Catalytic Performance of Nickel Nanowires Immobilized in Silica Aerogels for the CO2 Hydration Reaction

Khalil T Hassan,Vladimir Martis,Xiao Han,Jiabin Wang,Jon J Sharp,Lidija Šiller,Gaurav A Bhaduri

doi:10.1021/acsomega.8b03361

Khalil T Hassan, Vladimir Martis + Show 5 more

Open Access

https://doi.org/10.1021/acsomega.8b03361

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Abstract

In this work, wavy nickel nanowires (NiNWs) were immobilized on mesoporous silica (SiO2) aerogels by the sol–gel method. We measured the catalytic activity of pure NiNWs and NiNW–SiO2 aerogel compo...

Highlights

The rise in atmospheric carbon dioxide (CO2) is a major factor responsible for increasing global surface temperature.[1,2] In efforts to hold the increase of the global temperature below 2°C, a multinational agreement was made in Paris to control CO2 emissions, this might be inadequate.[3]
Article nanomaterials (NiNPs and nickel nanowires (NiNWs)) are immobilized in silica aerogels, which has not been studied previously, but only it was reported as the enhanced catalytic activity of nickel nanoparticles (NiNPs) for CO2 hydration reaction (CHR) in aqueous solutions.[19]
Images (e) and (f) in Figure S1 show the porous structure of 700 ppm NiNW−silica aerogel composite

Summary

■ INTRODUCTION

The rise in atmospheric carbon dioxide (CO2) is a major factor responsible for increasing global surface temperature.[1,2] In efforts to hold the increase of the global temperature below 2. Article nanomaterials (NiNPs and NiNWs) are immobilized in silica aerogels, which has not been studied previously, but only it was reported as the enhanced catalytic activity of NiNPs for CHR in aqueous solutions.[19] The catalytic activity in a vapor phase by the cosorption at high concentration levels of CO2 and water was studied by adsorption−desorption kinetics and isotherms with a dynamic vapor sorption analyzer (DVS Vacuum). NiNWs were dried in an oven at 60 °C for 8 h When these nanowires were suspended in DI water, the pH of the suspension was acidic because of the presence of residual reactants on the surface of NiNWs. Additional purification with 6 M NaOH was conducted to make NiNWs catalytically active, that is, until NiNW suspension had near neutral pH (for further details see Supporting Information). A vacuum dynamic gravimetric vapour sorption instrument (DVS Vacuum) was used to perform binary water vapour/CO2 sorption measurements (see Supporting Information, Scheme S1)

■ RESULTS AND DISCUSSION

■ CONCLUSIONS

■ ACKNOWLEDGMENTS

■ REFERENCES