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Crystal‐Phase‐Engineered PdCu Electrocatalyst for Enhanced Ammonia Synthesis.

Authors :
Tong, Wu
Huang, Bolong
Wang, Pengtang
Li, Leigang
Shao, Qi
Huang, Xiaoqing
Source :
Angewandte Chemie International Edition. 2/10/2020, Vol. 59 Issue 7, p2649-2653. 5p.
Publication Year :
2020

Abstract

Crystal phase engineering is a powerful strategy for regulating the performance of electrocatalysts towards many electrocatalytic reactions, while its impact on the nitrogen electroreduction has been largely unexplored. Herein, we demonstrate that structurally ordered body‐centered cubic (BCC) PdCu nanoparticles can be adopted as active, selective, and stable electrocatalysts for ammonia synthesis. Specifically, the BCC PdCu exhibits excellent activity with a high NH3 yield of 35.7 μg h−1 mg−1cat, Faradaic efficiency of 11.5 %, and high selectivity (no N2H4 is detected) at −0.1 V versus reversible hydrogen electrode, outperforming its counterpart, face‐centered cubic (FCC) PdCu, and most reported nitrogen reduction reaction (NRR) electrocatalysts. It also exhibits durable stability for consecutive electrolysis for five cycles. Density functional theory calculation reveals that strong orbital interactions between Pd and neighboring Cu sites in BCC PdCu obtained by structure engineering induces an evident correlation effect for boosting up the Pd 4d electronic activities for efficient NRR catalysis. Our findings open up a new avenue for designing active and stable electrocatalysts towards NRR. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14337851
Volume :
59
Issue :
7
Database :
Academic Search Index
Journal :
Angewandte Chemie International Edition
Publication Type :
Academic Journal
Accession number :
141526404
Full Text :
https://doi.org/10.1002/anie.201913122