Ultrahigh Pressure-induced Modification of Morphology and Performance of MOF-derived Cu@C Electrocatalysts

Overview

Journal Nanoscale Adv

Publisher Royal Society of Chemistry

Specialty Biotechnology

Date 2023 Feb 9

PMID 36756266

Authors

Ichiro Yamane

Kota Sato

Teruki Ando

Taijiro Tadokoro

Seiya Yokokura

Taro Nagahama

Yoshiki Kato

Tatsuya Takeguchi

Toshihiro Shimada

Affiliations

Soon will be listed here.

Abstract

We report the pyrolysis of copper-containing metal-organic frameworks under high pressure and the effect of the applied pressure on the morphology and electrocatalytic performance toward the oxygen-related reactions of the products. The high-pressure and high-temperature (HPHT) syntheses were performed under 5, 2.5, 1, and 0.5 GPa, and the Cu@C products were obtained except for the 2.5 GPa experiment. Copper formed a shell-like nanostructure on the carbon matrices during the 0.5 GPa experiment, whereas copper formed sub-nanometer sized particles in the carbon matrices with the increasing pressure. It is considered that the transportation of copper atoms by outgassing during the pyrolysis affects the morphology. Electrochemical measurements revealed that all samples exhibited activity for the oxygen reduction reaction (ORR). The 0.5 GPa-treated product also exhibited the oxygen evolution reaction (OER). The overall ORR/OER performance of this product was excellent among Cu-based bifunctional materials even though it did not contain cocatalysts such as nitrogen-doped carbon or other metal elements. The Cu(iii) species in the nano-thick copper shell structure provided the active sites for the OER.

Citing Articles

Synthesis of Electrocatalytic Tungsten Carbide Nanoparticles by High-Pressure and High-Temperature Treatment of Organotungsten Compounds.

Tadokoro T, Sato S, Yamane I, Waizumi H, Yokokura S, Shimada T Nanomaterials (Basel). 2025; 15(3).

PMID: 39940146 PMC: 11820106. DOI: 10.3390/nano15030170.

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