TY - JOUR
T1 - Designing Highly Efficient and Long-Term Durable Electrocatalyst for Oxygen Evolution by Coupling B and P into Amorphous Porous NiFe-Based Material
AU - Hu, Fei
AU - Wang, Haiyun
AU - Zhang, Yan
AU - Shen, Xiaochen
AU - Zhang, Guanghui
AU - Pan, Yanbo
AU - Miller, Jeffrey T.
AU - Wang, Kun
AU - Zhu, Shengli
AU - Yang, Xianjin
AU - Wang, Chengming
AU - Wu, Xiaojun
AU - Xiong, Yujie
AU - Peng, Zhenmeng
N1 - Funding Information:
F.H. and H.W. contributed equally to this work. The authors acknowledge financial support from the University of Akron and NSF (Grant No. CHE-1665265). C.W. and Y.X. were supported by the NSFC (Grant No. 21725102 and 21573212). F.H was supported by the NSFC (Grant No. 21802103). X W. was supported by the MOST (Grant No. 2016YFA0200602 and 2018 YFA0208603), the NSFC (Grant No. 21573204), and the Anhui Initiative in Quantum Information technologies.
Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/7/12
Y1 - 2019/7/12
N2 - Oxygen evolution reaction (OER) is of great significance for hydrogen production via water electrolysis, which, however, demands development of highly active, durable, and cost-effective electrocatalysts in order to stride into a renewable energy era. Herein, highly efficient and long-term durable OER by coupling B and P into an amorphous porous NiFe-based electrocatalyst is reported, which possesses an amorphous porous metallic bulk structure and high corrosion resistance, and overcomes the issues associated with currently used catalyst nanomaterials. The PB codoping in the activated NiFePB (a-NiFePB) delocalizes both Fe and Ni at Fermi energy level and enhances p–d hybridization as simulated by density functional theory calculations. The harmonized electronic structure and unique porous framework of the a-NiFePB consequently improve the OER activity. The activated NiFePB thus exhibits an extraordinarily low overpotential of 197 mV for harvesting 10 mA cm−2 OER current density and 233 mV for reaching 100 mA cm−2 under chronopotentiometry condition, with the Tafel slope harmoniously conforming to 34 mV dec−1. Impressive long-term stability of this new catalyst is evidenced by only limited activity decay after 1400 h operation at 100 mA cm−2. This work strategically directs a way for heading up a promising energy conversion alternative.
AB - Oxygen evolution reaction (OER) is of great significance for hydrogen production via water electrolysis, which, however, demands development of highly active, durable, and cost-effective electrocatalysts in order to stride into a renewable energy era. Herein, highly efficient and long-term durable OER by coupling B and P into an amorphous porous NiFe-based electrocatalyst is reported, which possesses an amorphous porous metallic bulk structure and high corrosion resistance, and overcomes the issues associated with currently used catalyst nanomaterials. The PB codoping in the activated NiFePB (a-NiFePB) delocalizes both Fe and Ni at Fermi energy level and enhances p–d hybridization as simulated by density functional theory calculations. The harmonized electronic structure and unique porous framework of the a-NiFePB consequently improve the OER activity. The activated NiFePB thus exhibits an extraordinarily low overpotential of 197 mV for harvesting 10 mA cm−2 OER current density and 233 mV for reaching 100 mA cm−2 under chronopotentiometry condition, with the Tafel slope harmoniously conforming to 34 mV dec−1. Impressive long-term stability of this new catalyst is evidenced by only limited activity decay after 1400 h operation at 100 mA cm−2. This work strategically directs a way for heading up a promising energy conversion alternative.
KW - electrocatalysis
KW - nickel–iron catalysts
KW - oxygen evolution reaction
KW - porous materials
KW - water splitting
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U2 - 10.1002/smll.201901020
DO - 10.1002/smll.201901020
M3 - Article
C2 - 31148404
AN - SCOPUS:85066479837
VL - 15
JO - Small
JF - Small
SN - 1613-6810
IS - 28
M1 - 1901020
ER -