TY - JOUR
T1 - Optimized MoP with Pseudo-Single-Atom Tungsten for Efficient Hydrogen Electrocatalysis
AU - Chen, Changli
AU - Luo, Wenjia
AU - Li, Haijing
AU - Hu, Tao
AU - Zhao, Yizhou
AU - Zhao, Zipeng
AU - Sun, Xiaolong
AU - Zai, Huachao
AU - Qi, Yifei
AU - Wu, Menghao
AU - Dong, Yuanyuan
AU - Dong, Juncai
AU - Chen, Wenxing
AU - Ke, Xiaoxing
AU - Sui, Manling
AU - Zhang, Liqiang
AU - Chen, Qi
AU - Wang, Ziyu
AU - Zhu, Enbo
AU - Li, Yujing
AU - Huang, Yu
N1 - Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/5/25
Y1 - 2021/5/25
N2 - The electrochemical hydrogen evolution reaction (HER) in alkaline medium is of great significance for the conversion of renewable energy into hydrogen fuel. Most catalysts exhibit limited HER performance in alkaline electrolytes due to the inefficient dissociation of water to initiate the Volmer reaction. Herein, we report the atomically dispersed tungsten (W)-optimized MoP nanoparticles on N,P-doped graphene oxide (W0.25Mo0.75P/PNC) that possesses high activity with impressively low overpotentials (η = 70 mV@10 mA cm-2, η = 49 mV@10 mA mgcat.-1) in alkaline medium. The catalyst features with the atomically isolated W atoms that can optimize the surface electronic structure by occupying the vacant Mo sites in the MoP lattice, corroborated by the X-ray absorption spectra, further leading to moderate hydrogen adsorption energy on the surface. The first-principles computation reveals that the atomically dispersed W atoms effectively reduce the water dissociation energy and facilitate the adsorption kinetics, leading to high activity. This work proposes an elegant design principle based on the pseudo-single-atom strategy to facilitate hydrogen electrocatalysis.
AB - The electrochemical hydrogen evolution reaction (HER) in alkaline medium is of great significance for the conversion of renewable energy into hydrogen fuel. Most catalysts exhibit limited HER performance in alkaline electrolytes due to the inefficient dissociation of water to initiate the Volmer reaction. Herein, we report the atomically dispersed tungsten (W)-optimized MoP nanoparticles on N,P-doped graphene oxide (W0.25Mo0.75P/PNC) that possesses high activity with impressively low overpotentials (η = 70 mV@10 mA cm-2, η = 49 mV@10 mA mgcat.-1) in alkaline medium. The catalyst features with the atomically isolated W atoms that can optimize the surface electronic structure by occupying the vacant Mo sites in the MoP lattice, corroborated by the X-ray absorption spectra, further leading to moderate hydrogen adsorption energy on the surface. The first-principles computation reveals that the atomically dispersed W atoms effectively reduce the water dissociation energy and facilitate the adsorption kinetics, leading to high activity. This work proposes an elegant design principle based on the pseudo-single-atom strategy to facilitate hydrogen electrocatalysis.
UR - http://www.scopus.com/inward/record.url?scp=85106429668&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.1c00465
DO - 10.1021/acs.chemmater.1c00465
M3 - Article
AN - SCOPUS:85106429668
SN - 0897-4756
VL - 33
SP - 3639
EP - 3649
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 10
ER -