Eugene Kim, Sungsoon Kim, Yongchul Kim, Kiran Hamkins, Jihyun Baek, MinJoong Kim, Tae‐Kyung Liu, Young Moon Choi, Jung Hwan Lee, Gyu Yong Jang, Kug‐Seung Lee, Geunsik Lee, Xiaolin Zheng, Jong Hyeok Park
{"title":"Activation of Hidden Catalytic Sites in 2D Basal Plane via p–n Heterojunction Interface Engineering Toward Efficient Oxygen Evolution Reaction","authors":"Eugene Kim, Sungsoon Kim, Yongchul Kim, Kiran Hamkins, Jihyun Baek, MinJoong Kim, Tae‐Kyung Liu, Young Moon Choi, Jung Hwan Lee, Gyu Yong Jang, Kug‐Seung Lee, Geunsik Lee, Xiaolin Zheng, Jong Hyeok Park","doi":"10.1002/aenm.202403722","DOIUrl":null,"url":null,"abstract":"Nonprecious metal‐based 2D materials have shown promising electrocatalytic activity toward the oxygen evolution reaction (OER). However, the catalytically active sites of 2D materials are mainly presented at the edge, and most of their basal planes are still catalytically inactive, which turns into a significant drawback on the catalytic efficiency. Here, a novel p–n heterojunction strategy is suggested that generates active sites on the basal plane of 2D NiFe‐layered double hydroxide (NiFe‐LDH). The n‐type NiFe‐LDH is first grown on a nickel foam (NF) substrate, and p‐type Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub> nanocubes are deposited through a simple dip‐coating method to fabricate a Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>/NiFe‐LDH@NF p–n heterojunction electrode. As a result, electron transfer is induced at the interface of p‐type Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub> and n‐type NiFe‐LDH, which consequently promotes oxidation of the inert Ni<jats:sup>2+</jats:sup> state to a more catalytically active Ni<jats:sup>3+</jats:sup> state on the inert basal plane of NiFe‐LDH. As‐prepared Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>/NiFe‐LDH@NF electrodes obtained enhanced OER performance showing a high current density of 100 mA cm<jats:sup>−2</jats:sup> at 1.48 V (vs RHE) which outperforms that of pristine NiFe‐LDH@NF. The utilization of the p–n junction concept will disclose a new strategy for modifying the electronic structure of the catalytically inactive basal plane and stimulating its electrocatalytic activity.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":null,"pages":null},"PeriodicalIF":24.4000,"publicationDate":"2024-11-12","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.202403722","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
Nonprecious metal‐based 2D materials have shown promising electrocatalytic activity toward the oxygen evolution reaction (OER). However, the catalytically active sites of 2D materials are mainly presented at the edge, and most of their basal planes are still catalytically inactive, which turns into a significant drawback on the catalytic efficiency. Here, a novel p–n heterojunction strategy is suggested that generates active sites on the basal plane of 2D NiFe‐layered double hydroxide (NiFe‐LDH). The n‐type NiFe‐LDH is first grown on a nickel foam (NF) substrate, and p‐type Co3O4 nanocubes are deposited through a simple dip‐coating method to fabricate a Co3O4/NiFe‐LDH@NF p–n heterojunction electrode. As a result, electron transfer is induced at the interface of p‐type Co3O4 and n‐type NiFe‐LDH, which consequently promotes oxidation of the inert Ni2+ state to a more catalytically active Ni3+ state on the inert basal plane of NiFe‐LDH. As‐prepared Co3O4/NiFe‐LDH@NF electrodes obtained enhanced OER performance showing a high current density of 100 mA cm−2 at 1.48 V (vs RHE) which outperforms that of pristine NiFe‐LDH@NF. The utilization of the p–n junction concept will disclose a new strategy for modifying the electronic structure of the catalytically inactive basal plane and stimulating its electrocatalytic activity.
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.