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Graphene Layer Encapsulation of Non-Noble Metal Nanoparticles as Acid-Stable Hydrogen Evolution Catalysts AITranslate

Kailong Hu; Tatsuhiko Ohto; Linghan Chen; Jiuhui Han; Mitsuru Wakisaka; Yuki Nagata; Junichi Fujita; Yoshikazu Ito;
University of Tsukuba; Osaka University; Tohoku University; Tohoku University; Toyama Prefectural University;Max Planck Institute for Polymer Research; University of Tsukuba; University of Tsukuba
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Publisher: ACS
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Abstract AITranslate

Acid-stable, non-noble catalysts are promising for hydrogen evolution reaction (HER); however, they get easily damaged when used in acidic electrolytes, thus reducing the HER lifetimes. Moreover, completely blocking catalysts from acidic electrolytes degrades HER performance. To achieve a balance between the HER lifetime and performance, we vary the number of N-doped graphene layers (1–2, 2–3, and 3–5 layers) encapsulating NiMo nanoparticles as efficient HER catalysts and obtain the optimal number of protective layers. Our data show that 3–5 graphene layers achieved the best balance, with a stable current density of 100 mA cm–2 for 25 h in 0.5 M H2SO4. Density functional theory calculations are performed to show the effect of encapsulating graphene layer number on the catalytic activity and protection of non-noble NiMo in acidic electrolytes.

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DOI：https://doi.org/10.1021/acsenergylett.8b00739

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Citation Information:

Acid-stable, non-noble catalysts are promising for hydrogen evolution reaction (HER); however, they get easily damaged when used in acidic electrolytes, thus reducing the HER lifetimes. Moreover, completely blocking catalysts from acidic electrolytes degrades HER performance. To achieve a balance between the HER lifetime and performance, we vary the number of N-doped graphene layers (1–2, 2–3, and 3–5 layers) encapsulating NiMo nanoparticles as efficient HER catalysts and obtain the optimal number of protective layers. Our data show that 3–5 graphene layers achieved the best balance, with a stable current density of 100 mA cm–2 for 25 h in 0.5 M H2SO4. Density functional theory calculations are performed to show the effect of encapsulating graphene layer number on the catalytic activity and protection of non-noble NiMo in acidic electrolytes.

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GB/T 7714-2015 [1] Kailong Hu, Tatsuhiko Ohto, Linghan Chen, et al. ACS Energy Letters, 2018(3). DOI:10.1021/acsenergylett.8b00739.
MLA [1] Kailong Hu, et al., ACS Energy Letters, no. 3, 2018, https://doi.org/10.1021/acsenergylett.8b00739.
APA [1] Kailong Hu, Tatsuhiko Ohto, Linghan Chen, Jiuhui Han, Mitsuru Wakisaka, Yuki Nagata, Junichi Fujita, & Yoshikazu Ito. (2018). ACS Energy Letters(3). https://doi.org/10.1021/acsenergylett.8b00739
IEEE [1] Kailong Hu, Tatsuhiko Ohto, Linghan Chen, Jiuhui Han, Mitsuru Wakisaka, Yuki Nagata, Junichi Fujita, and Yoshikazu Ito, ACS Energy Letters, no. 3, 2018, doi: 10.1021/acsenergylett.8b00739.