Sub‐Nanometer‐Scale Cu9S5 Enables Efficiently Electrochemical Nitrate Reduction to Ammonia

Chao Feng; Hanyang Wu; Jiaxin Shao; Qihua Huo; Afaq Hassan; Hengpan Yang; Qi Hu; Chuanxin He

doi:10.1002/aenm.202403354

Sub‐Nanometer‐Scale Cu9S5 Enables Efficiently Electrochemical Nitrate Reduction to Ammonia

Abstract

The sub-nanometer is a key feature size in materials science. Unlike single-atom and nanomaterials, size effects and inter-component cooperative actions in sub-nanomaterials will effective on its performance is more significant. Here, 0.95 nm ordered arrangement Cu9S5 sub-nanowires (Cu9S5 SNWs) are synthesized through the co-assembly effect of inorganic nuclei (Cu9S5) and clusters (phosphotungstic acid-PTA), achieving a significant increase in the specific surface area of the sample and ≈100% atomic exposure rate, which is the key to its high catalytic activity. PTA clusters not only act as a “charge transfer station” to accelerate the inter-component electron transfer process, but also facilitate the dissociation of water and provide more hydrogen protons, thus dramatically facilitating the electrocatalytic process. The experimental results show that the Cu9S5 SNWs exhibited excellent nitrate reduction reaction (NO3−RR) properties. The Faraday efficiency (FE) of NO3−RR is 90.4% at the optimum potential −0.3 VRHE (reversible hydrogen electrode) and the ammonia production is as high as 0.37 mmol h−1 cm−2, which is superior to most reported electrocatalysts. In addition, the Zn-NO3− liquid-flow battery devices assembled using Cu9S5 SNWs as electrode materials show excellent application results. This work provides a reference for the design of highly efficient sub-nanoscale NO3−RR electrocatalysts.

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Authors (8)

Chao Feng
Hanyang Wu
Jiaxin Shao
Qihua Huo
Afaq Hassan
Hengpan Yang
Qi Hu
Chuanxin He

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Category:

Articles

Type:

artykuły w czasopismach dostępnych w wersji elektronicznej [także online]

Published in:

Advanced Energy Materials
ISSN: 1614-6832

Language:

English

Publication year:

2024

Bibliographic description:

Feng C., Wu H., Shao J., Huo Q., Hassan A., Yang H., Hu Q., He C., Sub‐Nanometer‐Scale Cu9S5 Enables Efficiently Electrochemical Nitrate Reduction to Ammonia, Advanced Energy Materials, 2024,10.1002/aenm.202403354

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