文献类型：期刊文献

英文题名：Synergistic effects in atomic-layer-deposited PtCox/CNTs catalysts enhancing hydrolytic dehydrogenation of ammonia borane

作者：Zhang, Jiankang[1,2];Chen, Wenyao[3];Ge, Huibin[1,2];Chen, Chaoqiu[1];Yan, Wenjun[1];Gao, Zhe[1];Gan, Jie[3];Zhang, Baiyan[1,2];Duan, Xuezhi[3];Qin, Yong[1]

机构：[1]Chinese Acad Sci, State Key Lab Coal Convers, Inst Coal Chem, Taiyuan 030001, Shanxi, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100039, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2018

卷号：235

起止页码：256

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20181905176816);WOS:【SCI-EXPANDED(收录号:WOS:000438478900026)】；

基金：We acknowledge the financial support from the National Natural Science Foundation of China (21203229 and 21673269), Natural Science Foundation of ShanXi Province (201701D121036) and Youth Innovation Promotion Association of the Chinese Academy of Sciences (2015139). We are grateful to Shanghai Institute of Applied Physics for the X-ray absorption spectroscopy measurement.

语种：英文

外文关键词：Atomic layer deposition; Pt-Co synergy; Ammonia borane; Hydrogen evolution; Kinetic and isotopic analyses

摘要：Highly dispersed and narrowly size-distributed Pt-Co bimetallic nanoparticles supported on CNTs are fabricated by atomic layer deposition (ALD) of Pt followed by COO ALD for hydrolytic dehydrogenation of ammonia borane. The controlled decoration of CoO significantly enhances the hydrogen evolution activity of the Pt-based catalysts due to the remarkable Pt-Co synergy, i.e., the TOF value is up to 675.1 mol(H2)mol(pt)(-1) min(-1) for bimetallic PtCo20/CNTs catalyst, which is 1.8 times higher than that of monometallic Pt/CNTs catalyst. The underlying nature of the Pt-Co synergy is systematically investigated by combining multiple characterizations with kinetic and isotopic analyses. It is revealed that the decoration of CoO onto Pt provides unique Pt-Co interfaces and targeted Pt electronic properties, thereby exhibiting the lower activation energy and favorable O-H bond cleavage being the rate-determining step for the hydrolysis reaction. The insights revealed here provide inspiration and guide for the rational design of other advanced nanocatalysts.