A Porous Perovskite Nanofiber with Reinforced Aerophobicity for High-Performance Anion Exchange Membrane Water Splitting

Li，Lu1,2; Zheng，Zhilin1; Li，Jiaxing1; Mu，Yongbiao1,3; Wang，Yameng1,3; Huang，Zebing1,3; Xiao，Yiping2; Huang，Haitao2; Wang，Shuai1; Chen，Gao2; Zeng，Lin1,3

2023

10.1002/smll.202301261

Small   影响因子和分区

1613-6810

1613-6829

Perovskite oxides stand out as emerging oxygen evolution reaction (OER) catalysts on account of their effective electrocatalytic performance and low costs. Nevertheless, perovskite oxides suffer from severe bubble overpotential and inhibited electrochemical performance in large current densities due to their small specific surface areas and structural compactness. Herein, the study highlights the electrospun nickel-substituted LaSrFeO (LSF) porous perovskite nanofibers, that is, LaSrFeNiO (denoted as ES-LSFN-x, x = 0, 0.1, 0.3, and 0.5), as high-performance OER electrocatalysts. The most effective LaSrFeNiO (ES-LSFN-0.5) nanofibers suggest a larger specific surface area, higher porosity, and faster mass transfer than the counterpart sample prepared by conventional sol–gel method (SG-LSFN-0.5), showing notably increased geometric and intrinsic activities. The bubble visualization results demonstrate that the enriched and nano-sized porosity of ES-LSFN-0.5 enables reinforced aerophobicity and rapid detachment of oxygen bubbles, thereby reducing the bubble overpotential and enhancing the electrochemical performance. As a result, the ES-LSFN-0.5-based anion exchange membrane water electrolysis delivers a superior stability of 100 h while the SG-LSFN-0.5 counterpart degrades rapidly within 20 h under a current density of 100 mA cm. The results highlight the advantage of porous electrocatalysts in optimizing the performance of large current density water electrolysis devices by reducing the bubble overpotential.

anion exchange membrane water electrolysis electrospinning oxygen evolution reaction perovskite oxide porous nanofibers

SCI ; EI

英语

第一 ; 通讯

Guangdong Basic and Applied Basic Research Foundation[2022B1515120004] ; Shenzhen Fundamental Research Programs[JCYJ20200109141216566] ; Research Grants Council of the Hong Kong Special Administrative Region, China[PDFS2223-5S03]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000992115000001

WILEY-V C H VERLAG GMBH

20232114137380

Current density ; Electrocatalysts ; Electrolysis ; Ions ; Iron compounds ; Lanthanum compounds ; Mass transfer ; Nickel compounds ; Perovskite ; Porosity ; Reinforcement ; Sols ; Strontium compounds

Minerals:482.2 ; Mass Transfer:641.3 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Solid State Physics:933 ; Materials Science:951

2-s2.0-85159922275

Scopus

1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Applied Physics,The Hong Kong Polytechnic University,Hung Hom, Kowloon,999077,Hong Kong
3.SUSTech Energy Institute for Carbon Neutrality,Southern University of Science and Technology,Shenzhen,518055,China

Li，Lu,Zheng，Zhilin,Li，Jiaxing,et al. A Porous Perovskite Nanofiber with Reinforced Aerophobicity for High-Performance Anion Exchange Membrane Water Splitting[J]. Small,2023,19(38).

Li，Lu.,Zheng，Zhilin.,Li，Jiaxing.,Mu，Yongbiao.,Wang，Yameng.,...&Zeng，Lin.(2023).A Porous Perovskite Nanofiber with Reinforced Aerophobicity for High-Performance Anion Exchange Membrane Water Splitting.Small,19(38).

Li，Lu,et al."A Porous Perovskite Nanofiber with Reinforced Aerophobicity for High-Performance Anion Exchange Membrane Water Splitting".Small 19.38(2023).