A highly efficient heterostructure nanorod bifunctional electrocatalyst for realizing enhanced overall water splitting at a large current density†

IF 9.5 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Derun Li, Shixin Wu, Tao Jiang, Shuangshuang Huang, Zhaowu Wang, Hengyi Wu, Guangxu Cai and Feng Ren
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Abstract

Exploring efficient, low cost and stable electrocatalysts working at large current densities is crucial for upgrading the current industrial electrochemical water splitting. Herein, a novel FeS2/Fe–Ni3S2 heterostructure was successfully prepared via a simple one-step in situ hydrothermal vulcanization using F regulation engineering. The FeS2/Fe–Ni3S2 heterostructure array exhibits low overpotentials for both the OER (180 mV @ 10 mA cm−2 and 300 mV @ 1 A cm−2) and the HER (105 mV @ 10 mA cm−2 and 344 mV @ 1 A cm−2) with high stability operating at 1 A cm−2 for 1000 h. In addition, the water-splitting system only needs 1.5 V to reach 10 mA cm−2 and shows prolonged stability of more than 1200 h at 1 A cm−2. The DFT calculations show that the electrons redistribute at the interface and favor the chemisorption of hydrogen and oxygen-containing intermediates. This work highlights a novel, low cost and practical electrode for industrial electrochemical water splitting.

Abstract Image

一种高效的异质结构纳米棒双功能电催化剂,可在大电流密度†下实现增强的整体水分解
探索高效、低成本、稳定的大电流密度电催化剂是提高当前工业电化学水分解技术的关键。本文利用F -调控工程,通过简单的一步原位水热硫化,成功制备了一种新型的FeS2/ Fe-Ni3S2异质结构。FeS2 / Fe-Ni3S2异质结构数组展品低超电势的OER(马180 mV @ 10厘米−2和300 mV @ 1厘米−2)和她的马(105 mV @ 10厘米−2和344 mV @ 1厘米−2)与高稳定性操作在1厘米−2 1000 h。此外,水分解系统只需要1.5 V马达到10厘米−2和显示长期稳定超过1200 h 1厘米−2。DFT计算表明,电子在界面处重新分布,有利于含氢和含氧中间体的化学吸附。本工作为工业电化学水分解提供了一种新颖、低成本、实用的电极。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Materials Chemistry A
Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
19.50
自引率
5.00%
发文量
1892
审稿时长
1.5 months
期刊介绍: The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.
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