具有卓越双功能活性的高耐久性多孔氧化镍电极，可用于可扩展的碱性水电解

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2024-12-18 DOI:10.1016/j.cej.2024.158738

Shukai Diao, Tianwen Wang, Wen Kuang, Su Yan, Xiaotian Zhang, Mingxuan Chen, Ying Liu, Aidong Tan, Tianrang Yang, Jianguo Liu

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引用次数: 0

摘要

碱性水电解（AWE）是一种领先的 "绿色制氢 "技术。工业电极使用碱浸法去除镍铝合金中的铝，形成孔隙并增加比表面积（SSA），但电极性能仍然较差。本研究提出了一种制造高效双功能电极的方法。该工艺包括通过还原氧化镍在镍网（NM）上形成具有高比表面积的多孔镍层，从而促进镍（OH）2 纳米片的形成。由此产生的 Ni/Ni(OH)2@NM 电极具有亲水性、斥气性和高电化学活性表面。它的氢气和氧气进化反应过电位很低（100 mA/cm2 时分别为 164 mV 和 337 mV）。使用 Ni/Ni(OH)2@NM 电极的电解槽经过 2000 小时的耐久性测试后，在 80 °C 条件下仅需 1.695 V 即可达到 300 mA/cm2。该电极在频繁的启动-停止循环中也表现出卓越的稳定性，因此非常适合与间歇性可再生能源集成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Highly durable porous NiO-derived electrodes with superior bifunctional activity for scalable alkaline water electrolysis

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Highly durable porous NiO-derived electrodes with superior bifunctional activity for scalable alkaline water electrolysis

Alkaline water electrolysis (AWE) is a leading “green hydrogen” production technology. Industrial electrodes use alkaline leaching to remove Al from NiAl alloy, creating pores and increasing specific surface area (SSA) but still suffer from poor electrode performance. This study presents a method for fabricating an efficient bifunctional electrode. The process involves creating a porous Ni layer with high SSA on nickel mesh (NM) by reducing NiO, which facilitates the formation of Ni(OH)₂ nanosheets. The resulting Ni/Ni(OH)₂@NM electrode features a hydrophilic, gas-repellent and highly electrochemically active surface. It achieves low overpotentials for hydrogen and oxygen evolution reactions (164 mV and 337 mV at 100 mA/cm², respectively). The electrolyzer using Ni/Ni(OH)₂@NM electrodes only requires 1.695 V to achieve 300 mA/cm² at 80 °C after a 2000 h durability test. The electrode also demonstrates excellent stability under frequent start-stop cycles, making it well-suited for integration with intermittent renewable energy sources.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.