Mo-doped Ni3S2 nanosheet arrays for boosting hydrogen evolution activity and supercapacitor energy storage

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2023-12-18 DOI:10.1063/5.0175478

Xiumei Song, Ranran He, Dongxuan Guo, Dawei Chu, Hongpeng Li, Lichao Tan

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引用次数: 0

Abstract

The design and preparation of bifunctional electrode materials play a vital role in the field of energy storage and conversion. Herein, Mo-doped Ni3S2 nanosheet arrays assembled on nickel foam (named as Mo-Ni3S2) are designed through three-step continuous hydrothermal methods for enhanced hydrogen evolution reaction (HER) and supercapacitor storage characteristics. The ultrathin Mo-Ni3S2 nanosheets structure could modulate electronic structure and offer rich actives sites, thereby expediting the mobility of charge carriers and engendering a greater density of active sites. Consequently, the Mo-Ni3S2 exhibits low overpotential both in alkaline and acidic solution with the value of 53 and 65 mV at the current density of 10 mA cm−2, respectively. Meanwhile, the HER activity can be well maintained after 17 h of continuous operation at 10 mA cm−2, demonstrating its excellent stability. Furthermore, the as-prepared Mo-Ni3S2 as pseudocapacitive materials exhibits a specific capacitance of 3528 F g−1 at 1 A g−1, implying outstanding long durability with 96.5% capacity retention after 3000 charge–discharge cycles. Overall, this work provides a viable strategy for the development of transition metal-based materials as efficient bifunctional catalysts.

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掺杂钼的 Ni3S2 纳米片阵列可提高氢气进化活性和超级电容器储能能力

双功能电极材料的设计和制备在能量存储和转换领域发挥着重要作用。本文通过三步连续水热法设计了掺杂钼的镍3S2纳米片阵列（命名为钼-镍3S2），用于增强氢进化反应（HER）和超级电容器储能特性。超薄 Mo-Ni3S2 纳米片结构可调节电子结构并提供丰富的活性位点，从而加快电荷载流子的迁移速度并产生更高密度的活性位点。因此，Mo-Ni3S2 在碱性和酸性溶液中均表现出较低的过电位，在电流密度为 10 mA cm-2 时分别为 53 mV 和 65 mV。同时，在 10 mA cm-2 电流密度下连续工作 17 小时后，HER 活性仍能保持良好，这表明其具有极佳的稳定性。此外，作为伪电容材料制备的 Mo-Ni3S2 在 1 A g-1 的条件下显示出 3528 F g-1 的比电容，这意味着其具有出色的长耐久性，在 3000 次充放电循环后仍能保持 96.5% 的容量。总之，这项工作为开发过渡金属基材料作为高效双功能催化剂提供了一种可行的策略。

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

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.