DataVXAdvanced Functional MaterialsPaper
journal article·2026-02

Epitaxially Grown Bimetallic Phosphide With High Activity and Durability for Bifunctional Alkaline Anion Exchange Membrane Water Electrolysis

Won Tae Hong, Duong Nguyen Nguyen, Jin‐soo Kim, Yoonhoo Ha, Jai Hyun Koh, Xu Yu, Tae‐Hoon Kim, Kyoungsuk Jin, Uk Sim, Woo‐Seok Choe, Hyeyoung Shin, Jun Young Lee, Jung Kyu Kim

Advanced Functional Materials· Volume 36· Issue 16
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Source abstract

Abstract

Abstract Bimetallic phosphides stand promising candidates as bifunctional electrocatalysts for replacing precious noble metals on both cathode and anode in anion exchange membrane water electrolysis (AEMWE), however, the intrinsic electrochemical properties constrain their practical application. Herein, a novel hybridization approach is proposed for the facet‐confined epitaxial growth of NiCoP derived on atomic defect‐engineered Ti 3 C 2 T x MXene (NiCoP@Ti 3 C 2 T x ). The efficient charge transfer across the heterointerface affects to optimizes the chemical state of the hybrid, simultaneously promoting both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) kinetics. Theoretical calculations reveal that such heterostructural engineering optimizes the adsorption energy of H/O‐containing intermediates for overall water splitting. The outstanding bifunctionality of NiCoP@Ti 3 C 2 T x is demonstrated by requiring low overpotentials of 54 and 247 mV to reach 10 mA cm −2 in HER and OER, respectively, and only 1.67 V to reach 100 mA cm −2 in overall water splitting. The AEMWE cell with symmetric NiCoP@Ti 3 C 2 T x configuration exhibits excellent performance of 1.96 V at 1 A cm −2 with outstanding durability over 500 h at 0.5 A cm −2 at 60 °C, surpassing the commercial Pt/C||RuO 2 . Overall, this work shows the great potential of epitaxial growth of transition metal phosphides on defect‐engineered 2D substrates to replace noble metal‐based catalysts for practical AEMWE.
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Research context

Energy storageCatalysis & surfaces

OpenAlex topics: MXene and MAX Phase Materials · Fuel Cells and Related Materials · Electrocatalysts for Energy Conversion

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

Affiliations

School of Chemical Engineering Sungkyunkwan University (SKKU) 2066 Seobu‐ro, Jangan‐gu Suwon 16419 Republic of Korea

Department of Chemistry Korea University Seoul 02841 Republic of Korea

Graduate School of Energy Science and Technology (GEST) Chungnam National University Daejeon 34134 Republic of Korea

Device Research Center Samsung Advanced Institute of Technology (SAIT) Suwon 16678 Republic of Korea

Clean Energy Research Center Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea

Division of Energy & Environment Technology KIST School University of Science and Technology Seoul 02792 Republic of Korea

School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 P. R. China

Department of Materials Science and Engineering Engineering Research Center Chonnam National University (CNU) Gwangju 61186 Republic of Korea

Hydrogen Energy Technology Laboratory Korea Institute of Energy Technology (KENTECH) Naju 58330 Republic of Korea

Research Institute NEEL Sciences, INC. Gwangju 61186 Republic of Korea

SKKU Advanced Institute of Nano Technology (SAINT) Sungkyunkwan University 2066 Seobu‐ro, Jangan‐gu Suwon 16419 Republic of Korea

Funding

Ministry of Science and ICT, South Korea

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