文献类型：期刊文献

英文题名：Nickel nanoparticles coated with graphene layers as efficient co-catalyst for photocatalytic hydrogen evolution

作者：Fang, Li Jun[1,2];Wang, Xue Lu[1];Li, Yu Hang[1];Liu, Peng Fei[1];Wang, Yu Lei[1];Zeng, Hui Dan[2];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Dept Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Dept Sch Mat Sci & Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2017

卷号：200

起止页码：578

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20163202691316);WOS:【SCI-EXPANDED(收录号:WOS:000384775600060)】；

基金：This work was financially supported by National Natural Science Foundation of China (21573068), SRF for ROCS, SEM, SRFDP, Program of Shanghai Subject Chief Scientist (15XD1501300), Fundamental Research Funds for the Central Universities (WD1313009 and WD1514303), China Postdoctoral Science Foundation Funded Project (2016M591615) and 111 Project (B14018).

语种：英文

外文关键词：Photocatalysis; Co-catalyst; Hydrogen; Ni@C; Graphene layers

摘要：Metallic nickel nanoparticles well dispersed in graphitized carbon matrix (Ni@C) by pyrolysis of metal organic frameworks and leaching treatment of hydrochloric acid could greatly enhance the photocatalytic activity of g-C3N4 under visible light irradiation. For 2.0 wt% Ni@Cig-C3N4, the average hydrogen evolution rate is 2.15 mmol h(-1) g(-1), which is around 88 times higher than that of pure g-C3N4, and even better than that of platinum-loaded g-C3N4. The remarkably improved photocatalytic activities through loading Ni@C can be attributed to the cooperative work of Ni nanoparticles and graphene layers, which facilitate the separation of photo-generated carriers and suppress the recombination of the electron-hole pairs. In addition, the hollow onion-like structure can restrain the formation of Ni-hydrogen bonds which modulates desorption of hydrogen. Our studies may open up a promising strategy to design economical noble-metal-free co-catalysts for efficient solar energy conversion. (C) 2016 Elsevier B.V. All rights reserved.