Synthesis of hierarchical MoSe2 nanolayers on sodium sulfide crystals for electrocatalytic hydrogen evolution

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xiaoshuang Chen ◽  
Meina Ju ◽  
Kun Song ◽  
Guoli Chen ◽  
Rui Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
High Performance ◽  
Sodium Sulfide ◽  
Hydrogen Generation ◽  
Clean Energy

Hydrogen generation via water electroreduction is a pivotal portion of exploiting clean-energy skills. Nevertheless, developing a low price and high-performance catalytic activity substance to take the place of expensively precious...

Ultrafast synthesis of molybdenum carbide nanoparticles for efficient hydrogen generation

2017 ◽  
Vol 5 (43) ◽  
pp. 22805-22812 ◽  
Author(s):  
Cuncai Lv ◽  
Zhipeng Huang ◽  
Qianpeng Yang ◽  
Guangfeng Wei ◽  
Zuofeng Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Carbon Coating ◽  
Molybdenum Carbide ◽  
Hydrogen Generation

A facile and ultrafast synthesis of molybdenum carbide coated with few-layer carbon (MoC/C) has been developed, and the effect of reducing the thickness of the carbon coating on its catalytic activity in the hydrogen evolution reaction (HER) has been demonstrated.

Preparation of Co3Ni Film Composed of Nanosheets and their Catalytic Activity in Hydrogen Generation from Sodium Borohydride Solution

2013 ◽  
Vol 860-863 ◽  
pp. 822-825
Author(s):  
Jin Yun Liao ◽  
Hao Li ◽  
Xi Bin Zhang
Keyword(s):  
Catalytic Activity ◽  
High Performance ◽  
Hydrogen Generation ◽  
Deposition Process ◽  
Cubic Phase ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
Original Activity ◽  
Hexagonal Close Packed ◽  
Face Centered

In this study, aiming to obtain high performance nanocatalysts for NaBH4 hydrolysis, Co3Ni film composed of nanosheets with a mean thickness of 10 nm was fabricated by a magnetic field induced deposition process. X-ray diffraction analysis indicated that the as-prepared Co3Ni film is presented in both face-centered cubic phase and hexagonal close-packed phase. The nanostructured Co3Ni film catalyst showed good catalytic activity in the hydrolysis of NaBH4 and the rate constant was 5.77 mL·min-1. It was revealed that Co3Ni film catalysts didnt lose their catalytic original activity essentially after 10 cycles, which exhibited much improved reusability and stability compared with with recently reported nanocatalysts.

Construction of CuInS2/Ag sensitized ZnO nanowire arrays for efficient hydrogen generation

RSC Advances ◽  
2015 ◽  
Vol 5 (99) ◽  
pp. 81723-81727 ◽  
Author(s):  
Zhongzhou Cheng ◽  
Xueying Zhan ◽  
Fengmei Wang ◽  
Qisheng Wang ◽  
Kai Xu ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Band Gap ◽  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
Clean Energy ◽  
Nanowire Arrays ◽  
Zno Nanowire ◽  
Energy Applications ◽  
Hydrogen Evolution Rate ◽  
Tunable Band Gap

Due to its smaller and tunable band gap, CuInS2 has attracted much attention for clean energy applications. With the synergistic effect of Ag and CuInS2 NPs, the PEC performance and hydrogen evolution rate of ZnO NWs are significantly enhanced.

Templated-preparation of a three-dimensional molybdenum phosphide sponge as a high performance electrode for hydrogen evolution

2016 ◽  
Vol 4 (1) ◽  
pp. 59-66 ◽  
Author(s):  
Chen Deng ◽  
Fei Ding ◽  
Xinyuan Li ◽  
Yaofang Guo ◽  
Wei Ni ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
High Performance ◽  
Three Dimensional ◽  
Molybdenum Phosphide ◽  
Binder Free

A sponge-shaped three-dimensional MoP (3D MoP) electrocatalyst is prepared and used as a binder-free electrode for the HER, exhibiting promising catalytic activity.

scholarly journals Surface Modifications of 2D-Ti3C2O2 by Nonmetal Doping for Obtaining High Hydrogen Evolution Reaction Activity: A Computational Approach

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 161
Author(s):  
Fangtao Li ◽  
Xiaoxu Wang ◽  
Rongming Wang
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
High Performance ◽  
Hydrogen Adsorption ◽  
Low Cost ◽  
Level Shift ◽  
High Hydrogen ◽  
Catalytic Active Sites

As a typical two-dimensional (2D) MXene, Ti3C2O2 has been considered as a potential material for high-performance hydrogen evolution reaction (HER) catalyst, due to its anticorrosion and hydrophilic surface. However, it is still a challenge to improve the Ti3C2O2 surficial HER catalytic activity. In this work, we investigated the HER activity of Ti3C2O2 after the surface was doped with S, Se, and Te by the first principles method. The results indicated that the HER activity of Ti3C2O2 is improved after being doped with S, Se, Te because the Gibbs free energy of hydrogen adsorption (ΔGH) is increased from −2.19 eV to 0.08 eV. Furthermore, we also found that the ΔGH of Ti3C2O2 increased from 0.182 eV to 0.08 eV with the doping concentration varied from 5.5% to 16.7%. The HER catalytic activity improvement of Ti3C2O2 is attributed to the local crystal structure distortion in catalytic active sites and Fermi level shift leads to the p-d orbital hybridization. Our results pave a new avenue for preparing a low-cost and high performance HER catalyst.

Hollow ZnCdS dodecahedral cages for highly efficient visible-light-driven hydrogen generation

2017 ◽  
Vol 5 (46) ◽  
pp. 24116-24125 ◽  
Author(s):  
Jianmin Chen ◽  
Junying Chen ◽  
Yingwei Li
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Cation Exchange ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Generation ◽  
Highly Efficient ◽  
Novel Approach ◽  
Exchange Processes ◽  
Visible Light Driven

A novel approach, combining sulfurization and cation-exchange processes, is developed to fabricate hollow ZnCdS rhombic dodecahedral cages from ZIF-8, which exhibit superior catalytic activity and durability for hydrogen evolution from water splitting under cocatalyst-free and visible-light driven conditions.

scholarly journals Fabrication of Highly Textured 2D SnSe Layers with Tunable Electronic Properties for Hydrogen Evolution

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3319
Author(s):  
Qianyu Zhou ◽  
Mengya Wang ◽  
Yong Li ◽  
Yanfang Liu ◽  
Yuanfu Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Electronic Properties ◽  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
Cost Effective ◽  
Clean Energy ◽  
Two Dimensional Materials ◽  
Structural And Electronic Properties ◽  
Electron Migration ◽  
P Type

Hydrogen is regarded to be one of the most promising renewable and clean energy sources. Finding a highly efficient and cost-effective catalyst to generate hydrogen via water splitting has become a research hotspot. Two-dimensional materials with exotic structural and electronic properties have been considered as economical alternatives. In this work, 2D SnSe films with high quality of crystallinity were grown on a mica substrate via molecular beam epitaxy. The electronic property of the prepared SnSe thin films can be easily and accurately tuned in situ by three orders of magnitude through the controllable compensation of Sn atoms. The prepared film normally exhibited p-type conduction due to the deficiency of Sn in the film during its growth. First-principle calculations explained that Sn vacancies can introduce additional reactive sites for the hydrogen evolution reaction (HER) and enhance the HER performance by accelerating electron migration and promoting continuous hydrogen generation, which was mirrored by the reduced Gibbs free energy by a factor of 2.3 as compared with the pure SnSe film. The results pave the way for synthesized 2D SnSe thin films in the applications of hydrogen production.

Copper aided exchange in high performance oxygen production by CuCo binary oxides for clean energy delivery

2015 ◽  
Vol 3 (33) ◽  
pp. 17344-17350 ◽  
Author(s):  
Julius Motuzas ◽  
João C. Diniz da Costa
Keyword(s):  
Catalytic Activity ◽  
High Performance ◽  
Clean Energy ◽  
High Oxygen ◽  
Oxygen Production ◽  
Binary Oxides ◽  
Energy Delivery ◽  
Redox Cycles ◽  
Oxygen Capacity

High oxygen capacity in CoyCu1−yOx with short redox cycles of 125 °C, assisted by the catalytic activity of Cu oxides.

Modulating the surface segregation of PdCuRu nanocrystals for enhanced all-pH hydrogen evolution electrocatalysis

2019 ◽  
Vol 7 (35) ◽  
pp. 20151-20157 ◽  
Author(s):  
Menggang Li ◽  
Mingchuan Luo ◽  
Zhonghong Xia ◽  
Yong Yang ◽  
Yarong Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
High Performance ◽  
Surface Segregation ◽  
Core Shell ◽  
Ph Values

Core–shell PdCuRu trimetallic nanocrystals with a Pd-rich shell can be obtained by leveraging controlled surface segregation, and high-performance HER catalytic activity finally was achieved at all pH values.

A 3D Co–CN framework as a high performance electrocatalyst for the hydrogen evolution reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 42014-42018 ◽  
Author(s):  
Jie Chen ◽  
Haifeng Zhou ◽  
Yongjun Huang ◽  
Huiwu Yu ◽  
Fuying Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Performance ◽  
High Catalytic Activity ◽  
Alkaline Electrolytes ◽  
Current Densities

A 3D Co–CN framework was synthesized with the Co–CN electrode showing exceptionally high catalytic activity and good durability. Only requiring overpotentials of 181 mV and 266 mV to afford current densities of 10 mA cm−2 in acid and alkaline electrolytes, respectively.

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