TY - JOUR
T1 - Enabling efficient hydrogen-evolution reaction over perovskite oxide electrocatalysts through phosphorus promotion
AU - Zhang, Zhenbao
AU - Zhou, Wulan
AU - Yang, Ziwei
AU - Jiang, Jiahui
AU - Chen, Dengjie
AU - Shao, Zongping
N1 - Publisher Copyright:
© 2020 Hydrogen Energy Publications LLC
PY - 2020/9/21
Y1 - 2020/9/21
N2 - In this work, we have demonstrated that by modifying Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) via phosphorous (P) incorporation, the hydrogen evolution reaction (HER) activity was boosted. Such P incorporation was realized through the lattice doping via an in situ method, or bulk/surface co-modification via an ex situ approach. Under optimal conditions, the derived P-doped and bulk/surface-modified BSCF exhibited η0 of ~205 and ~159 mV, and η10 of ~333 and ~309 mV in 1.0 M KOH, respectively. Such attractive performance resulted from multiple aspects, including the improved electrochemical active surface area, accelerated charge transfer kinetics, increased high-oxidation state of the Co cation within the Co3+/Co4+ redox couple, and enlarged amount of lattice oxygen species. Moreover, the presence of amorphous regions and structure distortion of P-modified BSCF from the ex situ method greatly facilitated the HER.
AB - In this work, we have demonstrated that by modifying Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) via phosphorous (P) incorporation, the hydrogen evolution reaction (HER) activity was boosted. Such P incorporation was realized through the lattice doping via an in situ method, or bulk/surface co-modification via an ex situ approach. Under optimal conditions, the derived P-doped and bulk/surface-modified BSCF exhibited η0 of ~205 and ~159 mV, and η10 of ~333 and ~309 mV in 1.0 M KOH, respectively. Such attractive performance resulted from multiple aspects, including the improved electrochemical active surface area, accelerated charge transfer kinetics, increased high-oxidation state of the Co cation within the Co3+/Co4+ redox couple, and enlarged amount of lattice oxygen species. Moreover, the presence of amorphous regions and structure distortion of P-modified BSCF from the ex situ method greatly facilitated the HER.
KW - BaSrCoFeO
KW - Hydrogen evolution reaction
KW - Perovskite oxide
KW - Phosphorus modification
UR - http://www.scopus.com/inward/record.url?scp=85088556413&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2020.06.298
DO - 10.1016/j.ijhydene.2020.06.298
M3 - 文章
AN - SCOPUS:85088556413
SN - 0360-3199
VL - 45
SP - 24859
EP - 24869
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 46
ER -
