DataVXACS Materials LettersPaper
journal article·2024-07-01

A Cu–Co3O4 Tandem Catalyst for Efficient Electrocatalytic Nitrate Reduction at Low Concentration

Junchao Yu, Zichao Xi, Jinhui Su, Lei Li, Peng Jing, Xuan Xu, Baocang Liu, Jun Zhang

ACS Materials Letters· Volume 6· Issue 7
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Source abstract

Abstract

Electrocatalytic reduction of nitrate (NO 3 – ) in waste streams to valuable ammonia under ambient conditions is a green route for nitrate remediation. However, efficient catalysts are required for this multistep proton coupled electron transfer reaction. This work presented a tandem catalyst composed of N-doped carbon layer coated Co 3 O 4 coupled with CuO x as a highly efficient and selective electrocatalyst for NO 3 – reduction to NH 3 at low onset potential. The tandem catalysis of NO 3 – → NO 2 – → NH 3 over the two synergistical sites of in situ generated metallic Cu and Co 3 O 4 was verified by experiments and theoretical calculations. Benefiting from the two coupled active sites, the catalyst exhibited an ammonia yield rate of 3.23 mg h –1 cm –2 and a Faradaic efficiency of 93.77% at an ultralow potential of −0.1 V versus RHE. This work opens a new avenue for the design of highly efficient tandem catalysts for electrocatalytic nitrate reduction.
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Research context

Catalysis & surfaces

OpenAlex topics: Ammonia Synthesis and Nitrogen Reduction · Advanced Photocatalysis Techniques · Caching and Content Delivery

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

Affiliations

College of Chemistry and Chemical Engineering, Inner Mongolia University, 49 Xilinguole South Road, Hohhot 010020, P. R. China

College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China

School of Chemistry and Environmental Science, Inner Mongolia Normal University, 81 Zhaowuda Road, Hohhot 010022, P. R. China

Funding

Research Program of Science and Technology at Universities of Inner Mongolia Autonomous Region · Science and Technology Major Project of Inner Mongolia · Inner Mongolia University · Natural Science Foundation of Inner Mongolia Autonomous Region · National Natural Science Foundation of China · Higher Education Discipline Innovation Project · Science and Technology Project of Ordos · Grassland-Talent Innovation Team of Inner Mongolia · Grassland Leading Talent Program of Inner Mongolia

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