TY - JOUR
T1 - Crafting MoC2-doped bimetallic alloy nanoparticles encapsulated within N-doped graphene as roust bifunctional electrocatalysts for overall water splitting
AU - Hu, Qi
AU - Liu, Xiufang
AU - Zhu, Bin
AU - Fan, Liangdong
AU - Chai, Xiaoyan
AU - Zhang, Qianling
AU - Liu, Jianhong
AU - He, Chuanxin
AU - Lin, Zhiqun
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/8
Y1 - 2018/8
N2 - Despite recent vigorous progress in synthesis of monofunctional electrocatalysts for hydrogen evolution reaction (HER) or oxygen evolution reaction (OER), it remains challenging to develop bifunctional electrocatalysts for efficient overall water splitting. Herein, we report the crafting of MoC2-doped NiFe alloy nanoparticles (NPs) encapsulated within a-few-layer-thick N-doped graphene (denoted NG-NiFe@MoC2) via one-step calcination of hybrid precursors containing polymer-encapsulating binary Prussian blue analogues NPs and Mo6+ cations. The resulting NG-NiFe@MoC2 nanohybrids were exploited as electrocatalysts and exhibited excellent performance on either HER or OER separately as a direct consequence of the synergistic effects of unique compositions (i.e., MoC2 dopants and NiFe alloy NPs; both exerted profound influence on HER and OER) and advantageous architecture (i.e., a-few-layer-thick N-doped graphene encapsulating shell). Remarkably, an alkaline electrolyte capitalizing on NG-NiFe@MoC2 nanohybrids as bifunctional electrocatalysts achieved overall water-splitting (i.e., concurrent HER and OER) current density of 10 mA cm−2 at a low potential of 1.53 V over a period of 10-h operation, outperforming the precious Pt/C//RuO2 counterpart.
AB - Despite recent vigorous progress in synthesis of monofunctional electrocatalysts for hydrogen evolution reaction (HER) or oxygen evolution reaction (OER), it remains challenging to develop bifunctional electrocatalysts for efficient overall water splitting. Herein, we report the crafting of MoC2-doped NiFe alloy nanoparticles (NPs) encapsulated within a-few-layer-thick N-doped graphene (denoted NG-NiFe@MoC2) via one-step calcination of hybrid precursors containing polymer-encapsulating binary Prussian blue analogues NPs and Mo6+ cations. The resulting NG-NiFe@MoC2 nanohybrids were exploited as electrocatalysts and exhibited excellent performance on either HER or OER separately as a direct consequence of the synergistic effects of unique compositions (i.e., MoC2 dopants and NiFe alloy NPs; both exerted profound influence on HER and OER) and advantageous architecture (i.e., a-few-layer-thick N-doped graphene encapsulating shell). Remarkably, an alkaline electrolyte capitalizing on NG-NiFe@MoC2 nanohybrids as bifunctional electrocatalysts achieved overall water-splitting (i.e., concurrent HER and OER) current density of 10 mA cm−2 at a low potential of 1.53 V over a period of 10-h operation, outperforming the precious Pt/C//RuO2 counterpart.
KW - Hydrogen evolution reaction
KW - N-doped graphene
KW - Non-precious transition metal
KW - Oxygen evolution reaction
KW - Prussian blue analogues
UR - http://www.scopus.com/inward/record.url?scp=85047273201&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2018.05.033
DO - 10.1016/j.nanoen.2018.05.033
M3 - Article
AN - SCOPUS:85047273201
SN - 2211-2855
VL - 50
SP - 212
EP - 219
JO - Nano Energy
JF - Nano Energy
ER -