Morphological and reactive optimization of g-C₃N₄-derived Co,N-codoped carbon nanotubes for hydrogen evolution reaction

Abstract

Most of cobalt-doped carbon-based electrocatalysts have good activity for the hydrogen evolution reaction (HER). However, the bond form of cobalt atoms often restricts the improvement of the activity and stability...

Hollow Co nanoparticle/carbon nanotube composite foam for efficient electrocatalytic hydrogen evolution

“…Due to its special morphology and optimal Co addition content, Co/NCNT-25 displays better HER activity than other materials. [35][36][37][38][39][40][41][42][43][44][45][46][47] Co/ NCNT-25 demonstrated exceptional electrocatalytic HER performance, achieving 10 mA cm À2 at low overpotential with just 20 mV in 1 M KOH. 48,49 As shown in Fig.…”

Hydrogen evolution boosted by moderate Co3ZnC with current densities beyond 1000 mA cm−2

“…Among various modifications, hybridization with N-doped carbons (NCs) to achieve Co–N–C type catalysts is an effective protocol. The Co–N–C type catalysts have some of the following advantages: (i) a wide variety of active Co species are candidates, such as metallic Co, 6 Co oxides, 7 Co single atoms, 8 etc . ; (ii) active Co species can be evenly dispersed and/or exposed by NCs; 9 (iii) NCs also have more or less HER activity; 10 (iv) synergistic effects between active Co species and NCs can also boost HER activity.…”