文献类型：期刊文献

英文题名：Facile preparation and highly efficient photocatalytic hydrogen evolution of novel CuxNiy nanoalloy/graphene nanohybrids

作者：Li, Xiangqing[1];Xu, Honglei[1];Luo, Qiang[1];Kang, Shizhao[1];Qin, Lixia[1];Li, Guodong[3];Yang, Jinghui[2]

机构：[1]Shanghai Inst Technol, Ctr Graphene Res, Sch Chem & Environm Engn, 100 Haiquan Rd, Shanghai 201418, Peoples R China;[2]East China Univ Sci & Technol, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China

年份：2017

卷号：1

期号：3

起止页码：548

外文期刊名：SUSTAINABLE ENERGY & FUELS

收录：;EI(收录号：20184205950650);WOS:【SCI-EXPANDED(收录号:WOS:000422773700015)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 21301118, No. 21305092 and No. 21371070), and Innovation Program of Shanghai Municipal Education Commission (No. 15ZZ096).

语种：英文

外文关键词：Nickel - Catalyst activity - Copper - Copper alloys - Morphology - Nanostructured materials - Precious metals - High resolution transmission electron microscopy - Hydrogen production - X ray diffraction - X ray photoelectron spectroscopy - Binary alloys - Molar ratio - Photocatalytic activity

摘要：Graphene nanohybrids loaded with CuxNiy bimetallic nanoalloys (CuxNiy/G) were obtained via a facile coreduction process. The composition and structure of the CuxNiy/G were characterized by X-ray diffraction, high resolution transmission electron microscopy and X-ray photoelectron spectroscopy. The results showed that, besides composition, the size and morphology of CuxNiy particles on the graphene were different from those of Cu particles or Ni particles on graphene by the same preparation process. Furthermore, with eosin Y and rose bengal (ER) as co-sensitizers, and the CuxNiy bimetallic nanoalloy as the co-catalyst, the photocatalytic activity of hydrogen evolution over the CuxNiy/G increased and reached 5.05 mmol g(-1) h(-1) when the molar ratio of Cu2+ to Ni2+ was 1 : 3. Compared with that of pure graphene (G), its activity was enhanced by up to 8.2 times. It was also higher than those of Cu or Ni loaded G, and even comparable to that of Pt loaded graphene under the same conditions. The higher activity of the CuxNiy/G could be attributed to the small size effect and special morphology of the CuxNiy alloy, fast interfacial electron transfer and synergic interaction in the CuxNiy/G system. Therefore, the CuxNiy bimetallic nanoalloy could act as a cheap and highly efficient noble metal-free cocatalyst for enhancing photocatalytic activity for hydrogen production over graphene-based photocatalysts.