TY - JOUR
T1 - CoP nanosheet assembly grown on carbon cloth: A highly efficient electrocatalyst for hydrogen generation
AU - Yang, Xiulin
AU - Lu, Ang-Yu
AU - Zhu, Yihan
AU - Hedhili, Mohamed N.
AU - Min, Shixiong
AU - Huang, Kuo-Wei
AU - Han, Yu
AU - Li, Lain-Jong
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2015/7
Y1 - 2015/7
N2 - There exists a strong demand to replace expensive noble metal catalysts with cheap metal sulfides or phosphides for hydrogen evolution reaction (HER). Recently metal phosphides such as NixP, FeP and CoP have been considered as promising candidates to replace Pt cathodes. Here we report that the nanocrystalline CoP nanosheet assembly on carbon cloth can be formed by a two-step process: electrochemical deposition of Co species followed by gas phase phosphidation. The CoP catalyst in this report exhibits a Tafel slope of 30.1mV/dec in 0.5M H2SO4 and 42.6mV/dec in 1M KOH. The high HER performance of our CoP catalysts is attributed to the rugae-like morphology which results in a high double-layer capacitance and high density of active sites, estimated as 7.77×1017sites/cm2. © 2015 Elsevier Ltd.
AB - There exists a strong demand to replace expensive noble metal catalysts with cheap metal sulfides or phosphides for hydrogen evolution reaction (HER). Recently metal phosphides such as NixP, FeP and CoP have been considered as promising candidates to replace Pt cathodes. Here we report that the nanocrystalline CoP nanosheet assembly on carbon cloth can be formed by a two-step process: electrochemical deposition of Co species followed by gas phase phosphidation. The CoP catalyst in this report exhibits a Tafel slope of 30.1mV/dec in 0.5M H2SO4 and 42.6mV/dec in 1M KOH. The high HER performance of our CoP catalysts is attributed to the rugae-like morphology which results in a high double-layer capacitance and high density of active sites, estimated as 7.77×1017sites/cm2. © 2015 Elsevier Ltd.
UR - http://hdl.handle.net/10754/564191
UR - https://linkinghub.elsevier.com/retrieve/pii/S2211285515002426
UR - http://www.scopus.com/inward/record.url?scp=84930944362&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2015.05.026
DO - 10.1016/j.nanoen.2015.05.026
M3 - Article
SN - 2211-2855
VL - 15
SP - 634
EP - 641
JO - Nano Energy
JF - Nano Energy
ER -
