Electrochemically Activatable Liquid Organic Hydrogen Carriers and Their Applications

Juhyun Cho, Byeongyoon Kim, Sandhya Venkateshalu, Dong Young Chung, Kwangyeol Lee, Sang Il Choi

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Hydrogen has been chosen as an environmentally benign energy source to replace fossil-fuel-based energy systems. Since hydrogen is difficult to store and transport in its gaseous phase, thermochemical liquid organic hydrogen carriers (LOHCs) have been developed as one of the alternative technologies. However, the high temperature and pressure requirements of thermochemical LOHC systems result in huge energy waste and impracticality. This Perspective proposes electrochemical (EC)-LOHCs capable of more efficient, safer, and lower temperature and pressure hydrogen storage/utilization. To enable this technology, several EC-LOHC candidates such as isopropanol, phenolic compounds, and organic acids are described, and the latest research trends and design concepts of related homo/hetero-based electrocatalysts are discussed. In addition, we propose efficient fuel-cell-based systems that implement electrochemical (de)hydrogenation of EC-LOHCs and present prospects for relevant technologies.

Original languageEnglish
Pages (from-to)16951-16965
Number of pages15
JournalJournal of the American Chemical Society
Volume145
Issue number31
DOIs
StatePublished - 9 Aug 2023

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