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journal article·2025-01Open access

Synergistic Configuration of Binary Rhodium Single Atoms in Carbon Nanofibers for High‐Performance Alkaline Water Electrolyzer

Natarajan Logeshwaran, Gyuchan Kim, Pandiarajan Thangavel, Sun Seo Jeon, Kaliannan Thiyagarajan, Kampara Roopa Kishore, Hyunjoo Lee, Inseok Seo, Hongseok Yun, Sungho Lee, Byung‐Hyun Kim, Young Jun Lee

Advanced Science· Volume 12· Issue 3
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Source abstract

Abstract

Abstract Electrochemical alkaline water electrolysis offers significant economic advantages; however, these benefits are hindered by the high kinetic energy barrier of the water dissociation step and the sluggish kinetics of the hydrogen evolution reaction (HER) in alkaline media. Herein, the ensemble effect of binary types of Rh single atoms (Rh‐Nx and Rh‐Ox) on TiO2‐embedded carbon nanofiber (Rh‐TiO2/CNF) is reported, which serves as potent active sites for high‐performance HER in anion exchange membrane water electrolyzer (AEMWE). Density functional theory (DFT) analyses support the experimental observations, highlighting the critical role of binary types of Rh single atoms facilitated by the TiO2 sites. The Rh‐TiO2/CNF demonstrates an impressive areal current density of 1 A cm−2, maintaining extended durability for up to 225 h in a single‐cell setup. Furthermore, a 2‐cell AEMWE stack utilizing Rh‐TiO2/CNF is tested under industrial‐scale conditions. This research makes a significant contribution to the commercialization of next‐generation high‐performance and durable AEMWE stacks for clean hydrogen production.
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Research context

Nanomaterials

OpenAlex topics: Hybrid Renewable Energy Systems · Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Carbon Composite Materials Research Center Korea Institute of Science and Technology (KIST) 92 Chudong‐ro, Bongdong‐eup Wanju‐gun Jeonbuk 55324 Republic of Korea

Department of Applied Chemistry Center for Bionano Intelligence Education and Research Hanyang University ERICA 55 Hanyangdaehak‐ro, Sangnok‐gu Ansan‐si Gyeonggi‐do 15588 Republic of Korea

Department of Chemistry Ulsan National Institute of Science and Technology (UNIST) UNIST‐gil, Eonyang‐eup, Ulju‐gun Ulsan 44919 Republic of Korea

Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea

Department of Mechanical Engineering Ulsan National Institute of Science and Technology (UNIST) UNIST‐gil, Eonyang‐eup, Ulju‐gun Ulsan 44919 Republic of Korea

School of Advanced Materials Engineering Jeonbuk National University Baekje‐daero 567 Jeonju 54896 Republic of Korea

Department of Chemistry Hanyang University 222, Wangsimni‐ro, Seongdong‐gu Seoul Republic of Korea

Funding

National Research Foundation of Korea

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