期刊
DALTON TRANSACTIONS
卷 50, 期 36, 页码 12723-12729出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1dt01855h
关键词
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资金
- National Research Foundation (NRF) of Korea [2018R1D1A1B07049046]
- Sejong University
- National Research Foundation of Korea [2018R1D1A1B07049046] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A promising bifunctional thin film-based catalyst for hydrogen generation with concurrent wastewater treatment has been developed. The catalyst showed excellent electrocatalytic activity for urea decomposition and green hydrogen fuel generation, offering a green avenue for waste-urea treatment in water and sustainable hydrogen energy production.
Hydrogen generation during wastewater treatment has remained a long-standing challenge for the environment preservation welfare. In the present work, we have fabricated a promising bifunctional thin film-based catalyst for hydrogen generation with concurrent wastewater treatment. The prepared catalyst film is a vertically oriented thin SnS (tin monosulfide) nanosheet array on a Ni-foam (SnS/NF) obtained via a solution process, demonstrating a promising electrocatalytic activity towards the generation of green H-2 fuel at the cathodic side and the decomposition of urea waste at the anodic side. Notably, while assembling two identical electrodes as cathode and anode together with a reference electrode (i.e., SnS/NF parallel to SnS/NF vs. RHE assembly) in 1 M KOH aqueous electrolyte containing 0.33 M urea, the electrolyzer electrolyzed urea at a lower cell potential of 1.37 and 1.43 V (vs. RHE) to deliver a current density of 10 mA cm(-2) and 50 mA cm(-2), respectively, for the decomposition of urea at the anodic SnS/NF electrode and green hydrogen fuel generation at the cathodic SnS/NF electrode. This activity on electrocatalytic urea decomposition lies within the best performance to those of the previously reported sulfide-based and other catalytic materials. The promising catalytic activities of the SnS catalyst film are attributed to its combined effect of self-standing nanosheet array morphology and high crystallinity, which provides abundant active sites and a facile charge transfer path between the nanosheet arrays and the electrolyte. Thus, the present work offers a green avenue to the waste-urea treatment in water and sustainable hydrogen energy production.
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