TY - JOUR
T1 - Interface Engineering of a 2D-C3N4/NiFe-LDH Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution
AU - Yan, Jia
AU - Zhang, Xiandi
AU - Zheng, Weiran
AU - Lee, Lawrence Yoon Suk
N1 - Funding Information:
We gratefully acknowledge the financial supports from the Innovation and Technology Commission of Hong Kong and The Hong Kong Polytechnic University (1-BE0Y). J.Y. acknowledges the Postdoctoral Fellowships Scheme from the Hong Kong Polytechnic University (1-YW3J) and Natural Science Foundation of Jiangsu Province (BK20180887).
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/6/2
Y1 - 2021/6/2
N2 - Photocatalytic water splitting offers an economic and sustainable pathway for producing hydrogen as a zero-emission fuel, but it still suffers from low efficiencies limited by visible-light absorption capacity and charge separation kinetics. Herein, we report an interface-engineered 2D-C3N4/NiFe layered double hydroxide (CN/LDH) heterostructure that shows highly enhanced photocatalytic hydrogen evolution reaction (HER) rate with excellent long-term stability. The morphology and band gap structure of NiFe-LDH are precisely regulated by employing NH4F as a structure-directing agent, which enables a fine interfacial tuning via coupling with 2D-C3N4. The formation of a type II interface in CN/LDH enlarges the active surface area and promotes the charge separation efficiency, leading to an HER rate of 3087 μmol g-1 h-1, which is 14 times higher than that of 2D-C3N4. This study highlights a rational interface engineering strategy for the formation of a heterostructure with a proper hole transport co-catalyst for designing effective water-splitting photocatalysts.
AB - Photocatalytic water splitting offers an economic and sustainable pathway for producing hydrogen as a zero-emission fuel, but it still suffers from low efficiencies limited by visible-light absorption capacity and charge separation kinetics. Herein, we report an interface-engineered 2D-C3N4/NiFe layered double hydroxide (CN/LDH) heterostructure that shows highly enhanced photocatalytic hydrogen evolution reaction (HER) rate with excellent long-term stability. The morphology and band gap structure of NiFe-LDH are precisely regulated by employing NH4F as a structure-directing agent, which enables a fine interfacial tuning via coupling with 2D-C3N4. The formation of a type II interface in CN/LDH enlarges the active surface area and promotes the charge separation efficiency, leading to an HER rate of 3087 μmol g-1 h-1, which is 14 times higher than that of 2D-C3N4. This study highlights a rational interface engineering strategy for the formation of a heterostructure with a proper hole transport co-catalyst for designing effective water-splitting photocatalysts.
KW - carbon nitride
KW - hydrogen evolution reaction
KW - interface engineering
KW - layered double hydroxide
KW - photocatalysis
UR - http://www.scopus.com/inward/record.url?scp=85107710553&partnerID=8YFLogxK
U2 - 10.1021/acsami.1c03240
DO - 10.1021/acsami.1c03240
M3 - Journal article
C2 - 34009942
AN - SCOPUS:85107710553
SN - 1944-8244
VL - 13
SP - 24723
EP - 24733
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 21
ER -
