Controllable synthesis of a hollow Cr<sub>2</sub>O<sub>3</sub> electrocatalyst for enhanced nitrogen reduction toward ammonia synthesis

Lei Shi; Yu Yin; Hong Wu; Rajan Arjan Kalyan Hirani; Xinyuan Xu; Jinqiang Zhang; Nasir Rafique; Abdul Hannan Asif; Shu Zhang; Hongqi Sun

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Controllable synthesis of a hollow Cr₂O₃ electrocatalyst for enhanced nitrogen reduction toward ammonia synthesis

Catalysis, Kinetics and Reaction Engineering | Updated：2026-01-06

- Controllable synthesis of a hollow Cr₂O₃ electrocatalyst for enhanced nitrogen reduction toward ammonia synthesis
- Chinese Journal of Chemical Engineering Vol. 41, Issue 1, Pages: 358-365(2022)
- Affiliations：
  
  1. School of Engineering, Edith Cowan University, Joondalup,WA,Australia,6027
  2. College of Materials Science and Engineering, Nanjing Forestry University,Nanjing,China,210037
  3. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology,Zhenjiang,China,212003
- Author bio：
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- DOI：
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- Published：2022
- Accepted：
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摘要

Abstract

As a fascinating alternative to the energy-intensive Haber-Bosch process

the electrochemically-driven N

reduction reaction (NRR) utilizing the N

and H

O for the production of NH

has received enormous attention. The development and preparation of promising electrocatalysts are requisite to realize an efficient N

conversion for NH

production. In this research

we propose a template-assisted strategy to construct the hollow electrocatalyst with controllable morphology. As a paradigm

the hollow Cr

nanocatalyst with a uniform size (~170 nm)

small cavity and ultrathin shell (~15 nm) is successfully fabricated with this strategy. This promising hollow structure is favourable to trap N

into the cavity

provides abundant active sites to accelerate the three-phase interactions

and facilitates the reactant transfer across the shell. Attributed to these synergetic effects

the designed catalyst displays an outstanding behaviour in N

fixation for NH

production in ambient condition. In the neutral electrolyte of 0.

1 mol·L

-1

an impressive electrocatalytic performance with the NH

generation rate of 2.72 μg·h

-1

·cm

-2

and a high FE of 5.31% is acquired respectively at -0.85 V with the hollow Cr

catalyst. Inspired by this work

it is highly expected that this approach could be applied as a universal strategy and extended to fabricating other promising electrocatalysts for realizing highly efficient nitrogen reduction reaction (NRR).

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Controllable synthesis of a hollow Cr2O3 electrocatalyst for enhanced nitrogen reduction toward ammonia synthesis

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Controllable synthesis of a hollow Cr₂O₃ electrocatalyst for enhanced nitrogen reduction toward ammonia synthesis