High Activity Hydrogen Evolution Catalysis by Uniquely Designed Amorphous/Metal Interface of Core–shell Phosphosulfide/N‐Doped CNTs. Issue 13 (22nd January 2018)

• Record Type: Journal Article
• Authors: Li, Dong Jun; Kang, Joonhee; Lee, Ho Jin; Choi, Dong Sung; Koo, Sung Hwan; Han, Byungchan; Kim, Sang Ouk
• Is Part Of: Advanced energy materials. Volume 8:Issue 13(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-01-22
• Subjects: carbon nanotubes -- catalysts -- doping -- hydrogen evolution -- interfaces -- metal phosphosulfide; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201702806
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: A cost effective hydrogen evolution reaction (HER) catalyst that does not use precious metallic elements is a crucial demand for environment‐benign energy production. The family of earth‐abundant transition metal compounds of nitrides, carbides, chalcogenides, and phosphides is one of the promising candidates for such a purpose, particularly in acidic conditions. However, its catalytic performance is still needed to be enhanced through novel material designs and crystalline engineering. Herein, a chemically and electronically coupled transition metal phosphosulfide/N‐doped carbon nanotubes (NCNT) hybrid electrocatalyst is fabricated via a two‐step synthesis. The uniquely designed synthesis leads to the material morphology featuring a core–shell structure, in which the crystalline metal phosphide core is surrounded by an amorphous phosphosulfide nanoshell. Notably, due to the favorable modification of chemical composition and surface properties, core–shell CoP@PS/NCNT exhibits the noticeable HER activity of approximately −80 mV @ −10 mA cm −2 with excellent durability, which is one of the highest active nonnoble metal electrocatalysts ever reported thus far. Abstract : A chemically and electronically coupled transition metal phosphosulfide/N‐doped carbon nanotubes (NCNT) hybrid electrocatalyst is fabricated via a two‐step synthesis. The uniquely designed synthesis leads to the material morphology featuring a core–shell structure, where the crystalline metal phosphide core is surrounded by an amorphous phosphosulfide nanoshell. Notably, due to the favorable modification of the chemical composition and surface properties, core–shell CoP@PS/NCNT exhibits remarkable hydrogen evolution reaction activity.