基于sno2的水解离催化在双极膜水电解槽中的进展

IF 18.2 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2025-03-12 DOI:10.1021/acsenergylett.5c00309

Sanghwi Han, Sayantan Sasmal, Meikun Shen, Yifan Wu, Olivia T. Vulpin, Shujin Hou, Sungjun Kim, Jang Yong Lee, Jeyong Yoon, Shannon W. Boettcher

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引用次数: 0

摘要

推进水解离（WD）催化对双极膜（BPM）技术在能量转换系统中的应用具有重要意义。我们报告了直接在阳离子导电膜上一步合成sno2基WD催化剂的策略，该策略简单，快速，可扩展，同时具有创纪录的高WD性能。电化学和材料分析表明，SnO2层的厚度和非均质性是控制SnO2 WD催化剂层中离子传输和影响WD性能的主要因素。在最佳沉积条件下，sno2催化的BPM电解槽在1 a cm-2时的总电压为1.93 V，过电位（ηwd）为41±7 mV。在制造100 cm2 BPM时，这些性能指标在不同的1.5 cm × 1.5 cm截面上保持不变。该BPM电解槽在膜电极组装结构中以纯水进料运行，在1.0 a cm-2下，在100小时内降解率为0.5 mV h - 1， ηwd增加0.27 mV h - 1，经久耐用。

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Advancing SnO2-Based Water Dissociation Catalysis in Bipolar-Membrane Water Electrolyzers

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Advancing SnO2-Based Water Dissociation Catalysis in Bipolar-Membrane Water Electrolyzers

Advancing water dissociation (WD) catalysis is important for bipolar membrane (BPM) technology for energy-conversion systems. We report a one-step strategy for synthesizing SnO₂-based WD catalysts directly on a cation-conducting membrane, which is straightforward, fast, and scalable, while exhibiting record-high WD performance. Electrochemical and material analyses show that the thickness and heterogeneity of the SnO₂ layer are the primary factors governing ionic transport in the SnO₂ WD catalyst layer and influencing WD performance. At optimal deposition conditions, the SnO₂-catalyzed BPM electrolyzer has a low total cell voltage at 1 A cm^–2 of 1.93 V and a WD overpotential (η_wd) of 41 ± 7 mV. These performance metrics were maintained across various 1.5 cm × 1.5 cm sections upon the fabrication of a 100 cm² BPM. This BPM electrolyzer, operating with pure-water feed in a membrane-electrode-assembly architecture, was durable, with a degradation rate of 0.5 mV h^–1 over 100 h at 1.0 A cm^–2 and the η_wd increase of 0.27 mV h^–1.

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.