Evaluation of IrO2 catalysts doped with Ti and Nb at industrially relevant electrolyzer conditions: A comprehensive study

IF 13.2 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-01-06 DOI:10.1016/j.cej.2025.159317

Xiang Lyu, Hung-Ming Chang, Haoran Yu, Nancy N. Kariuki, Jae Hyung Park, Deborah J. Myers, Jun Yang, Iryna V. Zenyuk, Alexey Serov

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引用次数: 0

Abstract

A series of commercial Oxygen Evolution Reaction (OER) IrO₂-based materials doped with acid-stable titanium and niobium species were comprehensively characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) with energy dispersive spectroscopy (EDS), and X-ray Scattering. Electrocatalysts were integrated into Membrane Electrode Assembly (MEA) using a fabrication method developed under the US DOE H2NEW consortium. An electrolysis performance in a commercial setup as well as a laboratory screening system was performed at conditions relevant to industrial application. According to the comprehensive characterizations, the studied materials are closer to doped iridium oxides rather than core–shell structures. In an electrolysis cell, the IrO₂/TiO_x catalyst slightly outperforms the IrO₂/NbO_x based on the activity. It was demonstrated that the operation of electrolysis cells at elevated temperatures and the implementation of thinner Nafion-type membranes allows for substantially increased performance, which is consistent with the literature report. This work provides valuable baselines including characterization and performance for guiding future research in this direction.

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工业相关电解槽条件下掺钛和铌的IrO2催化剂的评价：一项综合研究

通过布鲁瑙尔-艾美特-泰勒（BET）、X 射线衍射分析（XRD）、X 射线光电子能谱（XPS）、透射电子显微镜（TEM）与能量色散光谱（EDS）以及 X 射线散射，对掺杂了酸稳定性钛和铌物种的一系列商用氧进化反应（OER）IrO2 基材料进行了全面表征。采用美国能源部 H2NEW 联合企业开发的制造方法，将电催化剂集成到膜电极组件 (MEA) 中。在与工业应用相关的条件下，在商业装置和实验室筛选系统中进行了电解性能测试。根据综合表征，所研究的材料更接近于掺杂铱氧化物，而不是核壳结构。在电解池中，IrO2/TiOx 催化剂的活性略优于 IrO2/NbOx。研究表明，电解池在高温下运行以及采用更薄的 Nafion 型膜可以大幅提高性能，这与文献报道一致。这项工作提供了宝贵的基线，包括特征描述和性能，为今后在此方向的研究提供了指导。

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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.