{"title":"CeO2‐Accelerated Surface Reconstruction of CoSe2 Nanoneedle Forms Active CeO2@CoOOH Interface to Boost Oxygen Evolution Reaction for Water Splitting","authors":"Quanxin Guo, Yu Li, Zhengrong Xu, Rui Liu","doi":"10.1002/aenm.202403744","DOIUrl":null,"url":null,"abstract":"Interface engineering is an efficient strategy to create high‐performance electrocatalysts for water splitting. In the present work, CeO<jats:sub>2</jats:sub>@CoSe<jats:sub>2</jats:sub> nanoneedle on carbon cloth (CeO<jats:sub>2</jats:sub>@CoSe<jats:sub>2</jats:sub>/CC) demonstrates high efficiency for oxygen evolution reaction (OER) and water splitting. CeO<jats:sub>2</jats:sub> with abundant O vacancies facilitates the adsorption of OH<jats:sup>−</jats:sup> and boosts the reconstruction of CoSe<jats:sub>2</jats:sub> into CoOOH at lower potentials. The in situ generated active CeO<jats:sub>2</jats:sub>@CoOOH heterointerface upshifts the d‐band center of Co site, thereby decreasing the free energy of rate‐determining step (RDS) (<jats:sup>*</jats:sup>O to <jats:sup>*</jats:sup>OOH) during the OER process. It delivers a low OER overpotential of 245 mV at 10 mA cm<jats:sup>−2</jats:sup>. CeO<jats:sub>2</jats:sub>@CoSe<jats:sub>2</jats:sub>/CC is also found to be active for hydrogen evolution reaction (HER, 138 mV overpotential at 10 mA cm<jats:sup>−2</jats:sup>), profiting from CeO<jats:sub>2</jats:sub>‐facilitated <jats:sup>*</jats:sup>H<jats:sub>2</jats:sub>O dissociation and <jats:sup>*</jats:sup>H adsorption on CoSe<jats:sub>2</jats:sub>. The overall water splitting is achieved over the CeO<jats:sub>2</jats:sub>@CoSe<jats:sub>2</jats:sub>/CC bifunctional electrode with a low electrolysis voltage of 1.54 V at 10 mA cm<jats:sup>−2</jats:sup>. This work offers valuable insights into CeO<jats:sub>2</jats:sub>‐assisted surface reconstruction as well as provides water electrolysis catalysts through interface engineering.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":"19 1","pages":""},"PeriodicalIF":24.4000,"publicationDate":"2024-11-11","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.202403744","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
Interface engineering is an efficient strategy to create high‐performance electrocatalysts for water splitting. In the present work, CeO2@CoSe2 nanoneedle on carbon cloth (CeO2@CoSe2/CC) demonstrates high efficiency for oxygen evolution reaction (OER) and water splitting. CeO2 with abundant O vacancies facilitates the adsorption of OH− and boosts the reconstruction of CoSe2 into CoOOH at lower potentials. The in situ generated active CeO2@CoOOH heterointerface upshifts the d‐band center of Co site, thereby decreasing the free energy of rate‐determining step (RDS) (*O to *OOH) during the OER process. It delivers a low OER overpotential of 245 mV at 10 mA cm−2. CeO2@CoSe2/CC is also found to be active for hydrogen evolution reaction (HER, 138 mV overpotential at 10 mA cm−2), profiting from CeO2‐facilitated *H2O dissociation and *H adsorption on CoSe2. The overall water splitting is achieved over the CeO2@CoSe2/CC bifunctional electrode with a low electrolysis voltage of 1.54 V at 10 mA cm−2. This work offers valuable insights into CeO2‐assisted surface reconstruction as well as provides water electrolysis catalysts through interface engineering.
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.