Coordination tunes the activity and selectivity of the nitrogen reduction reaction on single-atom iron catalysts: a computational study

Author(s):  
Dongxu Jiao ◽  
Yuejie Liu ◽  
Qinghai Cai ◽  
Jingxiang Zhao

By introducing B coordination, the catalytic performance of Fe-N4/G can be greatly enhanced.

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 974
Author(s):  
Bing Han ◽  
Haihong Meng ◽  
Fengyu Li ◽  
Jingxiang Zhao

Under the current double challenge of energy and the environment, an effective nitrogen reduction reaction (NRR) has become a very urgent need. However, the largest production of ammonia gas today is carried out by the Haber–Bosch process, which has many disadvantages, among which energy consumption and air pollution are typical. As the best alternative procedure, electrochemistry has received extensive attention. In this paper, a catalyst loaded with Fe3 clusters on the two-dimensional material C2N (Fe3@C2N) is proposed to achieve effective electrochemical NRR, and our first-principles calculations reveal that the stable Fe3@C2N exhibits excellent catalytic performance for electrochemical nitrogen fixation with a limiting potential of 0.57 eV, while also suppressing the major competing hydrogen evolution reaction. Our findings will open a new door for the development of non-precious single-cluster catalysts for effective nitrogen reduction reactions.


2021 ◽  
Author(s):  
Shengbo Zhang ◽  
Miaomiao Han ◽  
Tongfei Shi ◽  
Haimin Zhang ◽  
Yue Lin ◽  
...  

Abstract The intriguing features of single-atom catalysts (SACs) could bring catalysis into a new paradigm, however, controllably synthesising SACs with desired SA loadings and coordination forms are challenging. Here, we report an adsorption-regulated approach to precisely control the synthesis of bimetallic Fe-Co SAs on carbon. Bacterial cellulose (BC) is utilised as an adsorption regulator to controllably impregnate Fe3+/Co2+ on BC and through carbonisation to anchor Fe-Co SAs on BC-derived carbon via bimetallic [(O-C2)3Fe-Co(O-C2)3] coordination with desired Fe/Co contents and atomic ratios. Under electrocatalytic nitrogen reduction reaction (NRR) conditions, [(O-C2)3Fe-Co(O-C2)3] is operando transformed to [(O-C2)3Fe-Co(O-C)C2] that promotes and sustains NRR performance. A superb ammonia yield of 574.8 ± 35.3 μg h-1 mgcat.-1 with an exceptional faradaic efficiency of 73.2 ± 4.6% are obtained from an electrocatalyst with the highest bimetallic Fe-Co site density. The exemplified synthetic approach would be of generically applicable to controllably anchor SAs on carbon that enables meaningfully investigate and rationally design SACs.


2020 ◽  
Vol 1 (5) ◽  
pp. 1285-1292 ◽  
Author(s):  
Yiran Ying ◽  
Ke Fan ◽  
Xin Luo ◽  
Jinli Qiao ◽  
Haitao Huang

Single Sc/Ti atoms supported on TCNQ monolayers have been explored as outstanding electrocatalysts for nitrogen reduction.


Nanoscale ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 4903-4908 ◽  
Author(s):  
Kang Liu ◽  
Junwei Fu ◽  
Li Zhu ◽  
Xiaodong Zhang ◽  
Hongmei Li ◽  
...  

Electrochemical nitrogen reduction reaction (NRR) is a promising route to produce ammonia under mild conditions. Single-atom W supported on BP was screened as a promising electrocatalyst with high catalytic activity, stability, and selectively for NRR.


2020 ◽  
Vol 132 (19) ◽  
pp. 7341-7341
Author(s):  
Chun‐Chao Hou ◽  
Lianli Zou ◽  
Liming Sun ◽  
Kexin Zhang ◽  
Zheng Liu ◽  
...  

Nanoscale ◽  
2020 ◽  
Vol 12 (45) ◽  
pp. 23206-23212
Author(s):  
Qi Xue ◽  
Yi Xie ◽  
Simson Wu ◽  
Tai-Sing Wu ◽  
Yun-Liang Soo ◽  
...  

We investigate the geometric and electronic properties of single-atom catalysts (SACs) for electrocatalytic CO2 reduction reaction (eCO2RR).


2020 ◽  
Vol 8 (10) ◽  
pp. 5209-5216 ◽  
Author(s):  
Mohammad Zafari ◽  
Deepak Kumar ◽  
Muhammad Umer ◽  
Kwang S. Kim

Machine learning (ML) methods would significantly reduce the computational burden of catalysts screening for nitrogen reduction reaction (NRR).


Author(s):  
Yiwen Liu ◽  
Zhiqiang Zhao ◽  
Wei Wei ◽  
Xiangyuan Jin ◽  
Guo Wang ◽  
...  

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