From Boron Organic Polymers to in situ Ultrafine Nano Pd and Pt: Green Synthesis and Application for High Efficiency Hydrogen Evolution

ChemCatChem ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 2362-2369 ◽  
Author(s):  
Xue Zhao ◽  
Yunfan Fu ◽  
Chen Yao ◽  
Shuran Xu ◽  
Yu Shen ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Hydrogen Evolution ◽  
High Efficiency ◽  
Organic Polymers

scholarly journals In situ synthesis of MoS2/graphene nanosheets as free-standing and flexible electrode paper for high-efficiency hydrogen evolution reaction

RSC Advances ◽  
2018 ◽  
Vol 8 (19) ◽  
pp. 10698-10705 ◽  
Author(s):  
Xianghui Zhang ◽  
Mingguang Zhang ◽  
Yiqun Tian ◽  
Jing You ◽  
Congxing Yang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Efficiency ◽  
Graphene Nanosheets ◽  
In Situ Synthesis ◽  
Solvothermal Process ◽  
Free Standing ◽  
Flexible Electrode ◽  
One Step

An improved flexible hybrid MoS2/graphene free-standing electrocatalyst paper was fabricated by a one-step in situ solvothermal process for hydrogen evolution reaction applications.

Boosting alkaline hydrogen evolution performance of Co4N porous nanowires by interface engineering of CeO2 tuning

2021 ◽  
Author(s):  
Mengjie Lu ◽  
Duo Chen ◽  
Boran Wang ◽  
Ruiqing Li ◽  
Dong Cai ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Efficiency ◽  
Interface Engineering

Via a novel facile in situ selective nitrogenization method, the high-efficiency electrocatalyst of Co4N porous nanowire by coupling CeO2 (Co4N–CeO2/NF) are fabricated for boosting HER performance.

Synergistically enhanced hydrogen evolution electrocatalysis by in situ exsolution of metallic nanoparticles on perovskites

2018 ◽  
Vol 6 (28) ◽  
pp. 13582-13587 ◽  
Author(s):  
Yinlong Zhu ◽  
Jie Dai ◽  
Wei Zhou ◽  
Yijun Zhong ◽  
Huanting Wang ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Hydrogen Evolution ◽  
Metallic Nanoparticles ◽  
High Efficiency ◽  
Hydrogen Adsorption ◽  
Water Dissociation

The metal nanoparticles (NPs)/perovskite hybrid prepared by in situ exsolution can synergistically catalyze the alkaline HER with high efficiency whereby the perovskite promotes water dissociation and metal NPs enable favorable hydrogen adsorption.

Promoting Hydrogen Evolution of g-C3N4 Based Photocatalyst by Indium and Phosphorus Co-doping

2021 ◽  
Author(s):  
Xiao-Hang Yang ◽  
Chi Cao ◽  
Zilong Guo ◽  
Xiaoyu Zhang ◽  
Yaxin Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Post Treatment ◽  
Experimental Results ◽  
Indium Chloride ◽  
Co Doping ◽  
In Situ Copolymerization ◽  
Co Doped

Indium and phosphorus co-doped g-C3N4 photocatalyst (In,P-g-C3N4) was prepared by K2HPO4 post-treatment of indium doped g-C3N4 photocatalyst (In-g-C3N4) derived from in-situ copolymerization of dicyandiamide and indium chloride. The experimental results...

scholarly journals A cross-dehydrogenative C(sp3)−H heteroarylation via photo-induced catalytic chlorine radical generation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chia-Yu Huang ◽  
Jianbin Li ◽  
Chao-Jun Li
Keyword(s):  
Hydrogen Atom ◽  
Hydrogen Evolution ◽  
Alkyl Radical ◽  
Cobalt Catalyst ◽  
Alkylation Reaction ◽  
Hydrogen Atom Abstraction ◽  
Dehydrogenative Coupling ◽  
Radical Generation ◽  
Limited Scope

AbstractHydrogen atom abstraction (HAT) from C(sp3)–H bonds of naturally abundant alkanes for alkyl radical generation represents a promising yet underexplored strategy in the alkylation reaction designs since involving stoichiometric oxidants, excessive alkane loading, and limited scope are common drawbacks. Here we report a photo-induced and chemical oxidant-free cross-dehydrogenative coupling (CDC) between alkanes and heteroarenes using catalytic chloride and cobalt catalyst. Couplings of strong C(sp3)–H bond-containing substrates and complex heteroarenes, have been achieved with satisfactory yields. This dual catalytic platform features the in situ engendered chlorine radical for alkyl radical generation and exploits the cobaloxime catalyst to enable the hydrogen evolution for catalytic turnover. The practical value of this protocol was demonstrated by the gram-scale synthesis of alkylated heteroarene with merely 3 equiv. alkane loading.

scholarly journals Influence of Casting Solvents on CO2/CH4 Separation Using Polysulfone Membranes

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 286
Author(s):  
Roba M. Almuhtaseb ◽  
Ahmed Awadallah-F ◽  
Shaheen A. Al-Muhtaseb ◽  
Majeda Khraisheh
Keyword(s):  
High Efficiency ◽  
In Situ Synthesis ◽  
Separation Process ◽  
Polymeric Membranes ◽  
Gas Mixture ◽  
Manufacturing Cost ◽  
Binary Gas Mixture ◽  
Maximum Permeability ◽  
Polysulfone Membranes

Polysulfone membranes exhibit resistance to high temperature with low manufacturing cost and high efficiency in the separation process. The composition of gases is an important step that estimates the efficiency of separation in membranes. As membrane types are currently becoming in demand for CO2/CH4 segregation, polysulfone will be an advantageous alternative to have in further studies. Therefore, research is undertaken in this study to evaluate two solvents: chloroform (CF) and tetrahydrofuran (THF). These solvents are tested for casting polymeric membranes from polysulfone (PSF) to separate every single component from a binary gas mixture of CO2/CH4. In addition, the effect of gas pressure was conducted from 1 to 10 bar on the behavior of the permeability and selectivity. The results refer to the fact that the maximum permeability of CO2 and CH4 for THF is 62.32 and 2.06 barrer at 1 and 2 bars, respectively. Further, the maximum permeability of CF is 57.59 and 2.12 barrer at 1 and 2 bars, respectively. The outcome selectivity values are 48 and 36 for THF and CF at 1 bar, accordingly. Furthermore, the study declares that with the increase in pressure, the permeability and selectivity values drop for CF and THF. The performance for polysulfone (PSF) membrane that is manufactured with THF is superior to that of CF relative to the Robeson upper bound. Therefore, through the results, it can be deduced that the solvent during in-situ synthesis has a significant influence on the gas separation of a binary mixture of CO2/CH4.

Sign in / Sign up

Export Citation Format

Share Document