Self-Supported Co-VS2@MoS2 Heterostructure for Boosting Overall Water Splitting

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2024-12-05 DOI:10.1021/acsaem.4c0246410.1021/acsaem.4c02464

Ping Yin, Ting Feng, Ting Lei* and Wen Fu,

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Abstract

It is highly desirable to develop highly effective and cost-efficient non-noble-metal electrocatalysts for water splitting. Herein, Co-doped VS₂@MoS₂ heterostructure with nanorod arrays morphology on nickel foam (Co-VS₂@MoS₂/NF) were synthesized by a facile hydrothermal method. The as-obtained Co-VS₂@MoS₂/NF heterostructure catalyst exhibits remarkably electrocatalytic activity as a bifunctional catalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1.0 M KOH, benefiting from largely exposed edge active sites, fast electron transport, and strong electronic interactions between MoS₂ and Co-VS₂. Co-VS₂@MoS₂/NF catalyst requires an overpotential of 73.4 and 161.3 mV at a current density of 10 mA cm^–2 for HER and OER, respectively. Furthermore, the electrolyzer with Co-VS₂@MoS₂/NF as both the cathode and the anode shows a low cell voltage of 1.53 V at 10 mA cm^–2 and excellent long-term durability.

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自支撑Co-VS2@MoS2异质结构促进整体水分裂

开发高效、经济的非贵金属水分解电催化剂是迫切需要的。本文采用水热法在泡沫镍（Co-VS2@MoS2/NF）上合成了具有纳米棒阵列形貌的共掺杂VS2@MoS2异质结构。Co-VS2@MoS2/NF异质结构催化剂在1.0 M KOH条件下表现出明显的析氢反应（HER）和析氧反应（OER）双功能催化剂的电催化活性，得益于大量暴露的边缘活性位点、快速的电子传递以及MoS2和Co-VS2之间的强电子相互作用。Co-VS2@MoS2/NF催化剂在电流密度为10 mA cm-2时，HER和OER的过电位分别为73.4和161.3 mV。此外，Co-VS2@MoS2/NF作为阴极和阳极的电解槽在10 mA cm-2时具有1.53 V的低电池电压和出色的长期耐用性。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.