Enhanced Hydrogen Release from Hydrogen Boride Nanosheets via Carbon Doping

Hydrogen boride (HB) nanosheets, which exhibit unique BHB bonding and intrinsic hydrogen release properties, show improved performance upon carbon doping. Herein, the synthesis of carbon‐doped HB via ion exchange is demonstrated by using carbon‐doped MgB 2 as a precursor. Comprehensive spectroscopic analyses inferred carbon substitution at boron sites, leading to structural distortions and electronic modifications. These changes weaken BHB bonds, thereby facilitating improved hydrogen release under both thermal and ultraviolet (UV) stimuli. Temperature‐programed desorption measurements reveal a reduction in the activation energy for intralayer hydrogen desorption with increasing carbon content, while UV‐induced hydrogen evolution shows a markedly lower onset threshold. Density functional theory calculations support these experimental findings, further demonstrating elongation of BB distances and shifts in vibrational modes. Overall, these results establish carbon doping as an effective strategy for modulating the chemical and electronic environment of HB, offering a promising pathway toward high‐efficiency, tunable hydrogen storage, and release materials.

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Publication Details

Journal
Small Structures
Published
2025-10-26
DOI
https://doi.org/10.1002/sstr.202500578
Primary Topic
Boron and Carbon Nanomaterials Research
Type
article
Field-Weighted Citation Impact
0.00
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article

Enhanced Hydrogen Release from Hydrogen Boride Nanosheets via Carbon Doping

Hideo Hosono, Masayuki Toyoda, Osamu Oki, Reiya Kawamura et al.
Small Structures
Boron and Carbon Nanomaterials Research
article

Enhanced Hydrogen Release from Hydrogen Boride Nanosheets via Carbon Doping

Hideo Hosono, Masayuki Toyoda, Osamu Oki, Reiya Kawamura, Kazuaki Kisu, Tomoharu Tokunaga, Masahiro Miyauchi, Rika Tanaka, Iwao Matsuda, Ryota Ishibiki, Yoshitaka Fujimoto, Toyoto Sato, Riku Kawamura, Akiyasu Yamamoto, Shin‐ichi Orimo, Masato Kotsugi, Arpita Varadwaj, Takahiro Kondo, Takeshi Fujita, Shin‐ichi Ito, Susumu Saito
article en

Abstract

Hydrogen boride (HB) nanosheets, which exhibit unique BHB bonding and intrinsic hydrogen release properties, show improved performance upon carbon doping. Herein, the synthesis of carbon‐doped HB via ion exchange is demonstrated by using carbon‐doped MgB 2 as a precursor. Comprehensive spectroscopic analyses inferred carbon substitution at boron sites, leading to structural distortions and electronic modifications. These changes weaken BHB bonds, thereby facilitating improved hydrogen release under both thermal and ultraviolet (UV) stimuli. Temperature‐programed desorption measurements reveal a reduction in the activation energy for intralayer hydrogen desorption with increasing carbon content, while UV‐induced hydrogen evolution shows a markedly lower onset threshold. Density functional theory calculations support these experimental findings, further demonstrating elongation of BB distances and shifts in vibrational modes. Overall, these results establish carbon doping as an effective strategy for modulating the chemical and electronic environment of HB, offering a promising pathway toward high‐efficiency, tunable hydrogen storage, and release materials.

Small StructuresVol. 6(12)
Tokyo Institute of Technology (JP), University of Tsukuba (JP), Tokyo University of Science (JP), Shibaura Institute of Technology (JP), Tohoku University (JP), University of Kochi (JP), National Institute for Materials Science (JP), Kochi University of Technology (JP), Advanced Institute of Materials Science (JP), Katsushika Medical Center (JP), Japan Research Institute (JP), Nagoya University (JP), The University of Tokyo (JP), Tokyo University of Agriculture and Technology (JP)
Openalex Percentile: Top 76%
Boron and Carbon Nanomaterials Research
DOIOpen Access PDFOpenAlex
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