TY - JOUR
T1 - Bimetallic Phosphide Heterostructure Coupled with Ultrathin Carbon Layer Boosting Overall Alkaline Water and Seawater Splitting
AU - Li, Jingwen
AU - Hu, Yezhou
AU - Huang, Xiao
AU - Zhu, Ye
AU - Wang, Deli
N1 - Funding Information:
This work was supported by the National Natural Science Foundation (22279036), Open Found of Hubei Key Laboratory of Material Chemistry and Service Failure (2021MCF03), and Fundamental Research Funds for the Central Universities (2020kfyXJJS063). The authors thank the Analytical and Testing Center of Huazhong University of Science & Technology for allowing to use its facilities for XRD, XPS, and SEM measurements. The TEM work was supported by the Hong Kong Polytechnic University grant (No. ZE2F).
Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/2/15
Y1 - 2023/2/15
N2 - Seawater electrolysis is promising for green hydrogen production but hindered by the sluggish reaction kinetics of both cathode and anode, as well as the detrimental chlorine chemistry environment. Herein, a self-supported bimetallic phosphide heterostructure electrode strongly coupled with an ultrathin carbon layer on Fe foam (C@CoP-FeP/FF) is constructed. When used as an electrode for the hydrogen and oxygen evolution reactions (HER/OER) in simulated seawater, the C@CoP-FeP/FF electrode shows overpotentials of 192 mV and 297 mV at 100 mA cm−2, respectively. Moreover, the C@CoP-FeP/FF electrode enables the overall simulated seawater splitting at the cell voltage of 1.73 V to achieve 100 mA cm−2, and operate stably during 100 h. The superior overall water and seawater splitting properties can be ascribed to the integrated architecture of CoP-FeP heterostructure, strongly coupled carbon protective layer, and self-supported porous current collector. The unique composites can not only provide enriched active sites, ensure prominent intrinsic activity, but also accelerate the electron transfer and mass diffusion. This work confirms the feasibility of an integration strategy for the manufacturing of a promising bifunctional electrode for water and seawater splitting.
AB - Seawater electrolysis is promising for green hydrogen production but hindered by the sluggish reaction kinetics of both cathode and anode, as well as the detrimental chlorine chemistry environment. Herein, a self-supported bimetallic phosphide heterostructure electrode strongly coupled with an ultrathin carbon layer on Fe foam (C@CoP-FeP/FF) is constructed. When used as an electrode for the hydrogen and oxygen evolution reactions (HER/OER) in simulated seawater, the C@CoP-FeP/FF electrode shows overpotentials of 192 mV and 297 mV at 100 mA cm−2, respectively. Moreover, the C@CoP-FeP/FF electrode enables the overall simulated seawater splitting at the cell voltage of 1.73 V to achieve 100 mA cm−2, and operate stably during 100 h. The superior overall water and seawater splitting properties can be ascribed to the integrated architecture of CoP-FeP heterostructure, strongly coupled carbon protective layer, and self-supported porous current collector. The unique composites can not only provide enriched active sites, ensure prominent intrinsic activity, but also accelerate the electron transfer and mass diffusion. This work confirms the feasibility of an integration strategy for the manufacturing of a promising bifunctional electrode for water and seawater splitting.
KW - bifunctional electrocatalysts
KW - bimetallic phosphide
KW - chlorine-corrosion resistance
KW - electrocatalysis
KW - overall water splitting
UR - http://www.scopus.com/inward/record.url?scp=85148344885&partnerID=8YFLogxK
U2 - 10.1002/smll.202206533
DO - 10.1002/smll.202206533
M3 - Journal article
C2 - 36793256
AN - SCOPUS:85148344885
SN - 1613-6810
VL - 19
JO - Small
JF - Small
IS - 20
M1 - 2206533
ER -