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

IF 19.3 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

{"title":"Advancing SnO2-Based Water Dissociation Catalysis in Bipolar-Membrane Water Electrolyzers","authors":"Sanghwi Han, Sayantan Sasmal, Meikun Shen, Yifan Wu, Olivia T. Vulpin, Shujin Hou, Sungjun Kim, Jang Yong Lee, Jeyong Yoon, Shannon W. Boettcher","doi":"10.1021/acsenergylett.5c00309","DOIUrl":null,"url":null,"abstract":"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 (ηwd) 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 ηwd increase of 0.27 mV h–1.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"135 1","pages":""},"PeriodicalIF":19.3000,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Energy Letters ","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acsenergylett.5c00309","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

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.

Abstract Image

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

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.