Encapsulating Ru doped Co/Co2P nanoparticles into delignified and TEMPO oxidized wood carbon enabling efficient pH-universal hydrogen evolution reaction

IF 13.1 1区化学 Q1 Energy

Journal of Energy Chemistry Pub Date : 2025-01-16 DOI:10.1016/j.jechem.2024.12.059

Jiahui Li, Peng Huang, Zhijie Zhang, Cuihua Tian, Yu Liao, Tai Yang, Yan Qing, Yiqiang Wu

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Abstract

High-performance catalyst is significant for the sustainable hydrogen (H₂) production by electrocatalytic water splitting. Optimizing porous structure and active groups of substrate can promote the interaction of substrate and active metal particles, enabling excellent catalytic properties and stability. Herein, the optimization strategy of delignification and 2,2,6,6-tetramethylpyperidine-1-oxyl (TEMPO) oxidization was developed to modify the porous structure and active groups of wood substrate, and Ru doped Co/Co₂P (Ru-Co/Co₂P) nanoparticles were encapsulated into the optimized wood carbon substrate (Ru-Co/Co₂P@TDCW) for the efficient pH-universal hydrogen evolution reaction (HER). The nanopore and carboxyl groups were produced by delignification and TEMPO oxidation, which accelerated the dispersion and deposition of Ru-Co/Co₂P nanoparticles. The RuCo alloy and RuCoP nanoparticles were produced with the doping of Ru, and more Ru-Co/Co₂P nanoparticles were anchored by the delignified and TEMPO oxidized wood carbon (TDCW). As anticipated, the Ru-Co/Co₂P@TDCW catalyst exhibited excellent pH-universal HER activity, and only 16.6, 93, and 43 mV of overpotentials were required to deliver the current density of 50 mA cm⁻² in alkaline, neutral, and acidic electrolytes, outperforming the noble Pt/C/TDCW catalyst significantly. In addition, Ru-Co/Co₂P@TDCW catalyst presented excellent stability for more than 600 h working at 100 mA cm⁻² in alkaline solution (1.0 M KOH). Density function theory (DFT) results revealed that energy barriers for the dissociation of H₂O and the formation of H₂ were decreased by the doping of Ru, and the conductivity and efficiency of electron migration were also enhanced. This work demonstrated a strategy to optimize the structure and properties of wood carbon substrate, providing a promising strategy to synthesize high-efficiency catalyst for H₂ production.

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来源期刊

Journal of Energy Chemistry CHEMISTRY, APPLIED-CHEMISTRY, PHYSICAL

CiteScore

19.10

自引率

8.40%

发文量

3631

审稿时长

15 days

期刊介绍： The Journal of Energy Chemistry, the official publication of Science Press and the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, serves as a platform for reporting creative research and innovative applications in energy chemistry. It mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, carbon dioxide, electrochemical energy and hydrogen energy, as well as the conversions of biomass and solar energy related with chemical issues to promote academic exchanges in the field of energy chemistry and to accelerate the exploration, research and development of energy science and technologies. This journal focuses on original research papers covering various topics within energy chemistry worldwide, including: Optimized utilization of fossil energy Hydrogen energy Conversion and storage of electrochemical energy Capture, storage, and chemical conversion of carbon dioxide Materials and nanotechnologies for energy conversion and storage Chemistry in biomass conversion Chemistry in the utilization of solar energy