title: Efficient Electrocatalytic Hydrogen Evolution from MoS2-Functionalized Mo2N Nanostructures.
abstract: Molybdenum-based compounds and their composites were investigated as an alternative to Pt for hydrogen evolution reactions. The presence of interfaces and junctions between Mo2N and MoS2grains in the composites were investigated to understand their role in electrochemical processes. Here we found that the electrocatalytic activity of Mo2N nanostructures was enhanced remarkably by conjugation with few-layer MoS2sheets. The electrocatalytic performance of Mo2N-MoS2composites in the hydrogen evolution reaction (HER) was revealed from the high catalytic current density of ∼175 mA cm-2(at 400 mV) and good electrochemical stability (more than 18 h) in acidic media. Increasing the amount of MoS2in the composite, decreases the HER activity. The mechanism and kinetics of the HER process on the Mo2N-MoS2surface were analyzed using Tafel slopes and charge transfer resistance.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi-110016, India.
authors.forename: Kasinath
authors.identifier: http://orcid.org/0000-0002-3811-8579
authors.initials: K
authors.lastname: Ojha
authors.affiliation: Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi-110016, India.
authors.forename: Soumen
authors.initials: S
authors.lastname: Saha
authors.affiliation: Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi-110016, India.
authors.forename: Shivali
authors.initials: S
authors.lastname: Banerjee
authors.affiliation: Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi-110016, India.|Institute of Nano Science and Technology, Mohali , Mohali, Phase-10, Sector-64, Punjab-160062, India.
authors.forename: Ashok K
authors.identifier: http://orcid.org/0000-0003-4375-6353
authors.initials: AK
authors.lastname: Ganguli
keywords: Mo2N; MoS2; electrocatalysis; hydrogen evolution reactions; nanocomposites