Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Affordable, active, and durable oxygen evolution reaction (OER) catalysts are crucial for proton exchange membrane water electrolysis (PEMWE). The low-cost RuO, relative to IrO, is attractive for acidic OER while suffering from durability. To resolve this activity-stability dilemma of RuO, we propose a universal nonmetal-metal strategy to reduce Ru-O covalency while promoting local reactive water concentration for efficient acidic OER. The nonmetal-metal dual-dopant via complementary regulation of O 2 and Ru 4 bands weakens the Ru-O covalency, constraining the lattice oxygen participation and Ru dissolution. Operando evidence further unravels that the best-performing B-Cr-RuO, via surface OH, increases the local reactive water concentration and the connectivity of H-bond networks, enabling an order of magnitude enhancement in intrinsic activity without sacrificing durability over RuO. Consequently, the B-Cr-RuO-incorporated PEMWE delivers attractive performance for practical applications, requiring a voltage of only 1.54 V@1.0 A cm and maintaining a durable operation at industrial current densities.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.nanolett.5c02815 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Nonmetal-Metal Strategy to Reduce Ru-O Covalency while Promoting Local Reactive Water Concentration for Efficient Acidic Oxygen Evolution.
Nano Lett
August 2025
Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun 130012, China.
Affordable, active, and durable oxygen evolution reaction (OER) catalysts are crucial for proton exchange membrane water electrolysis (PEMWE). The low-cost RuO, relative to IrO, is attractive for acidic OER while suffering from durability. To resolve this activity-stability dilemma of RuO, we propose a universal nonmetal-metal strategy to reduce Ru-O covalency while promoting local reactive water concentration for efficient acidic OER.
View Article and Find Full Text PDF4f-modified Ru-O polarity as a descriptor for efficient electrocatalytic acidic oxygen evolution.
Nat Commun
July 2025
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, PR China.
The development of non-iridium-based oxygen evolution reaction (OER) catalysts is crucial for proton exchange membrane water electrolysis (PEMWE), but hydrogen production remains a great challenge because of sluggish OER kinetics and severe catalyst dissolution. Here, we present a 4f-induced covalent polarity modulation strategy for the construction of 4f-orbital-modified RuO (4f-RuO) nanocatalysts with tunable Ru-O polarity. We find that the OER activity of 4f-RuO shows a volcano shape as a function of the polarity of Ru-O bond.
View Article and Find Full Text PDFStabilizing Ru-Based Catalysts against Bromine Poisoning through Ru-O Covalency Regulation for Durable Brominated Volatile Organic Compound Oxidation.
Environ Sci Technol
July 2025
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
Catalytic oxidation is an effective approach for brominated volatile organic compound (BVOC) abatement to reduce its negative environmental impacts, yet its application is severely hindered by catalyst bromine poisoning. The unique bromine-induced lattice oxygen substitution may constitute a key deactivation pathway in catalytic BVOC degradation, necessitating the stabilization of lattice oxygen as the pivotal challenge. Herein, we report an Sn-mediated Ru-O covalency regulation strategy to stabilize the lattice oxygen of RuO against bromine poisoning.
View Article and Find Full Text PDFOptimizing the Ru Catalyst-Support Interaction via Tunnel Size of MnO Support for Enhanced Acidic Water Oxidation.
J Am Chem Soc
July 2025
Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
Metal-support interaction (MSI) has profound impacts on the catalytic performance of heterogeneous catalysts. Rational modulation of MSI will give rise to unusually high activity and stability. Here, we demonstrate that the MSI strength can be effectively tuned by the tunnel size of MnO supports to help address the two fundamental challenges in Ru-based acidic oxygen evolution reaction (OER): the sluggish kinetics and the instability of Ru sites.
View Article and Find Full Text PDFSingle-Atom Ru-Triggered Lattice Oxygen Redox Mechanism for Enhanced Acidic Water Oxidation.
J Am Chem Soc
May 2025
Advanced Materials and Catalysis Group, Center of Chemistry for Frontier Technologies, State Key Laboratory of Clean Energy Utilization, Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China.
Activating the oxygen anionic redox presents a promising avenue for developing highly active oxygen evolution reaction (OER) electrocatalysts for proton-exchange membrane water electrolyzers (PEMWE). Here, we engineered a lattice-confined Ru single atom dispersed on a lamellar manganese oxide (MnO) cation site. The strong Ru-O bond induced an upward shift in the O 2 band, enhancing metal-oxygen covalency and reshaping the OER mechanism toward lattice oxygen oxidation pathway with increased activity.
View Article and Find Full Text PDF