1. Department of Chemistry; College of Chemistry and Chemical Engineering, Xiamen University; Xiamen 361005 P. R. China
2. National Engineering Laboratory for Green Chemical Production of Alcohols, Ethers, and Esters, Xiamen University; Xiamen 361005 P. R. China
3. Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University; Xiamen 361005 P. R. China
4. Voiland School of Chemical Engineering and Bioengineering; Washington State University; Pullman WA 99164 USA