通过掺入镍和微量铱提高惰性氧化锌的氧进化反应性能,以实现可扩展的工业级水分离催化剂

IF 7.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Seok-in Yoon, Da Young Kwon, Yonghwan Lee, Nochang Park
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引用次数: 0

摘要

开发高效耐用的电催化剂,通过氧进化反应(OER)从水裂解中制氢是一项重大挑战。为解决这一问题,我们设计了一种在泡沫镍(Ir/Ni-ZnO@NF)上掺入镍和微量 Ir 的 ZnO 异质电催化剂,该催化剂采用了一种简便且可扩展的浸涂方法,无需任何粘合剂。在 ZnO 主材料中掺入 Ir 和 Ni 能形成均匀的薄膜,不会产生表面裂纹,有利于残余应力松弛,并显著提高 OER 活性。我们的系统研究表明,增加 Ir/Ni-ZnO 中的 Ir 含量可提高 Ni3+ 含量,从而改善 OER 性能。优化后的 Ir/Ni-ZnO 表现出优异的 OER 催化性能,在 100 mA cm-2 时过电位为 294.4 mV,Tafel 斜率为 66.89 mV dec-1。此外,我们还研究了将优化后的 Ir/Ni-ZnO@NF 用作实用阴离子交换膜水电解槽(AEMWE)阳极电极的情况。放大的 Ir/Ni-ZnO@NF 阳极电极(3 cm × 3 cm)在电流密度为 8 A cm-2 时的电池电压为 1.975 V,并在 AEMWE 系统中稳定运行了 17 小时。这些发现证实了高性能和耐用异质催化剂的开发,以及它们在通过分水制氢方面的可扩展和实际应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Boosting the Oxygen Evolution Reaction Performance of Inert ZnO by Incorporating Ni and Trace-Level Ir for Scalable and Industrial-Level Water-Splitting Catalysts

Boosting the Oxygen Evolution Reaction Performance of Inert ZnO by Incorporating Ni and Trace-Level Ir for Scalable and Industrial-Level Water-Splitting Catalysts
Developing efficient and durable electrocatalysts for hydrogen production from water splitting via the oxygen evolution reaction (OER) is a significant challenge. To address this issue, we designed a Ni and trace amount of Ir incorporated ZnO heteroelectrocatalyst on nickel foam (Ir/Ni–ZnO@NF) using a facile and scalable dip-coating method without any binder. The incorporation of Ir and Ni into the ZnO host material enables the formation of an even thin film without surface cracking, facilitates residual stress relaxation, and significantly enhances OER activity. Our systematic study revealed that increased Ir incorporation in the Ir/Ni–ZnO enhances the Ni3+ content, leading to improved OER performance. The optimized Ir/Ni–ZnO exhibited excellent OER catalytic performance with an overpotential of 294.4 mV at 100 mA cm–2 and a Tafel slope of 66.89 mV dec–1. Additionally, we investigated the optimized Ir/Ni–ZnO@NF as the anode electrode of a practical anion exchange membrane water electrolyzer (AEMWE). The enlarged Ir/Ni–ZnO@NF anode electrode (3 cm × 3 cm) exhibited a cell voltage of 1.975 V at a current density of 8 A cm–2 and stable operation over 17 h in the AEMWE system. These findings confirm the development of high-performing and durable heterocatalysts, and their promising scalable and practical application for hydrogen production by water-splitting.
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来源期刊
ACS Sustainable Chemistry & Engineering
ACS Sustainable Chemistry & Engineering CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
13.80
自引率
4.80%
发文量
1470
审稿时长
1.7 months
期刊介绍: ACS Sustainable Chemistry & Engineering is a prestigious weekly peer-reviewed scientific journal published by the American Chemical Society. Dedicated to advancing the principles of green chemistry and green engineering, it covers a wide array of research topics including green chemistry, green engineering, biomass, alternative energy, and life cycle assessment. The journal welcomes submissions in various formats, including Letters, Articles, Features, and Perspectives (Reviews), that address the challenges of sustainability in the chemical enterprise and contribute to the advancement of sustainable practices. Join us in shaping the future of sustainable chemistry and engineering.
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