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Dual-Regulated Ru by Alloying and Metal-Substrate Interaction for Energy-Efficient Hydrazine Oxidation-Paired Hydrogen Production

2026Artigo científico Acesso aberto
http://hdl.handle.net/10400.22/31570
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Autores

Zhang, Qijing
Wang, Jingshu
Li, Haibo
Zeng, Suyuan
Li, Rui
Yao, Qingxia
Chen, Hongyan
Meng, Lijian
Qu, Konggang

Orientador(es)

Resumo(s)

Overall water splitting (OWS) is the most potential method for large-scale hydrogen production, but the high-potential and sluggish oxygen evolution reaction (OER) greatly impedes its efficacy. Coupling the low-potential hydrazine oxidation reaction (HzOR) with the cathodic hydrogen evolution reaction (HER) has drawn widespread attention with energy-saving advantage and safe products, which necessitates the elaborate design of advanced bifunctional electrocatalysts. Herein, only using two complexes of Ru and Pd with 2,2′-bipyridine, the novel RuPd alloy/N-codoped carbon (RuPd/NC) composite was originally synthesize by direct mixing and pyrolysis, showing superior dual activity for HER and HzOR. Particularly, to deliver the current density of 10 mA cm−2, RuPd/NC merely needs the potentials of −8 and −42 mV for alkaline HER and HzOR, far outperforming Pt/C and being most advanced among the previously studied counterparts. Moreover, the two-electrode overall hydrazine splitting (OHzS) needs ultrasmall voltages of 0.042 and 0.239 V to achieve 10 and 100 mA cm−2, displaying great energy-saving feature. Moreover, the better activity for neutral HER, HzOR and OHzS on RuPd/NC was also found compared with Pt/C. The theoretical simulations uncover the water dissociation at Ru site with the greatly reduced energy barrier followed by the H desorption on the adjacent Pd site for HER, and the optimum activation energy on Ru site for HzOR, crediting to the synergistic regulation of alloying effect and metal-substrate interaction.

Descrição

Palavras-chave

RuPd alloy Hydrogen evolution Hydrazine oxidation Metal-Substrate Interaction Dual Engineering

URI

http://hdl.handle.net/10400.22/31570

Contexto Educativo

Citação

Qijing Zhang, Hongxia Yu, Siyi Wang, Haibo Li, Suyuan Zeng, Rui Li, Qingxia Yao, Qi Zhang, Ruru Chen, Lijian Meng, Konggang Qu, Dual-Regulated Ru by alloying and Metal-Substrate interaction for Energy-Efficient hydrazine Oxidation-Paired hydrogen production, Fuel, Volume 408, 2026, 137768, ISSN 0016-2361, https://doi.org/10.1016/j.fuel.2025.137768

Projetos de investigação

Unidades organizacionais

Fascículo

Editora

Elsevier

DOI

https://doi.org/10.1016/j.fuel.2025.137768

Coleções

ISEP – DFI – Artigos

Licença CC

cclicense-by

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