DataVXAdvanced Functional MaterialsPaper
journal article·2025-01

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

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

Advanced Functional Materials· Volume 35· Issue 3
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Source abstract

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‐Ni3N, 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‐Ni3N 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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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science · Semiconductor materials and devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Hubei Key Laboratory of Energy Storage and Power Battery School of Mathematics Physics and Optoelectronic Engineering Hubei University of Automotive Technology Shiyan 442002 China

Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Macau 999078 China

Department of Physics and Electronic Engineering Yancheng Teachers University Yancheng 224002 China

College of Textiles and Clothing Yancheng Institute of Technology Yancheng 224000 China

Yunnan Key Laboratory for Micro/Nano Materials & Technology National Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University Kunming 650091 China

Key Laboratory of Automotive Power Train and Electronics School of Automotive Engineering Hubei University of Automotive Technology Shiyan 442002 China

Department of Physics and Chemistry Faculty of Science and Technology University of Macau Macau 999078 China

Funding

Hubei University of Automotive Technology · Fundo para o Desenvolvimento das Ciências e da Tecnologia · Universidade de Macau

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