TY - JOUR
T1 - Steam-driven crystalline-amorphous coupling design of homogenous metal hydroxides for oxygen evolution reaction
AU - Gao, Jinqiang
AU - Qiu, Chen
AU - Ju, Min
AU - Li, Simeng
AU - Yu, Rongxing
AU - Liu, Hongzhi
AU - Hu, Mingyu
AU - Yu, Jun
AU - Hong, Mei
AU - Yang, Shihe
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China ( 21972006 ), the Shenzhen Science and Technology Program ( JCYJ20200109140421071 , JSGG20211029095546003 , KCXFZ20201221173604012 ), and Shenzhen Peacock Plan ( KQTD2016053015544057 ).
Publisher Copyright:
© 2022
PY - 2023/4
Y1 - 2023/4
N2 - The crystalline-amorphous (c-a) structure is emerging as a promising design of oxygen evolution electrocatalysts. However, homogenous compositions and excellent stability are hindering further industrial applications. Only by using metal nitrates and methanol solvent, we provide an effective steam-driven strategy to directly fabricate c-a electrocatalysts. The division of methanol molecules establishes an experimental approach to analyze the targeted transformation from crystalline to c-a phase for monometallic nickel hydroxy-nitrates. Following, this design is successfully extended to the bimetallic NiFe layered double hydroxide (NiFe-LDH). The presence of Fe3+ not only effectively promotes electrochemical activity but also enhances adhesion to the nickel foam, conjuring up an ultra-active and ultra-stable NiFeA-S@NF electrocatalyst with an overpotential of 205 mV at 10 mA cm-2 and excellent 200 h stability at 500–1000 mA cm-2. In light of the above findings and preliminary scale-up experiment, this approach offers both fundamental and practical guidelines for other non-noble-metal-based electrocatalysts.
AB - The crystalline-amorphous (c-a) structure is emerging as a promising design of oxygen evolution electrocatalysts. However, homogenous compositions and excellent stability are hindering further industrial applications. Only by using metal nitrates and methanol solvent, we provide an effective steam-driven strategy to directly fabricate c-a electrocatalysts. The division of methanol molecules establishes an experimental approach to analyze the targeted transformation from crystalline to c-a phase for monometallic nickel hydroxy-nitrates. Following, this design is successfully extended to the bimetallic NiFe layered double hydroxide (NiFe-LDH). The presence of Fe3+ not only effectively promotes electrochemical activity but also enhances adhesion to the nickel foam, conjuring up an ultra-active and ultra-stable NiFeA-S@NF electrocatalyst with an overpotential of 205 mV at 10 mA cm-2 and excellent 200 h stability at 500–1000 mA cm-2. In light of the above findings and preliminary scale-up experiment, this approach offers both fundamental and practical guidelines for other non-noble-metal-based electrocatalysts.
KW - Crystalline–amorphous coupling
KW - Electrocatalysis
KW - Methanol steam
KW - Oxygen evolution reaction
KW - Stability
UR - http://www.scopus.com/inward/record.url?scp=85146918864&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2022.122165
DO - 10.1016/j.apcatb.2022.122165
M3 - Journal article
AN - SCOPUS:85146918864
SN - 0926-3373
VL - 323
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 122165
ER -
