TY - JOUR
T1 - Templated-preparation of a three-dimensional molybdenum phosphide sponge as a high performance electrode for hydrogen evolution
AU - Deng, Chen
AU - Ding, Fei
AU - Li, Xinyuan
AU - Guo, Yaofang
AU - Ni, Wei
AU - Yan, Huan
AU - Sun, Kening
AU - Yan, Yi Ming
N1 - Publisher Copyright:
© 2016 The Royal Society of Chemistry.
PY - 2015
Y1 - 2015
N2 - Electrocatalysts play a vital role in electrochemical water-splitting for hydrogen production. Here, we report the preparation of three-dimensional molybdenum phosphide (MoP) as a non-precious-metal electrocatalyst for the hydrogen evolution reaction (HER) by using cheap sponge (polyurethane, PU) as a sacrificial template. The obtained 3D MoP not only has large surface area, but also possesses a porous and channel-rich structure, in which the side walls of the pores are composed of refined nanoparticles. The 3D MoP sponge was used as a bulky and binder-free HER electrode and exhibited excellent catalytic activity in an acidic electrolyte (achieving 10 and 20 mA cm-2 at an overpotential of 105 and 155 mV, respectively). In addition, this novel bulky HER electrode showed a relatively small Tafel slope of 126 mV dec-1, a high exchange current density of 3.052 mA cm-2, and a faradaic efficiency of nearly 100%. Furthermore, this bulky electrode revealed high tolerance and durability both under acidic and basic conditions, maintaining 96% and 93% of its initial catalytic activity after continuous testing for 60000 s. Thus, our work paves a feasible way of fabricating a cheap and highly efficient HER electrode on a large-scale for electrochemical water-splitting technology.
AB - Electrocatalysts play a vital role in electrochemical water-splitting for hydrogen production. Here, we report the preparation of three-dimensional molybdenum phosphide (MoP) as a non-precious-metal electrocatalyst for the hydrogen evolution reaction (HER) by using cheap sponge (polyurethane, PU) as a sacrificial template. The obtained 3D MoP not only has large surface area, but also possesses a porous and channel-rich structure, in which the side walls of the pores are composed of refined nanoparticles. The 3D MoP sponge was used as a bulky and binder-free HER electrode and exhibited excellent catalytic activity in an acidic electrolyte (achieving 10 and 20 mA cm-2 at an overpotential of 105 and 155 mV, respectively). In addition, this novel bulky HER electrode showed a relatively small Tafel slope of 126 mV dec-1, a high exchange current density of 3.052 mA cm-2, and a faradaic efficiency of nearly 100%. Furthermore, this bulky electrode revealed high tolerance and durability both under acidic and basic conditions, maintaining 96% and 93% of its initial catalytic activity after continuous testing for 60000 s. Thus, our work paves a feasible way of fabricating a cheap and highly efficient HER electrode on a large-scale for electrochemical water-splitting technology.
UR - http://www.scopus.com/inward/record.url?scp=84950323861&partnerID=8YFLogxK
U2 - 10.1039/c5ta05453b
DO - 10.1039/c5ta05453b
M3 - Article
AN - SCOPUS:84950323861
SN - 2050-7488
VL - 4
SP - 59
EP - 66
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 1
ER -