Poly(3-thiophenemalonic acid) Modified NiFe Layered Double Hydroxide Electrocatalyst for Stable Seawater Oxidation at an Ampere-Scale Current Density

IF 8.7 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Materials Letters Pub Date : 2024-10-31 DOI:10.1021/acsmaterialslett.4c02054

Chaoxin Yang, Liyun Bi, Zhengwei Cai, Zixiao Li, Shengjun Sun, Xiaoyan Wang, Min Zhang, Meng Yue, Dongdong Zheng, Yongsong Luo, Mohamed S. Hamdy, Asmaa Farouk, Yongchao Yao*, Xuping Sun* and Bo Tang*,

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Abstract

Seawater electrolysis shows potential for sustainable hydrogen production but faces challenges from the high concentration of Cl^–, which leads to corrosion and performance degradation. In this study, we prepared a NiFe layered double hydroxide (NiFe LDH) nanoarray modified with poly(3-thiophenemalonic acid) (PTPA) on Ni foam (NiFe LDH@PTPA/NF) to enhance alkaline seawater oxidation (ASO). PTPA serves as a conductive and protective layer, improving electrical conductivity and repelling Cl^– to increase stability. The electrode demonstrated stable operation at 1000 mA cm^–² with low overpotential for 600 h, generating minimal chlorine. In situ Raman spectroscopy confirmed that PTPA facilitates active site formation and provides Cl^– protection, while inductively coupled plasma-optical emission spectrometry analysis indicated reduced Ni and Fe leaching. This study highlights the potential of conductive polymers to enhance ASO performance and durability.

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聚（3-噻吩丙二酸）改性NiFe层状双氢氧化物电催化剂在安培电流密度下稳定的海水氧化

海水电解显示出可持续制氢的潜力，但面临高浓度Cl -的挑战，Cl -会导致腐蚀和性能下降。在本研究中，我们在Ni泡沫（NiFe LDH@PTPA/NF）上制备了聚（3-噻吩丙二酸）（PTPA）修饰的NiFe层状双氢氧化物（NiFe LDH）纳米阵列，以增强碱性海水氧化（ASO）。PTPA作为导电和保护层，提高电导率和排斥Cl -，以增加稳定性。该电极在1000 mA cm-2的低过电位下稳定工作600小时，产生最少的氯。原位拉曼光谱证实了PTPA促进活性位点的形成并提供Cl保护，而电感耦合等离子体光学发射光谱分析表明，PTPA减少了Ni和Fe的浸出。这项研究强调了导电聚合物在提高ASO性能和耐久性方面的潜力。

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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.

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