{"title":"Novel Ru-O3Se4 Single Atoms Regulate the Charge Redistribution at Ni3Se2/FeSe2 Interface for Improved Overall Water Splitting in Alkaline Media","authors":"Linke Guo, Tianpeng Liu, Le Zhang, Mengyao Ma, Peng Gao, Dong Cao, Daojian Cheng","doi":"10.1002/aenm.202402558","DOIUrl":null,"url":null,"abstract":"Developing low-cost, highly active, and stable bifunctional catalysts is of great significance for electrochemical water splitting. Herein, novel Ru-O<sub>3</sub>Se<sub>4</sub> single atoms doped Ni<sub>3</sub>Se<sub>2</sub>/FeSe<sub>2</sub> interface catalyst is fabricated by a two-step method for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Notably, Ru-Ni<sub>3</sub>Se<sub>2</sub>/FeSe<sub>2</sub> nanosheets exhibit excellent HER (43 mV@10 mA cm<sup>−2</sup>) and OER (283 mV@100 mA cm<sup>−2</sup>) activities in alkaline solution. In particular, the mass activity of Ru-Ni<sub>3</sub>Se<sub>2</sub>/FeSe<sub>2</sub> catalyst is 3593.61 mA mg <sub>Ru</sub><sup>−1</sup> at 200 mV for HER and 7073.80 mA mg<sub>Ru</sub><sup>−1</sup> at 400 mV for OER, which is 25.91 and 367.28 times of commercial Pt/C and RuO<sub>2</sub>, respectively. In situ spectroscopy techniques confirm Ru-O<sub>3</sub>Se<sub>4</sub> single atoms facilitate the adsorption of intermediates H<sup>*</sup> and OOH<sup>*</sup> during HER and OER processes, respectively. Further density functional theory calculations reveal introducing Ru-O<sub>3</sub>Se<sub>4</sub> single atoms causes the transfer of electrons from Ru to Ni and Fe atoms, leading to a redistribution of charge at the Ni<sub>3</sub>Se<sub>2</sub>/FeSe<sub>2</sub> interface, thus reducing the energy barriers of rate-determining step to −0.37 and 1.92 eV for HER and OER, respectively. This work emphasizes the significant role of single atoms at the interface for overall water splitting.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"29 1","pages":""},"PeriodicalIF":24.4000,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/aenm.202402558","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Developing low-cost, highly active, and stable bifunctional catalysts is of great significance for electrochemical water splitting. Herein, novel Ru-O3Se4 single atoms doped Ni3Se2/FeSe2 interface catalyst is fabricated by a two-step method for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Notably, Ru-Ni3Se2/FeSe2 nanosheets exhibit excellent HER (43 mV@10 mA cm−2) and OER (283 mV@100 mA cm−2) activities in alkaline solution. In particular, the mass activity of Ru-Ni3Se2/FeSe2 catalyst is 3593.61 mA mg Ru−1 at 200 mV for HER and 7073.80 mA mgRu−1 at 400 mV for OER, which is 25.91 and 367.28 times of commercial Pt/C and RuO2, respectively. In situ spectroscopy techniques confirm Ru-O3Se4 single atoms facilitate the adsorption of intermediates H* and OOH* during HER and OER processes, respectively. Further density functional theory calculations reveal introducing Ru-O3Se4 single atoms causes the transfer of electrons from Ru to Ni and Fe atoms, leading to a redistribution of charge at the Ni3Se2/FeSe2 interface, thus reducing the energy barriers of rate-determining step to −0.37 and 1.92 eV for HER and OER, respectively. This work emphasizes the significant role of single atoms at the interface for overall water splitting.
期刊介绍:
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.