Facile formation of CoN4 active sites onto a SiO2 support to achieve robust CO2 and proton reduction in a noble-metal-free photocatalytic system

2019 ◽  
Vol 7 (17) ◽  
pp. 10475-10482 ◽  
Author(s):  
Jun-Chao Hu ◽  
Meng-Xi Gui ◽  
Wu Xia ◽  
Jin Wu ◽  
Yong-Ning Zhou ◽  
...  
Keyword(s):  
Noble Metal ◽  
Active Sites ◽  
Solar Fuels ◽  
Proton Reduction ◽  
Metal Free ◽  
System P ◽  
Photocatalytic System ◽  
Sio2 Support

The conversion of CO2 and protons to solar fuels (CO and H2) is achieved by CoN4 active sites anchored on SiO2.

Atomically dispersed Ni as the active site towards selective hydrogenation of nitroarenes

2019 ◽  
Vol 21 (3) ◽  
pp. 704-711 ◽  
Author(s):  
Fan Yang ◽  
Minjian Wang ◽  
Wei Liu ◽  
Bin Yang ◽  
Ying Wang ◽  
...  
Keyword(s):  
Noble Metal ◽  
Catalytic Hydrogenation ◽  
Selective Hydrogenation ◽  
Porous Carbon ◽  
Active Site ◽  
Active Sites ◽  
Rational Design ◽  
Metal Free

Noble-metal-free catalytic hydrogenation of nitroarenes is achieved through the rational design of atomically dispersed Ni sites on N-doped porous carbon. The outstanding activity of the catalyst originates from the atomic dispersion of Ni active sites with a high Ni–N3 content.

scholarly journals Noble-Metal-Free NixSy-C3N5 Hybrid Nanosheet with Highly Efficient Photocatalytic Performance

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1089
Author(s):  
Lixiao Han ◽  
Cong Peng ◽  
Jinming Huang ◽  
Linhao Sun ◽  
Shengyao Wang ◽  
...  
Keyword(s):  
Noble Metal ◽  
Active Sites ◽  
Photocatalytic Performance ◽  
Low Cost ◽  
H2 Production ◽  
Apparent Quantum Yield ◽  
Metal Free ◽  
Highly Efficient ◽  
Multifunctional Catalyst ◽  
Photocatalytic Applications

The construction of highly efficient, low-cost and noble-metal-free photocatalysts depends on photocatalytic technology. Recently, N-rich C3N5 has been explored as a novel carbon nitride material with a much narrower band gap (~2.2 eV) than that of traditional C3N4 (~2.7 eV). Planting noble-metal-free active sites on C3N5 to improve its photocatalytic activity is of great significance. Herein, 2D NixSy nanosheet is facially loaded on 2D C3N5 using a hydrothermal procedure under a low temperature. Due to the quick separation of photogenerated carries between C3N5 and NixSy, this inexpensive noble-metal-free NixSy-C3N5 hybrid nanosheet is highly efficient and stable as a multifunctional catalyst in various applications, including photocatalytic H2 production from water and NO removal. Impressively, the apparent quantum yield (AQY) value for H2 production reaches 37.0% (at 420 nm) on optimal NixSy-C3N5 hybrids, which is much higher than that of Pt-C3N5 material. This work opens an avenue to the fabrication of low-cost and noble-metal-free catalysts for multifunctional photocatalytic applications.

scholarly journals Recent progress in g-C3N4 based low cost photocatalytic system: activity enhancement and emerging applications

2015 ◽  
Vol 5 (12) ◽  
pp. 5048-5061 ◽  
Author(s):  
Shengming Yin ◽  
Jianyu Han ◽  
Tianhua Zhou ◽  
Rong Xu
Keyword(s):  
Water Splitting ◽  
Noble Metal ◽  
Recent Progress ◽  
Low Cost ◽  
System Activity ◽  
Metal Free ◽  
Co Catalysts ◽  
Overall Water Splitting ◽  
Photocatalytic System ◽  
Activity Enhancement

Noble metal free g-C3N4 based photocatalysts find promising applications in the fields of photocatalytic H2 production, overall water splitting and CO2 reduction. Their photocatalytic can be enhanced by depositing non-noble metal co-catalysts and exfoliation to nanosheets.

A Noble-Metal-Free System for Photodriven Catalytic Proton Reduction

ChemSusChem ◽  
2013 ◽  
Vol 6 (5) ◽  
pp. 790-793 ◽  
Author(s):  
Bart van den Bosch ◽  
Hung-Cheng Chen ◽  
Jarl Ivar van der Vlugt ◽  
Albert M. Brouwer ◽  
Joost N. H. Reek
Keyword(s):  
Noble Metal ◽  
Proton Reduction ◽  
Free System ◽  
Metal Free

One-Pot Synthesis of Fe–N–C Species-Modified Carbon Nanotubes for ORR Electrocatalyst with Overall Enhanced Performance Superior to Pt/C

NANO ◽  
2021 ◽  
pp. 2150028
Author(s):  
Siqi zhao ◽  
Deliang Chen ◽  
Yawu Gao ◽  
Tao Li ◽  
Shasha Yi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Noble Metal ◽  
Active Sites ◽  
Open Circuit ◽  
Alkaline Condition ◽  
Hydrogen Electrode ◽  
One Pot ◽  
Onset Potential ◽  
Metal Free ◽  
Modified Carbon Nanotubes

Novel synthesis of efficient noble-metal-free electrocatalysts for both oxygen reduction/evolution reaction (ORR/OER) in energy conversion devices (e.g., fuel cells, metal–air batteries) is of essential significance for further sustainable development. This paper reports a facile synthesis of Fe–N–C species-modified carbon nanotubes (F/N-CNTs) for ORR application by directly pyrolyzing a fluffy hybrid precursor at a moderate temperature ([Formula: see text]C) in Ar. The fluffy hybrid precursors consisting of nitro-hydrochloric-acid-treated CNTs, melamine and Fe[Formula: see text] species are prepared via a freeze-drying method. On account of the synergistic effect of various active sites, including pyridine–N, Fe–Nx and Fe3C, and the high conductivity of the CNTs matrix, the as-obtained F/N-CNT electrocatalysts exhibit excellent ORR activities, comparable to commercial Pt/C. The addition of N heteroatoms, the dosage of Fe and the pyrolysis temperature highly influence the ORR properties of the F/N-CNT samples. The typical F/N-CNT sample obtained at the optimized parameters shows an onset potential of 1.06[Formula: see text]V and a half-wave potential of 0.91[Formula: see text]V versus reversible hydrogen electrode (RHE) in an alkaline condition, more positive than those (1.01[Formula: see text]V and 0.88[Formula: see text]V versus RHE) of Pt/C. The F/N-CNT exhibits outstanding bifunctional ORR/OER activity and excellent methanol tolerance, and the F/N-CNT-based Zn–air battery (ZAB) with an open-circuit voltage (OCV) of 1.405[Formula: see text]V presents a current density of 125[Formula: see text]mA[Formula: see text]cm[Formula: see text] and a power density of 76.5[Formula: see text]mW[Formula: see text]cm[Formula: see text]; these electrocatalytic properties are highly superior to Pt/C. The direct pyrolysis of fluffy hybrid precursors provides a concise but robust technical platform to achieve high-performance noble-metal-free electrocatalysts with ORR/OER activities superior to Pt/C.

Photocatalytic hydrogen evolution from a cobalt/nickel complex with dithiolene ligands under irradiation with visible light

2015 ◽  
Vol 5 (4) ◽  
pp. 2332-2339 ◽  
Author(s):  
Heng Rao ◽  
Zhi-Yuan Wang ◽  
Hui-Qin Zheng ◽  
Xiao-Bo Wang ◽  
Chun-Mei Pan ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Nickel Complex ◽  
Photocatalytic Hydrogen Evolution ◽  
Metal Free ◽  
Cobalt Nickel ◽  
Photocatalytic System

Novel cobalt/nickel dithiolene complexes displayed efficient hydrogen evolution in a noble-metal-free photocatalytic system under visible light.

H2Generation from a homogeneous photocatalytic system containing noble-metal-free Co(II) complex under the irradiation of visible light

2014 ◽  
Vol 38 (15) ◽  
pp. 2003-2009 ◽  
Author(s):  
Heng Rao ◽  
Zhi-Yuan Wang ◽  
Jun Wang ◽  
Xiao-Zong Hu ◽  
Yao-Ting Fan ◽  
...  
Keyword(s):  
Visible Light ◽  
Noble Metal ◽  
Metal Free ◽  
Photocatalytic System
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