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Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

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Related Experiment Video

Updated: Sep 16, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

High-Density Atomically Dispersed CuSn Bimetallic Catalyst for Efficient N₂-Selective Electrocatalytic

Wanchao Song¹, Hua Zou^1,2, Guoshuai Liu¹

¹Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment & Ecology, Jiangnan University, Wuxi, 214122, China.

Small (Weinheim an Der Bergstrasse, Germany)

|July 10, 2025

Summary

Researchers developed a novel bimetallic electrocatalyst (CuSn-NC) for efficient electrocatalytic denitrification (ECDN). This catalyst significantly enhances nitrogen-neutral cycles by improving N2 selectivity in nitrate reduction, offering a promising sustainable solution.

Keywords:

CuSn bimetallic single‐atom electrocatalyst N2 selectivity electrocatalytic denitrification p‐d orbital hybridization

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Last Updated: Sep 16, 2025

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Area of Science:

Materials Science
Electrochemistry
Environmental Science

Background:

Electrocatalytic denitrification (ECDN) is crucial for nitrogen-neutral cycles but suffers from poor N2 selectivity due to intermediate adsorption and slow N-N coupling.
Existing methods struggle to stabilize key intermediates, hindering efficient conversion of nitrate (NO3-) to nitrogen gas (N2).

Purpose of the Study:

To design and investigate a bimetallic single-atom electrocatalyst for highly N2-selective electrocatalytic denitrification.
To elucidate the mechanism of p-d orbital hybridization in enhancing catalytic activity and selectivity.

Main Methods:

Synthesis of a high-density, V-shaped, atomically dispersed bimetallic electrocatalyst (CuSn-NC) with specific Cu-N3 and Sn-N2 active sites.
Utilizing operando measurements and theoretical calculations to analyze the electronic structure and catalytic mechanism.
Evaluating nitrate removal efficiency and N2 selectivity under electrocatalytic conditions.

Main Results:

The CuSn-NC electrocatalyst achieved 94.1% nitrate removal with an N2 selectivity of 81.7%.
Operando studies and theoretical calculations confirmed p-d orbital hybridization between Cu and Sn, optimizing intermediate binding.
The synergistic effect at Cu-N3 and Sn-N2 sites accelerated both the rate-determining and selectivity-determining steps in ECDN.

Conclusions:

The study demonstrates a proof-of-concept for designing bimetallic single-atom electrocatalysts for highly N2-selective ECDN.
The developed CuSn-NC catalyst offers a promising approach for achieving nitrogen neutrality through efficient nitrate reduction.
Triggering p-d orbital hybridization is an effective strategy for enhancing electrocatalytic performance in denitrification.