To study the effect of adjacent hydroxyl to the active sites, several acid catalysts, i.e. substituted benzoic acids with adjacent carboxyl are employed in the fructose dehydration to 5-hydroxymethylfurfural(HMF).Expe...To study the effect of adjacent hydroxyl to the active sites, several acid catalysts, i.e. substituted benzoic acids with adjacent carboxyl are employed in the fructose dehydration to 5-hydroxymethylfurfural(HMF).Experimental results reveal that Br?nsted acid sites with adjacent carboxyl present higher catalytic ability than isolated ones. Computational results suggest that the adjacent sites lead to co-interaction on fructose, corresponding more stable transition state and faster HMF formation rate. Based on the enhancement from the adjacent sites, a novel ordered mesoporous carbon(OMC) full of carboxyls in surface is prepared and turns out to be an effective solid catalyst for HMF production from fructose derived from biomass.展开更多
Dear Editor,Machines,powered by artificial intelligence(AI)and other innovations,are expanding the scope of tasks that they can do.1,2 They have outperformed human professionals in objective tasks such as weather fore...Dear Editor,Machines,powered by artificial intelligence(AI)and other innovations,are expanding the scope of tasks that they can do.1,2 They have outperformed human professionals in objective tasks such as weather forecasting and image-based disease diagnosis.They are even reaching or surpassing humans in subjective and creative tasks.In late November 2022,OpenAI released an AI chatbot named ChatGPT-3.5(hereafter,ChatGPT)and an image generator named DALL-E2,which took the internet by storm with their excellent capabilities in understanding human intentions and performing various human tasks.展开更多
基金supported by the National Key R&D Program of China(2017YFB0702800)the National Natural Science Foundation of China(2152780065,91634201 and 21720102001)the Strategic Priority Research Program of Chinese Academy of Sciences(XDB17000000)~~
基金supported by the Natural Science Foundation of Jiangsu Province (BK20151380)NSF of China (21103087 and 21872067)supported by the Fundamental Research Funds for the Central Universities (020514380116)。
文摘To study the effect of adjacent hydroxyl to the active sites, several acid catalysts, i.e. substituted benzoic acids with adjacent carboxyl are employed in the fructose dehydration to 5-hydroxymethylfurfural(HMF).Experimental results reveal that Br?nsted acid sites with adjacent carboxyl present higher catalytic ability than isolated ones. Computational results suggest that the adjacent sites lead to co-interaction on fructose, corresponding more stable transition state and faster HMF formation rate. Based on the enhancement from the adjacent sites, a novel ordered mesoporous carbon(OMC) full of carboxyls in surface is prepared and turns out to be an effective solid catalyst for HMF production from fructose derived from biomass.
文摘Dear Editor,Machines,powered by artificial intelligence(AI)and other innovations,are expanding the scope of tasks that they can do.1,2 They have outperformed human professionals in objective tasks such as weather forecasting and image-based disease diagnosis.They are even reaching or surpassing humans in subjective and creative tasks.In late November 2022,OpenAI released an AI chatbot named ChatGPT-3.5(hereafter,ChatGPT)and an image generator named DALL-E2,which took the internet by storm with their excellent capabilities in understanding human intentions and performing various human tasks.
