Hydrogen evolution in alkaline medium on intratube and surface decorated PtRu catalyst

Ali, Farhan S. M. ¹Arevalo, Ryan Lacdao ²Vandichel, Matthias ²Speck, Florian ³Rautama, Eeva-Leena ¹Jiang, Hua ¹Sorsa, Olli ¹Mustonen, Kimmo ⁴Cherevko, Serhiy ³Kallio, Tanja¹

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作者信息

1. Aalto Univ
2. Univ Limerick
3. Forschungszentrum Julich
4. Univ Vienna
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Abstract

For anion exchange membrane (AEM) electrolysis, challenges include finding an optimal catalyst for hydrogen evolution reaction (HER), as the noble metals are scarce while non-noble metals are inferior. Here, the noble metal amount is reduced in a straightforward solution synthesis which produces Pt-Ru surface nanoparticles and unique intratube nanowires decorated on single walled carbon nanotubes (SWNT). In half-cell tests, 5 wt(PtRu),-% Pt-Ru SWNT demonstrates stable 10 mA cm(-2) HER current at 46 mV overpotential and outperforms commercial electrocatalysts. When integrated in an AEM electrolyser, a high current density of 500 mA cm(-2) at a low voltage of 1.72 V is achieved with 34 mu g cm(-2) metal loading. First-principles calculations reveal that both the Pt-Ru alloy nanoparticle and intratube nanowires promote near optimal H* binding energy, thereby releasing the H-2 faster. Thus, our approach yields an active low metal loading alkaline HER catalyst without sacrificing the performance in an AEM electrolyser.

Key words

Hydrogen evolution reaction/Nanowire/Single walled carbon nanotubes/Alkaline medium/Electrolyser/DENSITY-FUNCTIONAL THEORY/WALLED CARBON NANOTUBES/EFFICIENT/PLATINUM/METHANOL/NANOPARTICLES/OXIDATION/NANOWIRES/ELECTRODE/STORAGE

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量5

参考文献量53

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