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Peer-reviewedCC BY 4.0Nanomaterials

AAO Template-Assisted Fabrication of Vertically Ordered Triangular Pt/Ni Nanopillar Arrays for Enhanced Hydrogen Evolution Reaction

  • Zhiqiang Zeng1
  • Mingshu Zheng2
  • Lin Yang3
  • Rui Xu4
4 affiliations
  1. 1National Laboratory of Solid State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Physical Science Research Center, Nanjing University, Nanjing 210093, China
  2. 2School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
  3. 3Academician Expert Workstation, Jinhua University of Vocational Technology, Jinhua 321017, China
  4. 4Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V. (HZDR), 01328 Dresden, Germany
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Abstract

Vertically ordered nanopillar (NP) arrays with sharp nanoedges are attractive for electrocatalytic hydrogen evolution reaction (HER) because the vertically ordered architecture provides efficient transport pathways and large accessible surface areas, while the sharp nanoedges enhance local electric fields and current densities. However, the fabrication of such vertically ordered nanostructures with sharp nanoedges remains challenging. Here, we report an anodic aluminum oxide (AAO) template-assisted strategy to construct vertically ordered triangular Pt/Ni NP arrays with sharp nanoedges for enhanced HER activity. To demonstrate the advantages of triangular NPs, circular Pt/Ni NPs with similar dimensions, composition, Pt chemical states and crystalline phases, and core–shell structures were also fabricated by the same AAO template-assisted strategy as a control to investigate the geometric effect. Electrochemical measurements demonstrate that the triangular NPs exhibit 35% higher HER activity at −100 mV vs. RHE compared to their circular counterparts. Furthermore, COMSOL (Multiphysics 5.5) simulations reveal that the sharp nanoedges induce locally enhanced electric fields and current densities, providing critical insight into the geometry-dependent electrochemical enhancement. This work demonstrates that our AAO template-assisted strategy can construct vertically ordered nanostructures with sharp nanoedges, and that these vertically ordered sharp nanoedges can enhance HER catalytic activity.

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Cite

BibTeXRIS
BibTeX
@article{zeng2026templateassisted,
  title = {{AAO Template-Assisted Fabrication of Vertically Ordered Triangular Pt/Ni Nanopillar Arrays for Enhanced Hydrogen Evolution Reaction}},
  author = {Zhiqiang Zeng and Mingshu Zheng and Lin Yang and Rui Xu},
  journal = {Nanomaterials},
  year = {2026},
  month = oct,
  doi = {10.3390/nano16211395},
  url = {https://www.mdpi.com/2079-4991/16/21/1395},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - AAO Template-Assisted Fabrication of Vertically Ordered Triangular Pt/Ni Nanopillar Arrays for Enhanced Hydrogen Evolution Reaction
AU  - Zhiqiang Zeng
AU  - Mingshu Zheng
AU  - Lin Yang
AU  - Rui Xu
PY  - 2026
DA  - 2026/10/30
JO  - Nanomaterials
DO  - 10.3390/nano16211395
UR  - https://www.mdpi.com/2079-4991/16/21/1395
AB  - Vertically ordered nanopillar (NP) arrays with sharp nanoedges are attractive for electrocatalytic hydrogen evolution reaction (HER) because the vertically ordered architecture provides efficient transport pathways and large accessible surface areas, while the sharp nanoedges enhance local electric fields and current densities. However, the fabrication of such vertically ordered nanostructures with sharp nanoedges remains challenging. Here, we report an anodic aluminum oxide (AAO) template-assisted strategy to construct vertically ordered triangular Pt/Ni NP arrays with sharp nanoedges for enhanced HER activity. To demonstrate the advantages of triangular NPs, circular Pt/Ni NPs with similar dimensions, composition, Pt chemical states and crystalline phases, and core–shell structures were also fabricated by the same AAO template-assisted strategy as a control to investigate the geometric effect. Electrochemical measurements demonstrate that the triangular NPs exhibit 35% higher HER activity at −100 mV vs. RHE compared to their circular counterparts. Furthermore, COMSOL (Multiphysics 5.5) simulations reveal that the sharp nanoedges induce locally enhanced electric fields and current densities, providing critical insight into the geometry-dependent electrochemical enhancement. This work demonstrates that our AAO template-assisted strategy can construct vertically ordered nanostructures with sharp nanoedges, and that these vertically ordered sharp nanoedges can enhance HER catalytic activity.
SN  - 2079-4991
ER  -