A bifunctional CoNi alloy for electrocatalytically coupled cathodic nitrate reduction and anodic HPAM oxidation
Fu Y. Qi L. Kang W. Aidarova S.B. Yang H. Liu S.
15 June 2025Elsevier B.V.
Journal of Electroanalytical Chemistry
2025#987
The construction of electrocatalytic cathodic nitrate reduction and anodic polyacrylamide (HPAM) oxidation reactions is a promising new electrocatalytic reaction system, which promises simultaneous ammonia synthesis and HPAM degradation. Here, we synthesised an N-doped C nanotube-encapsulated CoNi nano-alloy and used it for electrocatalytic NO3− reduction and HPAM oxidation reactions. Therein, CoNi-0.5 could achieve the maximum ammonia yield and Faraday efficiency of 5516.73 ± 66.07 μg h−1 mgcat−1 and 94.71 ± 1.21 %, respectively. Meanwhile, the maximum degradation rate of HPAM was 73.02 ± 1.16 % at 2 h. By In-situ ATR-SEIRAS, in-situ DEMS demonstrated that *NOH is an important reaction intermediate in the ammonia synthesis process, and the bimetallic CoNi alloy can effectively reduce the reaction energy barrier for NO3− reduction. This work presents a new strategy for constructing a coupled system for electrocatalytic NO3− reduction.
ammonia synthesis , Bifunctional CoNi alloy , Electrocatalysis , HPAM oxidation
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Kazakh-British Technical University, Almaty, 050000, Kazakhstan
School of Petroleum Engineering China University of Petroleum (East China), Qingdao, 266580, China
Shenyang Fire Research Institute of MEM, Shenyang, 110034, China
Kazakh-British Technical University
School of Petroleum Engineering China University of Petroleum (East China)
Shenyang Fire Research Institute of MEM
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