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

Li Liu ¹Ting Huang ²Xiaoliang Yang ¹Shoujie Liu ³Shunsheng Wang ¹Linlin Xiang ¹Gongming Wang ²Long Kuai⁴

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作者信息

1. 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
2. Department of Chemistry,University of Science and Technology of China,Hefei 230026,China
3. School of Materials Science and Engineering,Anhui University,Hefei 230601,China
4. 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;Institute of Energy,Hefei Comprehensive National Science Center,Hefei 230031,China
折叠

Abstract

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.

Key words

Microdrop-confined synthesis/Porous hollow microspheres/PEM electrolyzer/Water splitting/Mass transfer

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基金项目

National Natural Science Foundation of China(22375004)

National Natural Science Foundation of China(22175163)

National Natural Science Foundation of China(21801003)

Anhui Provincial Education Department(2023AH020014)

Anhui Provincial Education Department(2023AH010030)

Anhui Provincial Education Department(gxgnfx2021132)

University Synergy Innovation Program of Anhui Province(GXXT-2022-007)

Science and Technology Program of Wuhu(2022yf60)

Natural Science Foundation of Anhui Province(2208085UD04)

Plan for Anhui Major Provincial Science & Technology Project(2021d05050006)

Plan for Anhui Major Provincial Science & Technology Project(202103a05020015)

Anhui Development and Reform Commission(AHZDCYCX-LSDT2023-07)

Anhui Development and Reform Commission(AHZDCYCX-LSDT2023-08)

Anhui Polytechnic UniversityYouth Talent Training Program(2021)()

Contango New Energy Technology Co.,Ltd.for the PEM electrolysis tests()

出版年

2024

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

参考文献量37

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