Activation of Hidden Catalytic Sites in 2D Basal Plane via p–n Heterojunction Interface Engineering Toward Efficient Oxygen Evolution Reaction

IF 24.4 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
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
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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.
通过 p-n 异质结界面工程激活二维基底面中的隐藏催化位点,实现高效氧进化反应
非贵金属基二维材料在氧进化反应(OER)中表现出了良好的电催化活性。然而,二维材料的催化活性位点主要分布在边缘,其大部分基底平面仍然没有催化活性,这成为影响催化效率的一个重大缺陷。本文提出了一种新型 p-n 异质结策略,在二维镍铁层双氢氧化物(NiFe-LDH)的基底面上产生活性位点。首先在泡沫镍(NF)衬底上生长出 n 型 NiFe-LDH,然后通过简单的浸涂方法沉积出 p 型 Co3O4 纳米立方体,从而制造出 Co3O4/NiFe-LDH@NF p-n 异质结电极。结果,在 p 型 Co3O4 和 n 型 NiFe-LDH 的界面上诱导了电子转移,从而促进了 NiFe-LDH 惰性基底面上的惰性 Ni2+ 态氧化为催化活性更强的 Ni3+ 态。As 制备的 Co3O4/NiFe-LDH@NF 电极获得了更高的 OER 性能,在 1.48 V 时的电流密度高达 100 mA cm-2(相对于 RHE),优于原始 NiFe-LDH@NF 电极。p-n 结概念的利用将为改变催化不活跃基底面的电子结构和激发其电催化活性提供一种新策略。
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来源期刊
Advanced Energy Materials
Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
41.90
自引率
4.00%
发文量
889
审稿时长
1.4 months
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.
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