Multiple interface coupling triggered built-in electric field over double-sandwiched RGO/cobalt silicate/cobalt-iron phosphide for improving the overall water-splitting performance

影响因子：6.1

DOI码：10.1039/d4qi02987a

发表刊物：Inorganic Chemistry Frontiers

摘要：The exploration of efficient and durative bifunctional electrocatalysts for overall water splitting (OWS) is critical for hydrogen production in clean energy applications. Herein, a novel double-sandwiched architecture of reduced graphene oxide (rGO), cobalt silicate (CS), and cobalt-iron phosphides, denoted as rGO/CS/(Co,Fe)xPy, is designed to enhance both the oxygen evolution reaction (OER) and hydrogen ER (HER) in alkaline media. The formation of Co2P and Fe2P on rGO/CS not only protects the silicate from alkaline corrosion, but also generates dual-active centers that synergistically improve the conductivity and catalytic activity. Multiple interface coupling between rGO, CS, and (Co,Fe)xPy triggers a built-in electric field, which significantly enhances charge separation, electron transport, and reaction kinetics. This built-in electric field lowers the energy barrier for HER by facilitating H-OH bond dissociation and accelerates the OER by promoting OH- adsorption. The rGO/CS/(Co,Fe)xPy catalyst achieves overpotentials of 256 mV (OER) and 180 mV (HER) at 10 mA cm-2, surpassing most reported catalysts and rivaling commercial Pt/C and RuO2. Furthermore, the rGO/CS/(Co,Fe)xPy (+/-) demonstrates a low OWS voltage of 1.41 V. The current work provides a new approach to catalyst design through interface engineering and electric field optimization, offering a scalable solution for sustainable hydrogen production.

合写作者：Tan Xianfang,Pei xiaoyu,Wang Yang,Yi shengping,Wang Qiushi,Zhang Xiaoming

论文类型：期刊论文

通讯作者：Meng Changgong*,Huang Chi*

文献类型：J

卷号：12

期号：6

页面范围：2439-2452

ISSN号：2052-1553

是否译文：否

发表时间：2025-01-24

收录刊物：SCI

发布期刊链接：http://doi.org/10.1039/d4qi02987a

附件：

 1.Inorg Chem Front-2025-12-2439 .pdf