TY - JOUR
T1 - (NiFeCu)3S2@(NiFeCu)O Core-Shelled Heterostructure Having Dual-Anion Vacancies for Stable, High-Efficiency Urea Oxidation Reaction
AU - Indah Sari, Fitri Nur
AU - Marsaor Sihotang, Stevens
AU - Li, Siang Yun
AU - Shen, Yun Hwei
AU - Ting, Jyh Ming
N1 - Funding Information:
This work was financially supported by the Ministry of Science and Technology in Taiwan under grant no. MOST 111-2224-E-006-005.
Publisher Copyright:
© 2023 American Chemical Society.
PY - 2023/1/23
Y1 - 2023/1/23
N2 - In response to the need of stable high-efficiency electrocatalyst for urea oxidation reaction (UOR), a defect-rich (NiFeCu)3S2@(NiFeCu)O core-shelled heterostructure is presented. The core-shelled heterostructure consists of sulfur vacancy (Vs) in the crystalline core and oxygen vacancy (Vo) in the amorphous shell. The Vs enhances the charge transfer, and the Vo contributes to the mass transfer. The unique heterostructure requires only 1.37 and 1.38 V versus reversible hydrogen electrode at 100 and 180 mA cm-2, respectively, and exhibits outstanding cycle stability without potential decay after 12,000 cycles. The structural stability is also contributed by the in situ formation of Cu2O and CuO which was investigated via in situ Raman. The defect-rich (NiFeCu)3S2@(NiFeCu)O core-shelled heterostructure also shows excellent bifunctionality with an electrolyzer cell voltage of 1.47 V at 10 mA cm-2 and 180 h stability. This novel electrocatalyst is highly promising for hydrogen production and also wastewater treatment from urea decomposition.
AB - In response to the need of stable high-efficiency electrocatalyst for urea oxidation reaction (UOR), a defect-rich (NiFeCu)3S2@(NiFeCu)O core-shelled heterostructure is presented. The core-shelled heterostructure consists of sulfur vacancy (Vs) in the crystalline core and oxygen vacancy (Vo) in the amorphous shell. The Vs enhances the charge transfer, and the Vo contributes to the mass transfer. The unique heterostructure requires only 1.37 and 1.38 V versus reversible hydrogen electrode at 100 and 180 mA cm-2, respectively, and exhibits outstanding cycle stability without potential decay after 12,000 cycles. The structural stability is also contributed by the in situ formation of Cu2O and CuO which was investigated via in situ Raman. The defect-rich (NiFeCu)3S2@(NiFeCu)O core-shelled heterostructure also shows excellent bifunctionality with an electrolyzer cell voltage of 1.47 V at 10 mA cm-2 and 180 h stability. This novel electrocatalyst is highly promising for hydrogen production and also wastewater treatment from urea decomposition.
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U2 - 10.1021/acssuschemeng.2c06849
DO - 10.1021/acssuschemeng.2c06849
M3 - Article
AN - SCOPUS:85146395900
SN - 2168-0485
VL - 11
SP - 1207
EP - 1220
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
IS - 3
ER -