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<p>In the realm of advanced materials, the development of one-dimensional (1D) nanoarrays with high-activity facets is of paramount importance due to their pivotal roles in catalysis, energy storage, and sensing applications. However, achieving a high exposure ratio of these active facets while maintaining the integrity of the 1D nanoarray morphology presents a significant challenge. Traditional surfactant-assisted synthesis methods, although effective in controlling morphology, often compromise the active site accessibility and alter the inherent properties of nanomaterials. Herein, we report a surfactant-free, thermodynamic-driven nucleation aggregation strategy that successfully increases the high-activity facet ratio in SnO<sub>2</sub> 1D nanoarrays. By precisely modulating the precursor concentration, we achieve a remarkable increase in the (101) to (110) facet ratio. The synthesized <b>Pd-SnO</b><sub><b>2</b></sub>-<b>H</b> exhibits an exceptional H<sub>2</sub> sensing performance, with one of the highest response levels recorded across various material categories, including metals, metal oxides, and carbon-based composites. Demonstrating its practical utility, <b>Pd-SnO</b><sub><b>2</b></sub>-<b>H</b> has showcased an impressively swift response time of 1.6 s to a 1% H<sub>2</sub> leak and excellent applicability under mild and harsh conditions, underscoring its potential in real-time H<sub>2</sub> monitoring. This study offers a promising pathway to overcome the synthetic challenges and unlock the full potential of 1D nanoarrays for various chemical applications.</p>

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A surfactant-free strategy to expose high-activity facets of SnO2 nanorod arrays for boosting gas sensing performance

  • 期刊论文

  • 发表日期：

    2026年3月17日

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  • Qianwen Li,
  • Kefeng Li,
  • Zhiqing Lan,
  • Weihua Deng,
  • Yu Pan,
  • Jie Chen,
  • Guane Wang,
  • Xiaoliang Ye,
  • Gang Xu

摘要

In the realm of advanced materials, the development of one-dimensional (1D) nanoarrays with high-activity facets is of paramount importance due to their pivotal roles in catalysis, energy storage, and sensing applications. However, achieving a high exposure ratio of these active facets while maintaining the integrity of the 1D nanoarray morphology presents a significant challenge. Traditional surfactant-assisted synthesis methods, although effective in controlling morphology, often compromise the active site accessibility and alter the inherent properties of nanomaterials. Herein, we report a surfactant-free, thermodynamic-driven nucleation aggregation strategy that successfully increases the high-activity facet ratio in SnO2 1D nanoarrays. By precisely modulating the precursor concentration, we achieve a remarkable increase in the (101) to (110) facet ratio. The synthesized Pd-SnO2-H exhibits an exceptional H2 sensing performance, with one of the highest response levels recorded across various material categories, including metals, metal oxides, and carbon-based composites. Demonstrating its practical utility, Pd-SnO2-H has showcased an impressively swift response time of 1.6 s to a 1% H2 leak and excellent applicability under mild and harsh conditions, underscoring its potential in real-time H2 monitoring. This study offers a promising pathway to overcome the synthetic challenges and unlock the full potential of 1D nanoarrays for various chemical applications.