TY - JOUR
T1 - Highly active and stable amorphous IrOx/CeO2 nanowires for acidic oxygen evolution
AU - Gou, Wangyan
AU - Xia, Zhaoming
AU - Tan, Xiaohe
AU - Xue, Qingyu
AU - Ye, Fan
AU - Dai, Sheng
AU - Zhang, Mingkai
AU - Si, Rui
AU - Zou, Yong
AU - Ma, Yuanyuan
AU - Ho, Johnny C.
AU - Qu, Yongquan
N1 - Funding Information:
We acknowledge the National Nature Science Foundation of China (21872109). Y. Ma is supported by the National Natural Science Foundation of Shaanxi Province, China (No. 2020JM-039) and Fundamental Research Funds for the Central Universities (No. D5000210601). Y. Qu acknowledges the support from Fundamental Research Funds for the Central Universities (No. D5000210829). Z. Xia is supported by the China Postdoctoral Science Foundation (043260443). W. Gou is supported by the National Natural Science Foundation of Shaanxi Province, China (No. 2022JQ-433). The hard X-ray adsorption experiment (XANES and EXAFS) was performed at BL14W1 beam line in the Shanghai Synchrotron Radiation Facility (SSRF). The calculations were performed by using the HPC Platform at National Supercomputing Center in Tianjin. We thank H2 Cluster of Frontier Institute of Science and Technology, Xi'an Jiaotong University for supporting VASP resources in this study.
Funding Information:
We acknowledge the National Nature Science Foundation of China ( 21872109 ). Y. Ma is supported by the National Natural Science Foundation of Shaanxi Province , China (No. 2020JM-039 ) and Fundamental Research Funds for the Central Universities (No. D5000210601 ). Y. Qu acknowledges the support from Fundamental Research Funds for the Central Universities (No. D5000210829 ). Z. Xia is supported by the China Postdoctoral Science Foundation ( 043260443 ). W. Gou is supported by the National Natural Science Foundation of Shaanxi Province, China (No. 2022JQ-433 ). The hard X-ray adsorption experiment (XANES and EXAFS) was performed at BL14W1 beam line in the Shanghai Synchrotron Radiation Facility (SSRF). The calculations were performed by using the HPC Platform at National Supercomputing Center in Tianjin. We thank H2 Cluster of Frontier Institute of Science and Technology, Xi’an Jiaotong University for supporting VASP resources in this study.
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/12/15
Y1 - 2022/12/15
N2 - Development of highly active and durable electrocatalysts for acidic oxygen evolution reaction (OER) remains an unresolved grand challenge. Here, we reported the amorphous IrOx/CeO2 nanowires as highly active and acid-stable OER catalysts through a facile electro-spinning/calcination approach. The amorphous catalysts delivered a high mass activity of 167 A gIr−1 at 1.51 V, a low overpotential of 220 mV at 10 mA cm−2, and a stable performance for 300 h of continuous operation in acid. As revealed by complementary experimental and theoretical calculation results, the intimate nanoscale feature of IrOx/CeO2 creates abundant binary interfaces, at which CeO2 as an electron buffer regulates the adsorption of oxygen intermediates, lowers the activation barrier of OER, and suppresses the over-oxidation and dissolution of Ir, thereby significantly enhancing the OER activity and stability. This work provides a new strategy for designing highly active and acid-resistant OER catalysts.
AB - Development of highly active and durable electrocatalysts for acidic oxygen evolution reaction (OER) remains an unresolved grand challenge. Here, we reported the amorphous IrOx/CeO2 nanowires as highly active and acid-stable OER catalysts through a facile electro-spinning/calcination approach. The amorphous catalysts delivered a high mass activity of 167 A gIr−1 at 1.51 V, a low overpotential of 220 mV at 10 mA cm−2, and a stable performance for 300 h of continuous operation in acid. As revealed by complementary experimental and theoretical calculation results, the intimate nanoscale feature of IrOx/CeO2 creates abundant binary interfaces, at which CeO2 as an electron buffer regulates the adsorption of oxygen intermediates, lowers the activation barrier of OER, and suppresses the over-oxidation and dissolution of Ir, thereby significantly enhancing the OER activity and stability. This work provides a new strategy for designing highly active and acid-resistant OER catalysts.
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U2 - 10.1016/j.nanoen.2022.107960
DO - 10.1016/j.nanoen.2022.107960
M3 - Article
AN - SCOPUS:85141321193
SN - 2211-2855
VL - 104
JO - Nano Energy
JF - Nano Energy
M1 - 107960
ER -
