Suppression of passivation on NiMoO4 microrod by ultrathin metal-organic-framework nanosheets in urea-assisted natural seawater splitting.
| Title: | Suppression of passivation on NiMoO4 microrod by ultrathin metal-organic-framework nanosheets in urea-assisted natural seawater splitting. |
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| Authors: | Tran TTN; Center for Innovative Materials and Architectures, Ho Chi Minh City 700000, Viet Nam; Vietnam National University, Ho Chi Minh City 700000, Viet Nam.; Yu J; Key Laboratory of Rare Earths, Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341119, China.; Hai ND; Center for Innovative Materials and Architectures, Ho Chi Minh City 700000, Viet Nam; Vietnam National University, Ho Chi Minh City 700000, Viet Nam.; Peng L; Key Laboratory of Rare Earths, Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341119, China.; Le TA; Faculty of Chemical Engineering, School of Chemistry and Life Sciences, Hanoi University of Science and Technology, Hanoi 100000, Viet Nam.; Tran PDN; Center for Innovative Materials and Architectures, Ho Chi Minh City 700000, Viet Nam; Vietnam National University, Ho Chi Minh City 700000, Viet Nam.; Trinh KTL; Center for Innovative Materials and Architectures, Ho Chi Minh City 700000, Viet Nam; Vietnam National University, Ho Chi Minh City 700000, Viet Nam.; Trần-Phú T; Department of Chemistry and Biotechnology, Swinburne University of Technology, Hawthorn, Victoria 3166, Australia.; Tran NQ; Center for Innovative Materials and Architectures, Ho Chi Minh City 700000, Viet Nam; Vietnam National University, Ho Chi Minh City 700000, Viet Nam. Electronic address: tnquang@inomar.edu.vn. |
| Source: | Journal of colloid and interface science [J Colloid Interface Sci] 2026 Jan 15; Vol. 702 (Pt 2), pp. 138946. Date of Electronic Publication: 2025 Sep 05. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Academic Press Country of Publication: United States NLM ID: 0043125 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-7103 (Electronic) Linking ISSN: 00219797 NLM ISO Abbreviation: J Colloid Interface Sci Subsets: MEDLINE; PubMed not MEDLINE |
| Imprint Name(s): | Publication: Orlando, FL : Academic Press; Original Publication: New York. |
| Abstract: | Organic nucleophile-assisted natural seawater electrolysis has emerged as a promising strategy for green hydrogen production by significantly reducing energy consumption. Among Ni-based electrocatalysts, NiMoO4 has drawn attention for its activity in both oxygen evolution reaction (OER) and urea oxidation reaction (UOR). However, its practical application is hindered by severe surface passivation, particularly at industrial current densities (e.g., > 300 mA cm-2). This study shows that integration of Ru-doped Ni-MOF nanosheets onto NiMoO4 microrods to construct three-dimensional (3D) core-shell arrays enhances catalytic activity while suppressing NiMoO4 passivation during urea-assisted natural seawater splitting. Ru doping induces charge redistribution on the surface of the outer Ni-MOF layer, a process crucial for enhancing catalytic performance in natural seawater-based electrolytes. This modulation yields a low overpotential of 120 mV and 238 mV at 10 mA cm-2 for UOR and OER, respectively, with a stable operation for 200 h at 135 mA cm-2. State-of-the-art operando characterizations reveal that surface reconstruction of the NiMoO4 core plays a crucial role in improving UOR activity, while no significant oxidation-induced reconstruction occurs on the outer RuNi-MOF layer. Owing to its outstanding bifunctional performance, the RuNi-MOF@NMO-based urea-assisted natural seawater electrolyzer requires only 1.87 V to operate at 0.5 A cm-2.; (Copyright © 2025 Elsevier Inc. All rights reserved.) |
| Competing Interests: | Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. |
| Contributed Indexing: | Keywords: Core-shell; MOF; Natural seawater; Passivation; Urea electrolysis |
| Entry Date(s): | Date Created: 20250909 Latest Revision: 20251018 |
| Update Code: | 20260130 |
| DOI: | 10.1016/j.jcis.2025.138946 |
| PMID: | 40925253 |
| Database: | MEDLINE |
Journal Article