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Catalysts 2016, 6(1), 5; doi:10.3390/catal6010005

Electrocatalytic Oxidation of Cellulose to Gluconate on Carbon Aerogel Supported Gold Nanoparticles Anode in Alkaline Medium

Department of Chemistry, Tongji University, Shanghai 200092, China
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Author to whom correspondence should be addressed.
Academic Editor: Rafael Luque
Received: 25 November 2015 / Revised: 24 December 2015 / Accepted: 25 December 2015 / Published: 30 December 2015
(This article belongs to the Special Issue Catalytic Conversion of Biomass)
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Abstract

The development of high efficient and low energy consumption approaches for the transformation of cellulose is of high significance for a sustainable production of high value-added feedstocks. Herein, electrocatalytic oxidation technique was employed for the selective conversion of cellulose to gluconate in alkaline medium by using concentrated HNO3 pretreated carbon aerogel (CA) supported Au nanoparticles as anode. Results show that a high gluconate yield of 67.8% and sum salts yield of 88.9% can be obtained after 18 h of electrolysis. The high conversion of cellulose and high selectivity to gluconate could be attributed to the good dissolution of cellulose in NaOH solution which promotes its hydrolysis, the surface oxidized CA support and Au nanoparticles catalyst which possesses high amount of active sites. Moreover, the bubbled air also plays important role in the enhancement of cellulose electrocatalytic conversion efficiency. Lastly, a probable mechanism for electrocatalytic oxidation of cellulose to gluconate in alkaline medium was also proposed. View Full-Text
Keywords: cellulose; alkaline condition; electrocatalytic oxidation; carbon aerogel supported Au nanoparticles; gluconate cellulose; alkaline condition; electrocatalytic oxidation; carbon aerogel supported Au nanoparticles; gluconate
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Xiao, H.; Wu, M.; Zhao, G. Electrocatalytic Oxidation of Cellulose to Gluconate on Carbon Aerogel Supported Gold Nanoparticles Anode in Alkaline Medium. Catalysts 2016, 6, 5.

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