CrSe2 based single-cluster catalysts with controllable charge states for the oxygen reduction and hydrogen evolution reactions

Gao, Jie; Shen, Ye; Sun, Yadan; Feng, Zhiyan; Shi, Pei; Xie, Kun; Lin, Long; Guo, Xiangyu; Zhang, Shengli

doi:10.1016/j.jcis.2024.09.190

Journal of Colloid and Interface Science

2025

DOI: 10.1016/j.jcis.2024.09.190

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CrSe2 based single-cluster catalysts with controllable charge states for the oxygen reduction and hydrogen evolution reactions

Jie Gao,

Ye Shen,

Yadan Sun

et al.

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Controlled Hydrogen Loading of Magnesium Thin Films in KOH—Effects on the Hydride Nucleation and Growth Regimes

Guardi,

Sarapulova,

Dsoke

et al. 2024

Micro

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In this work, we propose a strategy to optimize electrochemical hydrogen loading in magnesium–palladium thin films, using 5 M KOH as an electrolyte. Mg thin films of thickness 26 nm were deposited on sapphire (0001) substrates and capped by a 32 nm Pd layer. By performing cyclic voltammetry with in situ optical microscopy, it appears that a loading potential of at least −1.2 V vs. Hg/HgO has to be achieved at the sample’s surface to trigger magnesium hydride formation. Loading potential effects are then further explored by hydrogenography, where different hydride formation mechanisms appear based on the actual potential. With a larger loading potential of −1.6 V vs. Hg/HgO, a magnesium hydride blocking layer is formed; in this case, Pd hydride temporarily forms in the capping layer as hydrogen diffuses towards the magnesium layer. Loading is optimized for a lower potential of −1.2 V vs. Hg/HgO, which leads to larger hydride precipitates and delays the blocking layer formation; in this case, Pd hydride only appears after the magnesium layer is completely hydrided.

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Controlled Hydrogen Loading of Magnesium Thin Films in KOH—Effects on the Hydride Nucleation and Growth Regimes

Guardi,

Sarapulova,

Dsoke

et al. 2024

Micro

View full text Add to dashboard Cite

show abstract

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CrSe2 based single-cluster catalysts with controllable charge states for the oxygen reduction and hydrogen evolution reactions

Cited by 1 publication

References 43 publications

Controlled Hydrogen Loading of Magnesium Thin Films in KOH—Effects on the Hydride Nucleation and Growth Regimes

Controlled Hydrogen Loading of Magnesium Thin Films in KOH—Effects on the Hydride Nucleation and Growth Regimes

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