TY - JOUR
T1 - Porous Pd/NiFeOx Nanosheets Enhance the pH-Universal Overall Water Splitting
AU - Zhang, Wen
AU - Jiang, Xue
AU - Dong, Zemeng
AU - Wang, Jing
AU - Zhang, Ning
AU - Liu, Jie
AU - Xu, Guang Rui
AU - Wang, Lei
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (51772162, 22005169, and 52072197), Youth Innovation and Technology Foundation of Shandong Higher Education Institutions, China (2019KJC004), Outstanding Youth Foundation of Shandong Province, China (ZR2019JQ14), Taishan Scholar Young Talent Program (tsqn201909114), Natural Science Foundation of Shandong Province (ZR2020QB121), Major Scientific and Technological Innovation Project (2019JZZY020405), and Major Basic Research Program of Natural Science Foundation of Shandong Province under Grant (ZR2020ZD09).
Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021/12/16
Y1 - 2021/12/16
N2 - Modulating the morphology and chemical composition is an efficient strategy to enhance the catalytic activity for water splitting, since it is still a great challenge to develop a bifunctional catalyst for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) over a wide pH range. Herein, Pd/NiFeOx nanosheets are synthesized with tightly arranged petal nanosheets and uniform mesoporous structure on nickel foam (NF). The porous 2D structure yields a larger surface area and exposes more active sites, facilitating water splitting at all pH values. The overpotential of Pd/NiFeOx nanosheets for OER is only 180, 169, and 310 mV in 1 m KOH, 0.5 m H2SO4, and 1 m phosphate-buffered saline (PBS) conditions at 10 mA cm−2 current density, as well as excellent HER activity with ultralow overpotential in a wide pH range. When using porous Pd/NiFeOx nanosheets as bifunctional catalysts for water splitting, it just required a cell voltage of 1.57 V to reach a current density of 20 mA cm−2 with nearly 100% faradic efficiency in alkaline conditions, which is much lower than that of benchmark Pt/CǁRuO2 (1.76 V) couples, along with the improving stability benefiting from the good corrosion resistance of the inner NiFeOx nanosheets.
AB - Modulating the morphology and chemical composition is an efficient strategy to enhance the catalytic activity for water splitting, since it is still a great challenge to develop a bifunctional catalyst for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) over a wide pH range. Herein, Pd/NiFeOx nanosheets are synthesized with tightly arranged petal nanosheets and uniform mesoporous structure on nickel foam (NF). The porous 2D structure yields a larger surface area and exposes more active sites, facilitating water splitting at all pH values. The overpotential of Pd/NiFeOx nanosheets for OER is only 180, 169, and 310 mV in 1 m KOH, 0.5 m H2SO4, and 1 m phosphate-buffered saline (PBS) conditions at 10 mA cm−2 current density, as well as excellent HER activity with ultralow overpotential in a wide pH range. When using porous Pd/NiFeOx nanosheets as bifunctional catalysts for water splitting, it just required a cell voltage of 1.57 V to reach a current density of 20 mA cm−2 with nearly 100% faradic efficiency in alkaline conditions, which is much lower than that of benchmark Pt/CǁRuO2 (1.76 V) couples, along with the improving stability benefiting from the good corrosion resistance of the inner NiFeOx nanosheets.
KW - 2D porous nanosheets, bifunctional electrocatalysts
KW - oxygen evolution reaction
KW - water splitting
KW - wide pH range
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U2 - 10.1002/adfm.202107181
DO - 10.1002/adfm.202107181
M3 - Article
AN - SCOPUS:85116890946
SN - 1616-301X
VL - 31
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 51
M1 - 2107181
ER -