Enhanced catalytic activity of edge-exposed 1T phase WS2 grown directly on a WO3 nanohelical array for water splitting

2019 ◽  
Vol 7 (46) ◽  
pp. 26378-26384 ◽  
Author(s):  
Noho Lee ◽  
Il Yong Choi ◽  
Kyung-Yeon Doh ◽  
Jaewon Kim ◽  
Hyeji Sim ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Catalytic Performance ◽  
Surface Modified

A hierarchical electrode consisting of edge-exposed 1T phase WS2, grown on an array of surface-modified WO3 nanohelixes (NHs), and its enhanced catalytic performance in the hydrogen evolution reaction (HER) are presented.

Monocrystalline platinum–nickel branched nanocages with enhanced catalytic performance towards the hydrogen evolution reaction

Nanoscale ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 5072-5077 ◽  
Author(s):  
Zhenming Cao ◽  
Huiqi Li ◽  
Chenyang Zhan ◽  
Jiawei Zhang ◽  
Wei Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
Catalytic Performance ◽  
Enhanced Stability

Monocrystalline Pt–Ni nanocages were successfully fabricated and exhibited great catalytic activity and enhanced stability for HER in alkaline solution.

Ultrathin molybdenum disulfide/carbon nitride nanosheets with abundant active sites for enhanced hydrogen evolution

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 1766-1773 ◽  
Author(s):  
Xingyue Qian ◽  
Junfei Ding ◽  
Jianli Zhang ◽  
Yue Zhang ◽  
Yining Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Molybdenum Disulfide ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Carbon Nitride ◽  
Carbon Nitride Nanosheets

The molybdenum disulfide/carbon nitride (MoS2/C3N4-3) nanosheets with ultrathin thickness present superior catalytic activity for hydrogen evolution reaction for water splitting.

Nickel phosphide polymorphs with an active (001) surface as excellent catalysts for water splitting

CrystEngComm ◽  
2019 ◽  
Vol 21 (7) ◽  
pp. 1143-1149 ◽  
Author(s):  
Chan Su Jung ◽  
Kidong Park ◽  
Yeron Lee ◽  
In Hye Kwak ◽  
Ik Seon Kwon ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Nickel Phosphide ◽  
Controlled Synthesis ◽  
Temperature Controlled

We report the temperature-controlled synthesis of two nickel phosphide polymorphs, Ni2P and Ni5P4, by phosphorization of Ni foil or foams using phosphine gas, and their excellent catalytic activity toward hydrogen evolution reaction.

Metallic 1T-VS2 nanosheets featuring V2+ self-doping and mesopores towards an efficient hydrogen evolution reaction

2019 ◽  
Vol 6 (12) ◽  
pp. 3510-3517 ◽  
Author(s):  
Jun Xu ◽  
Yuan Zhu ◽  
Bansui Yu ◽  
Changji Fang ◽  
Junjun Zhang
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
High Conductivity ◽  
Electrochemical Water Splitting

Metallic 1T-VS2 nanosheets featuring V2+-doping and plenty of mesopores have abundant defects and high conductivity and exhibit superior catalytic activity for electrochemical water splitting.

scholarly journals System Theoretical Study on the Effect of Variable Nonmetallic Doping on Improving Catalytic Activity of 2D-Ti3C2O2 for Hydrogen Evolution Reaction

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2497
Author(s):  
Ye Su ◽  
Minhui Song ◽  
Xiaoxu Wang ◽  
Jihang Jiang ◽  
Xiaolong Si ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Hydrogen Absorption ◽  
Density Functional ◽  
Electronic Conductivity ◽  
Dft Method ◽  
Catalytic Performance ◽  
P Element ◽  
Element Doping

2D MXenes have been found to be one of the most promising catalysts for hydrogen evolution reaction (HER) due to their excellent electronic conductivity, hydrophilic nature, porosity and stability. Nonmetallic (NM) element doping is an effective approach to enhance the HER catalytic performance. By using the density functional theory (DFT) method, we researched the effect of nonmetallic doping (different element types, variable doping concentrations) and optimal hydrogen absorption concentration on the surface of NM-Ti3C2O2 for HER catalytic activity and stability. The calculation results show that doping nonmetallic elements can improve their HER catalytic properties; the P element dopants catalyst especially exhibits remarkable HER performance (∆GH = 0.008 eV when the P element doping concentration is 100% and the hydrogen absorption is 75%). The origin mechanism of the regulation of doping on stability and catalytic activity was analyzed by electronic structures. The results of this work proved that by controlling the doping elements and their concentrations we can tune the catalytic activity, which will accelerate the further research of HER catalysts.

Hierarchical Ni/NiTiO3 derived from NiTi LDHs: a bifunctional electrocatalyst for overall water splitting

2017 ◽  
Vol 5 (47) ◽  
pp. 24767-24774 ◽  
Author(s):  
Chenlong Dong ◽  
Xiangye Liu ◽  
Xin Wang ◽  
Xiaotao Yuan ◽  
Ziwan Xu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Catalytic Performance ◽  
Alkaline Solutions ◽  
Bifunctional Electrocatalyst ◽  
Overall Water Splitting

Ni/NiTiO3 manifests remarkable catalytic performance for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in alkaline solutions.

Ultrasmall diiron phosphide nanodots anchored on graphene sheets with enhanced electrocatalytic activity for hydrogen production via high-efficiency water splitting

2016 ◽  
Vol 4 (41) ◽  
pp. 16028-16035 ◽  
Author(s):  
Huawei Huang ◽  
Chang Yu ◽  
Juan Yang ◽  
Xiaotong Han ◽  
Changtai Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Active Site ◽  
Electrocatalytic Activity ◽  
High Efficiency ◽  
Graphene Sheets

Active site-enriched Fe2P nanodots anchored on graphene sheets (Fe2P-ND/FG) exhibit enhanced catalytic activity and stability for the hydrogen evolution reaction.

MOF-derived surface modified Ni nanoparticles as an efficient catalyst for the hydrogen evolution reaction

2015 ◽  
Vol 3 (32) ◽  
pp. 16435-16439 ◽  
Author(s):  
Teng Wang ◽  
Qianyu Zhou ◽  
Xiaojuan Wang ◽  
Jie Zheng ◽  
Xingguo Li
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Metal Organic Framework ◽  
Catalytic Performance ◽  
Ni Nanoparticles ◽  
Efficient Catalyst ◽  
Thin Carbon ◽  
Metal Organic ◽  
Coating Layers ◽  
Surface Modified

Pyrolysis of a Ni based metal organic framework in NH3yields Ni nanoparticles with surface nitridation together with thin carbon coating layers. The subtle surface modification significantly improves the catalytic performance for the hydrogen evolution reaction (HER).

scholarly journals Facile Synthesis of Well-Dispersed Ni2P on N-Doped Nanomesh Carbon Matrix as a High-Efficiency Electrocatalyst for Alkaline Hydrogen Evolution Reaction

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 1022 ◽  
Author(s):  
Fan Yang ◽  
Shuo Huang ◽  
Bing Zhang ◽  
Liqiang Hou ◽  
Yi Ding ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Efficiency ◽  
Carbon Matrix ◽  
Catalytic Performance ◽  
Alkaline Media ◽  
Mesh Structure ◽  
Factors Affecting ◽  
The Stability

The development of non-noble metal hydrogen evolution catalysts that can replace Pt is crucial for efficient hydrogen production. Herein, we develop a type of well-dispersed Ni2P on N-doped nanomesh carbon (NC) electrocatalyst by a facile pyrolysis method, which shows excellent hydrogen evolution reaction (HER) catalytic performance. It is rather remarkable that the overpotential of Ni2P/NC prepared under optimal proportion is 108 mV at 10 mA·cm−2 current density in 1 M KOH solution with the tafel slope of 67.3 mV·dec−1, the catalytic activity has no significant attenuation after 1000 cycles of cyclic voltammetry (CV)method. The hydrogen evolution performance of the electrocatalytic is better than most similar catalysts in alkaline media. The unique mesh structure of the carbon component in the catalyst facilitates the exposure of the active site and reduces the impedance, which improves the efficiency of electron transport as well as ensuring the stability of the hydrogen evolution reaction. In addition, we prove that nitrogen doping and pore structure are also important factors affecting catalytic activity by control experiments. Our results show that N-doped nanomesh carbon, as an efficient support, combined with Ni2P nanoparticles is of great significance for the development of efficient hydrogen evolution electrodes.

scholarly journals Ni/NiO nanoparticles on a phosphorous oxide/graphene hybrid for efficient electrocatalytic water splitting

2017 ◽  
Vol 5 (28) ◽  
pp. 14758-14762 ◽  
Author(s):  
Juan Wang ◽  
Yanan Xie ◽  
Yuanying Yao ◽  
Xing Huang ◽  
Marc Willinger ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Graphene Sheets ◽  
Nio Nanoparticles ◽  
Phosphorus Oxide

Ni/NiO nanoparticles on phosphorus oxide-incorporated holey graphene sheets showed efficient catalytic activity and stability for hydrogen evolution reaction.

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