Ruthenium Triazine Composite: A Good Match for Increasing Hydrogen Evolution Activity through Contact Electrification | Zendy

Ju Qiangjian | Zendy; Ma Ruguang | Zendy; Pei Yu | Zendy; Guo Beibei | Zendy; Li Zichuang | Zendy; Liu Qian | Zendy; Thomas Tiju | Zendy; Yang Minghui | Zendy; Hutchings Graham J. | Zendy; Wang Jiacheng | Zendy

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Ruthenium Triazine Composite: A Good Match for Increasing Hydrogen Evolution Activity through Contact Electrification

Author(s) -

Ju Qiangjian,

Ma Ruguang,

Pei Yu,

Guo Beibei,

Li Zichuang,

Liu Qian,

Thomas Tiju,

Yang Minghui,

Hutchings Graham J.,

Wang Jiacheng

Publication year - 2020

Publication title -

advanced energy materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 10.08

H-Index - 220

eISSN - 1614-6840

pISSN - 1614-6832

DOI - 10.1002/aenm.202000067

Subject(s) - overpotential , ruthenium , catalysis , water splitting , electrocatalyst , materials science , dissociation (chemistry) , hydrogen , composite number , inorganic chemistry , chemical engineering , electrochemistry , chemistry , electrode , organic chemistry , composite material , photocatalysis , engineering

The development of Pt‐free catalysts for the alkaline hydrogen evolution reaction (HER), which is widely used in industrial scale water‐alkali electrolyzers, remains a contemporary and pressing challenge. Ruthenium (Ru) has excellent water‐dissociation abilities and could be an alternative water splitting catalyst. However, its large hydrogen binding energy limits HER activity. Here, a new approach is proposed to boost the HER activity of Ru through uniform loading of Ru nanoparticles on triazine‐ring (C 3 N 3 )‐doped carbon (triNC). The composite (Ru/triNC) exhibits outstanding HER activity with an ultralow overpotential of ≈2 mV at 10 mA cm −2 ; thereby making it the best performing electrocatalyst hitherto reported for alkaline HER. The calculated metal mass activity of Ru/triNC is >10 and 15 times higher than that of Pt/C and Pt/triNC. Both theoretical and experimental studies reveal that the triazine‐ring is a good match for Ru to weaken the hydrogen binding on Ru through interfacial charge transfer via increased contact electrification. Therefore, Ru/triNC can provide the optimal hydrogen adsorption free energy (approaching zero), while maintaining the strong water‐dissociation activity. This study provides a new avenue for designing highly efficient and stable electrocatalysts for water splitting.

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