English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Two-dimensional transition metal-dichalcogenides are emerging as efficientand cost-effective electrocatalysts for hydrogen evolution reaction (HER).However, only the edge sites of their trigonal prismatic phase showHER-electrocatalytic properties, while the basal plane, which is absent ofdefective/unsaturated sites, is inactive. Here, we tackle the key challengethat is increasing the number of electrocatalytic sites by designing andengineering heterostructures composed of single-/few-layer MoSe2 flakes andcarbon nanomaterials (graphene or single-wall carbon nanotubes (SWNTs))produced by solution processing. The electrochemical coupling between thematerials that comprise the heterostructure effectively enhances theHER-electrocatalytic activity of the native MoSe2 flakes. The optimization ofthe mass loading of MoSe2 flakes and their electrode assembly via monolithicheterostructure stacking provided a cathodic current density of 10mAcm-2 atoverpotential of 100mV, a Tafel slope of 63mVdec-1 and an exchange currentdensity (j0) of 0.203 Acm-2. In addition, electrode thermal annealing in ahydrogen environment and chemical bathing in n-butyllithium are exploited totexturize the basal planes of the MoSe2 flakes (through Se-vacancies creation)and to achieve in situ semiconducting-to-metallic phase conversion,respectively, thus they activate new HER-electrocatalytic sites. Theas-engineered electrodes show a 4.8-fold enhancement of j0 and a decrease inthe Tafel slope to 54mVdec-1.

Engineered MoSe2-based heterostructures for efficient electrochemical hydrogen evolution reaction