simple and ingenious method and then subjected to phosphorization. The resulting composite catalyst exhibits highly efficient overall water splitting performance, overpotentials at current densities of 10 mA cm?2 and 100 mA cm?2 for the HER and OER are ?61 mV and 268 mV, respectively. Moreover, an alkaline electrolyzer makes up by the catalyst both as positive and negative can reach a cell voltage 1.494 V at 10 mA cm?2 for the overall water splitting. This method has provided a new strategy to effective combine PBA and molybdenum-based catalyst.
Keywords:HER  OER  Prussian blue analog  In-situ grown  Nickel foam  Nickel phosphide
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