Adaptive Active Site Turning for Superior OER and UOR on Ir‐Ni<sub>3</sub>N Catalyst

Abstract Renewable energy‐based electrocatalytic oxidation for hydrogen production in complex reaction environments such as industrial wastewater and human urine demands high‐performing catalysts to conduct switchable urea oxidation reactions (UOR) and traditional oxygen evolution reactions (OER). Here, a novel bifunctional nanosheet electrocatalyst is reported, Ir‐Ni 3 N, which exhibits excellent electrocatalytic activity for both OER and UOR under alkaline conditions. Specifically, the overpotentials at 100 mA cm −2 for OER and UOR are 1.59 and 1.37 V vs. reversible hydrogen electrode (RHE) respectively, which are superior to most of the recently reported nickel‐based catalysts. Accordingly, a comprehensive mechanism for competitive catalytic activities of Ni and Ir sites in Ir‐Ni 3 N and the switch between OER and UOR that guarantees consistent hydrogen production is proposed. This study provides a feasible strategy for continuous hydrogen production aided by reagent‐adaptive electrocatalysts in urea‐containing wastewater.

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Publication Details

Journal
Advanced Functional Materials
Published
2024-09-30
DOI
https://doi.org/10.1002/adfm.202413474
Citations
41
Primary Topic
Electrocatalysts for Energy Conversion
Type
article
Field-Weighted Citation Impact
4.20

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article

Adaptive Active Site Turning for Superior OER and UOR on Ir‐Ni3N Catalyst

Rui Tong, Mingpeng Chen, Jun Meng, Xiaosai Hu et al.
41 citations
Advanced Functional Materials
Electrocatalysts for Energy Conversion
4.20
article

Adaptive Active Site Turning for Superior OER and UOR on Ir‐Ni3N Catalyst

Rui Tong, Mingpeng Chen, Jun Meng, Xiaosai Hu, Lulu Qiao, Qingju Liu, Youchao Kong, Hui Pan, Siliu Lyu, Di Liu, Yixin Chen, Miao Xu
article en
41 citations

Abstract

Abstract Renewable energy‐based electrocatalytic oxidation for hydrogen production in complex reaction environments such as industrial wastewater and human urine demands high‐performing catalysts to conduct switchable urea oxidation reactions (UOR) and traditional oxygen evolution reactions (OER). Here, a novel bifunctional nanosheet electrocatalyst is reported, Ir‐Ni 3 N, which exhibits excellent electrocatalytic activity for both OER and UOR under alkaline conditions. Specifically, the overpotentials at 100 mA cm −2 for OER and UOR are 1.59 and 1.37 V vs. reversible hydrogen electrode (RHE) respectively, which are superior to most of the recently reported nickel‐based catalysts. Accordingly, a comprehensive mechanism for competitive catalytic activities of Ni and Ir sites in Ir‐Ni 3 N and the switch between OER and UOR that guarantees consistent hydrogen production is proposed. This study provides a feasible strategy for continuous hydrogen production aided by reagent‐adaptive electrocatalysts in urea‐containing wastewater.

Advanced Functional MaterialsVol. 35(3)
Yunnan University (CN), University of Macau (MO), Hubei University of Automotive Technology (CN), Yancheng Teachers University (CN), Yancheng Institute of Technology (CN)
Hubei University of Automotive Technology, Universidade de Macau, Fundo para o Desenvolvimento das Ciências e da Tecnologia
Clean water and sanitation
Openalex Percentile: Top 5%
Electrocatalysts for Energy Conversion
4.20
DOISourceOpenAlex
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