TY - JOUR
T1 - Immobilizing Ordered Oxophilic Indium Sites on Platinum Enabling Efficient Hydrogen Oxidation in Alkaline Electrolyte
AU - Wu, Jie
AU - Gao, Xin
AU - Liu, Guimei
AU - Qiu, Xiaoyi
AU - Xia, Qing
AU - Wang, Xinzhong
AU - Zhu, Wenxiang
AU - He, Tiwei
AU - Zhou, Yunjie
AU - Feng, Kun
AU - Wang, Jiaxuan
AU - Huang, Hui
AU - Liu, Yang
AU - Shao, Minhua
AU - Kang, Zhenhui
AU - Zhang, Xiao
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2024/7/24
Y1 - 2024/7/24
N2 - Addressing the sluggish kinetics in the alkaline hydrogen oxidation reaction (HOR) is a pivotal yet challenging step toward the commercialization of anion-exchange membrane fuel cells (AEMFCs). Here, we have successfully immobilized indium (In) atoms in an orderly fashion into platinum (Pt) nanoparticles supported by reduced graphene oxide (denoted as O-Pt3In/rGO), significantly enhancing alkaline HOR kinetics. We have revealed that the ordered atomic matrix enables uniform and optimized hydrogen binding energy (HBE), hydroxyl binding energy (OHBE), and carbon monoxide binding energy (COBE) across the catalyst. With a mass activity of 2.3066 A mg-1 at an overpotential of 50 mV, over 10 times greater than that of Pt/C, the catalyst also demonstrates admirable CO resistance and stability. Importantly, the AEMFC implementing this catalyst as the anode catalyst has achieved an impressive power output compared to Pt/C. This work not only highlights the significance of constructing ordered oxophilic sites for alkaline HOR but also sheds light on the design of well-structured catalysts for energy conversion.
AB - Addressing the sluggish kinetics in the alkaline hydrogen oxidation reaction (HOR) is a pivotal yet challenging step toward the commercialization of anion-exchange membrane fuel cells (AEMFCs). Here, we have successfully immobilized indium (In) atoms in an orderly fashion into platinum (Pt) nanoparticles supported by reduced graphene oxide (denoted as O-Pt3In/rGO), significantly enhancing alkaline HOR kinetics. We have revealed that the ordered atomic matrix enables uniform and optimized hydrogen binding energy (HBE), hydroxyl binding energy (OHBE), and carbon monoxide binding energy (COBE) across the catalyst. With a mass activity of 2.3066 A mg-1 at an overpotential of 50 mV, over 10 times greater than that of Pt/C, the catalyst also demonstrates admirable CO resistance and stability. Importantly, the AEMFC implementing this catalyst as the anode catalyst has achieved an impressive power output compared to Pt/C. This work not only highlights the significance of constructing ordered oxophilic sites for alkaline HOR but also sheds light on the design of well-structured catalysts for energy conversion.
UR - http://www.scopus.com/inward/record.url?scp=85199761150&partnerID=8YFLogxK
U2 - 10.1021/jacs.4c05844
DO - 10.1021/jacs.4c05844
M3 - Journal article
C2 - 38995375
AN - SCOPUS:85199761150
SN - 0002-7863
VL - 146
SP - 20323
EP - 20332
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 29
ER -