Engineering interfacial water networks via oxygenophilic Ru sites on NiCo alloy for efficient anion exchange membrane water electrolysis
Source abstract
Abstract
: Regulating interfacial water structure and disrupting its original hydrogen bond network is crucial for achieving efficient hydrogen evolution reaction (HER) under industrial current densities. Herein, we report a catalyst fabricated by anchoring oxygenophilic Ru nanoparticles onto a magnetron-sputtered NiCo alloy (Ru/NiCo, Ru loading of only 2.35 wt%). This paper reveals that the combined effect of Ru and NiCo enhances OH* adsorption and promotes the transformation from tetrahedral coordinated hydrogen bond water to mobile Free-H 2 O, accelerates the dynamic rearrangement of interface water, reduces intramolecular hydrogen bonds. The Ru/NiCo requires 15 mV and 234 mV to reach –10 and –1000 mA cm −2 , respectively. In a practical anion exchange membrane water electrolyzer (AEMWE), the NiFeO x ||Ru/NiCo can operate stably at 1 A cm −2 for 1000 h (degradation rate of 9.96 μV h −1 ). This work provides fundamental insight into designing efficient catalysts for industrial hydrogen production by engineering the interfacial aqueous environment through the interaction of oxygenophilic site with the alloy.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Ammonia Synthesis and Nitrogen Reduction · Membrane-based Ion Separation Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (47)
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1. Single‐atom mo with high oxophilicity anchored ru clusters for practical anion‐exchange‐membrane water electrolyzer
2. Collapsing the bottleneck by interfacial effect of Ni/CeO2 for long‐term hydrogen production using waste alkaline water in practical‐scale anion exchange membrane water electrolyzer10.1002/advs.71521 ↗
3. Mirror‐symmetric nanoarray networks of atomic ni‐incorporated tungsten oxynitride for efficient and robust alkaline hydrogen evolution10.1002/anie.202518043 ↗
4. Macromolecular crosslinked poly(aryl piperidinium)-based anion exchange membranes with enhanced ion conduction for water electrolysis10.1016/j.memsci.2024.122717 ↗
5. Diversity of platinum-sites at platinum/fullerene interface accelerates alkaline hydrogen evolution10.1038/s41467-023-37404-0 ↗
6. Scalable production of high-performance electrocatalysts for electrochemical water splitting at large current densities10.1016/j.esci.2024.100334 ↗
7. Pinpointing the axial ligand effect on platinum single-atom-catalyst towards efficient alkaline hydrogen evolution reaction10.1038/s41467-022-34619-5 ↗
8. Amorphous phosphates tailor local proton supply for alkaline hydrogen evolution electrocatalysis10.1002/adma.202503660 ↗
9. High‐entropy topologically close‐packed ir alloys enable interatomic hydrogen spillover for hydrogen evolution toward high‐performing anion exchange membrane water electrolyzers
10. Constructing ultra‐stable electrocatalysts to achieve adaptability of industrial‐level alkaline water electrolyzers for fluctuating renewable energies10.1002/aenm.202500926 ↗
11. Hydroxyl‐binding induced hydrogen bond network connectivity on ru‐based catalysts for efficient alkaline hydrogen oxidation electrocatalysis
12. Dynamic construction of a durable epitaxial catalytic layer for industrial alkaline water splitting10.1038/s41467-025-63361-x ↗
13. Rational design of dynamic interface water evolution on turing electrocatalyst toward the industrial hydrogen production
14. Carbon-confinement modulated interfacial water structure for accelerated dissociation kinetics towards hydrogen evolution10.1016/j.cej.2025.166181 ↗
15. Self-assembly-assisted dynamic placement of noble metals selectively on multifunctional carbide supports for alkaline hydrogen electrocatalysis10.1039/D4EE04660A ↗
16. Manipulating interfacial water via metallic pt1co6 sites on self‐adaptive metal phosphides to enhance water electrolysis
17. Engineering the interfacial water hydrogen-bond network for enhanced alkaline hydrogen evolution10.1016/j.jcis.2025.139307 ↗
18. Synergistic ru-ni-cu interface for stable hydrogen evolution on 1% Ru-Ni@Cu alloy grown directly on carbon paper electrode10.1016/j.jallcom.2022.165315 ↗
19. Carbon supported nico alloy catalyst with face-to-face encapsulated structure for electrocatalytic hydrogen evolution10.1016/j.ijhydene.2025.04.296 ↗
20. Three-dimensional multi-channel structure nico alloy used for boosting efficient overall water splitting10.1016/j.fuel.2024.131119 ↗
21. Structural and compositional optimization of bimetallic nico alloy nanoparticles for promotion of alkaline hydrogen evolution reaction10.1016/j.jpowsour.2024.235641 ↗
22. How the arrangement of platinum atoms on ruthenium nanoparticles improves hydrogen evolution activity
23. Anomalous PH‐dependence of ru for hydrogen electrochemistry10.1002/anie.202508239 ↗
24. Decoupling the hor enhancement on PtRu: Dynamically matching interfacial water to reaction coordinates10.1016/S1872-2067(25)64785-1 ↗
25. Low resistivity Ru1-xTixO2 thin films deposited by hybrid high-power impulse magnetron sputtering and direct current magnetron sputtering technique10.1016/j.tsf.2019.03.005 ↗
26. Huge giant-magnetoresistance of Co/Ru/l11-copt multi-layer pseudo-spin valve10.1016/j.jallcom.2022.168441 ↗
27. Atomic ruthenium modification of nickel-cobalt alloy for enhanced alkaline hydrogen evolution10.1016/j.apcatb.2023.122710 ↗
28. Stable hydrogen evolution reaction at high current densities via designing the Ni single atoms and Ru nanoparticles linked by carbon bridges10.1038/s41467-024-46553-9 ↗
29. Substantial impact of built‐in electric field and electrode potential on the alkaline hydrogen evolution reaction of Ru−CoP urchin arrays
30. Metastabilizing the ruthenium clusters by interfacial oxygen vacancies for boosted water splitting electrocatalysis
31. Each performs its own functions: Nickel oxide supported ruthenium single-atoms and nanoclusters relay catalysis with multi-active sites for efficient alkaline hydrogen evolution reaction10.1016/j.apcatb.2022.122316 ↗
32. Unveiling the nature of Pt-induced anti-deactivation of Ru for alkaline hydrogen oxidation reaction10.1038/s41467-024-45873-0 ↗
33. Bulk and surface dual modification of nickel-cobalt spinel with ruthenium toward highly efficient overall water splitting10.1016/j.apcatb.2022.121081 ↗
34. Quenching-induced atom-stepped bimetallic sulfide heterointerface catalysts for industrial hydrogen generation10.1016/j.esci.2024.100311 ↗
35. Adjustable heterointerface-vacancy enhancement effect in RuO2@Co3O4 electrocatalysts for efficient overall water splitting10.1016/j.apcatb.2022.122294 ↗
36. Manipulating the microenvironment of single atoms by switching support crystallinity for industrial hydrogen evolution
37. Porous cobalt sulfide nanosheets arrays with low valence copper incorporated for boosting alkaline hydrogen evolution via lattice engineering10.1016/j.cej.2022.138628 ↗
38. Engineering active and robust alloy-based electrocatalyst by rapid joule-heating toward ampere-level hydrogen evolution10.1038/s41467-024-51976-5 ↗
39. Cooperative alkaline hydrogen evolution via inducing local electric field and electron localization10.1016/S1872-2067(23)64532-2 ↗
40. Rationalizing the superior catalytic efficiency of nickel nitride vs nickel sulfide for alkaline hydrogen evolution reaction from bubble dynamics study and density functional theory (DFT) calculations10.1021/acscatal.4c05777 ↗
41. Bimetallic nanoalloys planted on super-hydrophilic carbon nanocages featuring tip-intensified hydrogen evolution electrocatalysis10.1038/s41467-024-51370-1 ↗
42. Theory-guided design of electron-deficient ruthenium cluster for ampere-level current density electrochemical hydrogen evolution10.1016/j.nanoen.2023.108694 ↗
43. Scalable ruthenium core–shell hydrogen catalyst for efficient and robust proton-exchange membrane electrolyser10.1038/s41563-025-02405-5 ↗
44. Hydroxyl–interfacial water proton exchange strategy to hasten water reduction on ruthenium sites10.1021/acscatal.4c07602 ↗
45. Cathode passivation suppression enables ultrastable industry-leading alkaline water electrolysis at hundred-ampere currents10.1039/D5EE04506A ↗
46. Revealing the role of interfacial water and key intermediates at ruthenium surfaces in the alkaline hydrogen evolution reaction10.1038/s41467-023-41030-1 ↗
47. Upscaled production of an ultramicroporous anion-exchange membrane enables long-term operation in electrochemical energy devices10.1038/s41467-023-38350-7 ↗