Journal article
Ion-Exchange-Induced Selective Etching for the Synthesis of Amino-Functionalized Hollow Mesoporous Silica for Elevated-High-Temperature Fuel Cells
ACS Applied Materials and Interfaces, Vol.9(37), pp.31922-31930
2017
Abstract
As differentiated from conventional synthetic processes, amino-functionalized hollow mesoporous silica (NH2-HMS) has been synthesized using a new and facile strategy of ion-exchange-induced selective etching of amino-functionalized mesoporous silica (NH2-meso-silica) by an alkaline solution. Nuclear magnetic resonance (NMR) spectroscopy and in situ time-resolved small-angle X-ray scattering (SAXS) reveal that ion-exchange-induced selective etching arises from the gradient distribution of OH- in the NH2-meso-silica nanospheres. Moreover, the ion-exchange-induced selective etching mechanism is verified through a successful synthesis of hollow mesoporous silica. After infiltration with phosphotungstic acid (PWA), PWA-NH2-HMS nanoparticles are dispersed in the poly(ether sulfone)-polyvinylpyrrolidone (PES-PVP) matrix, forming a hybrid PWA-NH2-HMS/PES-PVP nanocomposite membrane. The resultant nanocomposite membrane with an optimum loading of 10 wt % of PWA-NH2-HMS showed an enhanced proton conductivity of 0.175 S cm-1 and peak power density of 420 mW cm-2 at 180 °C under anhydrous conditions. Excellent durability of the hybrid composite membrane fuel cell has been demonstrated at 200 °C. The results of this study demonstrated the potential of the facile synthetic strategy in the fabrication of NH2-HMS with controlled mesoporous structure for application in nanocomposite membranes as a technology platform for elevated-temperature proton exchange membrane fuel cells.
Details
- Title
- Ion-Exchange-Induced Selective Etching for the Synthesis of Amino-Functionalized Hollow Mesoporous Silica for Elevated-High-Temperature Fuel Cells
- Authors
- Jin Zhang (Author) - Beihang University, ChinaJian Liu (Author) - Curtin UniversityShanfu Lu (Author) - Beihang University, ChinaHaijin Zhu (Author) - Deakin UniversityDavid Aili (Author) - Technical University of Denmark, DenmarkRoland De Marco (Author) - University of the Sunshine CoastYan Xiang (Author) - Beihang University, ChinaMaria Forsyth (Author) - Deakin UniversityQingfeng Li (Author) - Technical University of Denmark, DenmarkSan Ping Jiang (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
- Publication details
- ACS Applied Materials and Interfaces, Vol.9(37), pp.31922-31930
- Publisher
- American Chemical Society
- DOI
- 10.1021/acsami.7b09591
- ISSN
- 1944-8244
- Organisation Unit
- University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
- Language
- English
- Record Identifier
- 99450695302621
- Output Type
- Journal article
Metrics
3 File views/ downloads
491 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites