碱性海水中 Pd@CoP 的氢溢出促进氢气进化电催化作用

IF 8.7 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-07-29 DOI:10.1021/acsmaterialslett.4c01040

Xiaoyan Wang, Yuxuan He, Quanzhi Zhang, Shengjun Sun, Zixiao Li, Zhengwei Cai, Chaoxin Yang, Meng Yue, Min Zhang, Hefeng Wang, Asmaa Farouk, Mohamed S. Hamdy, Jianming Hu, Xuping Sun, Bo Tang

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引用次数: 0

摘要

开发高效稳定的氢进化反应（HER）电催化剂对于实现有效的海水电解制氢至关重要。氢溢出可以促进氢物种在不同位点之间的迁移，从而提高催化性能，改善氢进化反应的反应效率和动力学。在此，我们报告了在泡沫镍（Pd@CoP/NF）上水热-磷化-浸泡合成 Pd 装饰 CoP 纳米针状阵列作为高活性 HER 电催化剂用于碱性海水还原的情况。原位电化学阻抗谱和动力学同位素效应揭示了 Pd@CoP/NF 的广泛氢吸附性和更高的氢转移率。在碱性海水中，这种 Pd@CoP/NF 表现出卓越的性能，在电流密度为 1000 mA cm-2 时，过电位低至 249 mV，并且长期稳定性可达 500 h。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Hydrogen Spillover Boosted Hydrogen Evolution Electrocatalysis over Pd@CoP in Alkaline Seawater

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Hydrogen Spillover Boosted Hydrogen Evolution Electrocatalysis over Pd@CoP in Alkaline Seawater

Developing efficient and stable electrocatalysts for the hydrogen evolution reaction (HER) is crucial to achieve effective electrolytic hydrogen production from seawater. Hydrogen spillover enhances catalytic performance by facilitating the migration of hydrogen species between different sites, improving reaction efficiency and kinetics in the HER. Herein, we report the hydrothermal-phosphatization-immersion synthesis of Pd-decorated CoP nanoneedle arrays on nickel foam (Pd@CoP/NF) as a highly active HER electrocatalyst toward alkaline seawater reduction. In situ electrochemical impedance spectroscopy and kinetic isotope effects reveal Pd@CoP/NF’s extensive hydrogen adsorption and enhanced hydrogen transfer rates. In alkaline seawater, such Pd@CoP/NF exhibits outstanding performance with a low overpotential of 249 mV at a current density of 1000 mA cm^–2 and long-term stability for 500 h.

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.