TY - JOUR
T1 - S-Doped MoP Nanoporous Layer Toward High-Efficiency Hydrogen Evolution in pH-Universal Electrolyte
AU - Liang, Kun
AU - Pakhira, Srimanta
AU - Yang, Zhenzhong
AU - Nijamudheen, A.
AU - Ju, Licheng
AU - Wang, Maoyu
AU - Aguirre-Velez, Carlos I.
AU - Sterbinsky, George E.
AU - Du, Yingge
AU - Feng, Zhenxing
AU - Mendoza-Cortes, Jose L.
AU - Yang, Yang
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2019/1/4
Y1 - 2019/1/4
N2 - In this study, we report a nonprecious metal catalyst for high-efficiency hydrogen evolution reaction (HER). A self-organized S-doped MoP nanoporous layer (S-MoP NPL) is achieved through a facile electrochemical anodic process and a two-step chemical vapor deposition treatment, which was directly used as a binder-free catalyst for HER in pH-universal electrolytes. S-MoP NPL exhibits HER behavior with a low overpotential of 86 mV at 10 mA cm -1 and low Tafel slope of 34 mV dec -1 in acidic solution. Moreover, S-MoP NPL also shows high HER activity in basic and neutral electrolytes. Density functional theory (DFT) computations were carried out to support our experiment. The calculations show that the H 2 formation (via Volmer-Heyrovsky mechanism) from the reaction of a metal (Mo) absorbed hydride with a solvated proton is favored over S-MoP than MoS 2 . Both experimental and computational studies demonstrate that the extraordinary HER activity and stability performance displayed by a MoP catalyst can be enhanced by S-doping, opening up a promising paradigm for the conscious design of high-performance nonprecious metal catalyst for hydrogen generation.
AB - In this study, we report a nonprecious metal catalyst for high-efficiency hydrogen evolution reaction (HER). A self-organized S-doped MoP nanoporous layer (S-MoP NPL) is achieved through a facile electrochemical anodic process and a two-step chemical vapor deposition treatment, which was directly used as a binder-free catalyst for HER in pH-universal electrolytes. S-MoP NPL exhibits HER behavior with a low overpotential of 86 mV at 10 mA cm -1 and low Tafel slope of 34 mV dec -1 in acidic solution. Moreover, S-MoP NPL also shows high HER activity in basic and neutral electrolytes. Density functional theory (DFT) computations were carried out to support our experiment. The calculations show that the H 2 formation (via Volmer-Heyrovsky mechanism) from the reaction of a metal (Mo) absorbed hydride with a solvated proton is favored over S-MoP than MoS 2 . Both experimental and computational studies demonstrate that the extraordinary HER activity and stability performance displayed by a MoP catalyst can be enhanced by S-doping, opening up a promising paradigm for the conscious design of high-performance nonprecious metal catalyst for hydrogen generation.
UR - https://www.scopus.com/pages/publications/85059415459
U2 - 10.1021/acscatal.8b04291
DO - 10.1021/acscatal.8b04291
M3 - 文章
AN - SCOPUS:85059415459
SN - 2155-5435
VL - 9
SP - 651
EP - 659
JO - ACS Catalysis
JF - ACS Catalysis
IS - 1
ER -