Solar‐Powered Gram‐Scale Ammonia Production from Nitrate-Reference-Cited by-同舟云学术

Solar‐Powered Gram‐Scale Ammonia Production from Nitrate

Published:2024-07-02 Issue: Volume: Page:
ISSN:1613-6810
Container-title:Small
language:en
Short-container-title:Small

Author:

Gnanasekar Paulraj¹^ORCID,Peramaiah Karthik²³,Zhang Huafan¹,Alsayoud Ibrahim G.¹,Subbiah Anand S.⁴,Babics Maxime⁴,Ng Tien Khee¹,Gan Qiaoqiang³,De Wolf Stefaan⁴,Huang Kuo‐Wei²³,Ooi Boon S.¹

Affiliation:

1. Photonics Laboratory, Computer, Electrical, and Mathematical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia

2. KAUST Catalysis Center Division of Physical Science and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia

3. Department of Physical Science and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia

4. KAUST Photovoltaics Laboratory, KAUST Solar Center, Department of Physical Science and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia

Abstract

AbstractThe photoelectrochemical (PEC) method has the potential to be an attractive route for converting and storing solar energy as chemical bonds. In this study, a maximum NH3 production yield of 1.01 g L−1 with a solar‐to‐ammonia conversion efficiency of 8.17% through the photovoltaic electrocatalytic (PV‐EC) nitrate (NO3−) reduction reaction (NO3−RR) is achieved, using silicon heterojunction solar cell technology. Additionally, the effect of tuning the operation potential of the PV‐EC system and its influence on product selectivity are systematically investigated. By using this unique external resistance tuning approach in the PV‐EC system, ammonia production through nitrate reduction performance from 96 to 360 mg L−1 is enhanced, a four‐fold increase. Furthermore, the NH3 is extracted as NH4Cl powder using acid stripping, which is essential for storing chemical energy. This work demonstrates the possibility of tuning product selectivity in PV‐EC systems, with prospects toward pilot scale on value‐added product synthesis.

Funder

King Abdullah University of Science and Technology

Publisher

Wiley

Link

https://onlinelibrary.wiley.com/doi/pdf/10.1002/smll.202404249

Reference54 articles.

1. Nitrogen fixation: Anthropogenic enhancement-environmental response

2. Nitrogen limitation on land and in the sea: How can it occur?

3. Progress and prospects of electrochemical reduction of nitrate to restore the nitrogen cycle

4. Removal of nitrate from aqueous solution by nitrate selective ion exchange resins

5. Selective nitrate removal from groundwater using a hybrid nanofiltration–reverse osmosis filtration scheme