期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 297, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120458
关键词
Unitized regenerative fuel cell; Electrodeposition; Relative humidity; Catalysts; Operation mode for unitized regenerative fuel cell
资金
- Korea Institute of Energy Technology Evaluation and Planning - Korea government MOTIE [20173010032210, 2019281010007A]
- Korea Institute of Science and Technology [2E31002]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20173010032210, 2019281010007A] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, the water flux of the anode and cathode electrodes is systematically controlled by manipulating the relative humidity of the supplied gas and altering the selection of the electrode in amphiphilic membrane electrode assembly. By investigating the operation factors of URFC, a high round trip efficiency of 51 % (@ 0.4 A cm(-2)) was achieved with only 0.65 mg((Pt+Ir)) cm(-2) of the noble catalyst.
Unitized regenerative fuel cells (URFCs) are electrochemical devices operating as both fuel cells (FCs) or water electrolysis (WE). For practical efficiency in both FC and WE operations, a substantial amount of platinum and iridium, up to 3 mg cm(-2), is often employed in URFCs. The main obstacle in catalysis of the URFC is oxygen reduction or water oxidation reactions for FC or WE operation, respectively. The electrode also requires different affinities for water, that is, hydrophobicity and hydrophilicity for gas and water transport, respectively. In this study, the water flux of the anode and cathode electrodes is systematically controlled by manipulating the relative humidity of the supplied gas and altering the selection of the electrode in amphiphilic membrane electrode assembly. By investigating the operation factors of URFC, 51 % of high round trip efficiency (@ 0.4 A cm(-2)) was achieved with only 0.65 mg((Pt+Ir)) cm(-2) of the noble catalyst.
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