期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 556, 期 -, 页码 24-32出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.08.041
关键词
Molybdenum disulfide; Heterostructure; HER; Synergistic effect
资金
- National Natural Science Foundation of China [11474151, 11774156, 21671117]
- National Key Project for Basic Research [2012CB932304]
- Nature Science Foundation of Jiangsu Higher Education Institution [17KJB140013]
- Nature Science Foundation of Nanjing Xiaozhuang University, People's Republic of China [2016NXY37, 2018NXY20]
A new heterostructure Ni9S8@MoS2 hybrid is studied as a promising candidate nonplatinum electrocatalyst for highly enhanced hydrogen evolution reaction (HER), prepared by an improved two-step hydrothermal method. Under optimized experiment conditions, the as-prepared catalysts exhibit significantly higher electrocatalytic activity than pure MoS2 and Ni9S8 nanosheets. The optimized Ni9S8@MoS2 hybrid shows a small onset overpotential of 88 mV, a Tafel slope as low as 49 mV/clec, and a good durability in acidic solution. Through experimental analysis, the excellent electrocatalytic activity of HER and high stability of the hybrid largely attribute to the electrical coupling between MoS2 and Ni9S8, the massive exposed active edge sites provided by layered transition metal chalcogenides (MoS2), and the electrocatalytic synergistic effects produced by the Ni9S8@MoS2 heterostructure. (C) 2019 Elsevier Inc. All rights reserved.
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