A high-efficiency noble metal-free electrocatalyst of cobalt-iron layer double hydroxides nanorods coupled with graphene oxides grown on a nickel foam towards methanol electrooxidation

The development of high-activity and earth-abundant non-noble metal electrocatalysts for the oxygen evolution reaction (OER) is highly desirable but is an ongoing challenge facing us now.

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Facile Synthesis of Amorphous C3N4ZnxOy (x, y = 0.32–1.10) with High Photocatalytic Efficiency for Antibiotic Degradation

Catalysts ◽

10.3390/catal10050514 ◽

2020 ◽

Vol 10 (5) ◽

pp. 514

Author(s):

Ran Zhang ◽

Jing Xian Dong ◽

Guo Liang Gao ◽

Xue Lu Wang ◽

Ye-Feng Yao

Keyword(s):

Noble Metal ◽

Amorphous Materials ◽

High Efficiency ◽

Amorphous State ◽

Amorphous Structure ◽

Photocatalytic Efficiency ◽

Metal Free ◽

Synthetic Strategy ◽

Photocatalytic Reactions ◽

Antibiotic Degradation

The development of novel, noble metal-free semiconductor catalysts with high efficiency is of great importance for the degradation of organic compounds. Among them, amorphous materials have been extensively studied for their unique and commercially useful properties. Here, a completely amorphous, noble metal-free photocatalyst C3N4ZnxOy (x, y = 0.32–1.10) was successfully synthesized from urea and ZnO by a simple high-temperature polymerization method. As the Zn content increased, the short-range ordered structures of the amorphous samples were still retained, as revealed by XPS, FTIR, and ssNMR. Meanwhile, the -CN3 structures were observed to be gradually destroyed, which may make the amorphous state more favorable for photocatalytic reactions. Compared with g-C3N4, the amorphous samples showed significantly reduced intensities in the photoluminescence spectra, indicating that the recombination rate of the photo-generated charge carriers was greatly reduced. It was confirmed that the optimized sample (C3N4Zn0.61O0.61) achieved a photocatalytic efficiency of 86.1% in the degradation of tetracycline hydrochloride under visible light irradiation within 1 h. This is about 2 times higher than that of both g-C3N4 and ZnO. This study emphasizes the importance of the amorphous structure in photocatalytic reactions, and this synthetic strategy may provide an effective model for designing other novel catalysts.

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ZnO nanorods modified with noble metal-free Co3O4 nanoparticles as a photocatalyst for efficient ethylene degradation under light irradiation

Catalysis Science & Technology ◽

10.1039/c9cy01732a ◽

2019 ◽

Vol 9 (21) ◽

pp. 6191-6198 ◽

Cited By ~ 4

Author(s):

Zihao Cui ◽

Xiaolei Liu ◽

Xizhuang Liang ◽

Peng Wang ◽

Qianqian Zhang ◽

...

Keyword(s):

Noble Metal ◽

High Efficiency ◽

Zno Nanorods ◽

Light Irradiation ◽

Good Stability ◽

Co3o4 Nanoparticles ◽

Simple Method ◽

Metal Free

ZnO modified with noble metal-free Co3O4 nanoparticles was prepared by a simple method and showed good stability and high efficiency for photo-oxidizing ethylene.

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Noble-metal-free Co3S4–S/G porous hybrids as an efficient electrocatalyst for oxygen reduction reaction

Chemical Science ◽

10.1039/c6sc00357e ◽

2016 ◽

Vol 7 (7) ◽

pp. 4167-4173 ◽

Cited By ~ 67

Author(s):

Wenling Gu ◽

Liuyong Hu ◽

Wei Hong ◽

Xiaofang Jia ◽

Jing Li ◽

...

Keyword(s):

Graphene Oxide ◽

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Noble Metal ◽

High Efficiency ◽

Reduction Reaction ◽

Free Oxygen ◽

Metal Free ◽

Reduced Graphene ◽

Support Matrix

A high-efficiency noble-metal-free oxygen reduction reaction (ORR) catalyst was obtained based on the pyrolysis of the inexpensive precursor cobalt dithiolene (an S4-chelate complex) on simultaneously reduced graphene oxide (GO) as a support matrix.

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