Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/40738
Title: | Overall Water Splitting on The NiS/NiS2 Heterostructures Featuring Self-Equilibrium Orbital Occupancy | Authors: | Xu, Wenli Zhao, Rong Li , Qiqi Sun, Bing Wu, Jing Zhong, Wenda Gao, Yinhong Nan, Xu Huang, Qiang Yang , Yao Li, Xuanke YANG, Nianjun Zhang, Qin |
Issue Date: | 2023 | Publisher: | WILEY-V C H VERLAG GMBH | Source: | Advanced Energy Materials, 13 (31) | Abstract: | Efficient electrochemical overall water splitting requires bi-functional catalysts that work for both hydrogen and oxygen evolution reactions (HER/OER). A heterostructure is thus proposed to maintain its optimal interactions with H/O-containing intermediates. A so-called "orbital occupancy self-equilibrium" strategy is employed theoretically and experimentally to design such bi-functional catalysts, namely the incorporation of the V species into a NiS/NiS2 heterostructure. Owing to the variable valences of both Ni and V species, the electrons are controllably reoriented over the interfacial VSNi bond. The as-generated dynamic and self-equilibrium of the electron environment modify an optimal adsorption harmony toward various H/O-containing intermediates on this heterointerface, enhancing intrinsic activity and reaction kinetics for the HER, the OER, and overall water splitting. This V-NiS/NiS2 catalyst exhibits an overpotential of only 94 and 220 mV at a current density of 10 mV cm(-2) for the HER and the OER, respectively. This proposed strategy is expected to be workable for other catalysts with variable metal valences and provide insights for an agile interfacial electron allocation on heterostructure catalysts. | Notes: | Li, XK; Zhang, Q (corresponding author), Wuhan Univ Sci & Technol, Sch Chem & Chem Engn, Hubei Prov Key Lab Coal Convers & New Carbon Mat, Wuhan 430081, Peoples R China.; Yang, NJ (corresponding author), Hasselt Univ, Dept Chem, Agoralaan 1 Bldg, B-3590 Diepenbeek, Belgium.; Yang, NJ (corresponding author), Hasselt Univ, IMO IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. lixuanke@wust.edu.cn; nianjun.yang@uhasselt.be; zhangqin627@wust.edu.cn |
Keywords: | 3d orbital occupancy;heterostructure;overall water splitting;structural transformation;variable valence | Document URI: | http://hdl.handle.net/1942/40738 | ISSN: | 1614-6832 | e-ISSN: | 1614-6840 | DOI: | 10.1002/aenm.202300978 | ISI #: | 001019906300001 | Rights: | 2023 Wiley-VCH GmbH | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Overall Water Splitting on The NiS_NiS2 Heterostructures Featuring SelfâEquilibrium Orbital Occupancy.pdf Restricted Access | Published version | 3.84 MB | Adobe PDF | View/Open Request a copy |
Overall Water.pdf Until 2024-07-31 | Peer-reviewed author version | 1.94 MB | Adobe PDF | View/Open Request a copy |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.