首页|Microdrop-confined synthesis and regulation of porous hollow Ir-based catalysts for the mass transfer-enhanced electrolysis of pure water

Microdrop-confined synthesis and regulation of porous hollow Ir-based catalysts for the mass transfer-enhanced electrolysis of pure water

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Maximally exploiting the active sites of iridium catalysts is essential for building low-cost proton exchange membrane(PEM)electrolyzers for green H2 production.Herein,we report a novel microdrop-confined fusion/blasting(MCFB)strategy for fabricating porous hollow IrO1-xmicrospheres(IrO1-x-PHM)by introducing explosive gas mediators from a NaNO3/glucose mixture.Moreover,the developed MCFB strategy is demonstrated to be general for synthesizing a series of Ir-based composites,including Ir-Cu,Ir-Ru,Ir-Pt,Ir-Rh,Ir-Pd,and Ir-Cu-Pd and other noble metals such as Rh,Ru,and Pt.The hollow structures can be regulated using different organics with NaNO3.The assembled PEM electrolyzer with IrO1-x-PHM as the anode catalyst(0.5 mg/cm2)displays an impressive polarization voltage of 1.593 and 1.726 V at current densities of 1 and 2 A/cm2,respectively,outperforming commercial IrOx catalysts and most of the ever-reported iridium catalysts with such low catalyst loading.More importantly,the breakdown of the polarization loss indicates that the improved performance is due to the facilitated mass transport induced by the hollowness.This study offers a versatile platform for fabricating efficient Ir-based catalysts for PEM electrolyzers and beyond.

Microdrop-confined synthesisPorous hollow microspheresPEM electrolyzerWater splittingMass transfer

Li Liu、Ting Huang、Xiaoliang Yang、Shoujie Liu、Shunsheng Wang、Linlin Xiang、Gongming Wang、Long Kuai

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School of Chemical and Environmental Engineering,Anhui Laboratory of Clean Catalytic Engineering,Key Laboratory of Production and Conversion of Green Hydrogen,Anhui Polytechnic University,Wuhu 241000,China

Department of Chemistry,University of Science and Technology of China,Hefei 230026,China

School of Materials Science and Engineering,Anhui University,Hefei 230601,China

Institute of Energy,Hefei Comprehensive National Science Center,Hefei 230031,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaAnhui Provincial Education DepartmentAnhui Provincial Education DepartmentAnhui Provincial Education DepartmentUniversity Synergy Innovation Program of Anhui ProvinceScience and Technology Program of WuhuNatural Science Foundation of Anhui ProvincePlan for Anhui Major Provincial Science & Technology ProjectPlan for Anhui Major Provincial Science & Technology ProjectAnhui Development and Reform CommissionAnhui Development and Reform CommissionAnhui Polytechnic UniversityYouth Talent Training Program(2021)Contango New Energy Technology Co.,Ltd.for the PEM electrolysis tests

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2024

10.1016/j.scib.2024.02.002

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(8)
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