Enhancement of Hydrogen Adsorption on Spray-Synthesized HKUST-1 Via Lithium Doping and Defect Creation

Overview

Journal Materials (Basel)

Publisher MDPI

Date 2023 Aug 12

PMID 37570125

Authors

Masaru Kubo

Tomoki Matsumoto

Manabu Shimada

Affiliations

Soon will be listed here.

Abstract

We prepared HKUST-1 (CuBTC; BTC = 1,3,5-benzenetricarboxylate) using a spray synthesis method with Li doping and defect created via partial replacement of HBTC with isophthalic acid (IP) to enhance the H adsorption capacity. Li-doping was performed by incorporating LiNO in HKUST-1 via spray synthesis and subsequent thermal treatment for decomposing NO, which enhances H uptake at 77 K and 1 bar per unit mass and per unit area from 2.37 wt% and 4.16 molecules/nm for undoped HKUST-1 to 2.47 wt% and 4.33 molecules/nm, respectively. Defect creation via the replacement of the BTC linker with the IP linker slightly in HKUST-1 skeleton did not affect H uptake. Both Li-doping and defect creation significantly enhanced H uptake to 3.03 wt%, which was caused by the coordination of Li ions with free carboxylic groups of the created defects via IP replacement.

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