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Designing Ce-O-Ti Interface Bridge in CeOx/N-Ti3C2Ty Heterojunction for Electrochemical Hydrogen Evolution Reaction
Hau Quoc Pham1,2,3, Quyen Huynh3, Tai Thien Huynh3
1Future Materials & Devices Lab., Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 70000, Viet Nam.
Abstract:
We herein construct the Ce-O-Ti interface bridge in the CeOx/N-Ti3C2Ty heterojunction through an ultrasonic-assisted hydrothermal route as an efficient Pt-free hydrogen evolution electrocatalyst. The synergistic contribution of the heterogeneous Ce-O-Ti bridge and oxygen vacancies boosts the water dissociation and thus drastically reduces energy barriers of the hydrogen evolution reaction (HER). The optimal CeOx/N-Ti3C2Ty material requires only a small overpotential (51.12 mVRHE at 10 mA cm-2) and has a low Tafel slope (51.87 mV dec-1) and long-term stability with negligible changes in structural and morphological properties after at least 50 h of testing.
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