Coupling NiCo catalysts with carbon quantum dots on hematite photoanodes for highly efficient oxygen evolution

2022 ◽  
Author(s):  
Yingpu Bi ◽  
Bin zhao ◽  
Chenchen Feng ◽  
Xiaojuan Huang ◽  
Yong Ding
Keyword(s):  
Quantum Dots ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Carbon Quantum Dots ◽  
Hole Transfer ◽  
Highly Efficient ◽  
Pec Water Splitting

Highly efficient hole transfer from photoanodes to oxygen evolution catalysts is crucial for solar photoelectrochemical (PEC) water splitting. Herein, we demonstrated the coupling of NiCo catalysts with carbon quantum dots...

Type-II/type-II band alignment to boost spatial charge separation: a case study of g-C3N4 quantum dots/a-TiO2/r-TiO2 for highly efficient photocatalytic hydrogen and oxygen evolution

Nanoscale ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 6037-6046 ◽  
Author(s):  
Bing-Xin Zhou ◽  
Shuang-Shuang Ding ◽  
Yan Wang ◽  
Xiao-Rui Wang ◽  
Wei-Qing Huang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Charge Separation ◽  
Band Alignment ◽  
Type Ii ◽  
Photocatalytic Water Splitting ◽  
Highly Efficient ◽  
Spatial Charge

Ti–N covalently bridged 0D/0D QCN/a-TiO2/r-TiO2 T-II/T-II heterojunctions for enhanced photocatalytic water splitting.

scholarly journals Nitrogen-incorporation activates NiFeOx catalysts for efficiently boosting oxygen evolution activity and stability of BiVO4 photoanodes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Beibei Zhang ◽  
Shiqiang Yu ◽  
Ying Dai ◽  
Xiaojuan Huang ◽  
Lingjun Chou ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Low Cost ◽  
Photocurrent Density ◽  
Partial Substitution ◽  
Hydrogen Electrode ◽  
Highly Efficient ◽  
Promising Strategy ◽  
N Incorporation ◽  
Pec Water Splitting

AbstractDeveloping low-cost and highly efficient catalysts toward the efficient oxygen evolution reaction (OER) is highly desirable for photoelectrochemical (PEC) water splitting. Herein, we demonstrated that N-incorporation could efficiently activate NiFeOx catalysts for significantly enhancing the oxygen evolution activity and stability of BiVO4 photoanodes, and the photocurrent density has been achieved up to 6.4 mA cm−2 at 1.23 V (vs. reversible hydrogen electrode (RHE), AM 1.5 G). Systematic studies indicate that the partial substitution of O sites in NiFeOx catalysts by low electronegative N atoms enriched the electron densities in both Fe and Ni sites. The electron-enriched Ni sites conversely donated electrons to V sites of BiVO4 for restraining V5+ dissolution and improving the PEC stability, while the enhanced hole-attracting ability of Fe sites significantly promotes the oxygen-evolution activity. This work provides a promising strategy for optimizing OER catalysts to construct highly efficient and stable PEC water splitting devices.

Photothermal effect of carbon quantum dots enhanced photoelectrochemical water splitting of hematite photoanodes

2020 ◽  
Vol 8 (30) ◽  
pp. 14915-14920 ◽  
Author(s):  
Xiaoqin Hu ◽  
Jing Huang ◽  
Feifan Zhao ◽  
Ping Yi ◽  
Bing He ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Charge Transport ◽  
Water Splitting ◽  
Oxidation Kinetics ◽  
Surface Oxidation ◽  
Carbon Quantum Dots ◽  
Photothermal Effect ◽  
Bulk Charge ◽  
Kinetics Of ◽  
Pec Water Splitting

The photothermal effect of CQDs is introduced to promote the bulk charge transport and surface oxidation kinetics of Co-Pi/CQDs/Fe2O3/TiO2 photoanodes simultaneously, resulting in a remarkably enhanced PEC water splitting performance.

Co3O4−δ Quantum Dots As a Highly Efficient Oxygen Evolution Reaction Catalyst for Water Splitting

2017 ◽  
Vol 9 (19) ◽  
pp. 16159-16167 ◽  
Author(s):  
Guangxing Zhang ◽  
Jie Yang ◽  
Han Wang ◽  
Haibiao Chen ◽  
Jinlong Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Highly Efficient

Carbon quantum dots enriching molecular nickel polyoxometalate over CdS semiconductor for photocatalytic water splitting

2021 ◽  
pp. 120214
Author(s):  
Yinjuan Dong ◽  
Qing Han ◽  
Qiyu Hu ◽  
Chunjiang Xu ◽  
Congzhao Dong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Splitting ◽  
Carbon Quantum Dots ◽  
Photocatalytic Water Splitting

Nitrogen doped carbon quantum dots conjugated with AgNi alloy nanoparticles as potential electrocatalyst for efficient water splitting

2020 ◽  
Vol 847 ◽  
pp. 156492 ◽  
Author(s):  
Sayed Tayyab Raza Naqvi ◽  
Tahir Rasheed ◽  
Saadat Majeed ◽  
Dilshad Hussain ◽  
Batool Fatima ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Splitting ◽  
Carbon Quantum Dots ◽  
Alloy Nanoparticles ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

Carbon quantum dots-decorated nano-zirconia: A highly efficient photocatalyst

2019 ◽  
Vol 570 ◽  
pp. 23-30 ◽  
Author(s):  
S.P. Ratnayake ◽  
M.M.M.G.P.G. Mantilaka ◽  
C. Sandaruwan ◽  
D. Dahanayake ◽  
E. Murugan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Highly Efficient

Template-directed synthesis of sulphur doped NiCoFe layered double hydroxide porous nanosheets with enhanced electrocatalytic activity for the oxygen evolution reaction

2018 ◽  
Vol 6 (7) ◽  
pp. 3224-3230 ◽  
Author(s):  
Li-Ming Cao ◽  
Jia-Wei Wang ◽  
Di-Chang Zhong ◽  
Tong-Bu Lu
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Hydrogen Energy ◽  
Highly Efficient ◽  
Porous Nanosheets ◽  
Directed Synthesis ◽  
Double Hydroxide

The development of readily available, highly efficient and stable electrocatalysts for the oxygen evolution reaction (OER) is extremely significant to facilitate water splitting for the generation of clean hydrogen energy.

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