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Updated: Aug 6, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Morphology Control of Hydrogen Evolution Reaction Catalyst Promoting H2 Mass Transfer
Gaoxin Lin1,2, Anrui Dong1,2, Zhiheng Li1,2
1Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou310030, Zhejiang Province, China.
Abstract:
Gas bubble accumulation during hydrogen evolution reaction (HER) hinders mass transfer and limits ampere-scale performance, making the optimization of electrode microstructures for efficient H2 release a critical challenge. We precisely synthesized NiMo/MoO2-based catalysts in 1D nanorod (1D-NR), 2D nanosheet (2D-NS), and 3D nanosheet-rod complex (3D-SR) structures to identify the optimal structure for enhanced HER mass transfer. The 1D-NR with the open-channel structure and a small adhesive force exhibited the lowest bubble detachment time (200 ± 40 ms) and the lowest potential fluctuation. In an anion exchange membrane water electrolyzer, a 1D-NR-catalyzed device suppressed slug and annular flow, allowing bubble flow to predominantly occupy the central region of the channels at high current. The 1D-NR-catalyzed device achieved 1.87 A cm-2 at 1.8 V, representing 96.8% and 30.8% improvements over the 2D-NS and 3D-SR catalyzed devices, respectively. Moreover, the 1D-NR-catalyzed device showed long-term stability of 1400 h at 1 A cm-2.
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