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.

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.

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.

Ultrasmall Ru2P nanoparticles on graphene: a highly efficient hydrogen evolution reaction electrocatalyst in both acidic and alkaline media

2018 ◽  
Vol 54 (27) ◽  
pp. 3343-3346 ◽  
Author(s):  
Tingting Liu ◽  
Shuo Wang ◽  
Qiuju Zhang ◽  
Liang Chen ◽  
Weihua Hu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Media ◽  
Graphene Oxide Nanosheets ◽  
Reduced Graphene ◽  
Alkaline Conditions ◽  
Acidic And Alkaline Media

A Pt-free catalyst of ultrasmall Ru2P nanoparticles on reduced graphene oxide nanosheets (Ru2P/RGO-20) shows remarkable HER catalytic activity under acidic and alkaline conditions, respectively, both superior to those of commercial Pt/C.

scholarly journals Physicochemical and Electrical Properties of Praseodymium Oxides

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Sergio Ferro
Keyword(s):  
Catalytic Activity ◽  
Electrical Properties ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Hydrogen Evolution Reaction ◽  
Electrode Materials ◽  
Praseodymium Oxide ◽  
Lanthanide Oxides ◽  
New Ideas ◽  
The Stability

The industrial research is continuously looking for novelties that could improve the applied processes, increasing the yields, lowering the costs, or improving the performances. In industrial electrochemistry, one more aspect is the stability of electrode materials, which is generally balanced by the catalytic activity: the higher the latter, the lower the former. A compromise has to be found, and an optimization is often the result of new ideas that completely change the way of thinking. Praseodymium-oxide-based cathodes have been proved to be quite interesting devices: the hydrogen evolution reaction is guaranteed by the presence of a noble metal (platinum and/or rhodium), while the stability and poisoning resistance seem to be strongly improved by the presence of lanthanide oxides.

High-efficiency Ni–P catalysts in amorphous and crystalline states for the hydrogen evolution reaction

2020 ◽  
Vol 4 (9) ◽  
pp. 4733-4742
Author(s):  
Xuan Zhao ◽  
Xiaogang Chen ◽  
Yuanyuan Wang ◽  
Pingxin Song ◽  
Yingjiu Zhang
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Efficiency ◽  
Catalytic Performance ◽  
Excellent Catalytic Performance

An amorphous Ni–P electrode with excellent catalytic performance was prepared by a method of electrodeposition and the differences of the catalytic performance of the crystalline and amorphous Ni–P electrodes was compared.

scholarly journals Facile Synthesis of PdCuRu Porous Nanoplates as Highly Efficient Electrocatalysts for Hydrogen Evolution Reaction in Alkaline Medium

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1451
Author(s):  
Changhong Chen ◽  
Ningkang Qian ◽  
Junjie Li ◽  
Xiao Li ◽  
Deren Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
Current Density ◽  
Alkaline Media ◽  
Water Dissociation ◽  
Galvanic Replacement ◽  
Facile Synthesis ◽  
Better Than

Ru is a key component of electrocatalysts for hydrogen evolution reaction (HER), especially in alkaline media. However, the catalytic activity and durability of Ru-based HER electrocatalysts are still far from satisfactory. Here we report a solvothermal approach for the synthesis of PdCuRu porous nanoplates with different Ru compositions by using Pd nanoplates as the seeds. The PdCuRu porous nanoplates were formed through underpotential deposition (UPD) of Cu on Pd, followed by alloying Cu with Pd through interdiffusion and galvanic replacement between Cu atoms and Ru precursor simultaneously. When evaluated as HER electrocatalysts, the PdCuRu porous nanoplates exhibited excellent catalytic activity and durability. Of them, the Pd24Cu29Ru47/C achieved the lowest overpotential (40.7 mV) and smallest Tafel slope (37.5 mV dec−1) in an alkaline solution (much better than commercial Pt/C). In addition, the Pd24Cu29Ru47/C only lost 17% of its current density during a stability test for 10 h, while commercial Pt/C had a 59.5% drop under the same conditions. We believe that the electron coupling between three metals, unique porous structure, and strong capability of Ru for water dissociation are responsible for such an enhancement in HER performance.

Superhydrophilic amorphous Co–B–P nanosheet electrocatalysts with Pt-like activity and durability for the hydrogen evolution reaction

2018 ◽  
Vol 6 (44) ◽  
pp. 22062-22069 ◽  
Author(s):  
Hongming Sun ◽  
Xiaobin Xu ◽  
Zhenhua Yan ◽  
Xiang Chen ◽  
Lifang Jiao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Media

Superhydrophilic ternary Co–B–P nanosheets are developed as a hydrogen evolution electrocatalyst showing Pt-like catalytic activity and superior stability in alkaline media.

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.

Tuning the Edge-Site Activity of 2H Phase MoSe2 for Hydrogen Evolution Reaction via Sulfur Substitution and Strain Engineering

2020 ◽  
Vol 12 (10) ◽  
pp. 1446-1456
Author(s):  
Ziwei Xu ◽  
Guanghui Zhao ◽  
Mingyuan Wang ◽  
Jingjing Liang ◽  
Shahid Hussain ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Density Functional ◽  
High Efficiency ◽  
Low Cost ◽  
Catalytic Efficiency ◽  
Strain Engineering ◽  
Catalyst Design ◽  
Potential Candidate

The 2H phase MoSe2 of high chemical stability and excellent catalytic activity is a promising catalyst for the hydrogen evolution reaction (HER) as a potential candidate, due to its low cost, high efficiency and abundant production. However, the HER catalytic efficiency of MoSe2 largely depends on the activity of reaction sites including the basal plane and the edges, and remains low because only the Mo edge sites are active. Herein, we have calculated the structural stability, catalytic activity, and strain engineering on sulfur substituted MoSe2 catalytic structures (Mo(Se1–xSx)2) by density functional theory. The results demonstrate that most of Mo(Se1–xSx)2 monolayers are thermodynamically stable and the HER activity of the Mo(Se1–xSx)2 monolayers can be effectively tuned by both element substitution and strain engineering with the mechanisms uncovered at the atomic level. This study provides the experiments theoretical references for the novel catalyst design of the hydrogen evolution reaction.

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.

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