Ni–Mo–O nanorod-derived composite catalysts for efficient alkaline water-to-hydrogen conversion via urea electrolysis

2018 ◽  
Vol 11 (7) ◽  
pp. 1890-1897 ◽  
Author(s):  
Zi-You Yu ◽  
Chao-Chao Lang ◽  
Min-Rui Gao ◽  
Yu Chen ◽  
Qi-Qi Fu ◽  
...  
Keyword(s):  
Energy Saving ◽  
Catalytic Performance ◽  
Alkaline Water ◽  
Composite Catalysts ◽  
Urea Electrolysis

Two Ni–Mo–O compounds show exceptional cathodic/anodic catalytic performance for urea electrolysis, suggesting a promising route to energy-saving H2 production.

Recent progress with electrocatalysts for urea electrolysis in alkaline media for energy-saving hydrogen production

2020 ◽  
Vol 10 (6) ◽  
pp. 1567-1581 ◽  
Author(s):  
Xiujuan Sun ◽  
Rui Ding
Keyword(s):  
Hydrogen Production ◽  
Energy Saving ◽  
Recent Progress ◽  
Cell Voltage ◽  
Alkaline Media ◽  
Wastewater Remediation ◽  
Urea Electrolysis

Urea electrolysis is a promising energy-saving avenue for hydrogen production owing to the low cell voltage, wastewater remediation and abundant electrocatalysts.

Ni(OH) 2 Nanosheet Electrocatalyst toward Alkaline Urea Electrolysis for Energy‐Saving Acidic Hydrogen Production

2019 ◽  
Vol 6 (20) ◽  
pp. 5313-5320 ◽  
Author(s):  
Jingting Chen ◽  
Suqin Ci ◽  
Genxiang Wang ◽  
Nangan Senthilkumar ◽  
Mengtian Zhang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Energy Saving ◽  
Urea Electrolysis ◽  
Acidic Hydrogen

A study on the Co–W activated Ni electrodes for the hydrogen production from alkaline water electrolysis – Energy saving

2011 ◽  
Vol 36 (9) ◽  
pp. 5227-5235 ◽  
Author(s):  
Milica P. Marceta Kaninski ◽  
Snezana M. Miulovic ◽  
Gvozden S. Tasic ◽  
Aleksandar D. Maksic ◽  
Vladimir M. Nikolic
Keyword(s):  
Hydrogen Production ◽  
Energy Saving ◽  
Water Electrolysis ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water

scholarly journals Mixed Metal Oxides of M1 MoVNbTeOx and TiO2 as Composite Catalyst for Oxidative Dehydrogenation of Ethane

Catalysts ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 71
Author(s):  
Yuxin Chen ◽  
Dan Dang ◽  
Binhang Yan ◽  
Yi Cheng
Keyword(s):  
Metal Oxides ◽  
Oxidative Dehydrogenation ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Mixed Metal Oxides ◽  
Gel Method ◽  
Mixed Metal ◽  
Sol Gel Method ◽  
Composite Catalysts ◽  
Oxidative Dehydrogenation Of Ethane

Composite catalysts of mixed metal oxides were prepared by mixing a phase-pure M1 MoVNbTeOx with anatase-phase TiO2. Two methods were used to prepare the composite catalysts (the simple physically mixed or sol-gel method) for the improvement of the catalytic performance in the oxidative dehydrogenation of ethane (ODHE) process. The results showed that TiO2 particles with a smaller particle size were well dispersed on the M1 surface for the sol-gel method, which presented an excellent activity for ODHE. At the same operating condition (i.e., the contact time of 7.55 gcat·h/molC2H6 and the reaction temperature of 400 °C), the M1-TiO2-SM and M1-TiO2-PM achieved the space time yields of 0.67 and 0.52 kgC2H4/kgcat/h, respectively, which were about ~76% and ~35% more than that of M1 catalyst (0.38 kgC2H4/kgcat/h), respectively. The BET, ICP, XRD, TEM, SEM, H2-TPR, C2H6-TPSR, and XPS techniques were applied to characterize the catalysts. It was noted that the introduction of TiO2 raised the V5+ abundance on the catalyst surface as well as the reactivity of active oxygen species, which made contribution to the promotion of the catalytic performance. The surface morphology and crystal structure of used catalysts of either M1-TiO2-SM or M1-TiO2-PM remained stable as each fresh catalyst after 24 h time-on-stream tests.

Transesterification Catalytic Performance of Mechanically Alloyed Eggshell Ash, Magnesium and Aluminum Oxides for Sustainable Biodiesel Production

2020 ◽  
Vol 833 ◽  
pp. 139-143 ◽  
Author(s):  
Onyeka Stanislaus Okwundu ◽  
Ahmed Hassan El-Shazly ◽  
Marwa Farouk Elkady ◽  
Mahmoud Abdelghany Shouman
Keyword(s):  
Particle Size ◽  
Milling Time ◽  
Acid Methyl Ester ◽  
Catalytic Performance ◽  
High Energy ◽  
Biodiesel Production ◽  
Composite Catalyst ◽  
Mechanically Alloyed ◽  
Aluminum Oxides ◽  
Composite Catalysts

Use of quicklime as a sole catalyst for transesterification is limited by poor chemical stability and post-reaction recovery. This study investigates the effect of dry milling time on the transesterification catalytic performance (activity and recovery) of mechanically alloyed MgO, Al2O3 and eggshell derived quicklime. Raw chicken eggshells were calcined at 900 °C. The resulting flaking eggshell ash was directly mixed and comminuted with MgO and Al2O3 in ball milling (BM) machine for 15, 30, 60, 90, 120 and 150 minutes. Each of the catalyst samples was analyzed for surface morphology and particle size distribution, and then utilized for biodiesel production. Analyses of catalyst samples showed that mean particle size reduced, while powder agglomeration advanced with milling time. Optimum catalytic performance was achieved with the composite alloyed for 120 minutes (Z120) and that resulted in fatty acid methyl ester (FAME) yield of 88.4% and catalyst recovery of 98.3%. Sample Z120 was further characterized by TEM, EDX, XRD and BET. Calcination of the composite catalyst enhanced its activity. Dry high energy BM of oxides can be utilized effectively for synthesis of composite catalysts.

Template-directed assembly of urchin-like CoSx/Co-MOF as an efficient bifunctional electrocatalyst for overall water and urea electrolysis

2020 ◽  
Vol 7 (14) ◽  
pp. 2602-2610 ◽  
Author(s):  
Huizhu Xu ◽  
Ke Ye ◽  
Kai Zhu ◽  
Jinling Yin ◽  
Jun Yan ◽  
...  
Keyword(s):  
Directed Assembly ◽  
Bifunctional Catalyst ◽  
Catalytic Performance ◽  
Bifunctional Electrocatalyst ◽  
Urea Electrolysis

The urchin-like CoSx/Co-MOF as a bifunctional catalyst has good catalytic performance toward UOR and HER.

scholarly journals Improving the catalytic performance of Pichia pastoris whole-cell biocatalysts by fermentation process

RSC Advances ◽  
2021 ◽  
Vol 11 (57) ◽  
pp. 36329-36339
Author(s):  
Denggang Wang ◽  
Meiqi Chen ◽  
Xin Zeng ◽  
Wenjie Li ◽  
Shuli Liang ◽  
...  
Keyword(s):  
Pichia Pastoris ◽  
Energy Saving ◽  
Fermentation Process ◽  
Catalytic Performance ◽  
Substrate Transport ◽  
Whole Cell

Fermentation process was applied to relieve the substrate transport-limitation of P. pastoris whole-cell biocatalysts, which was much simpler, more energy-saving and greener than c traditional permeabilizing reagent and ultrasonication treatment.

Defect-rich Ni(OH)2/NiO regulated by WO3 as core-shell nanoarrays achieving energy-saving water-to-hydrogen conversion via urea electrolysis

2022 ◽  
pp. 134497
Author(s):  
Jiayang Zhao ◽  
Yao Zhang ◽  
Haoran Guo ◽  
Junkai Ren ◽  
Haotian Zhang ◽  
...  
Keyword(s):  
Energy Saving ◽  
Core Shell ◽  
Urea Electrolysis

The construction of self-supported thorny leaf-like nickel-cobalt bimetal phosphides as efficient bifunctional electrocatalysts for urea electrolysis

2019 ◽  
Vol 7 (15) ◽  
pp. 9078-9085 ◽  
Author(s):  
Linna Sha ◽  
Jinling Yin ◽  
Ke Ye ◽  
Gang Wang ◽  
Kai Zhu ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Energy Saving ◽  
Water Splitting ◽  
Cost Effective ◽  
Overall Water Splitting ◽  
Nickel Cobalt ◽  
Bifunctional Electrocatalysts ◽  
Urea Electrolysis ◽  
Construction Of Self ◽  
Wastewater Pollution

Urea electrolysis offers the prospect of cost-effective and energy-saving hydrogen production together with mitigating urea-rich wastewater pollution instead of overall water splitting.

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