Surface-tension-free fabrication to minimize defects in cobalt-silica membranes via the freeze-drying technique for H 2 separation at high temperatures

Tanzila Anjum; Hammad Saulat; Gianni Olguin; David Wang; Xiaozhen Zhang; Xiaonan Kou; Xian Yin; Asim Laeeq Khan; Guozhao Ji

doi:10.1039/d5ta07063e

November 18, 2025Journal of Materials Chemistry A

Surface-tension-free fabrication to minimize defects in cobalt-silica membranes via the freeze-drying technique for H 2 separation at high temperatures

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Key Points

To determine whether a surface-tension-free freeze-drying approach minimizes membrane defects and improves high-temperature hydrogen separation in cobalt-silica membranes.
Fabricated cobalt-silica membranes via a surface-tension-free freeze-drying technique.
Assessed defect formation, hydrogen separation performance, and selectivity at elevated temperatures in comparison with conventional evaporation drying.
Freeze-drying effectively minimized structural defects in cobalt-silica membranes relative to the evaporation-drying process.
The resulting freeze-dried membranes demonstrated superior hydrogen separation capability and higher selectivity under high-temperature operating conditions.

Implication

Comparative study demonstrates enhanced hydrogen selectivity in freeze-dried cobalt-silica membranes at high temperatures, indicating an effective defect-minimization strategy.

Abstract

Freeze-drying minimizes defects in cobalt-silica membranes, enabling superior H 2 separation with higher selectivity at high temperatures compared with the evaporation-drying-based counterpart process.

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Cite This Study

Anjum et al. (2025) studied this question.

synapsesocial.com/papers/6a9e69ffa097febeb095e830 https://doi.org/10.1039/d5ta07063e

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Surface-tension-free fabrication to minimize defects in cobalt-silica membranes via the freeze-drying technique for H 2 separation at high temperatures

Key Points

Implication

Abstract

Discussion

Cite This Study

Surface-tension-free fabrication to minimize defects in cobalt-silica membranes via the freeze-drying technique for H 2 separation at high temperatures

Key Points

Implication

Abstract

Discussion

Cite This Study

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